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. 03, 1998
Filed:
Sep. 03, 1996
Reed A George, Chandler, AZ (US);
Dennis Brian Miller, Barrington, IL (US);
Motorola Corporation, Schaumburg, IL (US);
Abstract
Solder paste (16) is dispensed onto a platen (12) that includes depressions (14) that are preferably conical or in an inverted pyramid shape. The solder paste (16) is formed of a plurality of particles composed of a solder alloy. Excess solder paste (16) is removed, and a predetermined solder paste volume fills the depressions (14). A substrate (18) is superposed onto platen (12) such that solder-wettable bond pads (20) on the substrate (18) register with the depressions (14). The platen (12) is heated to melt the solder alloy, and the solder alloy coalesces to form molten solder droplets (22). The solder droplets (22) are transferred onto the solder-wettable bond pads (20) to form solder bumps (24) bonded to the bond pads (20).