Patent ID: 7902647

Claim:
A tape automated bonding (TAB) package comprising: a base film; a plurality of output leads formed on the base film, at least one of the output leads comprising an inner lead portion and a corresponding outer lead portion; a semiconductor die mounted on the base film and connected to the inner lead portion through a solder ball; and a solder resist film formed on the outer lead portion, wherein the outer lead portion comprises: an end portion adjacent to an edge of the base film, the end portion having a first width; a terminal portion adjacent to the inner lead portion, the terminal portion having a second width; and a transition region disposed between the end portion and the terminal portion, the transition region having a third width that varies from the first width to the second width, wherein the solder resist film covers at least a part of the terminal portion and exposes at least a part of the transition region, and wherein the base film is bent at a position on which the transition region is formed.