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:
Apr. 30, 2002
Filed:
Oct. 16, 2000
Hiroyuki Yoshioka, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention is a contact film for making electrical contact with a ball grid array device in which a plurality of solder balls is deployed in a lattice configuration as external terminals, comprising: a first elastic insulating film having multiple contact openings provided at positions corresponding to the solder balls, and first contact patterns for making first contact with the solder balls about the peripheries of the openings; and a second elastic insulating film, laminated to the first elastic insulating film, having second contact patterns for making second contact with the solder balls through the openings at positions corresponding to the openings; wherein it is possible to verify the electrical contact of the solder balls by whether or not there is electrical continuity between the first and the second contact patterns.