Patents by Inventor Navinchandra Kalidas

Navinchandra Kalidas 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: 7795072
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: September 14, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Michael A. Lamson, Navinchandra Kalidas
  • Publication number: 20080195990
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Application
    Filed: April 9, 2008
    Publication date: August 14, 2008
    Inventors: Michael A. Lamson, Navinchandra Kalidas
  • Patent number: 7309648
    Abstract: Disclosed is a semiconductor device that includes an electrically insulating, sheet-like substrate with first and second surfaces, at least one opening, and a certain thickness. On the first surface are a plurality of electrically conductive routing strips and a plurality of contact pads; at least one of the contact pads is electrically connected with at least one of the routing strips, and may have a solder body attached. A semiconductor chip is positioned in the opening while leaving a gap to the substrate; the chip has an active surface including at least one bond pad, and a passive surface substantially coplanar with the second substrate surface. Substrate thickness and chip thickness may be substantially equal. Bonding elements bridge the gap to connect electrically bond pad and routing strip.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: December 18, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Jeremias P Libres, Michael P Pierce
  • Publication number: 20070020808
    Abstract: Disclosed is a semiconductor device that includes an electrically insulating, sheet-like substrate with first and second surfaces, at least one opening, and a certain thickness. On the first surface are a plurality of electrically conductive routing strips and a plurality of contact pads; at least one of the contact pads is electrically connected with at least one of the routing strips, and may have a solder body attached. A semiconductor chip is positioned in the opening while leaving a gap to the substrate; the chip has an active surface including at least one bond pad, and a passive surface substantially coplanar with the second substrate surface. Substrate thickness and chip thickness may be substantially equal. Bonding elements bridge the gap to connect electrically bond pad and routing strip.
    Type: Application
    Filed: September 6, 2006
    Publication date: January 25, 2007
    Applicant: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Jeremias Libres, Michael Pierce
  • Patent number: 7135781
    Abstract: Disclosed is a semiconductor device that includes an electrically insulating, sheet-like substrate (301) with first and second surfaces (301a, 301b), at least one opening (310), and a certain thickness (302). On the first surface are a plurality of electrically conductive routing strips and a plurality of contact pads (330); at least one of the contact pads is electrically connected with at least one of the routing strips, and may have a solder body (901) attached. A semiconductor chip (102) is positioned in the opening while leaving a gap (311) to the substrate; the chip has an active surface (102a) including at least one bond pad (103), and a passive surface (102b) substantially coplanar with the second substrate surface (301b). Substrate thickness and chip thickness may be substantially equal. Bonding elements (501) bridge the gap to connect electrically bond pad and routing strip.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: November 14, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Jeremias P. Libres, Michael P. Pierce
  • Publication number: 20060185895
    Abstract: An insulating substrate comprises an orderly and repetitive arrangement of a plurality of metal pads (320, 321) of about the same size interconnected by conductive traces (330), wherein these traces form parallel equidistant rows. The plurality of pads is divided in sub-arrays (380, 381) of equal numbers of pads. The pads in each sub-array are positioned so that the corresponding pad of each following row is located at a predetermined angle (370) relative to the corresponding pad of the preceding row, and the angle is selected for minimizing the pitch of the traces, center to center, and maximizing the pad density. Further, the respective traces of each sub-array are connected so that the pads of one sub-array are positioned as the mirror image of the pads of the adjacent sub-arrays.
    Type: Application
    Filed: February 24, 2005
    Publication date: August 24, 2006
    Inventor: Navinchandra Kalidas
  • Publication number: 20060063304
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Application
    Filed: November 7, 2005
    Publication date: March 23, 2006
    Inventors: Michael Lamson, Navinchandra Kalidas
  • Publication number: 20060033219
    Abstract: A semiconductor device comprising an electrically insulating, sheet-like substrate (301) with first and second surfaces (301a, 301b), at least one opening (310), and a certain thickness (302). On the first surface are a plurality of electrically conductive routing strips and a plurality of contact pads (330); at least one of the contact pads is electrically connected with at least one of the routing strips, and may have a solder body (901) attached. A semiconductor chip (102) is positioned in the opening while leaving a cap (311) to the substrate; the chip has an active surface (102a) including at least one bond pad (103), and a passive surface (102b) substantially coplanar with the second substrate surface (301b). Substrate thickness and chip thickness may be substantially equal. Bonding elements (501) bridge the gap to connect electrically bond pad and routing strip.
    Type: Application
    Filed: August 10, 2004
    Publication date: February 16, 2006
    Inventors: Navinchandra Kalidas, Jeremias Libres, Michael Pierce
  • Patent number: 6995037
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Grant
    Filed: December 1, 2003
    Date of Patent: February 7, 2006
    Assignee: Texas Instruments Incorporated
    Inventors: Michael A. Lamson, Navinchandra Kalidas
  • Publication number: 20050093170
    Abstract: An integrated interconnect package for a semiconductor die and a method for assembling the die into the integrated interconnect package. The method may comprise placing the active face of the die onto an adhesive disposed on a sacrificial carrier, and applying an encapsulant over the backside of the die, forming a substantially rigid assembly structure. The assembly structure is separated from the adhesive, and an insulating material is applied to the active face of the die and patterned by a photolithography operation, creating at least one opening through the insulating material for exposing at least one die bond pad. A conductive material is then applied over the insulating material, flowing into the openings to contact the bond pads. The conductive material is then patterned by a photolithography operation, removing at least a portion of the conductive material to create a plurality of electrical traces and package terminals.
    Type: Application
    Filed: October 29, 2003
    Publication date: May 5, 2005
    Applicant: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Jeremias Libres
  • Patent number: 6794743
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: September 21, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Michael A. Lamson, Navinchandra Kalidas
  • Publication number: 20040108586
    Abstract: A high-performance, high I/O ball grid array substrate, designed for integrated circuit flip-chip assembly and having two patterned metal layers, comprising: an insulating layer having a first surface, a second surface and a plurality of vias filled with metal. Said first surface having one of said metal layers attached to provide electrical ground potential, and having a plurality of electrically insulated openings for outside electrical contacts. An outermost insulating film protecting the exposed surface of said ground layer, said film having a plurality of openings filled with metal suitable for solder ball attachment. Said second surface having the other of said metal layers attached, portions thereof being configured as a plurality of electrical signal lines, further portions as a plurality of first electrical power lines, and further portions as a plurality of second electrical power lines, selected signal and power lines being in contact with said vias.
    Type: Application
    Filed: December 1, 2003
    Publication date: June 10, 2004
    Inventors: Michael A. Lamson, Navinchandra Kalidas
  • Patent number: 6396136
    Abstract: A package for a flip chip integrated circuit including an interposer with electrical interconnecting for signal, power, and ground contacts. Routing is accomplished on only two conductor layers through the use of selective planes and buses. Multiple power planes are provided on a single conductor level to support circuits having different operating voltages. A unique cavity down BGA package for a flip chip interconnected integrated circuit is provided by adhering the interposer to a thermally conductive stiffener or base, and using solder balls to attach the frame to the base and interposer. The assemblage forms a chip cavity with interconnecting vias to external BGA solder balls terminals located in the perimeter frame.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: May 28, 2002
    Assignee: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Masood Murtuza, Raymond W. Thompson
  • Publication number: 20010013654
    Abstract: A package 300 for a flip chip integrated 331 circuit including an interposer 303 with electrical interconnecting for signal, power, and ground contacts. Routing is accomplished on only two conductor layers through the use of selective planes and buses. Multiple power planes are provided on a single conductor level to support circuits having different operating voltages. A unique cavity down BGA package for a flip chip interconnected integrated circuit is provided by adhering the interposer to a thermally conductive stiffener or base 304, and using solder balls 308 to attach the frame to the base and interposer. The assemblage forms a chip cavity with interconnecting vias to external BGA solder balls terminals located in the perimeter frame.
    Type: Application
    Filed: December 22, 1999
    Publication date: August 16, 2001
    Inventors: NAVINCHANDRA KALIDAS, MASOOD MURTUZA, RAYMOND W THOMPSON
  • Patent number: 6084777
    Abstract: A ball grid array package (10) is provided that includes a heat spreader (14), a stiffener (13), a substrate (16), and a die or chip (12). The stiffener (13) is mounted to the heat spreader (14) and has a cavity formed therein. The stiffener (13) may serve as either a ground plane or a power plane of ball grid array package (10), depending on the desired implementation. The substrate (16) includes a signal plane (30) and a power bus (28) on a first surface and has a cavity formed therein. The substrate (16) is mounted to the stiffener (13) through a second surface. The substrate (16) further having at least one hole formed from the first surface to the second surface and a plurality of solder balls, similar to solder ball (20), to provide an external connection to the ball grid array package (10).
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: July 4, 2000
    Assignee: Texas Instruments Incorporated
    Inventors: Navinchandra Kalidas, Nozar Hassanzadeh, Michael A. Lamson
  • Patent number: 5976914
    Abstract: In accordance with the invention, integrated circuit dies may be packaged in a plastic package employing an area area array technology such as a conductive ball grid array, column grid array or pin grid array. One aspect of the invention is an integrated circuit package (10) which includes an electronic circuit enclosed by a plastic body (12, 14). The molded plastic body has a first major surface opposing a second major surface. The first major surface of integrated circuit (10) has a plurality of openings therein. One of a plurality of conductive pads (18) is adjacent to each one of the openings and is electrically connected to the electronic circuit. Each of a plurality of conductors (20) is electrically connected to one of the pads (18) and protrudes from one of the openings (22).
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: November 2, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: John H. Abbott, Navinchandra Kalidas, Raymond W. Thompson
  • Patent number: 5895967
    Abstract: A ball grid array package (62) having a deformable metal layer (20) is provided that includes a heat spreader (60), a stiffener (40) having a cavity and mounted to the heat spreader (60), a substrate (22), and a die (50). The substrate (22) includes a dielectric layer (10) with a cavity and cut-outs, the deformable metal layer (20), and a plurality of electrical traces for connection to solder balls. The dielectric layer (10) couples to the stiffener (40) through a second side and to the deformable metal layer (20) through the first side. The deformable metal layer (20) includes a cavity, a power ring (26), a ground ring (24), and a plurality of traces serving as either a ground connection, a signal connection, or a power connection for coupling with the plurality of solder balls.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: April 20, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: William P. Stearns, Nozar Hassanzadeh, Navinchandra Kalidas
  • Patent number: 5777382
    Abstract: In accordance with the invention, integrated circuit dies may be packaged in a plastic package employing an area area array technology such as a conductive ball grid array, column grid array or pin grid array. One aspect of the invention is an integrated circuit package(10) which includes an electronic circuit enclosed by a plastic body (12, 14). The molded plastic body has a first major surface opposing a second major surface. The first major surface of integrated circuit (10) has a plurality of openings therein. One of a plurality of conductive pads (18) is adjacent to each one of the openings and is electrically connected to the electronic circuit. Each of a plurality of conductors (20) is electrically connected to one of the pads (18) and protrudes from one of the openings (22).
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: July 7, 1998
    Assignee: Texas Instruments Incorporated
    Inventors: John H. Abbott, Navinchandra Kalidas, Raymond W. Thompson
  • Patent number: 4540226
    Abstract: An electronic connection socket for connecting an electronic package and including a body of nonconductive material, an electronic device fabricated upon a semiconductor substrate located upon the body. The electronic device includes several bonding pads. The socket includes a set of pins to provide interconnection to external electronic devices. The body also includes pin sockets providing interconnection to the electronic package. The pins and pin sockets of the body are also connected to the bonding pads of the electronic device. To provide the electrical interconnection between the electronic package, the electronic device located upon the semiconductor substrate in the socket body and the external circuitry connected to the body.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: September 10, 1985
    Assignee: Texas Instruments Incorporated
    Inventors: Raymond W. Thompson, Navinchandra Kalidas, John H. Abbott, David S. Laffitte