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. 29, 2000
Filed:
Feb. 01, 1999
Applicant:
Inventors:
Johnny Yang, Hsinchu, TW;
Hsiu-Wen Huang, Kaoshiung, TW;
Assignee:
United Semiconductor Corp., Hsinchu, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257306 ; 257402 ; 257345 ; 257344 ; 257409 ;
Abstract
A triple well structure for an embedded dynamic random access memory uses an ion implantation performed on a portion of the first conductive type substrate between a second conductive type source and a second conductive type deep well. A first conductive type block region is formed between the second conductive type source and the second conductive type deep well.