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:
Oct. 16, 2001
Filed:
Jun. 25, 1997
Vivek Amir Jairazbhoy, Farmington Hills, MI (US);
Richard Keith McMillan, II, Dearborn, MI (US);
Visteon Global Tech., Dearborn, MI (US);
Abstract
An electronic circuit assembly having anti-tombstoning solder joints, including: a substrate,having at least one mounting pad,thereon; an SMD,having at least one termination,; and at least one solder joint,connecting each termination,to its respective mounting pad,. Each solder joint,is convex in shape, having a continuous and substantially circular arcuate outer profile,and covering substantially all of the mounting pad,and substantially all of a top portion,of each termination,. Each mounting pad,has a predetermined length l,and each solder joint has a predetermined volume of solder selected such that a positive net anti-tombstoning moment is exerted upon the SMD,when at least one solder joint,is in a molten state.