Patent ID: 6635209
Filing Date: 2003-10-21
Classification: B29C,H01L

Abstract:
A method for encapsulating a substrate-based package assembly including a substrate and an electrically-insulative layer formed over one surface of the substrate, the method comprising the steps of:(1) preparing a molding tool having a predefined cavity; (2) forming a cutaway portion in the electrically-insulative layer along a scam line between the electrically-insulative layer and the solid part of the molding tool that would exist between the electrically-insulative layer and the solid part of the molding tool when the substrate-based package assembly is fixed in position in the molding tool, the cutaway portion being dimensioned to a predetermined height and a predetermined width; (3) fixing the substrate-based package assembly in the cavity of the molding tool, with the cutaway portion defining a constricted flow passage between the substrate and the solid part of the molding tool; and (4) injecting an encapsulation material into the cavity of the molding tool for the purpose of molding an encapsulation body for encapsulating the substrate-based package assembly, wherein the flow of the encapsulation material within the constricted flow passage is retarded in speed and increased is viscosity.