Patents by Inventor Tatsuru Namatame

Tatsuru Namatame 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: 6873047
    Abstract: A method for manufacturing a semiconductor device is provided including: a step of forming a solid barrier metal layer on an interlayer insulating film; a removing step of removing at least a part of the solid barrier metal layer located at a place at which a pad opening portion is to be formed; a step of forming a solid second Al alloy film on the interlayer insulating film exposed in the removing step described above and the solid barrier metal layer; a step of patterning the solid second Al alloy film and the solid barrier metal layer so as to form a bonding pad portion on the interlayer insulating film; a step of forming a passivation film on the bonding pad portion and the interlayer insulating film; and a step of forming the pad opening portion in the passivation film at a position located on the bonding pad portion.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: March 29, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Koichi Wada, Tatsuru Namatame
  • Patent number: 6821858
    Abstract: Certain embodiments relate to semiconductor devices having an improved dielectric strength and methods for manufacturing the same. A semiconductor device 1000 may have a field effect transistor 100. The field effect transistor 100 includes a gate dielectric layer 30, a source region 32 and a drain region 34. A first semi-recessed LOCOS layer 40 may be formed between the gate dielectric layer 30 and the drain region 34. A second semi-recessed LOCOS layer 50 may be formed between the gate dielectric layer 30 and the source region 32. A first offset impurity layer 42 may be formed below the first semi-recessed LOCOS layer 40. A second offset impurity layer 52 may be formed below the second semi-recessed LOCOS layer 50.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: November 23, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuru Namatame, Kenji Yokoyama
  • Publication number: 20040222526
    Abstract: A method for manufacturing a semiconductor device is provided including: a step of forming a solid barrier metal layer on an interlayer insulating film; a removing step of removing at least a part of the solid barrier metal layer located at a place at which a pad opening portion is to be formed; a step of forming a solid second Al alloy film on the interlayer insulating film exposed in the removing step described above and the solid barrier metal layer; a step of patterning the solid second Al alloy film and the solid barrier metal layer so as to form a bonding pad portion on the interlayer insulating film; a step of forming a passivation film on the bonding pad portion and the interlayer insulating film; and a step of forming the pad opening portion in the passivation film at a position located on the bonding pad portion.
    Type: Application
    Filed: February 27, 2004
    Publication date: November 11, 2004
    Inventors: Koichi Wada, Tatsuru Namatame
  • Patent number: 6580088
    Abstract: Certain embodiments relate to semiconductor devices having an improved dielectric strength and methods for manufacturing the same. A semiconductor device 1000 may have a field effect transistor 100. The field effect transistor 100 includes a gate dielectric layer 30, a source region 32 and a drain region 34. A semi-recessed LOCOS layer 40 may be provided between the gate dielectric layer 30 and the drain region 34. An offset impurity layer 42 may be provided below the semi-recessed LOCOS layer 40.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: June 17, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuru Namatame, Kenji Yokoyama
  • Publication number: 20020003290
    Abstract: Certain embodiments relate to semiconductor devices having an improved dielectric strength and methods for manufacturing the same. A semiconductor device 1000 may have a field effect transistor 100. The field effect transistor 100 includes a gate dielectric layer 30, a source region 32 and a drain region 34. A first semi-recessed LOCOS layer 40 may be formed between the gate dielectric layer 30 and the drain region 34. A second semi-recessed LOCOS layer 50 may be formed between the gate dielectric layer 30 and the source region 32. A first offset impurity layer 42 may be formed below the first semi-recessed LOCOS layer 40.
    Type: Application
    Filed: May 1, 2001
    Publication date: January 10, 2002
    Inventors: Tatsuru Namatame, Kenji Yokoyama
  • Publication number: 20020003289
    Abstract: Certain embodiments relate to semiconductor devices having an improved dielectric strength and methods for manufacturing the same. A semiconductor device 1000 may have a field effect transistor 100. The field effect transistor 100 includes a gate dielectric layer 30, a source region 32 and a drain region 34. A semi-recessed LOCOS layer 40 may be provided between the gate dielectric layer 30 and the drain region 34. An offset impurity layer 42 may be provided below the semi-recessed LOCOS layer 40.
    Type: Application
    Filed: May 1, 2001
    Publication date: January 10, 2002
    Inventors: Tatsuru Namatame, Kenji Yokoyama