| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treated Al sheet having excellent solderability such as solder wettability and solder strength, further having high thermal conductivity and thermal radiability, capable of soldering, suitably applicable to use such as a heat sink requiring thermal radiability, and also having excellent appearance. SOLUTION: A Zn layer is formed on the surface of an Al substrate by substitution plating, an Ni-Zn layer containing Zn in a range where its appearance after plating is not damaged or the Ni-Zn layer and an Sn layer are formed thereon by plating, and further, a layer improving its solderability or a layer having solder flux properties and improving its thermal radiability is selectively formed to obtain the surface treated Al sheet. COPYRIGHT: (C)2007,JPO&INPIT
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