Patent ID: 6144108
Filing Date: 2000-11-07
Classification: C09J,H01L

Abstract:
A resin sealing semiconductor device with a semiconductor element sealed by a sealing resin, wherein a first metallic foil is bonded through adhesive to a bottom of a lead frame with the semiconductor element mounted thereon, and a second metallic foil is fixed to the outer surface of the sealing resin on the side of the semiconductor element, and wherein the lead frame is made of an iron-nickel alloy, the first metallic foil bonded to the bottom of the lead frame through the adhesive has a linear expansion coefficient of 0.4-2.7.times.10.sup.-5 /.degree. C., and the second metallic foil fixed to the outer surface of the sealing resin on the side of the semiconductor element has a linear expansion coefficient of 0.4-0.8.times.10.sup.-5 /.degree. C. and a thickness of 2-10 times as large as that of the first metallic foil on the bottom of the lead frame.