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:
Jan. 22, 2002
Filed:
Dec. 21, 1999
Fujitsu Limited, Kawasaki, JP;
Abstract
A printed circuit board is provided with a plurality of insulator layers and a plurality of conductor layers, and an outermost conductor layer has a plurality of foot patterns in outer and inner rows for mounting a BGA component and signal patterns. The width of at least a part of the signal pattern extending from the foot pattern in the outer row is greater than the width of the signal pattern extending from the foot pattern in the inner row. The printed circuit board further includes a protection layer for covering the signal patterns on the outermost conductor layer, and the protection layer has openings each for permitting the foot pattern to be exposed. At least a portion of the signal pattern appearing in the opening is widened.