Patents by Inventor Fumihiro Moriya

Fumihiro Moriya 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).

  • Semiconductor device with slot above guard ring
    Patent number: 6683329
    Abstract: A semiconductor device includes an electronic circuit, a metal guard ring surrounding the electronic circuit, and a passivation layer covering the electronic circuit and guard ring. The passivation layer has a slot extending from the surface of the device down to the guard ring. The slot prevents cracks that may form in the passivation layer at the edges of the device from propagating to the area inside the guard ring. Locating the slot over the guard ring enables the size of the device to be reduced, and enables the guard ring to keep moisture and contaminants that enter the slot from reaching lower layers of the device.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: January 27, 2004
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Fumihiro Moriya
  • Semiconductor device with slot above guard ring
    Publication number: 20030160261
    Abstract: A semiconductor device includes an electronic circuit, a metal guard ring surrounding the electronic circuit, and a passivation layer covering the electronic circuit and guard ring. The passivation layer has a slot extending from the surface of the device down to the guard ring. The slot prevents cracks that may form in the passivation layer at the edges of the device from propagating to the area inside the guard ring. Locating the slot over the guard ring enables the size of the device to be reduced, and enables the guard ring to keep moisture and contaminants that enter the slot from reaching lower layers of the device.
    Type: Application
    Filed: February 28, 2002
    Publication date: August 28, 2003
    Inventor: Fumihiro Moriya