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.

Date of Patent:
Jan. 31, 2017

Filed:

Jul. 24, 2015
Applicant:

Tessera, Inc., San Jose, CA (US);

Inventors:

Cyprian Uzoh, San Jose, CA (US);

Vage Oganesian, Palo Alto, CA (US);

Ilyas Mohammed, Santa Clara, CA (US);

Belgacem Haba, Saratoga, CA (US);

Piyush Savalia, Santa Clara, CA (US);

Craig Mitchell, San Jose, CA (US);

Assignee:

Tessera, Inc., San Jose, CA (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/03 (2006.01); H05K 1/09 (2006.01); H05K 3/40 (2006.01); H01L 23/00 (2006.01);
U.S. Cl.
CPC ...
H05K 3/4007 (2013.01); H01L 24/05 (2013.01); H05K 1/09 (2013.01); H01L 2224/04042 (2013.01); H01L 2224/056 (2013.01); H01L 2224/05083 (2013.01); H01L 2224/05139 (2013.01); H01L 2224/05144 (2013.01); H01L 2224/05147 (2013.01); H01L 2224/05155 (2013.01); H01L 2224/05164 (2013.01); H01L 2224/05169 (2013.01); H01L 2924/013 (2013.01); H01L 2924/01005 (2013.01); H01L 2924/01006 (2013.01); H01L 2924/01015 (2013.01); H01L 2924/01074 (2013.01); H05K 2201/0326 (2013.01); H05K 2201/0338 (2013.01);
Abstract

An electrical connection structure includes a variable-composition nickel alloy layer with a minor constituent selected from a group consisting of boron, carbon, phosphorus, and tungsten, wherein at least over a portion of a conductive substrate, the concentration of the minor constituent decreases throughout the variable-composition nickel alloy layer in a direction from the bottom surface of the variable-composition nickel alloy layer to the top surface of the variable-composition nickel alloy layer.


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