SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a technology for salvaging products with less margin as well as for reducing defects after mounting. SOLUTION: To salvage products with less margin by trimming the level of the internal voltage based on discrimination result of first discriminating means (21-23). It is judged whether the internal voltage is within a tolerable range after trimming by the trimming means (16-18). A control means (29) forcedly forms a defective state by losing a part of intrinsic function of a chip based on the discrimination result of second discriminating means (21-23). Thus, a chip which is not salvaged by trimming is forcedly made defective before mounting, for reduced defects after mounting.