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:
Oct. 17, 2000
Filed:
Apr. 27, 1994
Naoki Fukutomi, Yuki, JP;
Hidehiro Nakamura, Katsuta, JP;
Hajime Nakayama, Katsuta, JP;
Yoshiaki Tsubomatsu, Tsuchiura, JP;
Masanori Nakamura, Katsuta, JP;
Kouichi Kaitou, Ibaraki-ken, JP;
Atsushi Kuwano, Tsukuba, JP;
Itsuo Watanabe, Shimodate, JP;
Masahiko Itabashi, Mitsukaido, JP;
Hitachi Chemical Company, Ltd., Tokyo, JP;
Abstract
A wiring board for electrical tests; having an insulating substrate, wiring of predetermined pattern which is embedded in the insulating substrate, and bump electrodes which are formed on the wiring and which are respectively brought into contact with corresponding electrodes of an article to-be-tested. Thus, even when the electrode pitch of the article to-be-tested such as a semiconductor device has become smaller(for example, less than 0.1 [mm]), the electrodes can be formed so as to cope with the electrical tests of the article.