Patents by Inventor Tokuhiko Tamaki

Tokuhiko Tamaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10819924
    Abstract: An electronic device including: a photosensitive layer that converts incident light into a signal charge; a first electrode that collects the signal charge; and a first carrier blocking layer between the photosensitive layer and the first electrode. The carrier blocking layer is configured to block a carrier a polarity of which is different from that of the signal charge. Under a first range of biases on the electronic device, the photosensitive layer is configured to generate photocurrent while illuminated. Under a second range of biases on the electronic device, the photosensitive layer is configured to generate lower photocurrent while illuminated compared to under the first range of biases.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: October 27, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yasuo Miyake, Masashi Murakami, Tokuhiko Tamaki, Yoshiaki Satou
  • Patent number: 10818707
    Abstract: A solid-state imaging device includes: pixels arranged in a matrix; a vertical signal line provided for each column, conveying a pixel signal; a power line provided for each column, proving a power supply voltage; and a feedback signal line provided for each column, conveying a signal from a peripheral circuit to a pixel, in which each of the pixels includes: an N-type diffusion layer; a photoelectric conversion element above the N-type diffusion layer; and a charge accumulation node between the N-type diffusion layer and the photoelectric conversion element, accumulating signal charge generated in the photoelectric conversion element, the feedback signal line, a metal line which is a part of the charge accumulation node, the vertical signal line, and the power line are disposed in a second interconnect layer, and the vertical signal line and the power line are disposed between the feedback signal line and the metal line.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: October 27, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tokuhiko Tamaki, Hirohisa Ohtsuki, Ryohei Miyagawa, Motonori Ishii
  • Publication number: 20200303436
    Abstract: An imaging device includes a photoelectric conversion layer having a first surface and a second surface opposite to the first surface; a counter electrode on the first surface; a first electrode on the second surface; a second electrode on the second surface, the second electrode being spaced from the first electrode; and an auxiliary electrode on the second surface between the first electrode and the second electrode. The auxiliary electrode is spaced from the first electrode and the second electrode, where a shortest distance between the first electrode and the auxiliary electrode is different from a shortest distance between the second electrode and the auxiliary electrode.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Inventors: Masayuki TAKASE, Takayoshi YAMADA, Tokuhiko TAMAKI
  • Patent number: 10741600
    Abstract: An imaging device including a semiconductor substrate; and a pixel. The pixel includes a photoelectric converter having a first electrode, a second electrode and a photoelectric conversion layer sandwiched between the first electrode and the second electrode, the photoelectric converter located above a surface of the semiconductor substrate; a first transistor that includes a part of the semiconductor substrate and detects electric charges; and a second transistor that includes a gate electrode and initializes a voltage of the first electrode. The first electrode, the second transistor, and the first transistor are arranged in that order toward the semiconductor substrate from the first electrode in cross sectional view, and when viewed from the direction normal to the surface of the semiconductor substrate, a part of the gate electrode overlaps the first electrode, and another part of the gate electrode does not overlap the first electrode.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: August 11, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tokuhiko Tamaki, Junji Hirase, Shigeo Yoshii
  • Publication number: 20200243609
    Abstract: A photosensor including: a first electrode; a second electrode; a photoelectric conversion layer between the first electrode and the second electrode; a first charge blocking layer between the first electrode and the photoelectric conversion layer; a second charge blocking layer between the second electrode and the photoelectric conversion layer; a voltage supply circuit supplying a voltage to the second electrode such that an electric field directed from the second electrode toward the first electrode is generated in the photoelectric conversion layer; and a transistor. The first charge blocking layer suppresses movement of holes from the photoelectric conversion layer to the first electrode and movement of electrons from the first electrode to the photoelectric conversion layer, and the second charge blocking layer suppresses movement of electrons from the photoelectric conversion layer to the second electrode and movement of holes from the second electrode to the photoelectric conversion layer.
    Type: Application
    Filed: April 15, 2020
    Publication date: July 30, 2020
    Inventors: Takeyoshi TOKUHARA, Tokuhiko TAMAKI
  • Patent number: 10720457
    Abstract: An imaging device includes a pixel comprising a photoelectric conversion layer having a first surface and a second surface opposite to the first surface; a pixel electrode on the first surface; an auxiliary electrode on the first surface, the auxiliary electrode being spaced from the pixel electrode; an upper electrode on the second surface, the upper electrode facing the pixel electrode and the auxiliary electrode; and an amplification transistor having a gate coupled to the pixel electrode. The imaging device also includes voltage application circuitry that generates a first voltage and a second voltage different from the first voltage, the voltage application circuitry being coupled to the auxiliary electrode. The voltage application circuitry selectively supplies either the first voltage or the second voltage to the auxiliary electrode.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 21, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Masayuki Takase, Takayoshi Yamada, Tokuhiko Tamaki
  • Publication number: 20200177787
    Abstract: An imaging device includes a pixel including a photoelectric converter, where the pixel captures first data in a first exposure period and captures second data in a second exposure period different from the first exposure period, the first exposure period and the second exposure period being included in a frame period. A sensitivity of the photoelectric converter in the first exposure period is different from a sensitivity of the photoelectric converter in the second exposure period, and the imaging device generates multiple-exposure image data including at least the first data and the second data.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 4, 2020
    Inventors: Yoshiaki SATOU, Yasuo MIYAKE, Yasunori INOUE, Tokuhiko TAMAKI
  • Patent number: 10658430
    Abstract: A photosensor includes: a first electrode; a second electrode; a photoelectric conversion layer that is located between the first and second electrodes and generates electric charges; a first charge blocking layer located between the first electrode and the photoelectric conversion layer; a second charge blocking layer located between the second electrode and the photoelectric conversion layer; a voltage supply circuit that applies a voltage to at least one of the first and second electrodes such that an electric field is generated in the photoelectric conversion layer; and a detection circuit that detects a signal corresponding to a change in capacitance between the first and second electrodes. The first charge blocking layer suppresses movement of electric charges between the photoelectric conversion layer and the first electrode. The second charge blocking layer suppresses movement of electric charges between the photoelectric conversion layer and the second electrode.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: May 19, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takeyoshi Tokuhara, Tokuhiko Tamaki
  • Patent number: 10594948
    Abstract: An imaging device includes a unit pixel cell. The unit pixel cell captures first data in a first exposure period and captures second data in a second exposure period different from the first exposure period, the first exposure period and the second exposure period being included in a frame period. A sensitivity per unit time of the unit pixel cell in the first exposure period is different from a sensitivity per unit time of the unit pixel cell in the second exposure period. The imaging device outputs multiple-exposure image data including at least the first data and the second data.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: March 17, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshiaki Satou, Yasuo Miyake, Yasunori Inoue, Tokuhiko Tamaki
  • Patent number: 10535827
    Abstract: An optical sensor includes a semiconductor layer including a first region, a second region, and a third region between the first region and the second region, a first electrode, a photoelectric conversion layer between the third region and the first electrode, and voltage supply circuitry applying a voltage between the first electrode and the first region to apply a bias voltage to the photoelectric conversion layer. The photoelectric conversion layer has a characteristic showing how a density of current flowing through the photoelectric conversion layer varies with the bias voltage applied to the photoelectric conversion layer. The characteristic includes a third voltage range where an absolute value of a rate of change of the current density relative to the bias voltage is less than in a first voltage range and a second voltage range, the third voltage range being between the first voltage range and the second voltage range.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: January 14, 2020
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Tokuhiko Tamaki
  • Patent number: 10490591
    Abstract: An imaging device includes: a semiconductor substrate; a photoelectric conversion element that, in operation, generates a signal by performing photoelectric conversion on incident light; a multilayer wiring structure including a first wiring layer and a second wiring layer which are provided between the semiconductor substrate and the photoelectric conversion element; and a circuitry that is provided in the semiconductor substrate and the multilayer wiring structure, and, in operation, processes the signal. The circuitry includes a first transistor and a first capacitance element. The first transistor includes a first gate, and a first source region and a first drain region which are provided in the semiconductor substrate. The first capacitance element includes a first electrode, a second electrode, and a dielectric film disposed between the first electrode and the second electrode. The first electrode is disposed between the photoelectric conversion element and the first gate of the first transistor.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 26, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuuko Tomekawa, Tokuhiko Tamaki
  • Patent number: 10453899
    Abstract: A photodetector includes: a semiconductor substrate including first and second impurity regions; a gate insulating layer located on a region of the semiconductor substrate, the region being between the first and second impurity regions, the gate insulating layer including a photoelectric conversion layer; a gate electrode located on the gate insulating layer and having a light-transmitting property; a first charge transfer channel transferring signal charges corresponding to a current occurring between the first impurity region and the second impurity region depending on a change in a dielectric constant of the photoelectric conversion layer caused by light incidence on the photoelectric conversion layer; a second charge transfer channel diverging from the first charge transfer channel; a first charge storage storing charges, among the signal charges, transferred via the second charge transfer channel; and a first gate switching transfer and shutdown of charges passing through the second charge transfer chann
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 22, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naoki Shimasaki, Tokuhiko Tamaki, Sanshiro Shishido
  • Publication number: 20190313040
    Abstract: An imaging device comprising: a first pixel cell including a first photoelectric converter generating a first signal, the first photoelectric converter including a first electrode and a first photoelectric conversion region on the first electrode, and a first circuit coupled to the first electrode and detecting the first signal; and a second pixel cell including a second photoelectric converter generating a second signal, the second photoelectric converter including a second electrode and a second photoelectric conversion region on the second electrode, and a second circuit coupled to the second electrode and detecting the second signal. A sensitivity of the first pixel cell is higher than that of the second pixel cell. A circuit configuration of the first circuit is different from that of the second circuit. The first circuit includes a feedback circuit configured to negatively feed back a voltage of the first electrode to the first electrode.
    Type: Application
    Filed: June 20, 2019
    Publication date: October 10, 2019
    Inventors: Kazuko NISHIMURA, Tokuhiko TAMAKI, Masashi MURAKAMI
  • Publication number: 20190313038
    Abstract: An electronic device including: a photosensitive layer that converts incident light into a signal charge; a first electrode that collects the signal charge; and a first carrier blocking layer between the photosensitive layer and the first electrode. The carrier blocking layer is configured to block a carrier a polarity of which is different from that of the signal charge. Under a first range of biases on the electronic device, the photosensitive layer is configured to generate photocurrent while illuminated. Under a second range of biases on the electronic device, the photosensitive layer is configured to generate lower photocurrent while illuminated compared to under the first range of biases.
    Type: Application
    Filed: June 18, 2019
    Publication date: October 10, 2019
    Inventors: Yasuo MIYAKE, Masashi MURAKAMI, Tokuhiko TAMAKI, Yoshiaki SATOU
  • Publication number: 20190260954
    Abstract: An imaging device includes: a first pixel including a first photoelectric converter that converts incident light into first signal charges, and a first charge storage node that accumulates the first signal charges; and a second pixel including a second photoelectric converter that converts incident light into second signal charges, and a second charge storage node that accumulates the second signal charges. An area of the second photoelectric converter is greater than an area of the first photoelectric converter in a plan view. Capacitance of the first charge storage node is greater than capacitance of the second charge storage node.
    Type: Application
    Filed: May 3, 2019
    Publication date: August 22, 2019
    Inventor: Tokuhiko TAMAKI
  • Publication number: 20190250042
    Abstract: An optical sensor including: a semiconductor layer including a source region and a drain region; a gate electrode facing a region between the source region and the drain region; a photoelectric conversion layer between the region and the gate electrode; and a first transistor having a first gate coupled to one of the source region and the drain region.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventors: Naoki SHIMASAKI, Tokuhiko TAMAKI, Sanshiro SHISHIDO
  • Patent number: 10375329
    Abstract: An imaging device including: unit pixel cells each including a first electrode, a second electrode, a photoelectric conversion layer, a charge accumulation region connected to the first electrode, and a signal detection circuit connected to the charge accumulation region; and a voltage supply circuit connected to the second electrode, the voltage supply circuit supplying a first voltage to the second electrode in a first period, the voltage supply circuit supplying a second voltage that is different from the first voltage to the second electrode in a second period. Each unit pixel cells includes a reset transistor which switches between supply and cutoff of a reset voltage initializing the charge accumulation region, and a potential difference between the first electrode and the second electrode when the reset voltage is supplied is greater than a potential difference between the first electrode and the second electrode after the reset voltage is cut off.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: August 6, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yasuo Miyake, Masashi Murakami, Tokuhiko Tamaki, Yoshiaki Satou
  • Patent number: 10375332
    Abstract: An imaging device includes: a first pixel cell including a first photoelectric converter that generates a first signal by photoelectric conversion, and a first signal detection circuit that is electrically connected to the first photoelectric converter and detects the first signal; and a second pixel cell including a second photoelectric converter that generates a second signal by photoelectric conversion, and a second signal detection circuit that is electrically connected to the second photoelectric converter and detects the second signal. A sensitivity of the first pixel cell is higher than a sensitivity of the second pixel cell. A circuit configuration of the first signal detection circuit is different from a circuit configuration of the second signal detection circuit.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: August 6, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Kazuko Nishimura, Tokuhiko Tamaki, Masashi Murakami
  • Patent number: 10367025
    Abstract: Each unit pixel includes a photoelectric converter, an n-type impurity region forming an accumulation diode together with the semiconductor region, the accumulation diode accumulating a signal charge generated by the photoelectric converter, an amplifier transistor including a gate electrode electrically connected to the impurity region, and an isolation region formed around the amplifier transistor and implanted with p-type impurities. The amplifier transistor includes an n-type source/drain region formed between the gate electrode and the isolation region, and a channel region formed under the gate electrode. A gap in the isolation region is, in a gate width direction, wider at a portion including the channel region than at a portion including the source/drain region.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: July 30, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshihiro Sato, Ryohei Miyagawa, Tokuhiko Tamaki, Junji Hirase, Yoshiyuki Ohmori, Yoshiyuki Matsunaga
  • Publication number: 20190214590
    Abstract: An optical sensor includes a semiconductor layer including a first region, a second region, and a third region between the first region and the second region, a first electrode, a photoelectric conversion layer between the third region and the first electrode, and voltage supply circuitry applying a voltage between the first electrode and the first region to apply a bias voltage to the photoelectric conversion layer. The photoelectric conversion layer has a characteristic showing how a density of current flowing through the photoelectric conversion layer varies with the bias voltage applied to the photoelectric conversion layer. The characteristic includes a third voltage range where an absolute value of a rate of change of the current density relative to the bias voltage is less than in a first voltage range and a second voltage range, the third voltage range being between the first voltage range and the second voltage range.
    Type: Application
    Filed: March 13, 2019
    Publication date: July 11, 2019
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Tokuhiko TAMAKI