| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a composite material for lead frame which allows for provision of a composite material having less variation in thickness and processing at a lower cost. <P>SOLUTION: When manufacturing a composite material 1 composed by sequentially laminating three layers of copper or a copper alloy 2, titanium or a titanium alloy 3, and copper or a copper alloy 2, rolling reduction ratio of bonded clad rolling is set at 60% or higher, a rolling reduction ratio of finish rolling to final board thickness is set at 5% or lower, and cold bonded clad rolling and finish rolling are performed in the atmosphere. <P>COPYRIGHT: (C)2012,JPO&INPIT |
