Patent ID: 6284565
Filing Date: 2001-09-04
Classification: B29C,B29K,H01L

Abstract:
A method of resin-encapsulating a semiconductor chip by closing a lower mold having disposed in a cavity thereof a semiconductor chip equipped with terminals or post electrodes by an upper mold via a mold-releasing film made of a polytetrafluoroethylene film between the surface on which the terminals or the post electrodes are disposed and the upper mold and then injecting a resin into the cavity of the lower mold and cured, the polytetrafluoroethylene film satisfying the conditions that the thermal shrinkage percentages in the longitudinal and width directions are 5% or lower, the difference between the thermal shrinkage percentages is within 3%, and the ratio of the elastic modulus of the longitudinal direction to the elastic modulus of the width direction is from 0.5 to 2.0 during resin encapsulating.