Patent ID: 7432128
Filing Date: 2008-10-07
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, the semiconductor device including a die pad, a first external terminal, a second external terminal, and first to fourth semiconductor chips having a same structure, each said semiconductor chip having a first electrode pad along a first side on its upper face, a second electrode pad along an opposite second side on the upper face, and a third electrode pad along the second electrode pad on the upper face and electrically connected with the first electrode pad, the method comprising: securing a lower face of the first semiconductor chip on the die pad; securing a lower face of the second semiconductor chip on the upper face of the first semiconductor chip, with the first side of the second semiconductor chip protruding from the first side of the second semiconductor chip, and the second and third electrode pads of the first semiconductor chip being exposed; securing a spacer on the upper face of the second semiconductor chip such that the first, second and third electrode pads of the second semiconductor chip are exposed; securing a lower face of the third semiconductor chip on the spacer; securing a lower face of the fourth semiconductor chip on the upper face of the third semiconductor chip, with the first side of the fourth semiconductor chip protruding from the third semiconductor chip, and the second and third electrode pads of the third semiconductor chip being exposed; electrically connecting the third electrode pads of the first and second semiconductor chips to each other, electrically connecting the third electrode pads of the third and fourth semiconductor chips to each other, electrically connecting the first electrode pads of the second and fourth semiconductor chips to the first external terminal, and electrically connecting the second electrode pads of the first and third semiconductor chips to the second external terminal; and entirely sealing the first, second, third and fourth semiconductor chips, the die pad and the spacer with resin and partly sealing the first and second external terminals with the resin.