Patent ID: 6344161
Filing Date: 2002-02-05
Classification: B29C,H01L,Y10T

Abstract:
A method of manufacturing an encapsulated device, comprising the sequential steps of:(a) providing a substrate including a pair of opposed upper and lower major surfaces; (b) forming at least one slot extending through said substrate from said upper surface to said lower surface thereof, said at least one slot defining a device mounting area of said upper surface, said at least one slot extending substantially, but not completely, around the periphery of said device mounting area, said forming of said at least one slot comprising cutting said substrate such that burrs or flaps are formed at said upper surface thereof which seal off or at least substantially reduce the width of said at least one slot at said upper surface of said substrate; (c) positioning a said device on said upper surface of said substrate within said device mounting area, the periphery of said device being smaller than said periphery of said device mounting area; and (d) applying a liquid encapsulant material in at least the space between said device periphery and said device mounting area periphery, wherein penetration of said liquid encapsulant into said at least one slot is substantially prevented, or at least minimized, by the presence of said burrs or flaps of said at least one slot at said upper surface of said substrate.