Abstract: A ball grid array semiconductor package including a semiconductor chip, at least one lead having one end attached to the semiconductor chip and other end bent at a predetermined angle, a wire connecting the bent lead to an electrode formed on the semiconductor chip, a first bump attached to a bent end portion of the bent lead, and a resin molding enclosing the semiconductor chip, the lead and the wire to allow one side surface of the bump to be exposed out of the resin molding.

Abstract: A lead frame etching method, which is used for a semiconductor device assembling process and prevents a sharp-edged portion formed on each lateral end of a lead frame material. The method includes the steps of forming a first photoresist pattern defining the actual etching region, on both surfaces of a lead frame material, forming a second photoresist pattern as an etching buffer extending from lateral ends of the first photoresist pattern, on both surfaces of the lead frame material on which the first photoresist pattern is formed, etching the lead frame material using the second photoresist pattern as an etching mask, removing the second photoresist pattern from the etched lead frame material, etching the lead frame material using the first photoresist pattern as an etching mask, and removing the first photoresist pattern from the twice-etched lead frame material.