Patent ID: 6593221
Filing Date: 2003-07-15
Classification: C23C,H01L,Y10T

Abstract:
A method for forming a portion of a semiconductor device, comprising:forming at least one semiconductor device having an active surface and a back side surface, said at least one semiconductor device having at least one source, at least one drain, and at least one gate; forming conductive metallization on at least a portion of said active surface connected to one of said at least one source, said at least one drain, and said at least one gate, said conductive metallization including at least one bond pad; depositing a passivation layer over at least a portion of said active surface, said passivation layer having at least one bond pad opening therethrough to a portion of said conductive metallization; immersing said at least one semiconductor device in an aqueous solution comprising a hexafluoro acid of a semiconductor material and an oxide of said semiconductor material, said aqueous solution buffered for becoming supersaturated in said oxide; depositing said supersaturated oxide as a passivation layer on said back side surface of said at least one semiconductor device; and immersing said at least one semiconductor device in an electroless bath for plating a coating over at least a portion of said at least one bond pad, said coating including a solder wettable coating.