Patent ID: 6224674
Filing Date: 2001-05-01
Classification: H01L

Abstract:
A seal coating mask for a semiconductor element comprising:a seal coating mask having a front and a back, and comprising at least one opening, said at least one opening being positioned on said seal coating mask so as to correspond with at least one semiconductor element mounted on a wiring board;an annular protrusion along an entire periphery of said at least one opening, said annular protrusion being structured and arranged to form a clearance of about 0.01 to 0.5 mm between at least a part of an entire periphery of the annular protrusion and a front surface of the wiring board when said back of said seal coating mask is positioned on the wiring board; anda space portion on the back of the seal coating mask for cutting off sealing material outside of the annular protrusion, the coating mask being used to forcibly coat a material for sealing the at least one semiconductor element in the front surface of the wiring board.