Patent ID: 7549097
Filing Date: 2009-06-16
Classification: G01R,G11C,H01L

Abstract:
1. A test device for testing semiconductor integrated circuit devices each comprising a semiconductor substrate of a first conductivity type, at least two first well regions of a second conductivity type formed separately in the semiconductor substrate, integrated circuits formed on the at least two first well regions, respectively, and having different functions, potential application terminals included in the integrated circuits, respectively, each of which for receiving a different potential applied thereon, and dedicated output terminals provided in the integrated circuits, respectively, for outputting output signals, the test device comprising: for at least one of the semiconductor integrated circuit devices, a power source for applying potentials to potential application terminals of at least two of the integrated circuits; a detection circuit for detecting output data output from dedicated output terminals of the at least two of the integrated circuits to which the potentials are applied; a judgment circuit for determining whether the detected output data have a defect; and a shut-off circuit for shutting off application of a potential to a potential application terminal of an integrated circuit if output data therefrom is determined by the judgment circuit as having said defect.