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. 19, 1994
Filed:
Oct. 19, 1992
Applicant:
Inventors:
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257758 ; 257700 ; 257701 ; 257734 ; 257750 ; 257752 ;
Abstract
An object of the present invention is to match impedance of each portion of whole lines of a signal wiring with the integrated circuit mounted on the package. All ground planes are deleted within a region vertically under/above a connection pad provided on the top- or bottom-surface of a polyimide multilayer part, whereby no capacitance is generated between the connection pad and the ground planes, so that the impedance of the signal wiring within the region right under/above the connection pad is prevented from being lowered.