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:
Apr. 13, 2004
Filed:
Mar. 22, 2002
Applicant:
Inventor:
Thomas Grassl, Freising, DE;
Assignee:
Giesecke & Devrient GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 5/06 ;
U.S. Cl.
CPC ...
G11C 5/06 ;
Abstract
In a semiconductor memory chip module ( ′) for a smart card, a nonvolatile memory chip (EEPROM) ( ) and a volatile memory chip (SRAM) ( ) are stacked and coupled directly by vertical chip interconnections ( ). The rapid-access volatile memory permits fast execution of programs. Permanent and safe storage of data is effected by reloading the data to the nonvolatile memory. A chip ( ) with decoder circuits can be contained in a further level. Likewise integrated into a chip is a buffer capacitor ( ) which is constantly recharged to a constant supply voltage during operation.