Patents by Inventor Jian-Yu Liu
Jian-Yu Liu 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).
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Patent number: 11942563Abstract: A manufacturing method of a chip package includes patterning a wafer to form a scribe trench, in which a light-transmissive function layer below the wafer is in the scribe trench, the light-transmissive function layer is between the wafer and a carrier, and a first included angle is formed between an outer wall surface and a surface of the wafer facing the light-transmissive function layer; cutting the light-transmissive function layer and the carrier along the scribe trench to form a chip package that includes a chip, the light-transmissive function layer, and the carrier; and patterning the chip to form an opening, in which the light-transmissive function layer is in the opening, a second included angle is formed between an inner wall surface of the chip and a surface of the chip facing the light-transmissive function layer, and is different from the first included angle.Type: GrantFiled: June 1, 2023Date of Patent: March 26, 2024Assignee: XINTEC INC.Inventors: Chia-Sheng Lin, Hui-Hsien Wu, Jian-Hong Chen, Tsang-Yu Liu, Kuei-Wei Chen
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Publication number: 20240071776Abstract: A chip packaging structure and a method for fabricating the same are provided. The chip package structure includes a conductive substrate, a dam and a metal shielding layer. The conductive substrate includes a substrate, vias and electrodes. The substrate has first and second board surfaces opposite to each other. The vias penetrate through the first board surface and the second board surface, and a part of the vias is disposed in a first die-bonding region on which a chip is to be arranged. The electrodes extend from the first board surface to the second board surface through the vias. The dam is formed on the first board surface to surround the first die-bonding region, and the dam has a height higher than that of the chip. The metal shielding layer covers the dam and a part of the first board surface that do not overlap with the electrodes.Type: ApplicationFiled: December 2, 2022Publication date: February 29, 2024Inventors: DEI-CHENG LIU, CHIA-SHUAI CHANG, MING-YEN PAN, JIAN-YU SHIH, JHIH-WEI LAI, SHIH-HAN WU
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Publication number: 20100322269Abstract: A tunable laser has a gain material and a mirror defining an external resonant cavity. A tunable Fabry-Perot etalon disposed along the optical path between the mirror and the gain material includes a liquid crystal layer having a variable refractive index to tune the transmission peaks of the etalon and the resonant frequency of the laser resonant cavity. A second etalon having a fixed set of transmission peaks can also be included in the laser resonant cavity. The tunable etalon is then tuned to select a resonant frequency corresponding to one of the transmission peaks of the fixed etalon.Type: ApplicationFiled: June 17, 2009Publication date: December 23, 2010Applicant: COGO OPTRONICS, INC.Inventor: Jian-Yu Liu
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Patent number: 6847786Abstract: A wavelength division multiplexing/demultiplexing device is presented utilizing a polarization-based filter to separate odd and even wavelengths, or upper and lower channels of an input optical signal. The wavelength filter first converts the input signal to a predetermined polarization. A series of birefringent waveplates provide a polarization-dependent optical transmission function such that the polarized beam is decomposed into a first beam component carrying the first spectral band at a first polarization and a second beam component carrying the second spectral band at a second, orthogonal polarization. A beam displacer spatially separates the beam components into a pair of orthogonally-polarized beams. A quarter-wave plate converts these orthogonally-polarized beams into a pair of circularly-polarized beams, which are reflected by a mirror back along parallel optical paths through the quarter-wave plate, beam displacer, and waveplates.Type: GrantFiled: December 4, 2000Date of Patent: January 25, 2005Assignee: EC-Optics Technology, Inc.Inventors: Charles Wong, Leo Yu-Yu Lin, Jian-Yu Liu
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Patent number: 6600582Abstract: An optical add/drop wavelength switch is controllably changed from a bridge state, in which output is identical to input, e.g. a Wavelength Division Multiplexed (WDM) input, and an add/drop state, In which a signal input to an add port is substituted for a particular wavelength subrange of the WDM input, other wavelengths of the WDM input being unchanged. In one embodiment, the wavelength subrange of the WDM signal is given a polarization different from other wavelengths of the WDM, such as by using a stacked waveplate or other optical filter or polarization discriminator. The differently-polarized wavelengths can the be spatially separated, e.g. by a birefringent element or a polarization beam splitter, preferably In a bit-controlled fashion, such as by using a liquid crystal or other polarization controller. Polarization controllers and discriminators can be used similarly to selectably align or combine the add signal with the portion of the WDM signal outside the subrange.Type: GrantFiled: November 17, 2000Date of Patent: July 29, 2003Assignee: Chorum Technologies LPInventors: Jian-Yu Liu, Kuang-Yi Wu
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Patent number: 6552833Abstract: An optical wavelength division multiplex (WDM) demultiplexer can be provided in substantially passive form. In one embodiment a wavelength filter separates alternate channels to provide a first output containing even-numbered channels and a second output containing odd-numbered channels, each output having channels separated by a bandwidth twice the channel separation bandwidth of the original WDM signal.Type: GrantFiled: May 23, 2001Date of Patent: April 22, 2003Assignee: Macro-Vision Communications, Inc.Inventors: Jian-Yu Liu, Kuang-Yi Wu, Charles Wong
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Patent number: 6545779Abstract: A system for dealing with faults in wavelength division multiplexed (WDM) optical communications between two terminals connected by at least two optical fibers monitors the status of communications over both optical fibers. If both optical fibers are operating normally, a first set of channels is routed over the first optical fiber and a second set of channels (which is mutually exclusive of the first set of channels) is routed over the second optical fiber. However, if a fault is detected in either optical fiber, the first terminal combines the first and second sets of channels and routes the combined channels over the remaining optical fiber to the second terminal. The second terminal separates the combined channels to recreate the first and second sets of channels. Wavelength slicers can be used to multiplex and demultiplex the channels at both terminals. This architecture allows the first and second sets of channels to be interdigitally spaced.Type: GrantFiled: July 26, 2000Date of Patent: April 8, 2003Assignee: Chorum Technologies LPInventors: Jian-Yu Liu, Kuang-Yi Wu
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Patent number: 6545783Abstract: An optical wavelength add/drop multiplexer provides communications between two optical links supporting wavelength division multiplexing (WDM). A wavelength slicer spatially separates the input signal into two sets of channels. An optical filter, such as an interference filter, spatially separates the a subset of the input channels into an array of separated channels. A programmable optical add/drop switch array selectively routes channels from an array of input ports to an array of drop ports, substitutes channels from an array of add ports in place of the dropped channels, and routes the remaining input channels and added channels to an array of output ports. The channels from the output ports of the said add/drop switch array are then combined and transmitted into the second optical link.Type: GrantFiled: March 22, 1999Date of Patent: April 8, 2003Assignee: Chorum Technologies LPInventors: Kuang-Yi Wu, Jian-Yu Liu
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Publication number: 20030030881Abstract: An optical device comprises a first birefringent crystal having a first length, a second birefringent crystal having a second length, and a dynamic polarization rotator. An optical signal propagating through the first and second birefringent crystals has an effective optical path length based, at least in part, upon the first length of the first birefringent crystal and the second length of the second birefringent crystal. The dynamic polarization rotator adjusts the effective optical path length of the optical signal in response to a control signal.Type: ApplicationFiled: August 3, 2001Publication date: February 13, 2003Applicant: Chorum Technologies LPInventors: Tiejun Xia, Chi-Hao Cheng, Shuxin Li, Jian-Yu Liu, Kuang-Yi Wu
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Patent number: 6519060Abstract: An optical wavelength add/drop multiplexer provides communications between two optical links supporting wavelength division multiplexing (WDM). A wavelength slicer spatially separates the input signal into two sets of channels. An optical filter, such as an interference filter, spatially separates the a subset of the input channels into an array of separated channels. A programmable optical add/drop switch array selectively routes channels from and array of input ports to an array of drop ports, substitutes channels from an array of add ports in place of the dropped channels, and routes the remaining input channels and added channels to an array of output ports. The channels from the output ports of the said add/drop switch array are then combined and transmitted into the second optical link.Type: GrantFiled: June 4, 1999Date of Patent: February 11, 2003Assignee: Chorum Technologies LPInventor: Jian-Yu Liu
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Patent number: 6519022Abstract: An optical routing switch uses two liquid crystal cells that can produce offsetting rotations of the polarization of the input beam to provide fast, symmetrical switching. The input beam is first polarized and then passes through both liquid crystal cells in series. Both liquid crystal cells have two states (e.g., voltage-off and voltage-on) in which the beam polarization is rotated by predetermined angles (e.g., 0° and 90°), but in opposing rotational directions. A controller selectively rotates the LC cells through a sequence of steps, beginning with a “through” state in which both LC cells are in the first state. The polarization rotations provided by both liquid crystal cells offset one another so the beam polarization remains essentially unchanged. The LC cells can be rapidly switched to a “cross” state in which only one of the LC cells is changed to the second state and the polarization of the beam is rotated by a predetermined degree.Type: GrantFiled: July 21, 2000Date of Patent: February 11, 2003Assignee: Chorum Technologies LPInventors: Ming Xu, Chongchang Mao, Kuang-Yi Wu, Jian-Yu Liu
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Patent number: 6515786Abstract: An optical device comprises a first birefringent crystal having a first length, a second birefringent crystal having a second length, and a dynamic polarization rotator. An optical signal propagating through the first and second birefringent crystals has an effective optical path length based, at least in part, upon the first length of the first birefringent crystal and the second length of the second birefringent crystal. The dynamic polarization rotator adjusts the effective optical path length of the optical signal in response to a control signal.Type: GrantFiled: August 3, 2001Date of Patent: February 4, 2003Assignee: Chorum Technologies LPInventors: Tiejun Xia, Chi-Hao Cheng, Shuxin Li, Jian-Yu Liu, Kuang-Yi Wu
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Patent number: 6512615Abstract: A wavelength division multiplexing/demultiplexing device is presented utilizing a polarization-based filter to obtain a flat-top filter response which can be utilized to create a flat-top slicer which separates out odd and even wavelengths, or upper and lower channels of an input signal. The polarization-based filter provides superior peak flatness and isolation for narrow channel spacings over what can be obtained in traditional interferometric devices. The flat-top slicer can be used as the first stage of a cascade of WDM devices in which following stages can be based on polarization-based filters or traditional interferometric WDM devices, which are adequate due to the increased channel spacing obtained in the first stage of the cascade.Type: GrantFiled: December 18, 2000Date of Patent: January 28, 2003Assignee: Chorum Technologies LPInventors: Kuang-Yi Wu, Jian-Yu Liu
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Patent number: 6510004Abstract: A temperature insensitive polarization filter is made by inter-digitally stacking two different types of birefringent elements having positive and negative thermal coefficients. This results in a net cancellation of the positive and negative thermal coefficients of the birefringent elements within the filter. The optical retardance of each type of birefringent element changes by an almost equal amount as the operating temperature changes, with one type of element shifting toward a larger optical retardance and the other type of element shifting toward a smaller optical retardance. However, the total retardance remains essentially constant. This assures that the filter can operate over a wide temperature range without shifting its spectral response.Type: GrantFiled: February 9, 1998Date of Patent: January 21, 2003Assignee: Chorum Technologies LPInventors: Kuang-Yi Wu, Jian-Yu Liu
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Patent number: 6489783Abstract: A time dependent dielectric breakdown (TDDB) test device is used for testing a dielectric layer to obtain a time to failure (TTF) data, wherein the TDDB test device is electrically connected between a power source and a current detector and the dielectric layer includes at least a first capacitor and a second capacitor formed about selected first and second locations of the dielectric layer. The device includes a first current-limiting apparatus electrically connected to the first capacitor in series, a second current-limiting apparatus electrically connected to the second capacitor in series and the first current-limiting apparatus in parallel, and a voltage-regulating apparatus electrically connected to the second current-limiting apparatus in series. It also provides a method for implementing such device.Type: GrantFiled: November 17, 2000Date of Patent: December 3, 2002Assignee: Winbond Electronics Corp.Inventors: Jian-Yu Liu, Ming-Yi Lay
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Publication number: 20020163691Abstract: A wavelength division multiplexing/demultiplexing device is presented utilizing a polarization-based filter to separate odd and even wavelengths, or upper and lower channels of an input optical signal. The wavelength filter first converts the input signal to a predetermined polarization. A series of birefringent waveplates provide a polarization-dependent optical transmission function such that the polarized beam is decomposed into a first beam component carrying the first spectral band at a first polarization and a second beam component carrying the second spectral band at a second, orthogonal polarization. A beam displacer spatially separates the beam components into a pair of orthogonally-polarized beams. A quarter-wave plate converts these orthogonally-polarized beams into a pair of circularly-polarized beams, which are reflected by a mirror back along parallel optical paths through the quarter-wave plate, beam displacer, and waveplates.Type: ApplicationFiled: December 4, 2000Publication date: November 7, 2002Inventors: Charles Wong, Leo Yu-Yu Lin, Jian-Yu Liu
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Patent number: 6452702Abstract: An optical routing switch provides polarization-independent and low-crosstalk switching between any of a plurality of input ports and any of a plurality of output ports over a wide operating range of temperatures and wavelengths. Optical signals appearing at each input port are spatially decomposed into two orthogonally-polarized beams by a first polarization-dependent routing element (e.g., a birefringent element or polarized beamsplitter). Beyond this point, a network of optical switches are placed along the optical paths of the pair of light beams. Each optical switch includes: (1) a polarization rotator that switchably controls the polarization of the input light beams so that both of the emergent beams are either vertically or horizontally polarized, according to the control state of the device; and (2) a polarization-dependent routing element that spatially routes the light beam pair to provide physical displacement based on their state of polarization.Type: GrantFiled: April 10, 2000Date of Patent: September 17, 2002Assignee: Chorum Technologies LPInventors: Kuang-Yi Wu, Jian-Yu Liu
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Patent number: 6429962Abstract: An optical equalizer for use primarily with an erbium-doped fiber amplifier has an initial polarizer that convert the input beam to a predetermined polarization, followed by a series of dynamically-adjustable sinusoidal filters that provide attenuation as a sinusoidal function of beam wavelength. Each of the sinusoidal filters has a first liquid crystal cell adjustably rotating the polarization of the beam from the preceding polarizer. This is followed by a second optical element that retards the beam as a sinusoidal function of beam wavelength. For example, the second optical element can be a birefringent crystal that provided a fixed degree of retardance to the beam and a second liquid crystal cell that provides a variable degree of retardance, thereby allowing adjustment of the center frequency of the sinusoidal function. Finally, a third liquid crystal cell adjustably rotates the polarization of the beam.Type: GrantFiled: December 5, 2000Date of Patent: August 6, 2002Assignee: Chorum Technologies LPInventors: Ming Xu, Tizhi Huang, Chongchang Mao, Jian-Yu Liu, Kuang-Yi Wu, Charles Wong
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Patent number: 6426816Abstract: The inventive filter forms a four filtering stage device from two filtering stages and a reflective stage. This greatly reduces the noise level in a WDM signal, wherein the signal is one of the odd channels and the even channels, while the noise is present on the other of the odd channels and the even channels. The first stage separates the WDM signal and noise into their polarization components, rotates the components of one of the signal and the noise, and recombines the components of the signal, while blocking a portion of the noise. This output is passed to the second stage which repeats the operation of the first stage. The output of the second stage is then reflected by the reflecting stage back to the second stage, and subsequently the first stage, for processing in reverse order. The inventive filter, via the mirror in the reflecting stage, reduce dispersion of the light during processing.Type: GrantFiled: July 12, 2000Date of Patent: July 30, 2002Assignee: Chorum Technologies, LPInventors: Kuang-Yi Wu, Charles Wong, Jian-Yu Liu, Ye Li
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Publication number: 20020093725Abstract: An optical equalizer for use primarily with an erbium-doped fiber amplifier has an initial polarizer that convert the input beam to a predetermined polarization, followed by a series of dynamically-adjustable sinusoidal filters that provide attenuation as a sinusoidal function of beam wavelength. Each of the sinusoidal filters has a first liquid crystal cell adjustably rotating the polarization of the beam from the preceding polarizer. This is followed by a second optical element that retards the beam as a sinusoidal function of beam wavelength. For example, the second optical element can be a birefringent crystal that provided a fixed degree of retardance to the beam and a second liquid crystal cell that provides a variable degree of retardance, thereby allowing adjustment of the center frequency of the sinusoidal function. Finally, a third liquid crystal cell adjustably rotates the polarization of the beam.Type: ApplicationFiled: December 5, 2000Publication date: July 18, 2002Inventors: Ming Xu, Tizhi Huang, Chongchang Mao, Jian-Yu Liu, Kuang-Yi Wu, Charles Wong