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:
Jun. 06, 2017
Filed:
Sep. 10, 2014
Applicant:
Flextronics Ap, Llc, Broomfield, CO (US);
Inventors:
Assignee:
Flextronics AP, LLC, Broomfield, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05K 1/09 (2006.01); H05K 1/11 (2006.01); H05K 3/40 (2006.01);
U.S. Cl.
CPC ...
H05K 1/092 (2013.01); H05K 1/111 (2013.01); H05K 3/4007 (2013.01); H05K 2203/043 (2013.01); H05K 2203/0736 (2013.01);
Abstract
An electrical interconnect includes a copper pillar and solder cap. The copper pillar and solder cap are formed onto a contact pad or an under bump metallurgy (UBM). In some applications, the contact pad or UBM is part of an electronic component, such as a semiconductor chip. In other cases, the contact pad is part of laminated substrate, such as a printed circuit board (PCB), or a ceramic substrate. The copper pillar and the solder cap are printed using an ink printer, such as an aerosol ink jet printer. A post heat treatment solidifies the interconnection between the contact pad or UBM, the copper pillar and the solder cap.