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. 01, 2019

Filed:

Nov. 05, 2015
Applicants:

International Business Machines Corporation, Armonk, NY (US);

Intrinsiq Materials Ltd., London, GB;

Technische Universitaet Chemnitz, Chemnitz, DE;

Sintef, Trondheim, NO;

Inventors:

Thomas J. Brunschwiler, Rueschlikon, CH;

Richard Dixon, London, GB;

Maaike M. Visser Taklo, Oslo, NO;

Bernhard Wunderle, Chemnitz, DE;

Kerry Yu, London, GB;

Jonas Zuercher, Rueschlikon, CH;

Assignees:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/48 (2006.01); H01L 23/00 (2006.01);
U.S. Cl.
CPC ...
H01L 24/81 (2013.01); H01L 24/03 (2013.01); H01L 24/08 (2013.01); H01L 24/11 (2013.01); H01L 24/13 (2013.01); H01L 24/27 (2013.01); H01L 24/29 (2013.01); H01L 24/73 (2013.01); H01L 2224/05647 (2013.01); H01L 2224/08238 (2013.01); H01L 2224/13147 (2013.01); H01L 2224/1607 (2013.01); H01L 2224/16227 (2013.01); H01L 2224/2957 (2013.01); H01L 2224/29647 (2013.01); H01L 2224/8384 (2013.01);
Abstract

A method for electrically coupling a pad and a front face of a pillar, including shaping the front face pillar, the front face having at least partially a convex surface, applying a suspension to the front face or to the pad, wherein the suspension includes a carrier fluid, electrically conducting microparticles and electrically conducting nanoparticles, arranging the front face of the pillar opposite to the pad at a distance such that the carrier fluid bridges at least partially a gap between the front face of the pillar and the pad, evaporating the carrier fluid thereby confining the microparticles and the nanoparticles, and thereby arranging the nanoparticles and the microparticles as percolation paths between the front face of the pillar and the pad, and sintering the arranged nanoparticles for forming metallic bonds at least between the nanoparticles and/or between the nanoparticles and the front face of the pillar or the pad.


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