JPS5718345A - Triode semiconductor element - Google Patents

Abstract

PURPOSE:To form a leadless triode semiconductor element by a method wherein the leadless triode semiconductor element is consisted of a pair of cylindrical main electrode bodies connected to both end parts of a semiconductor element, a cylindrical middle electrode body connected to the third electrode existing on the side of the element and glass tubes extending over both sides. CONSTITUTION:The glass tube body 2 is inserted on the small diametral end part 11 of the first main electrode body 1, and an electrode on the lower face of the semiconductor element body 3 is put on the upper face of the end part 11. The circular middle electrode body 4 is put on the end face of the glass tube body 2 being made to come in contact with an electrode 31 positioning at the circumference of the upper face of the electrode body 3, and a connecting electrode body 5 is connected to an electrode at the center of the upper face of the element body 3. The second glass tube 6 is put on the middle electrode body 4, and the small diametral end part 71 of the second main electrode body 7 in put on the connecting electrode body 5 inserting into the opening part. They are arranged in an assembling jig 8, and the respective parts are fusion welded to be connected. Accordingly the leadless semiconductor element solderable directly to the substrate printed with wiring can be obtained without using lead wire.