Semiconductor Patents (Class 372/43.01)
  • Patent number: 11909174
    Abstract: A reflection filter device includes: a ring resonator filter including a ring-shaped waveguide and two arms, each of the two arms being optically coupled to the ring-shaped waveguide; and a dual-branch portion including a light input/output port and two branch ports, the light input/output port being configured to allow input and output of light, the two branch ports being configured to allow output of the light input from the light input/output port, the light being split into two, the two arms being connected to the two branch ports, respectively, at least one of the two arms being equipped with a phase adjuster.
    Type: Grant
    Filed: August 6, 2020
    Date of Patent: February 20, 2024
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Yasumasa Kawakita, Yasutaka Higa
  • Patent number: 11881684
    Abstract: A semiconductor laser element includes: an n-side semiconductor layer formed of a nitride semiconductor; an active layer disposed on or above the n-side semiconductor layer and formed of a nitride semiconductor; a p-side semiconductor layer disposed on the active layer, formed of a nitride semiconductor, and including: an undoped first part disposed in contact with an upper face of the active layer and comprising at least one semiconductor layer, an electron barrier layer disposed in contact with an upper face of the first part, containing a p-type impurity, and having a band gap energy that is larger than a band gap energy of the first part, and a second part disposed in contact with the upper face of the electron barrier layer and comprising at least one p-type semiconductor layer containing a p-type impurity; and a p-electrode disposed in contact with the upper face of the second part.
    Type: Grant
    Filed: March 3, 2022
    Date of Patent: January 23, 2024
    Assignee: NICHIA CORPORATION
    Inventor: Yoshitaka Nakatsu
  • Patent number: 11870218
    Abstract: A light emission device of one embodiment reduces zero-order light included in output of an S-iPM laser. The light emission device includes a light emission unit and a phase modulation layer. The phase modulation layer has a base layer and modified refractive index regions each including modified refractive index elements. In each unit constituent region centered on a lattice point of an imaginary square lattice set on the phase modulation layer, the distance from the corresponding lattice point to each of the centers of gravity of the modified refractive index elements is greater than 0.30 times and is not greater than 0.50 times of the lattice spacing. In addition, the distance from the corresponding lattice point to the center of gravity of the modified refractive index elements as a whole is greater than 0 and is not greater than 0.30 times of the lattice spacing.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: January 9, 2024
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kazuyoshi Hirose, Takahiro Sugiyama, Yuu Takiguchi, Yoshiro Nomoto, Soh Uenoyama
  • Patent number: 11862929
    Abstract: The present disclosure provides a laser diode package module. The laser diode package module includes a substrate including a first surface; a cover disposed on the first surface of the substrate; an accommodation space formed between the substrate and the cover; a laser diode die disposed in the accommodation space; and a reflective surface disposed in the accommodation space for outputting light of the laser diode die reflected by the reflective surface and transmitted through a light-transmitting area. The light-transmitting area is at least partially disposed on a surface of the cover opposite the substrate.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: January 2, 2024
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Xiang Liu, Guoguang Zheng, Xiaoping Hong, Mingyu Wang, Shuai Dong
  • Patent number: 11837838
    Abstract: Various designs of semiconductor lasers may comprise a waveguide having a front region that is configured to support a plurality of transverse laser cavity modes and a rear region that support only one transverse laser cavity mode. These front and rear regions may be disposed between front and rear reflectors and may provide optical gain. Some such designs may be useful for providing higher power single mode semiconductor lasers.
    Type: Grant
    Filed: January 29, 2021
    Date of Patent: December 5, 2023
    Assignee: Freedom Photonics LLC
    Inventor: Gordon Barbour Morrison
  • Patent number: 11769857
    Abstract: A micro light-emitting device, including a first type semiconductor layer, a light-emitting layer, a second type semiconductor layer, a first type electrode, a second type electrode, and a light reflection layer, is provided. The light-emitting layer is arranged on the first type semiconductor layer. The second type semiconductor layer is arranged on the light-emitting layer. The first type electrode and the second type electrode are both arranged on the second type semiconductor layer. The light reflection layer is arranged between the light-emitting layer and the first type electrode. The light reflection layer includes an oxidized area and a non-oxidized area. A reflectance of the oxidized area is greater than a reflectance of the non-oxidized area. An orthographic projection of a part of the oxidized area on the first type semiconductor layer and an orthographic projection of the first type electrode on the first type semiconductor layer at least partially overlap.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: September 26, 2023
    Assignee: PlayNitride Display Co., Ltd.
    Inventors: Yen-Chun Tseng, Tzu-Yang Lin, Jyun-De Wu, Yi-Chun Shih
  • Patent number: 11762272
    Abstract: A light-source device includes an excitation light source; a wavelength conversion unit to convert at least some of first color light into second color light; a light mixing element including a rod integrator to mix at least one of the first color light and the second color light from the conversion unit; and an optical element on an optical path of the first color light and having a reflecting surface. A center of the first color light on the reflecting surface intersects with only one of a first light flux of the first color light incident on and a second light flux of the first color light emitted from the conversion unit. An angle formed by a projection straight line of the first color light incident on an incident aperture of the integrator and a predetermined axial line of the incident aperture of the integrator is smaller than 40°.
    Type: Grant
    Filed: October 20, 2022
    Date of Patent: September 19, 2023
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kasumi Nakamura, Yohei Takano, Makoto Hirakawa, Kazuhiro Fujita
  • Patent number: 11677214
    Abstract: The present disclosure relates to a diode laser having reduced beam divergence. Some implementations reduce a beam divergence in the far field by means of a deliberate modulation of the real refractive index of the diode laser. An area of the diode laser (e.g., the injection zone), may be structured with different materials having different refractive indices. In some implementations, the modulation of the refractive index makes it possible to excite a supermode, the field of which has the same phase (in-phase mode) under the contacts. Light, which propagates under the areas of a lower refractive index, obtains a phase shift of ? after passing through the index-guiding trenches. Consequently, the in-phase mode is supported and the formation of the out-of-phase mode is prevented. Consequently, the laser field can, in this way, be stabilized even at high powers such that only a central beam lobe remains in the far field.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: June 13, 2023
    Assignee: FERDINAND-BRAUN-INSTITUT GGMBH, LEIBNIZ-INSTITUT FÜR HÖCHSTFREQUENZTECHNIK
    Inventors: Anissa Zeghuzi, Jan-Philipp Koester, Hans Wenzel, Heike Christopher, Andrea Knigge
  • Patent number: 11616339
    Abstract: A light source device includes: first and second laser diodes; a reflector having: first and second reflecting faces configured to reflect a portion of light from the respective first and second laser diodes and to transmit a portion of the light from the respective first and second laser diodes, and first and second exit faces configured to allow the portions of the light transmitted through the respective first and second reflecting faces to exit; and a photodetector including: first and second light receiving element configured to receive light exiting the first and second exit faces, respectively. The reflector is configured such that the light transmitted through the first reflecting face is hindered from exiting the second exit face and the light transmitted through the second reflecting face is hindered from exiting the first exit face.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: March 28, 2023
    Assignee: NICHIA CORPORATION
    Inventors: Yoshihiro Kimura, Tadaaki Miyata
  • Patent number: 11611018
    Abstract: A red-light emitting diode includes an n-doped portion, a p-doped portion, and a light emitting region located between the n-doped portion and a p-doped portion. The light emitting region includes a light-emitting indium gallium nitride layer emitting light at a peak wavelength between 600 and 750 nm under electrical bias thereacross, an aluminum gallium nitride layer located on the light-emitting indium gallium nitride layer. and a GaN barrier layer located on the aluminum gallium nitride layer.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: March 21, 2023
    Assignee: NANOSYS, INC.
    Inventors: Fariba Danesh, Richard P. Schneider, Jr., Fan Ren, Michael Jansen, Nathan Gardner
  • Patent number: 11556411
    Abstract: A quantum computer includes a quantum processor that includes a first plurality of qubits arranged in a hexagonal lattice pattern such that each is substantially located at a hexagon apex, and a second plurality of qubits each arranged substantially along a hexagon edge. Each of the first plurality of qubits is coupled to three nearest-neighbor qubits of the second plurality of qubits, and each of the second plurality of qubits is coupled to two nearest-neighbor qubits of the first plurality of qubits. Each of the second plurality of qubits is a control qubit at a control frequency. Each of the first plurality of qubits is a target qubit at one of a first target frequency or a second target frequency. The quantum computer includes an error correction device configured to operate on the hexagonal lattice pattern of the plurality of qubits so as to detect and correct data errors.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: January 17, 2023
    Assignee: International Business Machines Corporation
    Inventors: Andrew W. Cross, Christopher Chamberland, Jay M. Gambetta, Jared B. Hertzberg, Theodore J. Yoder, Guanyu Zhu
  • Patent number: 11506967
    Abstract: A light-source device includes an excitation light source; a wavelength conversion unit to convert at least some of first color light into second color light; a light mixing element including a rod integrator to mix at least one of the first color light and the second color light from the conversion unit; and an optical element on an optical path of the first color light and having a reflecting surface. A center of the first color light on the reflecting surface intersects with only one of a first light flux of the first color light incident on and a second light flux of the first color light emitted from the conversion unit. An angle formed by a projection straight line of the first color light incident on an incident aperture of the integrator and a predetermined axial line of the incident aperture of the integrator is smaller than 40°.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: November 22, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kasumi Nakamura, Yohei Takano, Makoto Hirakawa, Kazuhiro Fujita
  • Patent number: 11467260
    Abstract: A distance measuring apparatus has a substrate supporting, on a first surface thereof, a light source that emits light and a first optical element that decreases the intensity of the emitted light, and a processor on a second surface opposite the first surface. A light receiving element and a second optical element, which is at a higher position than the light receiving element, both receive the emitted light after reflecting from an object. A frame is connected to the substrate and spaces the first optical element and the second optical element a predetermined distance apart from the light source and the light receiving element, and a partition is disposed between the light source and the light receiving element, thereby defining a first cavity housing the light source and a second cavity housing the light receiving element. The processor is electrically connected to the light source and controls the light source.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: October 11, 2022
    Assignee: NAMUGA CO., LTD.
    Inventor: Jun Youb Lee
  • Patent number: 11462883
    Abstract: A CMOS inverter circuit is provided as a circuit to modulate a current flowing into a laser diode on the basis of a digital signal. An amplitude of a current flowing in a PMOSFET in the CMOS inverter circuit is made to contribute to an amplitude of the current flowing into the laser diode, to reduce an input amplitude.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: October 4, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Toshiki Kishi, Munehiko Nagatani, Shinsuke Nakano, Hideyuki Nosaka
  • Patent number: 11411373
    Abstract: Edge-emitting laser diodes having mirror facets include passivation coatings that are conditioned using an ex-situ process to condition the insulating material used to form the passivation layer. An external energy source (laser, flash lamp, e-beam) is utilized to irradiate the material at a given dosage and for a period of time sufficient to condition the complete thickness of passivation layer. This ex-situ laser treatment is applied to the layers covering both facets of the laser diode (which may comprise both the passivation layers and the coating layers) to stabilize the entire facet overlay. Importantly, the ex-situ process can be performed while the devices are still in bar form.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: August 9, 2022
    Assignee: II-VI Delaware, Inc.
    Inventors: Abram Jakubowicz, Martin Sueess
  • Patent number: 11394170
    Abstract: A light emitting device includes a package defining a recess, a cap and at least one laser element. The cap is fixed to the package so as to cover the recess. The cap includes a light-transmissive member having a lower surface facing the package and an upper surface, the lower surface having a light extraction region, and a light blocking film arranged on the lower surface so as to avoid the light extraction region, the light blocking film including a mark representing prescribed information. The at least one laser element is disposed in a space bounded by the cap and the package at a prescribed position such that the light extraction region is irradiated by laser light emitted from the at least one laser element. At least a part of the at least one laser element overlaps at least a part of the light blocking film in a top view.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: July 19, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Takuya Hashimoto, Soichiro Miura
  • Patent number: 11329242
    Abstract: A lighting device comprises a substrate including an active area; a first electrode disposed on the substrate and including a transparent conductive material; an organic material layer disposed on the first electrode and including a first light emitting layer and a second light emitting layer; and a second electrode disposed on the organic material layer and including a reflective material, wherein the first light emitting layer emits light having a first wavelength and the second light emitting layer emits light having a second wavelength, and wherein the second light emitting layer includes a first dopant absorbing the light having the first wavelength and emitting the light having the second wavelength.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: May 10, 2022
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jaemin Moon, Jina You, JungHyoung Lee, SunHee Lee, JangDae Youn
  • Patent number: 11309687
    Abstract: The present embodiment relates to a light-emitting device or the like having a structure capable of reducing one power of ±1st-order light with respect to the other power. The light-emitting device includes a substrate, a light-emitting portion, and a phase modulation layer including a base layer and a plurality of modified refractive index regions. Each of the plurality of modified refractive index regions has a three-dimensional shape defined by a first surface facing the substrate, a second surface positioned on a side opposite to the substrate with respect to the first surface, and a side surface. In the three-dimensional shape, at least one of the first surface, the second surface, and the side surface has a portion inclined with respect to a main surface.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: April 19, 2022
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Kazuyoshi Hirose, Yoshitaka Kurosaka, Yuu Takiguchi, Takahiro Sugiyama
  • Patent number: 11276981
    Abstract: A power sourcing equipment (PSE) device of an optical power supply system includes a semiconductor laser that oscillates with electric power, thereby outputting feed light. The semiconductor laser includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less. A powered device of the optical power supply system includes a photoelectric conversion element that converts feed light into electric power. The photoelectric conversion element includes a semiconductor region exhibiting a light-electricity conversion effect. A semiconductor material of the semiconductor region is a laser medium having a laser wavelength of 500 nm or less.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: March 15, 2022
    Assignee: KYOCERA CORPORATION
    Inventor: Tomonori Sugime
  • Patent number: 11271372
    Abstract: An optical apparatus includes a light emitting device and a substrate. The light emitting device includes a base including a main body portion containing a ceramic material and wire portions exposed from the main body portion on the lower surface of the base, a lid portion fixed to the base so that a hermetically sealed space is defined by the lid portion and the base, a first semiconductor laser element emitting blue light and provided in the hermetically sealed space, a second semiconductor laser element emitting red light and provided in the hermetically sealed space, a third semiconductor laser element emitting green light and provided in the hermetically sealed space, and a collimate lens arranged on paths of the blue light, the red light and the green light. The substrate includes first metallic films electrically connected with the base of the light emitting device via the wire portions.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: March 8, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Soichiro Miura, Kazuma Kozuru
  • Patent number: 11262500
    Abstract: A semiconductor device includes a semiconductor substrate having a first surface, a second surface opposite to the first surface, and having a first recess portion formed on the first surface, a first cladding layer located in the first recess portion, and a first optical waveguide formed on the first cladding layer. The first optical waveguide overlaps with the first cladding layer in plan view.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: March 1, 2022
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Tetsuya Iida, Yasutaka Nakashiba, Seigo Namioka, Tomoo Nakayama
  • Patent number: 11245244
    Abstract: An optical module includes: an optical component; a base portion on which the optical component is mounted; a housing that includes sidewalls extending from the base portion in a height direction to surround the base portion; a cover member that defines, along with the housing, an accommodation space in which the optical component is disposed; and a resin for fixing the housing to the cover member. The cover member includes: an opposing surface that faces the base portion of the housing in the height direction; a first lateral cover surface extending along the height direction; and a second lateral cover surface extending in the height direction. The second lateral cover surface is disposed on an opposite side of the first lateral cover surface.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: February 8, 2022
    Assignee: Fujikura Ltd.
    Inventor: Akari Takahashi
  • Patent number: 11227976
    Abstract: A semiconductor light emitting element includes: an n-type semiconductor layer made of an n-type aluminum gallium nitride (AlGaN)-based semiconductor material provided on a substrate; an active layer made of an AlGaN-based semiconductor material provided on the n-type semiconductor layer; a p-type semiconductor layer provided on the active layer; and a covering layer made of a dielectric material that covers the n-type semiconductor layer, the active layer, and the p-type semiconductor layer. Each of the active layer and the p-type semiconductor layer has a sloped surface that is sloped at a first angle with respect to the substrate and is covered by the covering layer. The n-type semiconductor layer has a sloped surface that is sloped at a second angle larger than the first angle with respect to the substrate and is covered by the covering layer.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: January 18, 2022
    Assignee: NIKKISO CO., LTD.
    Inventors: Noritaka Niwa, Tetsuhiko Inazu
  • Patent number: 11220743
    Abstract: A composite substrate including a substrate and an aluminum nitride layer is provided. The aluminum nitride layer is disposed on a top surface of the substrate. Silicon is doped in the aluminum nitride layer to regulate residual stress, a film thickness of the aluminum nitride layer is less than 3.5 ?m, a defect density of the aluminum nitride layer is less than or equal to 5×109/cm2, and a root mean square roughness of the top surface, facing away from the substrate, of the aluminum nitride layer is less than 3 nm. A manufacturing method of a composite substrate is also provided.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: January 11, 2022
    Assignee: Industrial Technology Research Institute
    Inventor: Chia-Yen Huang
  • Patent number: 11189754
    Abstract: A semiconductor substrate is provided in the present disclosure. The semiconductor substrate includes a first semiconductor layer and a second semiconductor layer on the first semiconductor layer. The first semiconductor layer has a first lattice constant (L1) and the second semiconductor layer has a second lattice constant (L2). A ratio of a difference (L2-L1) between the second lattice constant (L2) and the first lattice constant (L1) to the first lattice constant (L1) is greater than 0.036.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: November 30, 2021
    Assignee: Epistar Corporation
    Inventors: Meng-Yang Chen, Rong-Ren Lee
  • Patent number: 11189750
    Abstract: A method of separating a wafer including rows of light emitting devices is described. Dicing streets are provided on the wafer such that a respective one of the dicing streets is provided between each of the rows of light emitting devices on the wafer. The wafer is broken along a first one of the dicing streets to separate a first portion of the wafer from a remaining portion of the wafer. The first portion of the wafer includes more than one of the rows of light emitting devices. The first portion of the wafer is broken along a second one of the dicing streets to separate a second portion of the wafer from the first portion of the wafer.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: November 30, 2021
    Assignee: Lumileds LLC
    Inventors: Rao S. Peddada, Frank Lili Wei
  • Patent number: 11169388
    Abstract: A laser beam apparatus can include a set of pulsed lasers (e.g. solid state fiber lasers), a controllable beam deflector, and an electric power supply and controller connected to the beam deflector. The laser pulses from the different pulsed lasers can be configured to hit the beam deflector at different angles and different times. The electric power supply and controller can be configured to control and synchronize the timing and angle at which the different lasers pulses hit the beam deflector with an adjustment of the deflection property of the beam deflector so that the laser pulses from different input directions propagate in the same direction after passing through the beam deflector. The laser pulses from the lasers can be combined together via this control and synchronization.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: November 9, 2021
    Assignee: The Penn State Research Foundation
    Inventor: Shizhuo Yin
  • Patent number: 11133651
    Abstract: A nitride semiconductor laser device at least includes a ridge part disposed on a second-conductivity-type semiconductor layer, a conductive oxide layer covering the upper surface of the ridge part and portions of opposite side surfaces of the ridge part, a dielectric layer covering a portion of the conductive oxide layer, and a first metal layer covering the conductive oxide layer and the dielectric layer, wherein a portion of the conductive oxide layer disposed on the upper surface of the ridge part is exposed through the dielectric layer and covered with the first metal layer.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: September 28, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Akinori Noguchi, Yoshihiko Tani, Yoshimi Tanimoto, Yuhzoh Tsuda
  • Patent number: 11119384
    Abstract: Disclosed are methods and apparatus for hermetically sealing a nonlinear optical (NLO) crystal for use in a laser system. A mounted NLO crystal, an enclosure base, a lid, and a plurality of window components are moved into an oven. A vacuum bake process is then performed on the mounted NLO crystal, enclosure base, lid, and plurality of window components until a humidity level that is less than a predefined amount is reached. The mounted NLO crystal, enclosure base, lid, and plurality of window components are moved from the oven onto a stage of a glove box that includes a sealing tool. In the glove box, the mounted NLO crystal is hermetically sealed into the enclosure base by sealing the lid and plurality of window components into openings of the enclosure base.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: September 14, 2021
    Assignee: KLA-Tencor Corporation
    Inventors: Rajeev Patil, David Ramirez, Yevgeniy Churin, William Replogle
  • Patent number: 11112069
    Abstract: A light emitting device includes a base; a plurality of semiconductor laser elements disposed on the base and configured to emit light laterally from the plurality of semiconductor laser elements; a reflecting member disposed on the base and configured to reflect light from the semiconductor laser elements; a surrounding part disposed on the base and surrounding the semiconductor laser elements and the reflecting member; a wiring part disposed on the base so as to extend to a location outside of the surrounding part; a radiating body disposed on the surrounding part and having an opening; and a wavelength converting member that is located in the opening of the radiating body, the wavelength converting member being configured to convert a wavelength of light that is emitted from the plurality of semiconductor laser elements and reflected upward by the reflecting member.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: September 7, 2021
    Assignee: Nichia Corporation
    Inventors: Kazuma Kozuru, Shinichi Nagahama
  • Patent number: 11105861
    Abstract: Disclosed is a battery resistance estimation apparatus.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: August 31, 2021
    Assignee: LG Chem, Ltd.
    Inventor: Bo-Kyung Seo
  • Patent number: 11050219
    Abstract: A laser device has a photonic crystal surface emitting laser (PCSEL) element. At a first lateral side of the PCSEL element, a reflector is arranged to reflect back into the PCSEL element at least a portion of light travelling out of the PCSEL element through the first lateral side of the PCSEL element. Between the first lateral side of the PCSEL element and the reflector there is interposed an electrically controllable light-transmission region configured to control the transmission of light from the PCSEL element to the reflector, based on an electrical input. Also disclosed is a method of operation of a corresponding laser device.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: June 29, 2021
    Assignee: The University Court of the University of Glasgow
    Inventors: Richard Hogg, David Childs, Richard Taylor
  • Patent number: 11018013
    Abstract: A semiconductor device manufacturing method includes: forming an electrode including an Ni layer and an Au layer successively stacked on a semiconductor layer; forming a Ni oxide film by performing heat treatment to the electrode at a temperature of 350° C. or more to deposit Ni at least at a part of a surface of the Au layer and to oxidize the deposited Ni; and forming an insulating film in contact with the Ni oxide film and containing Si.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: May 25, 2021
    Assignee: SUMITOMO ELECTRIC DEVICE INNOVATIONS, INC.
    Inventor: Yukinori Nose
  • Patent number: 11016378
    Abstract: The present invention is directed to a laser light source.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: May 25, 2021
    Assignee: KYOCERA SLD Laser, Inc.
    Inventors: James W. Raring, Paul Rudy
  • Patent number: 11005005
    Abstract: An optoelectronic semiconductor device and a method for manufacturing an optoelectronic semiconductor device are disclosed. In an embodiment an optoelectronic semiconductor device includes a semiconductor body comprising a first region of a first conductive type, an active region, a second region of a second conductive type and a coupling-out surface, wherein the first region, the active region and the second region are arranged along a stacking direction, wherein the active region extends from a rear surface opposite the coupling-out surface to the coupling-out surface along a longitudinal direction transverse to or perpendicular to the stacking direction, wherein the coupling-out surface is arranged plane-parallel to the rear surface, and wherein the coupling-out surface and the rear surface of the semiconductor body are produced by an etching process.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 11, 2021
    Assignee: OSRAM OLED GMBH
    Inventors: Harald König, Jens Ebbecke, Alfred Lell, Sven Gerhard, Clemens Vierheilig
  • Patent number: 10998246
    Abstract: Reliability of a semiconductor device is improved. A method of manufacturing a semiconductor device includes a step of preparing a lead frame in which a plurality of device forming regions are arranged in a matrix, a die bonding step of mounting a semiconductor chip on each device region, a resin sealing step of individually covering each semiconductor chip with a sealing body, and a lead plating step of plating an outer portion of a lead exposed from the sealing body. Between the resin sealing step and the lead plating step, an inspection step for detecting defective products in the resin sealing step and a defective product removal step for removing a device region of defective products are provided.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: May 4, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Noriaki Mineta
  • Patent number: 10985529
    Abstract: A semiconductor laser diode includes a semiconductor layer sequence with an active layer having a main extension plane and that generates light in an active region and emits light via a light outcoupling surface during operation, wherein the active region extends from a rear surface opposite the light outcoupling surface to the light outcoupling surface along a longitudinal direction, the semiconductor layer sequence includes a trench structure having at least one trench or a plurality of trenches on at least one side laterally next to the active region, and each trench of the trench structure extends in a longitudinal direction and projects from a top side of the semiconductor layer sequence in a vertical direction into the semiconductor layer sequence, and the trench structure varies in a lateral and/or vertical and/or longitudinal direction with respect to properties of the at least one trench or the plurality of trenches.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: April 20, 2021
    Assignee: OSRAM OLED GmbH
    Inventors: Sven Gerhard, Christoph Eichler, Alfred Lell, Bernhard Stojetz
  • Patent number: 10971897
    Abstract: A semiconductor laser device includes: a first conductivity side semiconductor layer, an active layer; and a second conductivity side semiconductor layer. The second conductivity side semiconductor layer includes a first semiconductor layer and a second semiconductor layer, the first semiconductor layer being closer to the active layer than the second semiconductor layer is. The second semiconductor layer defines a width of a current injection region for injecting current into an optical waveguide. The current injection region includes a width varying region in which a width varies. S1>S2, where S1 denotes a width of the width varying region on a front end face side, and S2 denotes a width of the width varying region on a rear end face side.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: April 6, 2021
    Assignee: PANASONIC SEMICONDUCTOR SOLUTIONS CO., LTD.
    Inventors: Norio Ikedo, Tougo Nakatani, Takahiro Okaguchi, Takeshi Yokoyama, Tomohito Yabushita, Toru Takayama
  • Patent number: 10938181
    Abstract: A vertical cavity surface emitting laser includes: an active layer including a quantum well structure including one or more well layers including a III-V compound semiconductor containing indium as a group III constituent element; an upper laminated region containing a carbon dopant; and a substrate for mounting a post including the active layer and the upper laminated region, in which the active layer is provided between the upper laminated region and the substrate, the quantum well structure has a carbon concentration of 2×1016 cm?3 or less, and the upper laminated region includes a pile-up layer of indium at a position away from the active layer.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: March 2, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kei Fujii, Takamichi Sumitomo, Suguru Arikata
  • Patent number: 10923883
    Abstract: An optical device includes a rectangular parallelepiped prism including a reflection-transmission surface for reflecting and transmitting light fluxes, a seating surface provided so that a bottom surface of the prism is fixed by an adhesive, and a groove portion provided in a part of the periphery of the seating surface. When the prism is fixed to the seating surface by the adhesive, the groove portion is configured to be capable of receiving the adhesive protruded from between the bottom surface of the prism and the seating surface when the prism is pressed against a first positioning member for determining a position of the prism so that a first side face of the prism is along a predetermined straight line and against a second positioning member for restricting a second side face orthogonal to the first side face of the prism from moving in the direction of the straight line.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: February 16, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Tokiko Gotoh, Noboru Kusunose
  • Patent number: 10866343
    Abstract: An object to provide a photonic crystal capable of resonating light at more resonant frequencies within a particular frequency range. A plurality of photonic crystal structure formation bodies each including a plate-like member in which cyclic refractive index distribution is formed are provided so as to be spaced apart from each other in the thickness direction of the plate-like member, and the respective refractive index distributions of the plurality of photonic crystal structure formation bodies are set such that: at least one of the plurality of photonic crystal structure formation bodies resonates with light having at least two frequencies within the frequency range; and the two frequencies are different from resonant frequencies of at least one of the other photonic crystal structure formation bodies.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: December 15, 2020
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Susumu Noda, Ardavan Oskooi, Yoshinori Tanaka
  • Patent number: 10855056
    Abstract: A number of beams that can be coupled into an optical fiber can be increased using emitted beams having greater divergence, thus providing increased beam power. Alternatively, with a fixed number of emitters, total optical power can be maintained with fewer beams in an output beam with a smaller numerical aperture.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: December 1, 2020
    Assignee: nLIGHT, Inc.
    Inventors: Zhigang Chen, David Martin Hemenway, Manoj Kanskar
  • Patent number: 10833474
    Abstract: Laser diode submounts include a SiC substrate on which a thick conductive layer is supplied to use in mounting a laser diode. The thick conductive layer is typically gold or copper, and can be electrically coupled to a base laser that is used to define laser diode couplings.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: November 10, 2020
    Assignee: nLIGHT, Inc.
    Inventors: Manoj Kanskar, Zhigang Chen
  • Patent number: 10797197
    Abstract: A thin film, flexible optoelectronic device is described. In an aspect, a method for fabricating a single junction optoelectronic device includes forming a p-n structure on a substrate, the p-n structure including a semiconductor having a lattice constant that matches a lattice constant of substrate, the semiconductor including a dilute nitride, and the single-junction optoelectronic device including the p-n structure; and separating the single-junction optoelectronic device from the substrate. The dilute nitride includes one or more of GaInNAs, GaInNAsSb, alloys thereof, or derivatives thereof.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: October 6, 2020
    Assignee: ALTA DEVICES, INC.
    Inventors: Nikhil Jain, Brendan M. Kayes, Gang He
  • Patent number: 10784653
    Abstract: A laser bar includes a semiconductor layer including a plurality of layers and includes an active zone, wherein the active zone is arranged in an x-y-plane, laser diodes each form a mode space in an x-direction between two end faces, the mode spaces of the laser diodes are arranged alongside one another in a y-direction, a trench is provided in the semiconductor layer between two mode spaces, the trenches extend in the x-direction, and the trenches extend from a top side of the semiconductor layer in a z-direction to a predefined depth in the direction of the active zone.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: September 22, 2020
    Assignee: OSRAM OLED GmbH
    Inventors: Andreas Loeffler, Clemens Vierheilig, Sven Gerhard
  • Patent number: 10770866
    Abstract: A light emitting device includes a base defining a recess, a lid portion, first and second semiconductor laser elements, and a collimate lens. The lid portion covers the recess so that a hermetically sealed space is defined by the lid portion and the base, the lid portion having a bottom surface fixed to the base and a top surface opposite to the bottom surface. The first and second semiconductor laser elements are provided in the hermetically sealed space. The first and second semiconductor laser elements respectively irradiate first and second lights having first and second peak wavelengths in a visible range. The collimate lens is fixed on the top surface of the lid portion with an adhesive. The collimate lens has a plurality of lens portions including a first lens portion through which the first light passes, and a second lens portion through which the second light passes.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: September 8, 2020
    Assignee: NICHIA CORPORATION
    Inventors: Soichiro Miura, Kazuma Kozuru
  • Patent number: 10754222
    Abstract: A light steering apparatus is provided including a tunable laser source and a system including the light steering apparatus. The light steering apparatus includes the tunable laser source and a steering device. A plurality of laser beams having optical coherence with each other and output from the tunable laser source are incident onto the steering device, and the steering device includes a plurality of modulation units for beam steering.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: August 25, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Changgyun Shin, Dongjae Shin, Dongsik Shim, Changbum Lee
  • Patent number: 10707374
    Abstract: A method of forming a light emitting device includes forming a growth mask layer including openings on a doped compound semiconductor layer, forming first light emitting diode (LED) subpixels by forming a plurality of active regions and second conductivity type semiconductor material layers employing selective epitaxy processes, and transferring each first LED subpixel to a backplane. An anode contact electrode may be formed on the second conductivity type semiconductor material layers for redundancy. The doped compound semiconductor layer may be patterned with tapered sidewalls to enhance etendue. An optically clear encapsulation matrix may be formed on the doped compound semiconductor material layer to enhance etendue. Lift-off processes may be employed for the active regions. Cracking of the LEDs may be suppressed employing a thick reflector layer.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: July 7, 2020
    Assignee: GLO AB
    Inventors: Fariba Danesh, Benjamin Leung, Tsun Lau, Zulal Tezcan, Miao-Chan Tsai, Max Batres, Michael Joseph Cich
  • Patent number: 10707643
    Abstract: The purpose of the present invention is to provide a laser light source module that is capable of heat dissipation from a laser device and of suppressing the diffusion of a light beam due to the close arrangement of the laser device. The laser light source module comprises a stem that is a base plate and first and second laser assemblies disposed on the stem. Each of the laser assemblies comprises a multi-emitter LD bar that is a laser device emitting a laser light along an optical axis, and a holding member having a mounting surface parallel to the axis, the multi-emitter LD bar being mounted on the mounting surface. The first and second laser assemblies are positioned such that the optical axes of the assemblies are parallel to each other and that the mounting surfaces of the assemblies are arranged opposite to each other in parallel.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: July 7, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Daisuke Morita, Kazutaka Ikeda, Motoaki Tamaya
  • Patent number: RE48880
    Abstract: A method of manufacturing a laser diode array capable of inhibiting electric cross talk is provided. The method of manufacturing a laser diode array includes a processing step of forming a peel layer containing an oxidizable material and a vertical resonator structure over a first substrate sequentially from the first substrate side by crystal growth, and then selectively etching the peel layer and the vertical resonator structure to the first substrate, thereby processing into a columnar shape, a peeling step of oxidizing the peel layer from a side face, and then peeling the vertical resonator structure of columnar shape from the first substrate, and a rearrangement step of jointing a plurality of vertical resonator structures of columnar shape obtained by the peeling step to a surface of a metal layer of a second substrate formed with the metal layer on the surface.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: January 4, 2022
    Assignee: Sony Group Corporation
    Inventors: Osamu Maeda, Masaki Shiozaki, Takahiro Arakida