Solder pads and method of making a solder pad

A device including a first solder pad and a second solder pad comprised of a post-soldering alloy composition on a substrate is provided. The alloy composition comprises two or more elements, and the post soldering alloy composition of the first solder pad has different amounts of the two or more el...

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Bibliographische Detailangaben
1. Verfasser:	DAUTARTAS MINDAUGAS F
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY MACHINE TOOLS MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRINTED CIRCUITS SEMICONDUCTOR DEVICES SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A device including a first solder pad and a second solder pad comprised of a post-soldering alloy composition on a substrate is provided. The alloy composition comprises two or more elements, and the post soldering alloy composition of the first solder pad has different amounts of the two or more elements than the alloy composition of the second solder pad. A method of making a solder pad comprises masking a substrate comprising at least a first solder pad and a second solder pad, wherein the mask exposes a greater area of the first solder pad so that the deposited element becomes part of an alloy composition of the first solder pad upon soldering thereby changing the melting point of the first solder pad.