Patent ID: 6670220
Filing Date: 2003-12-30
Classification: H01L,H05K

Abstract:
A semiconductor device fabrication method comprising the steps of:preparing a matrix-type leadframe containing a matrix of unit leadframe patterns, each of which comprises a frame part, a tab located inside said frame part, a plurality of tab suspension leads extending from said frame part to said tab for supporting said tab by tip ends thereof, and a plurality of terminal leads extending from said frame part toward said tab; securing a semiconductor chip on said tab; connecting conductive wires between electrodes of said semiconductor chip and inner end parts of said terminal leads; performing single-sided molding to encapsulate said semiconductor chip, said conductive wires, and said inner end parts of said terminal leads in an insulating resin package part in a fashion that said terminal leads and tab suspension leads are exposed on a mounting face of said package part; and cutting said terminal leads and tab suspension leads; wherein, at the step of said single-sided molding, a contact-preventive part thicker than said package part is formed outside said package part, and at the step of said lead cutting, said contact-preventive part is cut.