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:
Nov. 27, 2001
Filed:
May. 11, 2000
Applicant:
Inventors:
Kiyoshi Shimizu, Tanashi, JP;
Yoshihiro Ishida, Tanashi, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 3/40 ;
U.S. Cl.
CPC ...
H05K 3/40 ;
Abstract
The contours of openings of a solder resist defining exposed portions of electrode pads and the contours of openings of the solder resist defining the contours of register or patterns are simultaneously formed by photolithography using the same mask pattern. As a result, the patterns for registration can be easily formed on a main board or circuit boards. Also, it is possible to increase the positional accuracy of the register or patterns relative to the positions of the electrode pads.