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. 29, 1997
Filed:
Mar. 07, 1996
Applicant:
Inventor:
Jae C An, Seoul, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
438276 ; 438586 ; 438128 ;
Abstract
The mask ROM of the present invention is manufactured in the following processes; forming a cell array in which all the cells will be driven as on-cells, forming a groove by etching some portions of the semiconductor substrate in the drain region of the specific on-cell among the on-cells on customer's request, and then practicing a source and drain ion implantation process.
An, Jae. (1997). Method of making a mask rom with a groove (U.S. Patent No. 5624862). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5624862
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