Patents by Inventor Rajeev D. Joshi

Rajeev D. 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).

  • Patent number: 11257739
    Abstract: A method includes forming a first magnetic material on a first surface of a conductive loop, forming a second magnetic material on a second surface of the conductive loop opposite the first surface to form an inductor, attaching a semiconductor die to a leadframe, and attaching the inductor to the leadframe with solder balls. The semiconductor die is between the inductor and the leadframe. The conductive loop: spans parallel to the leadframe; or is between the first magnetic material and the second magnetic material.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: February 22, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Joyce Marie Mullenix, Roberto Giampiero Massolini, Rajeev D. Joshi
  • Publication number: 20200343164
    Abstract: A method includes forming a first magnetic material on a first surface of a conductive loop, forming a second magnetic material on a second surface of the conductive loop opposite the first surface to form an inductor, attaching a semiconductor die to a leadframe, and attaching the inductor to the leadframe with solder balls. The semiconductor die is between the inductor and the leadframe. The conductive loop: spans parallel to the leadframe; or is between the first magnetic material and the second magnetic material.
    Type: Application
    Filed: July 13, 2020
    Publication date: October 29, 2020
    Inventors: Joyce Marie Mullenix, Roberto Giampiero Massolini, Rajeev D. Joshi
  • Patent number: 10714412
    Abstract: A semiconductor package includes a leadframe comprising input/output pins accessible external to the semiconductor package and a semiconductor die electrically connected to the leadframe. The semiconductor package also includes a passive electrical component mounted on a side of the semiconductor die opposite the leadframe. Mold compound encapsulates the passive electrical component, semiconductor die, and leadframe to form the semiconductor package. Associated methods are disclosed as well.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: July 14, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Joyce Marie Mullenix, Roberto Giampiero Massolini, Rajeev D. Joshi
  • Patent number: 10573582
    Abstract: A dual leadframe (100) for semiconductor systems comprising a first leadframe (110) having first metal zones separated by first gaps, the first zones including portions of reduced thickness and joint provisions in selected first locations, and further a second leadframe (120) having second metal zones separated by second gaps, the second zones including portions of reduced thickness and joint provisions (150) in selected second locations matching the first locations. The second leadframe is stacked on top of the first leadframe and the joint provisions of the matching second and first locations linked together. The resulting dual leadframe may further include insulating material (140) filling the first and second gaps and the zone portions of reduced thickness, and has insulating surfaces coplanar with the top and bottom metallic surfaces.
    Type: Grant
    Filed: April 8, 2019
    Date of Patent: February 25, 2020
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajeev D. Joshi, Hau Nguyen, Anindya Poddar, Ken Pham
  • Publication number: 20190237395
    Abstract: A dual leadframe (100) for semiconductor systems comprising a first leadframe (110) having first metal zones separated by first gaps, the first zones including portions of reduced thickness and joint provisions in selected first locations, and further a second leadframe (120) having second metal zones separated by second gaps, the second zones including portions of reduced thickness and joint provisions (150) in selected second locations matching the first locations. The second leadframe is stacked on top of the first leadframe and the joint provisions of the matching second and first locations linked together. The resulting dual leadframe may further include insulating material (140) filling the first and second gaps and the zone portions of reduced thickness, and has insulating surfaces coplanar with the top and bottom metallic surfaces.
    Type: Application
    Filed: April 8, 2019
    Publication date: August 1, 2019
    Inventors: Rajeev D. Joshi, Hau Nguyen, Anindya Poddar, Ken Pham
  • Patent number: 10312184
    Abstract: A dual leadframe (100) for semiconductor systems comprising a first leadframe (110) having first metal zones separated by first gaps, the first zones including portions of reduced thickness and joint provisions in selected first locations, and further a second leadframe (120) having second metal zones separated by second gaps, the second zones including portions of reduced thickness and joint provisions (150) in selected second locations matching the first locations. The second leadframe is stacked on top of the first leadframe and the joint provisions of the matching second and first locations linked together. The resulting dual leadframe may further include insulating material (140) filling the first and second gaps and the zone portions of reduced thickness, and has insulating surfaces coplanar with the top and bottom metallic surfaces.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: June 4, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Rajeev D. Joshi, Hau Nguyen, Anindya Poddar, Ken Pham
  • Publication number: 20190157188
    Abstract: A semiconductor package includes a leadframe comprising input/output pins accessible external to the semiconductor package and a semiconductor die electrically connected to the leadframe. The semiconductor package also includes a passive electrical component mounted on a side of the semiconductor die opposite the leadframe. Mold compound encapsulates the passive electrical component, semiconductor die, and leadframe to form the semiconductor package. Associated methods are disclosed as well.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 23, 2019
    Inventors: Joyce Marie MULLENIX, Roberto Giampiero MASSOLINI, Rajeev D. JOSHI
  • Publication number: 20170125324
    Abstract: A dual leadframe (100) for semiconductor systems comprising a first leadframe (110) having first metal zones separated by first gaps, the first zones including portions of reduced thickness and joint provisions in selected first locations, and further a second leadframe (120) having second metal zones separated by second gaps, the second zones including portions of reduced thickness and joint provisions (150) in selected second locations matching the first locations. The second leadframe is stacked on top of the first leadframe and the joint provisions of the matching second and first locations linked together. The resulting dual leadframe may further include insulating material (140) filling the first and second gaps and the zone portions of reduced thickness, and has insulating surfaces coplanar with the top and bottom metallic surfaces.
    Type: Application
    Filed: November 4, 2015
    Publication date: May 4, 2017
    Inventors: Rajeev D. Joshi, Hau Nguyen, Anindya Poddar, Ken Pham
  • Patent number: 8278742
    Abstract: A semiconductor package includes a semiconductor device 30 and a molded upper heat sink 10. The heat sink has an interior surface 16 that faces the semiconductor device and an exterior surface 15 that is at least partially exposed to the ambient environment of the packaged device. An annular planar base 11 surrounds a raised or protruding central region 12. That region is supported above the plane of the base 11 by four sloped walls 13.1-13.4. The walls slope at an acute angle with respect to the planar annular base and incline toward the center of the upper heat sink 10. Around the outer perimeter of the annular base 11 are four support arms 18.1-18.4. The support arms are disposed at an obtuse angle with respect to the interior surface 16 of the planar annular base 11.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: October 2, 2012
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Chung-Lin Wu, Rajeev D. Joshi
  • Patent number: 7968982
    Abstract: A semiconductor package includes a semiconductor device 30 and a molded upper heat sink 10. The heat sink has an interior surface 16 that faces the semiconductor device and an exterior surface 15 that is at least partially exposed to the ambient environment of the packaged device. An annular planar base 11 surrounds a raised or protruding central region 12. That region is supported above the plane of the base 11 by four sloped walls 13.1-13.4. The walls slope at an acute angle with respect to the planar annular base and incline toward the center of the upper heat sink 10. Around the outer perimeter of the annular base 11 are four support arms 18.1-18.4. The support arms are disposed at an obtuse angle with respect to the interior surface 16 of the planar annular base 11.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: June 28, 2011
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Chung-Lin Wu, Rajeev D. Joshi
  • Publication number: 20110124158
    Abstract: A semiconductor package includes a semiconductor device 30 and a molded upper heat sink 10. The heat sink has an interior surface 16 that faces the semiconductor device and an exterior surface 15 that is at least partially exposed to the ambient environment of the packaged device. An annular planar base 11 surrounds a raised or protruding central region 12. That region is supported above the plane of the base 11 by four sloped walls 13.1-13.4. The walls slope at an acute angle with respect to the planar annular base and incline toward the center of the upper heat sink 10. Around the outer perimeter of the annular base 11 are four support arms 18.1-18.4. The support arms are disposed at an obtuse angle with respect to the interior surface 16 of the planar annular base 11.
    Type: Application
    Filed: February 2, 2011
    Publication date: May 26, 2011
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Chung-Lin Wu, Rajeev D. Joshi
  • Patent number: 7842555
    Abstract: An integrated transistor module includes a lead frame that defines at least one low-side land and at least one high-side land. A stepped portion of the lead frame mechanically and electrically interconnects the low-side and high-side lands. A low-side transistor is mounted upon the low-side land with its drain electrically connected to the low-side land. A high-side transistor is mounted upon the high-side land with its source electrically connected to the high-side land.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: November 30, 2010
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev D. Joshi, Jonathan A. Noquil, Consuelo N. Tangpuz
  • Publication number: 20090117690
    Abstract: An integrated transistor module includes a lead frame that defines at least one low-side land and at least one high-side land. A stepped portion of the lead frame mechanically and electrically interconnects the low-side and high-side lands. A low-side transistor is mounted upon the low-side land with its drain electrically connected to the low-side land. A high-side transistor is mounted upon the high-side land with its source electrically connected to the high-side land.
    Type: Application
    Filed: January 6, 2009
    Publication date: May 7, 2009
    Inventors: Rajeev D. Joshi, Jonathan A. Noquil, Consuelo N. Tangpuz
  • Publication number: 20090072362
    Abstract: A semiconductor package includes a semiconductor device 30 and a molded upper heat sink 10. The heat sink has an interior surface 16 that faces the semiconductor device and an exterior surface 15 that is at least partially exposed to the ambient environment of the packaged device. An annular planar base 11 surrounds a raised or protruding central region 12. That region is supported above the plane of the base 11 by four sloped walls 13.1-13.4. The walls slope at an acute angle with respect to the planar annular base and incline toward the center of the upper heat sink 10. Around the outer perimeter of the annular base 11 are four support arms 18.1-18.4. The support arms are disposed at an obtuse angle with respect to the interior surface 16 of the planar annular base 11.
    Type: Application
    Filed: July 10, 2008
    Publication date: March 19, 2009
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Chung-Lin Wu, Rajeev D. Joshi
  • Patent number: 7501702
    Abstract: An integrated transistor module includes a lead frame that defines at least one low-side land and at least one high-side land. A stepped portion of the lead frame mechanically and electrically interconnects the low-side and high-side lands. A low-side transistor is mounted upon the low-side land with its drain electrically connected to the low-side land. A high-side transistor is mounted upon the high-side land with its source electrically connected to the high-side land.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: March 10, 2009
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Rajeev D. Joshi, Jonathan A. Noquil, Consuelo N. Tangpuz
  • Patent number: 7468548
    Abstract: A semiconductor package includes a semiconductor device 30 and a molded upper heat sink 10. The heat sink has an interior surface 16 that faces the semiconductor device and an exterior surface 15 that is at least partially exposed to the ambient environment of the packaged device. An annular planar base 11 surrounds a raised or protruding central region 12. That region is supported above the plane of the base 11 by four sloped walls 13.1-13.4. The walls slope at an acute angle with respect to the planar annular base and incline toward the center of the upper heat sink 10. Around the outer perimeter of the annular base 11 are four support arms 18.1-18.4. The support arms are disposed at an obtuse angle with respect to the interior surface 16 of the planar annular base 11.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: December 23, 2008
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Chung-Lin Wu, Rajeev D. Joshi