Patent ID: 7413930
Filing Date: 2008-08-19
Classification: H01L

Abstract:
1. A manufacturing method of a lead frame having a plurality of inner leads, a plurality of outer leads formed in one with this, and a sheet member joined to a tip part of each inner lead, comprising the steps of: (a) preparing a frame body in which tip parts of the inner leads are mutually formed in one by a first connection part; (b) preparing the sheet member which is formed in a shape corresponding to a plurality of inner lead rows, and includes a metal plate, an insulating first adhesive layer arranged at a surface side, and an insulating second adhesive layer harder than this first adhesive layer; (c) sticking a tip part of each of the inner leads and the first connection part, and the sheet member; and (d) after the step (c), removing the first connection part from the frame body by punching and cutting the first connection part using a punch along tip parts of the inner leads; wherein in the step (c), the inner lead and the sheet member are stuck making a surface at a side of burr formation of the inner lead contact to at least the first adhesive layer of the sheet member.