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:
Feb. 11, 1997
Filed:
Jun. 16, 1995
Applicant:
Inventors:
Randolph D Schueller, Austin, TX (US);
David J Windschitl, Leander, TX (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
257738 ; 257737 ; 257772 ; 257774 ; 257780 ;
Abstract
A flexible circuit construction includes a polymeric sheet, via holes in the sheet and metal circuitry disposed on the sheet. The circuitry terminates at a cantilever end partially spanning the via hole to which a solder ball is subsequently attached. The cantilever end allows the solder ball to move relative to the flexible circuit and thus compensate for misalignment and-differential thermal expansion effects.