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:
Oct. 20, 1998
Filed:
Mar. 03, 1993
Applicant:
Inventors:
Yutaka Hayashi, Tsukuba, JP;
Yoshikazu Kojima, Tokyo, JP;
Ryoji Takada, Tokyo, JP;
Masaaki Kamiya, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
257316 ; 257317 ; 257319 ; 257321 ; 257322 ;
Abstract
The semiconductor nonvolatile memory has integrated memory cells, each being operative to carry out writing and reading of information in random-access basis and having an electric charge storage structure effective to memorize the information in nonvolatile state. The information is temporarily written into each memory cell in volatile state, and thereafter the temporarily written information is written at one into the respective electric charge storage structure of each memory cell, thereby effecting quick writing of nonvolatile information into the respective memory cells of multi-bits.