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:
Jul. 20, 1999
Filed:
Sep. 10, 1997
Koichi Maari, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
This invention provides contact programmable ROM which shortens TAT. The manufacturing process comprises two steps of: (a) a step in which a plurality of memory cells having gate region 14 and source/drain regions 15A and 15B is formed on a semiconductor substrate, the first interlayer insulating layer 20 is formed on the whole surface, the first opening 21 is formed on the first interlayer insulating layer 20 above one source/drain region 15A of each memory cell, metal interconnect material 22 is filled in the first opening 21 to from a contact hole, and the second interlayer insulating layer 23 is formed over the metal interconnect material 22 and first interlayer insulating layer 20, and (b) a step in which the second opening 24 is formed on the second interlayer insulating layer 23 above the contact hole of specified memory cells, and interconnecting layer 25 is connected electrically to the contact hole is formed over the second interlayer insulating layer 23.