Patents by Inventor Akira Karashima

Akira Karashima 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: 20050127498
    Abstract: A semiconductor device comprising a semiconductor chip having an active and a passive surface, the passive surface adhesively attached to a substrate film by means of a multilayer composite; this composite comprising a metal foil having first and second surfaces and an adhesive layer attached on each of these surfaces. The multilayer composite has an average modulus larger than the modulus of the encapsulating molding compound used in the semiconductor device. By applying the composite to assembling face-up chip-scale devices, stress in solder joints is reduced and solder fatigue life enhanced.
    Type: Application
    Filed: February 3, 2005
    Publication date: June 16, 2005
    Inventors: Masazumi Amagai, Akira Karashima
  • Patent number: 6873059
    Abstract: A semiconductor device comprising a semiconductor chip having an active and a passive surface, the passive surface adhesively attached to a substrate film by means of a multilayer composite; this composite comprising a metal foil having first and second surfaces and an adhesive layer attached on each of these surfaces. The multilayer composite has an average modulus larger than the modulus of the encapsulating molding compound used in the semiconductor device. By applying the composite to assembling face-up chip-scale devices, stress in solder joints is reduced and solder fatigue life enhanced.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 29, 2005
    Assignee: Texas Instruments Incorporated
    Inventors: Masazumi Amagai, Akira Karashima
  • Patent number: 6780749
    Abstract: In semiconductor device 10 under this invention, bonding pads 20 are lined up in a staggered pattern on the main surface of semiconductor chip 14 which is mounted on insulated substrate 12. Multiple stud bumps are stacked on top of the pads 20a which are located on the inner rows, and these stud bumps comprise stud bump stack 28. Conductive wire 22 connects the lands 18 on the insulated substrate with the corresponding bonding pads 20. The wire is formed with its beginning at the land and its end at the bonding pad. Via the stud bump stacks 28, the ends of conductive wire 22a on the inner pads are in a higher position than the ends of conductive wires 22b on the outer pads, so that the problem of neighboring conductive wires coming into contact does not occur.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: August 24, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Kenji Masumoto, Mutsumi Masumoto, Akira Karashima
  • Patent number: 6768212
    Abstract: A semiconductor package according to the present invention includes a die attachment area for receiving a die attachment material and a stitch bond area for receiving a wire lead from a die. The stitch bond area is adjacent to said die attachment area on the substrate. Moreover, a stud bump is formed on the substrate for preventing the die attachment material from contacting the stitch bond area when a die is attached to the die attachment area. A method for manufacturing a semiconductor package according to the present invention also is disclosed.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: July 27, 2004
    Assignee: Texas Instruments Incorporated
    Inventors: Akira Karashima, Margaret Simmons-Matthews, Sohichi Kadoguchi
  • Publication number: 20030205725
    Abstract: In semiconductor device 10 under this invention, bonding pads 20 are lined up in a staggered pattern on the main surface of semiconductor chip 14 which is mounted on isolated substrate 12. Multiple stud bumps are stacked on top of the pads 20a which are located on the inner rows, and these stud bumps comprise stud bump stack 28. Conductive wire 22 connects the lands 18 on the isolated substrate with the corresponding bonding pads 20. The wire is formed with its beginning at the land and its end at the bonding pad. Via the stud bump stacks 28, the ends of conductive wire 22a on the inner pads are in a higher position than the ends of conductive wires 22b on the outer pads, so that the problem of neighboring conductive wires coming into contact does not occur.
    Type: Application
    Filed: April 16, 2003
    Publication date: November 6, 2003
    Inventors: Kenji Masumoto, Mutsumi Masumoto, Akira Karashima
  • Publication number: 20030137033
    Abstract: A semiconductor package according to the present invention includes a die attachment area for receiving a die attachment material and a stitch bond area for receiving a wire lead from a die. The stitch bond area is adjacent to said die attachment area on the substrate. Moreover, a stud bump is formed on the substrate for preventing the die attachment material from contacting the stitch bond area when a die is attached to the die attachment area. A method for manufacturing a semiconductor package according to the present invention also is disclosed.
    Type: Application
    Filed: January 15, 2003
    Publication date: July 24, 2003
    Inventors: Akira Karashima, Margaret Simmons-Matthews, Sohichi Kadoguchi
  • Patent number: 6583483
    Abstract: In semiconductor device 10 under this invention, bonding pads 20 are lined up in a staggered pattern on the main surface of semiconductor chip 14 which is mounted on insulated substrate 12. Multiple stud bumps are stacked on top of the pads 20a which are located on the inner rows, and these stud bumps comprise stud bump stack 28. Conductive wire 22 connects the lands 18 on the insulated substrate with the corresponding bonding pads 20. The wire is formed with its beginning at the land and its end at the bonding pad. Via the stud bump stacks 28, the ends of conductive wire 22a on the inner pads are in a higher position than the ends of conductive wires 22b on the outer pads, so that the problem of neighboring conductive wires coming into contact does not occur.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: June 24, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Kenji Masumoto, Mutsumi Masumoto, Akira Karashima
  • Publication number: 20030092215
    Abstract: A semiconductor device comprising a semiconductor chip having an active and a passive surface, the passive surface adhesively attached to a substrate film by means of a multilayer composite; this composite comprising a metal foil having first and second surfaces and an adhesive layer attached on each of these surfaces. The multilayer composite has an average modulus larger than the modulus of the encapsulating molding compound used in the semiconductor device. By applying the composite to assembling face-up chip-scale devices, stress in solder joints is reduced and solder fatigue life enhanced.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 15, 2003
    Inventors: Masazumi Amagai, Akira Karashima
  • Publication number: 20020050653
    Abstract: In semiconductor device 10 under this invention, bonding pads 20 are lined up in a staggered pattern on the main surface of semiconductor chip 14 which is mounted on isolated substrate 12. Multiple stud bumps are stacked on top of the pads 20a which are located on the inner rows, and these stud bumps comprise stud bump stack 28. Conductive wire 22 connects the lands 18 on the isolated substrate with the corresponding bonding pads 20. The wire is formed with its beginning at the land and its end at the bonding pad. Via the stud bump stacks 28, the ends of conductive wire 22a on the inner pads are in a higher position than the ends of conductive wires 22b on the outer pads, so that the problem of neighboring conductive wires coming into contact does not occur.
    Type: Application
    Filed: July 19, 2001
    Publication date: May 2, 2002
    Inventors: Kenji Masumoto, Mutsumi Masumoto, Akira Karashima
  • Patent number: 6225703
    Abstract: The purpose of the present invention is to reduce the warpage of the semiconductor package caused by thermal contraction. According to the present invention, semiconductor device (9) has plate-shaped member (7) which is positioned on a surface of semiconductor chip (1) and is sealed together with semiconductor chip (1) with molding resin (8). Said plate-shaped member (7) has a linear expansion coefficient that is less than the linear expansion coefficient of the aforementioned molding resin. By placing a plate-shaped member with a small linear expansion coefficient on semiconductor chip (1), it is possible to reduce the thermal contraction on the upper side of the semiconductor chip. Also, the presence of the plate-shaped member on the semiconductor chip leads to substantial reduction in the thickness of the molding resin on the semiconductor chip. The pulling force due to contraction of the molding resin that leads to warping is proportional to the thickness of the molding resin.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: May 1, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Norito Umehara, Chikara Azuma, Akira Karashima
  • Patent number: 5920116
    Abstract: In semiconductor device fabrication, warping of the support pins must be prevented so that the semiconductor element can be properly positioned during the wire-bonding and resin-sealing processes. The invention provides a process in which a V-shaped groove 33, for example, is formed in the mounting pad 31 and the support pins 32, imparting rigidity to the support pins 32.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: July 6, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Norito Umehara, Akira Karashima
  • Patent number: 4870474
    Abstract: A lead frame composed of an outer frame and inner lead frame portions formed as an integral frame wherein each lead frame portion directly joins the outer frame at some of the four corners of the lead frame portion with circuitous bridges interposed for fixation of the lead frame portion to the outer frame at each of the other corners.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: September 26, 1989
    Assignee: Texas Instruments Incorporated
    Inventor: Akira Karashima