| 摘要 |
PURPOSE:To obtain the lead frame which has necessary various characteristics and its mass production is easy by a method wherein a specified stainless base material is solid phase-welded or plated with copper, etc. and a laminated material is formed, and the material is press-worked or etching-worked to the desired form. CONSTITUTION:The laminated material 8 is formed in such a manner that both sides or one side of the stainless base material 5 is solid phase-welded or plated with copper or copper alloys 6, 7 having excellent pyroductivity, electric conductivity and plating property using SUS410 or SUS430 as the base material 5. The laminated material 8 is press-worked or etching-worked, and the lead frame 9 with the desired shape is prepared. Thus, the lead frame can be obtained whose thermal expansion is little, surface treatment is easy, has corrosion resistance, is excellent in strength at a high temperature, electric conductivity and pyroductivity, its mass production by means of press work is enabled and is cheap. |
