Patent ID: 6559524
Filing Date: 2003-05-06
Classification: H01L

Abstract:
A COF-use tape carrier, which is a tape carrier for mounting a semiconductor chip thereon by a chip-on-film method, comprising:a flexible insulating tape; a wiring pattern formed on the insulating tape, the wiring pattern including inner leads and outer leads; a solder resist covering the inner leads, the solder resist having an opening in a portion corresponding to a semiconductor chip-mounting region of the insulating tape, with portions of the inner leads to be electrically connected to a semiconductor chip being exposed from the opening of the solder resist; and one or more dummy leads formed in the proximity of an edge of the opening of the solder resist, the dummy leads being not to be electrically connected to the semiconductor chip, wherein some spaces between adjacent two inner leads are wide and others are narrow, and the dummy lead is formed between adjacent two inner leads that are widely spaced from each other.