Patent ID: 8734657
Filing Date: 2014-05-27
Classification: C04B,H01L,Y10T

Abstract:
1. A solder barrier substrate comprising: an insulating substrate having a metallization layer on a top surface of the insulating substrate; a base layer on a top surface of the metallization layer; a patterned contact layer on a portion of a top surface of the base layer, the top surface of the patterned contact layer having a wettability greater than a wettability of the top surface of the base layer; and a solder barrier defined by a boundary between (i) the patterned contact layer and (ii) a portion of the top surface of the base layer adjacent to the portion of the top surface of the base layer that includes the patterned contact layer, wherein the base layer comprises a metal and the to surface of the base layer comprises an oxide of the metal, and wherein the metal comprises nickel and the patterned contact layer comprises gold.