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. 18, 1995
Filed:
Dec. 22, 1992
Seiichi Mimura, Tokyo, JP;
Junichiro Shimizu, Tokyo, JP;
Takayuki Tajiri, Tokyo, JP;
Shingo Ichikawa, Tokyo, JP;
Hiroyuki Kaneko, Tokyo, JP;
Masayuki Ohi, Tokyo, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A semiconductor device has circuit patterns formed on upper and lower surfaces of a laminated board with both surfaces lined with copper and interconnected by through holes, an IC chip mounted on the upper pattern, and external connection terminals mounted on the lower pattern, the external connection terminals comprising copper core bumps. According to a method of manufacturing such a semiconductor device, the same etching process as pattern etching for forming the circuit pattern are effected in bump forming regions on the circuit pattern formed by the resist pattern.