Patent ID: 6658637
Filing Date: 2003-12-02
Classification: G11C,H03K

Abstract:
A semiconductor device trimming method for use with a semiconductor device:said semiconductor device including: a regular cell array having a plurality of cells arranged in a matrix constituted by a plurality of first lines and by a plurality of second lines intersecting said first lines; first address lines for selecting cells on each of said first lines in said regular cell array; second address lines for selecting cells on each of said second lines in said regular cell array; a spare cell array having a plurality of cells arranged on at least one spare line corresponding to said first lines; a fuse array including a plurality of fuses; and a spare decoder which, connected to said fuse array, inhibit selection of cells on at least one of said first lines in said regular cell array in accordance with blow modes of said fuse array and which permit selection of cells on at least one of said spare lines in said spare cell array in order to replace the inhibited first line; said semiconductor device trimming method being used selectively to blow fuses so as to impart said blow modes to said fuse array, said method comprising the steps of: preparing a trimming table which lists all address modes of address signals for said first address lines and the blow mode of said fuse array corresponding to each of the address modes; and selectively blowing fuses in said fuse array according to the blow mode corresponding to at least one of said first lines of which the selection has been inhibited in said regular cell array in accordance with said trimming table.