Patent ID: 7745321
Filing Date: 2010-06-29
Classification: H01L,H05K

Abstract:
1. A method of forming a solder contact to a substrate, the method comprising: providing a first field on a surface of the substrate, wherein the first field impedes a wetting by a solder material; providing a second field on the surface of the substrate, wherein the second field is wettable by the solder material; providing a structured layer on the surface, wherein the structured layer comprises an opening to the substrate, and wherein the opening, at least in part, exposes both the first field and the second field; filling the opening with the solder material, whereby the solder material is brought into contact with the first field and the second field; and liquefying the solder material, whereby the solder material is pulled from the first field, and a portion of the solder material is caused to protrude from the opening, wherein the portion of the solder material forms the solder contact.