Patents by Inventor Xia Li

Xia Li 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: 10522367
    Abstract: An integrated circuit (IC) device may include a substrate having an active device layer. The integrated circuit may also include a first defect layer. The first defect layer may have a first surface facing a backside of the active device layer. The integrated circuit may further include a second defect layer. The second defect layer may face a second surface opposite the first surface of the first defect layer.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: December 31, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Xia Li, Bin Yang, Gengming Tao
  • Publication number: 20190385947
    Abstract: A capacitor includes a first set of conductive fingers having a first conductive pitch at a first interconnect layer and arranged in a first unidirectional routing. The capacitor further includes a second set of conductive fingers having a second conductive pitch at a second interconnect layer and arranged in a second unidirectional routing that is orthogonal to the first unidirectional routing. The first conductive pitch is different from the second conductive pitch. A first set of through finger vias electrically couples the first set of conductive fingers of the first interconnect layer to the second set of conductive fingers of the second interconnect layer. A third set of conductive fingers at a third conductive layer are parallel to, but offset from, the first set of conductive fingers. A second set of through finger vias electrically couples the third set of conductive fingers to the second set of conductive fingers.
    Type: Application
    Filed: June 13, 2018
    Publication date: December 19, 2019
    Inventors: Xia LI, Junjing BAO, Bin YANG, Gengming TAO
  • Publication number: 20190386154
    Abstract: A variable capacitor includes a mesa on a substrate. The mesa has multiple III-V semiconductor layers and includes a first side and a second side opposite the first side. The first side has a first sloped portion and a first horizontal portion. The second side has a second sloped portion and a second horizontal portion. A control terminal is on a third side of the mesa. A first terminal is on the first side of the mesa. The first terminal is disposed on the first horizontal portion and the first sloped portion. A second terminal is also on the substrate.
    Type: Application
    Filed: June 13, 2018
    Publication date: December 19, 2019
    Inventors: Gengming TAO, Xia LI, Bin YANG, Qingqing LIANG, Francesco CAROBOLANTE
  • Publication number: 20190371895
    Abstract: Certain aspects of the present disclosure provide a semiconductor device. One example semiconductor device generally includes a substrate, a semiconductor region disposed adjacent to the substrate, first fin(s) disposed adjacent to the semiconductor region, first gate region(s) disposed adjacent to the first fin(s), first drain contact(s) disposed above the first fin(s), first source contact(s) disposed below the substrate, a second fin disposed above the semiconductor region, and a second gate region, second source contact and second drain contact disposed adjacent to the second fin and above the semiconductor region. First path(s) are formed between the first drain contact(s) and the first source contact(s) for current flow(s) through the first fin(s) in a vertical direction along the first path(s). A second path is formed between the second source contact and the second drain contact for current flow through the second fin in a horizontal direction along the second path.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 5, 2019
    Inventors: Xia LI, Gengming TAO, Bin YANG
  • Publication number: 20190363198
    Abstract: Certain aspects of the present disclosure provide a semiconductor variable capacitor. The semiconductor variable capacitor generally includes a first semiconductor region having a first doping type, a second semiconductor region having a second doping type different from the first doping type, a third semiconductor region disposed between the first semiconductor region and the second semiconductor region, a first terminal disposed adjacent to the first semiconductor region, a second terminal disposed adjacent to the second semiconductor region, and a third terminal disposed above the third semiconductor region. The first semiconductor region, the second semiconductor region, and/or the third semiconductor region include gallium nitride. The third semiconductor region includes multiple semiconductor layers having different materials.
    Type: Application
    Filed: May 25, 2018
    Publication date: November 28, 2019
    Inventors: Gengming TAO, Xia LI, Bin YANG, Periannan CHIDAMBARAM
  • Patent number: 10490639
    Abstract: In certain aspects, a heterojunction bipolar transistor (HBT) comprises a collector mesa, a base mesa on the collector mesa, and an emitter mesa on the base mesa. The base mesa has a tapered sidewall tapering from a wide bottom to a narrow top. The HBT further comprises a collector contact on a portion of the collector mesa and extending to a portion of the tapered sidewall of the base mesa.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: November 26, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Gengming Tao, Bin Yang, Xia Li
  • Patent number: 10482743
    Abstract: Systems, methods, apparatus and devices are described for monitoring a property of an object or an individual, using a conformal sensor device that substantially conforms to contours of a portion of a surface of the object or the individual. The measurement includes data indicative of a property of a temperature of the portion of the surface and the degree of the conformal contact. An analysis engine is used to analyze the data and to generate at least one parameter indicative of the property of the temperature. Based on a comparison of the at least one parameter to a preset threshold, at least one alert can be issued and/or a command can be transmitted to regulate an environmental condition. The at least one alert can be indicative of a potential risk of harm to the object or individual.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: November 19, 2019
    Assignee: MC10, INC.
    Inventors: Xia Li, Sanjay Gupta, Kevin J. Dowling, Isaiah Kacyvenski, Melissa Ceruolo, Barry G. Ives
  • Patent number: 10483287
    Abstract: Transistors formed on semiconductor substrates are not well-suited for integrated circuits employed in media designed to structurally flex to conform to a shaped surface or in response to physical stress. Structural flexing of wearable electronic devices, such as clothing, may cause cracking in the semiconductor substrate, resulting in failure of the integrated circuits. TFTs formed on flexible substrates can withstand structural flexing without failure. CMOS circuits are employed due to cost, performance, and power efficiency considerations. To provide increased drive strength for such applications, a flexible TFT structure for a CMOS circuit disclosed herein includes an exemplary NFET integrated with a complementary PFET on a flexible substrate. By forming a top gate on a semiconductor layer of a FET opposite to a bottom gate formed between the semiconductor layer and the flexible substrate, an effective thickness of an inversion channel layer induced in the semiconductor layer is doubled.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: November 19, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Bin Yang, Gengming Tao
  • Patent number: 10482929
    Abstract: Non-volatile (NV) memory (NVM) matrix circuits employing NVM circuits for performing matrix computations are disclosed. In exemplary aspects disclosed herein, an NVM matrix circuit is provided that has a plurality of NVM storage string circuits each comprising a plurality of NVM bit cell circuits each configured to store a memory state. Each NVM bit cell circuit has a stored memory state represented by a resistance, and includes a transistor whose gate node is coupled to a word line among a plurality of word lines configured to receive an input vector of 1×m size for example. Activation of the gate of a given NVM bit cell circuit controls whether its resistance is contributed to a respective source line. This causes a summation current to be generated on each source line based on the weighted summed contribution of each NVM bit cell circuit's resistance to its respective source line.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: November 19, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Bin Yang, Gengming Tao
  • Publication number: 20190348602
    Abstract: Double-patterned magneto-resistive random access memory (MRAM) for reducing magnetic tunnel junction (MTJ) pitch for increased MRAM bit cell density is disclosed. In one aspect, to fabricate MTJs in an MRAM array with reduced MTJ row pitch, a first patterning process is performed to provide separation areas in an MTJ layer between what will become rows of fabricated MTJs, which facilitates MTJs in a given row sharing a common bottom electrode. This reduces the etch depth and etching time needed to etch the individual MTJs in a subsequent step, can reduce lateral projections of sidewalls of the MTJs, thereby relaxing the pitch between adjacent MTJs, and may allow an initial MTJ hard mask layer to be reduced in height. A subsequent second patterning process is performed to fabricate individual MTJs. Additional separation areas are etched between free layers of adjacent MTJs in a given row to fabricate the individual MTJs.
    Type: Application
    Filed: July 26, 2019
    Publication date: November 14, 2019
    Inventors: Xia Li, Wei-Chuan Chen
  • Patent number: 10475889
    Abstract: Certain aspects of the present disclosure provide a semiconductor device. One example semiconductor device generally includes a substrate, a semiconductor region disposed adjacent to the substrate, first fin(s) disposed adjacent to the semiconductor region, first gate region(s) disposed adjacent to the first fin(s), first drain contact(s) disposed above the first fin(s), first source contact(s) disposed below the substrate, a second fin disposed above the semiconductor region, and a second gate region, second source contact and second drain contact disposed adjacent to the second fin and above the semiconductor region. First path(s) are formed between the first drain contact(s) and the first source contact(s) for current flow(s) through the first fin(s) in a vertical direction along the first path(s). A second path is formed between the second source contact and the second drain contact for current flow through the second fin in a horizontal direction along the second path.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: November 12, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Gengming Tao, Bin Yang
  • Publication number: 20190342106
    Abstract: Physically unclonable function (PUF) circuits employing multiple PUF memories to decouple a PUF challenge input from a PUF response output for enhanced security. The PUF circuit includes a PUF challenge memory and a PUF response memory. In response to a read operation, the PUF challenge memory uses a received PUF challenge input data word to address PUF challenge memory arrays therein to generate a plurality of intermediate PUF challenge output data words. The PUF response memory is configured to generate a second, final PUF response output data word in response to intermediate PUF challenge output data words. In this manner, it is more difficult to learn the challenge-response behavior of the PUF circuit, because the PUF challenge input data word does not directly address a memory array that stores memory states representing final logic values in the PUF response output data word.
    Type: Application
    Filed: May 2, 2018
    Publication date: November 7, 2019
    Inventors: Xia Li, Seung Hyuk Kang, Nicholas Ka Ming Stevens-Yu
  • Publication number: 20190328817
    Abstract: Provided are a series of traditional Chinese medicine healthcare preparations for fat elimination and weight reduction, which are traditional Chinese medicine healthcare preparations produced by adding an appropriate raw medicine to basic active pharmaceutical ingredients consisting of rose flower, soybean protein isolate, konjac flour, soybean oligosaccharide, oat, Chinese date, and L-carnitine, or consisting of gardenia, soybean oligosaccharide, L-carnitine, and konjac flour.
    Type: Application
    Filed: March 6, 2017
    Publication date: October 31, 2019
    Applicant: Gansu dazheng health management Co., Ltd.
    Inventors: Xiaorong JIA, Xinben WANG, Xia LI, Wei LI, Quanlong YANG, Shuangyan LIU, Yongdong YUE
  • Patent number: 10461164
    Abstract: A compound semiconductor field effect transistor (FET) may include gallium nitride (GaN) and alloy material layers. The compound semiconductor FET may also include a pair of L-shaped contacts on the GaN and alloy material layers. The compound semiconductor FET may also include a pair of gate spacers between the L-shaped contacts and on the GaN and alloy material layers, each of the pair of gate spacers contacting one of the L-shaped contacts. The compound semiconductor FET may further include a base gate between the pair of gate spacers and on the GaN and alloy material layers, in which the pair of L-shaped contacts are self-aligned with the base gate.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: October 29, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Bin Yang, Xia Li, Gengming Tao, Periannan Chidambaram
  • Patent number: 10460817
    Abstract: Multiple (multi-) level cell (MLC) non-volatile (NV) memory (NVM) matrix circuits for performing matrix computations with multi-bit input vectors are disclosed. An MLC NVM matrix circuit includes a plurality of NVM storage string circuits that each include a plurality of MLC NVM storage circuits each containing a plurality of NVM bit cell circuits each configured to store 1-bit memory state. Thus, each MLC NVM storage circuit stores a multi-bit memory state according to memory states of its respective NVM bit cell circuits. Each NVM bit cell circuit includes a transistor whose gate node is coupled to a word line among a plurality of word lines configured to receive an input vector. Activation of the gate node of a given NVM bit cell circuit in an MLC NVM storage circuit controls whether its resistance is contributed to total resistance of an MLC NVM storage circuit coupled to a respective source line.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: October 29, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Seung Hyuk Kang, Wei-Chuan Chen
  • Patent number: 10453774
    Abstract: Aspects generally relate to an integrated circuit including a glass substrate. On a surface of the glass substrate a thermally conductive insulating layer is formed. At least one metal layer is formed above the thermally conductive insulating layer, and a plurality of thermal bumps extend through the at least one metal layer and couple to the thermally conductive insulating layer to dissipate heat from the substrate.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: October 22, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Kai Liu, Bin Yang, Xia Li
  • Patent number: 10446743
    Abstract: Double-patterned magneto-resistive random access memory (MRAM) for reducing magnetic tunnel junction (MTJ) pitch for increased MRAM bit cell density is disclosed. In one aspect, to fabricate MTJs in an MRAM array with reduced MTJ row pitch, a first patterning process is performed to provide separation areas in an MTJ layer between what will become rows of fabricated MTJs, which facilitates MTJs in a given row sharing a common bottom electrode. This reduces the etch depth and etching time needed to etch the individual MTJs in a subsequent step, can reduce lateral projections of sidewalls of the MTJs, thereby relaxing the pitch between adjacent MTJs, and may allow an initial MTJ hard mask layer to be reduced in height. A subsequent second patterning process is performed to fabricate individual MTJs. Additional separation areas are etched between free layers of adjacent MTJs in a given row to fabricate the individual MTJs.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: October 15, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Wei-Chuan Chen
  • Publication number: 20190312153
    Abstract: Aspects of the present disclosure provide semiconductor variable capacitor devices. In one embodiment, a semiconductor variable capacitor includes a gate oxide layer comprising a first layer portion with a first thickness and a second layer portion with a second thickness; a first non-insulative region disposed above the gate oxide layer; a first semiconductor region disposed beneath the gate oxide layer; a second semiconductor region disposed beneath the gate oxide layer and adjacent to the first semiconductor region, wherein the second semiconductor region comprises a different doping type than the first semiconductor region a second non-insulative region coupled to the first semiconductor region; and a control terminal coupled to a control region coupled to the second semiconductor region such that a first capacitance between the first non-insulative region and the second non-insulative region is configured to be adjusted by varying a control voltage applied to the control region.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 10, 2019
    Inventors: Xia LI, Bin YANG, Gengming TAO
  • Publication number: 20190308247
    Abstract: Provided are a flaked tantalum powder and method for preparation thereof; said flaked tantalum powder contains 300-1800 ppm of nitrogen, 10-100 ppm of phosphorus, and 1-40 ppm of boron. The flaked tantalum powder has high capacity and low leakage current, good puncture-resistance, and particularly outstanding high-frequency attributes. Doping with nitrogen during oxygen reduction is performed before three thermal treatments are carried out; the solution of performing three thermal treatments and a subsequent process improves the uniformity of distribution of elemental nitrogen and makes up for the deficiency of an oxide film, thereby increasing the pressure resistance of the product, and especially its high-frequency attributes.
    Type: Application
    Filed: July 13, 2016
    Publication date: October 10, 2019
    Inventors: Xueqing CHEN, Yuewei CHENG, Yuezhong MA, Zhongxiang LI, Zhidao WANG, Xia LI, Dejun SHI, Zhonghuan ZHAO
  • Patent number: 10438654
    Abstract: Transpose static random access memory (SRAM) bit cells configured for horizontal and vertical read operations are disclosed. In one aspect, a transpose SRAM bit cell includes cross-coupled inverters and horizontal and vertical read access transistors. A word line in first metal layer having an axis in a first direction is electrically coupled to a gate node of the horizontal read access transistor, and a bit line in second metal layer having an axis disposed in a second direction substantially orthogonal to the first direction is electrically coupled to the horizontal read access transistor. A transpose word line in third metal layer having an axis disposed in the second direction is electrically coupled to a gate node of the vertical read access transistor, and a transpose bit line in fourth metal layer having an axis disposed in the first direction is electrically coupled to the vertical read access transistor.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: October 8, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Xia Li, Yandong Gao