Patent ID: 6641382
Filing Date: 2003-11-04
Classification: B29C

Abstract:
A resin encapsulation mold comprising:a lower mold, which is mounted on a lead frame, includes an indentation into which a semiconductor device is placed, and forms a gate through which resin is injected; an upper mold, in which an indentation is formed opposite the indentation of said lower mold to configure a cavity for holding said semiconductor device; a plurality of ejection pins, which protrude from the respective bottoms of the indentation of said upper mold and the indentation of said lower mold into a resin package body formed by injecting said resin from said gate into said cavity and eject said resin package body; a vertical drive mechanism, which brings into contact and separates said upper mold and said lower mold; and protrusion adjustment means for adjusting the amount of protrusion of the respective ends of the plurality of said ejection pins protruding from the respective bottoms of the indentations of said lower mold and said upper mold comprising said cavity while resin is being injected into said cavity; wherein the amount of protrusion of the plurality of said ejection pins ranges between 0 and 60 &mgr;m; and wherein said protrusion adjustment means comprises: a pin plate member, in which said ejection pins are placed so as to stand upon the surface thereof and slides up and down within a guide hole of a mold member; a spring, which acts to push/pull said ejection pins back from/towards the bottom of said cavity; and a spacing member, which is inserted into a location in contact with said plate member and said ejection pins.