SEMICONDUCTOR DEVICE

PURPOSE:To improve the moisture vapor resistance reliability of the title device by a method wherein a gel filtering agent whose volume expands when it absorbs moisture contents is injected between a resin and leads so as to improve its adhesion to the resin and to prevent permeation of moisture contents thereafter. CONSTITUTION:A gel filtering agent 5 injected between a resin 2 and leads 6 absorbs moisture contents from the outside and expands in volume, so that the adhesion to the resin increases to prevent the peameance of moisture contents thereafter. The used gel filtering agent is a bead-form gel having a three-dimensional network structure obtained by crosslinking sephadex dextran by use of epichlorohydrine. As there are a plurality of hydrophilic radicals inside its structure, it has strong hydrophilic properties and easily swells with water. As an application embodiment, a dam for injecting the gel filtering agent 5 is arranged between the leads 6 and the resin 2a and the lead frame is formed into a recessed form for injecting the gel filtering agent.