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:
Nov. 02, 2021
Filed:
Mar. 20, 2019
Applicant:
Konica Minolta Laboratory U.s.a., Inc., San Mateo, CA (US);
Inventors:
Karsten Bruening, Portola Valley, CA (US);
Jun Amano, Hillsborough, CA (US);
Assignee:
KONICA MINOLTA LABORATORY U.S.A., INC., San Mateo, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K 3/40 (2006.01); H05K 3/30 (2006.01); H01L 33/32 (2010.01); H01L 33/24 (2010.01); H01L 27/15 (2006.01); H05K 1/18 (2006.01);
U.S. Cl.
CPC ...
H05K 3/4007 (2013.01); H05K 3/303 (2013.01); H01L 27/156 (2013.01); H01L 33/24 (2013.01); H01L 33/32 (2013.01); H05K 1/181 (2013.01); H05K 2201/0215 (2013.01); H05K 2201/0221 (2013.01); H05K 2201/10674 (2013.01); H05K 2203/0783 (2013.01);
Abstract
A fabrication method achieves bump bonds (to connect two electronic devices) with a pitch of less than 20 μm using UV-curable conductive epoxy resin cured with an array of nano-LEDs. Nano-LEDs are devices with sizes less than or equal to 5 μm, typically arranged in an array. After deposition of the uncured conductive epoxy layer, the nano-LED array enables a fast curing of the bumps with high spatial resolution. Next, the uncured resin is washed off and the chips are assembled, before final thermal curing takes place.