PLUG BOARD WITH CONCENTRIC GROUNDING BELT FOR TESTING INTEGRATED CIRCUITS

摘要

A plug board for testing integrated circuits for operating characteristics and electrostatic breakdown comprises a plurality of sockets to receive therein the terminal of an integrated circuit to be tested, a plurality of contacting terminals arranged in an annular layout and electrically connected with the sockets, an annular grounding belt for grounding the contacting terminals when static charge is applied to a selected one of them, and a drive system which rotates the plug board about the center of the contacting terminals. The grounding belt may be grounded either through a brush that is mounted in sliding contact with the plug board or a metal gear wheel secured fixedly to the plug board. Electric connection between the grounding belt and the contacting terminals may be provided either through a jumper that is interconnected between one of the grounding pins provided in the grounding belt and one of the contacting terminals or a high-capacity device that is mounted at a location closely adjacent to where an integrated circuit to be tested is set.