The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2005
Filed:
Jun. 06, 2002
Kazushige Ayukawa, Kokubunji, JP;
Seiji Miura, Hachioji, JP;
Tetsuya Iwamura, Akiruno, JP;
Kouichi Hoshi, Fussa, JP;
Yoshikazu Saitou, Hamura, JP;
Kazushige Ayukawa, Kokubunji, JP;
Seiji Miura, Hachioji, JP;
Tetsuya Iwamura, Akiruno, JP;
Kouichi Hoshi, Fussa, JP;
Yoshikazu Saitou, Hamura, JP;
Hitachi ULSI Systems Co, Ltd., Tokyo, JP;
Renesas Technology Corporation, Tokyo, JP;
Abstract
A non-volatile memory, an SRAM, a DRAM and a control circuit are module-formed into a single packaged. The control circuit assigns addresses to the SRAM and addresses to the DRAM and data necessary to be held for a long period of time is saved in the SRAM. Two chips of DRAM are mapped to the same address space and refreshed alternately. The plural chips are arranged such that they are mutually laminated, and they are wired by means of a BGA or inter-chip bonding.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile