Patent ID: 6459284
Filing Date: 2002-10-01
Classification: G01R,G09G,G11C

Abstract:
A test device for testing a semiconductor device having a periodic wiring structure, comprising:magnetic force line detecting means comprising the magnetic force line detecting means is a one-dimensional magnetic force line detecting element array in which a plurality of magnetic force line detecting elements, for detecting magnetic force lines generated from the semiconductor device, are arranged in one line, said magnetic force line detecting means sampling and detecting at multiple points and at predetermi ed intervals magnetic force lines in a periodic distribution pattern generated from the semiconductor device, said semiconductor device comprising, (a) a current source, (b) a current source connector for simultaneously connecting at one end each of said plurality of periodically disposed wiring lines to the current source, and (c) a ground connector for simultaneously connecting the other end of each of said plurality of periodically disposed wiring lines to ground, wherein said current source connector and said ground connector provide current paths for the current source and generate magnetic force lines in a periodic distribution pattern from currents flowing in said plurality of wiring lines; moving means for moving the magnetic force line detecting means along the surface of the semiconductor device on which the wiring lines are provided wherein the moving means moves the one-dimensional magnetic force line detecting element array in the direction perpendicular to the direction of the array of the magnetic force line detecting elements along the surface of the semiconductor device on which the wiring lines are provided; and pattern judging means for judging the periodic distribution pattern of the magnetic force lines detected by the magnetic force line detecting means.