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:
Dec. 09, 2003
Filed:
Mar. 28, 1997
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01R 1/204 ; H05K 1/11 ;
U.S. Cl.
CPC ...
H01R 1/204 ; H05K 1/11 ;
Abstract
A circuit board having a plurality of solder bumps is provided. The solder bumps are flattened and leveled at the tops so that the coplanarity of the solder bumps is 0.5 &mgr;m or less per 1 mm. The flattened and leveled tops of the solder bumps are formed by cold pressing, hot pressing or grinding. Method of forming such solder bumps and jigs used for carrying out such methods are also provided.