| 摘要 |
PURPOSE:To enhance the production efficiency by making dies unnecessary for producing the shape of an insulation material for a multilayered lead frame and by easily and reliably forming holes for promoting the running of a resin and spot portions for welding power supply pins as predetermined openings. CONSTITUTION:A photosensitive insulation resist 2 is used as etching resist for making parts by etching a metal plate on a metal plate 1 of either radiation plate, power supply plane or grounding plane, and a photosensitive insulation resist 2, on which a resin mold opening 4, an opening 5 for welding point and other were patterned, is used as an insulation layer 2a without being peeled off after the etching. |
