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:
Aug. 14, 1990
Filed:
Jan. 30, 1989
Marc K Chason, Schaumburg, IL (US);
Michael J Onystok, Bloomingdale, IL (US);
Nathan P Bellin, Chicago, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An electrical joint using spheroidal tipped leads improves the strength of a connection regardless of the material used to bond the connections. Axial leads of a component are formed into spheroids using an appropriate heat source to melt a small portion of the lead tip. Melting a portion of the lead alloys the lead with any non-wettable solder mask rendering a wettable spheroid. Surface tension in the molten metal forms the spheroid. The spheroid increases the area to which solder or other bonding agent adheres to. Solder mask remaining on the lead decreases solder wicking further up the lead. Reduced solder wicking retains the compliance of the lead. Controlled melting of the lead maintains planarity for multileaded components.