Patents by Inventor Rajeev Joshi

Rajeev Joshi 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: 20040178481
    Abstract: A method for forming a stud bumped semiconductor die is disclosed. The method includes forming a ball at the tip of a coated wire passing through a hole in a capillary, where the coated wire has a core and an oxidation-resistant coating. The formed ball is pressed to the conductive region on the semiconductor die. The coated wire is cut, thereby leaving a conductive stud bump on the conductive region, where the conductive stud bump includes an inner conductive portion and an outer oxidation-resistant layer.
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Inventors: Rajeev Joshi, Consuelo Tangpuz, Margie T. Rios, Erwin Victor R. Cruz
  • Publication number: 20040164386
    Abstract: A semiconductor device that does not include a molded body or package. The semiconductor device includes a substrate and a die coupled to the substrate. The die is coupled to the substrate such that the source and gate regions of the die, assuming a MOSFET-type device, are coupled to the substrate. Solder balls are provided adjacent to the die such that when the semiconductor device is coupled to a printed circuit board, the exposed surface of the serves as the drain connections while the solder balls serve as the source and gate connections.
    Type: Application
    Filed: December 29, 2003
    Publication date: August 26, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Publication number: 20040159939
    Abstract: A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.
    Type: Application
    Filed: December 19, 2003
    Publication date: August 19, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Publication number: 20040137724
    Abstract: A method for processing a semiconductor substrate is disclosed. The method includes providing a mask having an aperture on a semiconductor substrate having a conductive region. An aperture in the mask is disposed over the conductive region. A pre-formed conductive column is placed in the aperture and is bonded to the conductive region.
    Type: Application
    Filed: December 22, 2003
    Publication date: July 15, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Chung-Lin Wu
  • Publication number: 20040125573
    Abstract: A multichip module is disclosed. In one embodiment, the multichip module includes a substrate having a first side and a second side, the first side being opposite to the first side. A driver chip is at the first side of the substrate. A semiconductor die comprising a vertical transistor is at the second side of the substrate. The driver chip and the semiconductor die are in electrical communication through the substrate.
    Type: Application
    Filed: December 26, 2002
    Publication date: July 1, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Maria Cristina B. Estacio
  • Patent number: 6753605
    Abstract: A bumped wafer for use in making a chip device. The bumped wafer includes two titanium layers sputtered alternatingly with two copper layers over a non-passivated die. The bumped wafer further includes under bump material under solder bumps contained thereon.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: June 22, 2004
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Patent number: 6731003
    Abstract: A method for forming a semiconductor die package is disclosed. In one embodiment, the method includes forming a semiconductor die comprising a semiconductor device. A plurality of copper bumps is formed on the semiconductor die using a plating process. An adhesion layer is formed on each of the copper bumps, and a noble metal layer is formed on each of the copper bumps.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: May 4, 2004
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Consuelo Tangpuz, Erwin Victor R. Cruz
  • Patent number: 6720642
    Abstract: A chip device that includes a leadframe, a die and a mold compound. The backside of the die is metallized and exposed through a window defined within a mold compound that encapsulates the die when it is coupled to the leadframe. Leads on the leadframe are coupled to source and gate terminals on the die while the metallized backside of the die serves as the drain terminals.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: April 13, 2004
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Consuelo N. Tangpuz, Romel N. Manatad
  • Publication number: 20040056364
    Abstract: A chip device that includes a leadframe, a die and a mold compound. The backside of the die is metallized and exposed through a window defined within a mold compound that encapsulates the die when it is coupled to the leadframe. Leads on the leadframe are coupled to source and gate terminals on the die while the metallized backside of the die serves as the drain terminals.
    Type: Application
    Filed: June 27, 2003
    Publication date: March 25, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Consuelo N. Tangpuz, Romel N. Manatad
  • Publication number: 20040041242
    Abstract: A semiconductor die package is disclosed. In one embodiment, the semiconductor die package has a substrate. It includes (i) a lead frame structure including a die attach region with a die attach surface and a lead having a lead surface, and (ii) a molding material. The die attach surface and the lead surface are exposed through the molding material. A semiconductor die is on the die attach region, and the semiconductor die is electrically coupled to the lead.
    Type: Application
    Filed: August 30, 2002
    Publication date: March 4, 2004
    Applicant: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Patent number: 6696321
    Abstract: A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: February 24, 2004
    Assignee: Fairchild Semiconductor, Corporation
    Inventor: Rajeev Joshi
  • Patent number: 6683375
    Abstract: A method for processing a semiconductor substrate is disclosed. The method includes providing a mask having an aperture on a semiconductor substrate having a conductive region. An aperture in the mask is disposed over the conductive region. A pre-formed conductive column is placed in the aperture and is bonded to the conductive region.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: January 27, 2004
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Chung-Lin Wu
  • Patent number: 6661082
    Abstract: A chip device that includes a leadframe that has a die attach cavity. The memory device further includes a die that is placed within the die attach cavity. The die attach cavity is substantially the same thickness as the die. The die is positioned within the cavity and is attached therein with a standard die attachment procedure.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: December 9, 2003
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Honorio T. Granada, Rajeev Joshi, Connie Tangpuz
  • Publication number: 20030197278
    Abstract: A semiconductor die package is disclosed. The die package includes a semiconductor die having a first side and a second side, a vertical transistor, and a bond pad at the first side. A passivation layer having a first aperture is on the first side, and the bond pad is exposed through the first aperture. An underbump metallurgy layer is on and in direct contact with the passivation layer. The underbump metallurgy layer is within the first aperture and contacts the bond pad. A dielectric layer comprising a second aperture is on and in direct contact with the underbump metallurgy layer. A solder structure is on the underbump metallurgy layer and is within the second aperture of the dielectric layer.
    Type: Application
    Filed: April 14, 2003
    Publication date: October 23, 2003
    Inventors: Rajeev Joshi, Chung-Lin Wu
  • Patent number: 6633030
    Abstract: An optocoupler package is disclosed. The optocoupler package comprises a carrier substrate and a plurality of conductive regions on the carrier substrate. An optoelectronic device, an optically transmissive medium, and a plurality of conductive structures can be on the carrier substrate.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: October 14, 2003
    Assignee: Fiarchild Semiconductor
    Inventor: Rajeev Joshi
  • Patent number: 6627991
    Abstract: A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: September 30, 2003
    Assignee: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Publication number: 20030173684
    Abstract: A method for forming a semiconductor die package is disclosed. In one embodiment, the method includes forming a semiconductor die comprising a semiconductor device. A plurality of copper bumps is formed on the semiconductor die using a plating process. An adhesion layer is formed on each of the copper bumps, and a noble metal layer is formed on each of the copper bumps.
    Type: Application
    Filed: March 11, 2003
    Publication date: September 18, 2003
    Inventors: Rajeev Joshi, Consuelo Tangpuz, Erwin Victor R. Cruz
  • Publication number: 20030122247
    Abstract: A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 3, 2003
    Applicant: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventor: Rajeev Joshi
  • Publication number: 20030107126
    Abstract: A structure and method of manufacture for an improved multi-chip semiconductor package that reduces package resistance to a negligible level, and offers superior thermal performance. Housing of multiple dies is facilitated by providing electrically isolated lead frames that are separated from a common base carrier by a non-conductive layer of laminating material. A silicon die is attached inside a cavity formed in each lead frame. Direct connection of the active surface of the silicon die to the printed circuit board is then made by an array of solder bumps that is distributed across the surface of each die as well as the edges of the lead frame adjacent to each die.
    Type: Application
    Filed: September 17, 2002
    Publication date: June 12, 2003
    Applicant: Fairchild Semiconductor Corporation
    Inventor: Rajeev Joshi
  • Patent number: 6566749
    Abstract: A semiconductor die package is disclosed. In one embodiment, the package includes a semiconductor die comprising a vertical power transistor. A source electrode and a gate contact region are at the first surface of the semiconductor die. A drain electrode is at the second surface of the semiconductor die. A base member is proximate to the second surface of the semiconductor die and is distal to the first surface of the semiconductor die and a cover disposed over the first surface of the semiconductor die. The cover is coupled to the base member and is adapted to transfer beat away from the semiconductor die.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: May 20, 2003
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev Joshi, Steven Sapp