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. 03, 2001
Filed:
Oct. 27, 1998
David Light, Los Gatos, CA (US);
John W. Smith, Palo Alto, CA (US);
Thomas H. DiStefano, Monte Sereno, CA (US);
David R. Baker, Cupertino, CA (US);
Hung-Ming Wang, San Jose, CA (US);
Tessera, Inc., San Jose, CA (US);
Abstract
A layered lead is disclosed including a layer of structural material which has top and bottom sides, a layer of fatigue-resistant material on the top and bottom surfaces and a layer of bonding material covering the fatigue-resistant layer on the bottom surface for connection to a contact on a chip. An asymmetrical distribution of bonding material on the top and bottom sides may be used to provide reinforcement of the lead against stress. The fatigue-resistant material also acts as a barrier against diffusion between the metal layers.