Patent ID: 6429677
Filing Date: 2002-08-06
Classification: G01R

Abstract:
An apparatus for monitoring electrical characteristics of a plurality of semiconductor devices under test (DUT), the apparatus comprising:a plurality of channel monitors, corresponding to the plurality of DUTs, said plurality of channel monitors for respectively applying a test voltage to each of the plurality of DUTs, each of said plurality of channel monitors further providing one or more measurement outputs therefrom, said one or more measurement outputs from a given channel monitor being reflective of the electrical characteristics of a corresponding one of the plurality of DUTs; a plurality of modules, said plurality of modules each containing a subset of said plurality of channel monitors therein, each of said plurality of modules further including a module-level multiplexer, each of said module-level multiplexers providing a selected module-level multiplexer output from said one or more measurement outputs inputted thereto; a plurality of cards, said plurality of cards each containing a subset of said plurality of modules therein, each of said plurality of cards further including a card-level multiplexer, each of said card-level multiplexers providing a selected card-level multiplexer output from said module-level multiplexer outputs inputted thereto; and a housing, said housing containing said plurality of cards therein, said housing further including a housing-level multiplexer, said housing-level multiplexer providing a selected housing-level multiplexer output from said card-level multiplexer outputs inputted thereto.