Patent ID: 8017449
Filing Date: 2011-09-13
Classification: H01L

Abstract:
1. A method comprising: a) applying a silicone die attach adhesive composition to a substrate, b) curing the die attach adhesive composition to form a die attach adhesive, c) plasma treating a surface of the die attach adhesive, d) plasma treating a surface of a semiconductor die, e) contacting the plasma treated surface of the semiconductor die with the plasma treated surface of the die attach adhesive, f) wire bonding the semiconductor die to the substrate, g) injection molding a curable liquid silicone composition over the product of step f), where the silicone composition fills voids in the wire bonded semiconductor die and forms a hermetic seal over the substrate, thereby protecting it from environmental exposure, and optionally h) forming solder balls on a surface of the substrate opposite the die attach adhesive; where step g) comprises