Patent ID: 6791174
Filing Date: 2004-09-14
Classification: H01L

Abstract:
A semiconductor device comprising:a casing; a semiconductor device connected electrically by a bonding wire within said casing; a gel resin filled in the casing and serves for insulation covering of the semiconductor device and said bonding wire; and a board-shaped vibration limiting member that is disposed in the place where it limits the vibrations of said gel resin by being attached to said gel resin, and is provided with a plurality of perforations each having an air inlet and an air outlet for the purpose of purging air entrained during the filling of the gel resin; wherein a sectional area of the air inlet of each of the perforations is larger than a sectional area of the air outlet and is reduced gradually toward the end of each of the perforations where the air outlet is formed, thus causing the perforations to have the form of a substantially conical trapezoid as a whole.