| 摘要 |
PURPOSE:To make it possible to determine accurately the range of application of an insulating material and to make the insulating material thick sufficiently by forming a flow preventing groove for preventing flow of the insulating material. CONSTITUTION:A flow preventing groove 11 is formed in a lead frame. In a process of applying a varnish-like bonding agent for forming an insulating material 10, therefore, a sphere of application is determined by an edge 11a of the flow preventing groove 11, the possibility that the material flows to a wire-bonding part 2a is eliminated thereby and this can contribute to speedup of a process of application. Since the range of application is limited beforehand by the flow preventing groove 11 to a place necessitating the insulating material, besides, it is easy to make the insulating material 10 thick sufficiently and the reliability of the lead frame can be improved.
|
