Patents by Inventor Jun Cai

Jun Cai 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).

  • Publication number: 20070120184
    Abstract: An HV PMOS device formed on a substrate having an HV well of a first polarity type formed in an epitaxial layer of a second polarity type includes a pair of field oxide regions on the substrate and at least partially over the HV well. Insulated gates are formed on the substrate between the field oxide regions. Stacked hetero-doping rims are formed in the HV well and in self-alignment with outer edges of the gates. A buffer region of the first polarity type is formed in the HV well between and in self-alignment with inner edges of the gates. A drift region of the second polarity type is formed in the buffer region between and in self-alignment with inner edges of the gates. The drift region includes a region having a gradual dopant concentration change, and includes a drain region of the second polarity type.
    Type: Application
    Filed: January 31, 2007
    Publication date: May 31, 2007
    Inventors: Jun Cai, Michael Harley-Stead, Jim Holt
  • Patent number: 7220646
    Abstract: A semiconductor integrated circuit including an LDMOS device structure comprises a semiconductor layer with a pair of spaced-apart field effect gate structures over an upper surface of the semiconductor layer. First and second spaced-apart source regions of a first conductivity type are formed in a portion of the layer between the pair of gate structures with a first region of a second conductivity type formed there between. A lightly doped body region of a second conductivity type is formed in the semiconductor layer, extending from below the source regions to below the gate structures and extending a variable depth into the semiconductor layer. This body region is characterized by an inflection in depth in that portion of the body region extending below the first region.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: May 22, 2007
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Jun Cai
  • Publication number: 20070085843
    Abstract: The present invention relates to a multimode display device (101) comprising a display area, where said display device is, in a first mode, adapted for displaying displayfocused applications on the display area, where said display device is, in a second mode, adapted for displaying audio-specific information on the display area describing audio being played back and where the display device is, in a third mode, adapted for simultaneously displaying independent display-focused applications and audio-specific information on the display area, the device comprises: receiving means (307) adapted for receiving audio data comprising said audio-specific information; processing means (309) adapted for displaying said audio-specific information on said display area. Thereby the user can choose to view the audio-specific information on the display device, while listening to the audio.
    Type: Application
    Filed: November 16, 2004
    Publication date: April 19, 2007
    Inventors: Weng Lam, Chunrui Zhang, Naing Win, Jun Cai
  • Patent number: 7205612
    Abstract: A device and method are described for forming a grounded gate NMOS (GGNMOS) device used to provide protection against electrostatic discharge (ESD) in an integrated circuit (IC). The device is achieved by adding n-wells below the source and drain regions. By tailoring the dopant concentration profiles of the p-well and n-wells provided in the fabrication process, peak dopant concentrations are moved below the silicon surface. This moves ESD conduction deeper into the IC where thermal conductivity is improved, thereby avoiding thermal damage occurring with surface conduction. The device does not require a salicidation block or additional implantation and uses standard NMOS fabrication processing steps, making it advantageous over prior art solutions.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: April 17, 2007
    Assignee: Chartered Semiconductor Manufacturing Ltd.
    Inventors: Jun Cai, Keng Foo Lo
  • Publication number: 20070040212
    Abstract: An asymmetric heterodoped metal oxide (AH2MOS) semiconductor device includes a substrate and an insulated gate on the top of the substrate disposed between a source region and a drain region. On one side of the gate, heterodoped tub and source regions are formed. The tub region has dopants of a second polarity. A source region is disposed inside each tub region and has dopants of a first polarity opposite to the second polarity. On the other side of the gate, heterodoped buffer and drift regions are formed. The buffer regions comprise dopants of the second polarity. The drift regions are disposed inside the buffer regions and are doped with dopants of the first polarity. A drain n+ tap region is disposed in the drift region.
    Type: Application
    Filed: October 23, 2006
    Publication date: February 22, 2007
    Inventors: Jun Cai, Michael Harley-Stead, Jim Holt
  • Patent number: 7180132
    Abstract: An HV PMOS device formed on a substrate having an HV well of a first polarity type formed in an epitaxial layer of a second polarity type includes a pair of field oxide regions on the substrate and at least partially over the HV well. Insulated gates are formed on the substrate between the field oxide regions. Stacked hetero-doping rims are formed in the HV well and in self-alignment with outer edges of the gates. A buffer region of the first polarity type is formed in the HV well between and in self-alignment with inner edges of the gates. A drift region of the second polarity type is formed in the buffer region between and in self-alignment with inner edges of the gates. The drift region includes a region having a gradual dopant concentration change, and includes a drain region of the second polarity type.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: February 20, 2007
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jun Cai, Michael Harley-Stead, Jim G. Holt
  • Publication number: 20070018250
    Abstract: A diode-connected lateral transistor on a substrate of a first conductivity type includes a vertical parasitic transistor through which a parasitic substrate leakage current flows. Means for shunting at least a portion of the flow of parasitic substrate leakage current away from the vertical parasitic transistor is provided.
    Type: Application
    Filed: May 15, 2006
    Publication date: January 25, 2007
    Inventors: Jun Cai, Micheal Harley-Stead, Jim Holt
  • Patent number: 7154150
    Abstract: An ESD device and method using parasitic bipolar transistors that are silicided. The first embodiment is a parasitic Bipolar Junction Transistor comprised of n+/n?/p?/n?/n+ regions. The emitter is formed of the second N+ region and the second N? well. The parasitic base is formed by the p? substrate or well. The collector is formed of the first well and the first n+ region. The benefit of the first embodiment is the trigger voltage is lower because the junction between the n? well (emitter) and P? substrate (base) and the junction between P? substrate (base) and the n? well have lower cross over concentrations. The second embodiment is similar to the first embodiment with the addition of the first gate. The first gate is preferably connected to the first n+ region and the Vpad. The third embodiment contains the same elements as the second embodiment with the addition of a third n+ region. The third n+ region is preferably shorted (or connected) to the first p+ region and the second n+ region.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Nano Silicon Pte. Ltd.
    Inventors: David Hu, Jun Cai
  • Publication number: 20060265720
    Abstract: A method, system and Web service broker with requester's explicit control for dynamic Web service invocation. In accordance with the method a Web service request is constructed by a Web service requester, in which invocation criteria customized by the requester are included and the Web service request is sent to a Web service broker. The Web service broker discovers and invokes Web service implementation candidates that meet the invocation criteria based on the Web service request and returns the best invocation result as well as a session identifier for identifying this service request to the requester. The requester can explicitly control the process of Web service invocations through customized Web service requests, thus delegating the whole invocation process to a Web services broker to reduce the complexity of client-side tasks. In addition, the Web service invocation allows a series of invocations with a consistent business sense to be directed to the same Web service interface.
    Type: Application
    Filed: May 22, 2006
    Publication date: November 23, 2006
    Applicant: International Business Machines Corporation
    Inventors: Jun Cai, Chun Tong
  • Patent number: 7125777
    Abstract: An asymmetric hetero-doped metal oxide (AH2MOS) semiconductor device includes a substrate and an insulated gate on the top of the substrate disposed between a source region and a drain region. On one side of the gate, heterodoped tub and source regions are formed. The tub region has dopants of a second polarity. A source region is disposed inside each tub region and has dopants of a first polarity opposite to the second polarity. On the other side of the gate, heterodoped buffer and drift regions are formed. The buffer regions comprise dopants of the second polarity. The drift regions are disposed inside the buffer regions and are doped with dopants of the first polarity. A drain n+ tap region is disposed in the drift region.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: October 24, 2006
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jun Cai, Michael Harley-Stead, Jim G. Holt
  • Publication number: 20060118814
    Abstract: A diode-connected lateral transistor on a substrate of a first conductivity type includes a vertical parasitic transistor through which a parasitic substrate leakage current flows. Means for shunting at least a portion of the flow of parasitic substrate leakage current away from the vertical parasitic transistor is provided.
    Type: Application
    Filed: December 7, 2004
    Publication date: June 8, 2006
    Inventors: Jun Cai, Micheal Harley-Stead, Jim Holt
  • Patent number: 7045830
    Abstract: A diode-connected lateral transistor on a substrate of a first conductivity type includes a vertical parasitic transistor through which a parasitic substrate leakage current flows. Means for shunting at least a portion of the flow of parasitic substrate leakage current away from the vertical parasitic transistor is provided.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: May 16, 2006
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jun Cai, Micheal Harley-Stead, Jim G. Holt
  • Publication number: 20060057784
    Abstract: An HV PMOS device formed on a substrate having an HV well of a first polarity type formed in an epitaxial layer of a second polarity type includes a pair of field oxide regions on the substrate and at least partially over the HV well. Insulated gates are formed on the substrate between the field oxide regions. Stacked hetero-doping rims are formed in the HV well and in self-alignment with outer edges of the gates. A buffer region of the first polarity type is formed in the HV well between and in self-alignment with inner edges of the gates. A drift region of the second polarity type is formed in the buffer region between and in self-alignment with inner edges of the gates. The drift region includes a region having a gradual dopant concentration change, and includes a drain region of the second polarity type.
    Type: Application
    Filed: September 16, 2004
    Publication date: March 16, 2006
    Inventors: Jun Cai, Michael Harley-Stead, Jim Holt
  • Publication number: 20060011985
    Abstract: An asymmetric heterodoped metal oxide (AH2MOS) semiconductor device includes a substrate and an insulated gate on the top of the substrate disposed between a source region and a drain region. On one side of the gate, heterodoped tub and source regions are formed. The tub region has dopants of a second polarity. A source region is disposed inside each tub region and has dopants of a first polarity opposite to the second polarity. On the other side of the gate, heterodoped buffer and drift regions are formed. The buffer regions comprise dopants of the second polarity. The drift regions are disposed inside the buffer regions and are doped with dopants of the first polarity. A drain n+ tap region is disposed in the drift region.
    Type: Application
    Filed: July 15, 2004
    Publication date: January 19, 2006
    Inventors: Jun Cai, Michael Harley-Stead, Jim Holt
  • Publication number: 20050239253
    Abstract: A semiconductor integrated circuit including an LDMOS device structure comprises a semiconductor layer with a pair of spaced-apart field effect gate structures over an upper surface of the semiconductor layer. First and second spaced-apart source regions of a first conductivity type are formed in a portion of the layer between the pair of gate structures with a first region of a second conductivity type formed there between. A lightly doped body region of a second conductivity type is formed in the semiconductor layer, extending from below the source regions to below the gate structures and extending a variable depth into the semiconductor layer. This body region is characterized by an inflection in depth in that portion of the body region extending below the first region.
    Type: Application
    Filed: March 1, 2005
    Publication date: October 27, 2005
    Inventor: Jun Cai
  • Publication number: 20050148124
    Abstract: A process for forming a vertical DMOS device with an ESD protection transistor that is configured for carrying a breakdown current includes the steps of masking a substrate of a first polarity type and forming spaced apart surface isolation regions. An insulated gate is formed between the spaced apart surface isolation regions. Selected portions of the surface regions between the gate and the surface isolation regions are heterodoped to form p-n junctions having retrograde doping profiles beneath the substrate surface thereby lowering the breakdown voltage beneath the heterodoped portions in order to direct a substantial portion of the breakdown current below the surface of the substrate and into the body of the substrate between the heterodoped regions. Source and drain regions are formed in the substrate surface on opposite sides of the gate.
    Type: Application
    Filed: February 9, 2005
    Publication date: July 7, 2005
    Inventors: Jun Cai, Alvin Sugerman, Steven Park
  • Publication number: 20050146954
    Abstract: The product has a power supply (P2) and a processor (P). The processor (P) has an input (PDD) for receiving a power-down signal indicating a status of the power supply (P2) and another input (Q) connected to another supply. The product also has a non-volatile memory (M) for storing data supplied by the processor (P). The processor (P) has an algorithm to detect a power-down status of the power supply (P2) by repeatedly checking the power-down signal and, upon detection that the power-down signal has a value (S0) corresponding to the power-down status, to complete an ongoing writing operation and stop the storage of data. The method prevents incorrect storage of data in a non-volatile memory by using the mentioned algorithm.
    Type: Application
    Filed: February 17, 2003
    Publication date: July 7, 2005
    Inventors: Naing Win, Jun Cai, Joseph Jimson, Weng Lam
  • Publication number: 20050093070
    Abstract: A device and method are described for forming a grounded gate NMOS (GGNMOS) device used to provide protection against electrostatic discharge (ESD) in an integrated circuit (IC). The device is achieved by adding n-wells below the source and drain regions. By tailoring the dopant concentration profiles of the p-well and n-wells provided in the fabrication process, peak dopant concentrations are moved below the silicon surface. This moves ESD conduction deeper into the IC where thermal conductivity is improved, thereby avoiding thermal damage occurring with surface conduction. The device does not require a salicidation block or additional implantation and uses standard NMOS fabrication processing steps, making it advantageous over prior art solutions.
    Type: Application
    Filed: November 1, 2004
    Publication date: May 5, 2005
    Inventors: Jun Cai, Keng Lo
  • Patent number: 6873017
    Abstract: Device 60 in FIG. 3 has junctions 86 each with a lateral portion 90 and a second portion 92 extending upward toward the surface 12 from the lateral portion 90. The lateral portions 90, as illustrated in FIG. 3, are more or less formed along a plane parallel with the surface 12. The upwardly extending portions 92 include characteristic curved edges of the diffusion fronts which are associated with the planar process. With the regions 80 and 82 each having relatively high net dopant concentrations of different conductivity types, each lateral junction portion 90 includes a relatively large sub region 96 which extends more deeply into the layer 10. When compared to other portions of the junctions 86, the subregions 96 are characterized by a relatively low breakdown voltage so that ESD current is initially directed vertically rather than laterally.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: March 29, 2005
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Jun Cai, Alvin Sugerman, Steven Park
  • Patent number: 6870218
    Abstract: A semiconductor integrated circuit including an LDMOS device structure includes a semiconductor layer with a pair of spaced-apart field effect gate structures over an upper surface of the semiconductor layer. First and second spaced-apart source regions of a first conductivity type are formed in a portion of the layer between the pair of gate structures with a first region of a second conductivity type formed there between. A lightly doped body region of a second conductivity type is formed in the semiconductor layer, extending from below the source regions to below the gate structures and extending a variable depth into the semiconductor layer. This body region is characterized by an inflection in depth in that portion of the body region extending below the first region.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: March 22, 2005
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Jun Cai