SURFACE-TREATED Al SHEET SUPERIOR IN SOLDERABILITY, HEAT SINK USING IT, AND METHOD FOR MANUFACTURING SURFACE-TREATED Al SHEET SUPERIOR IN SOLDERABILITY

摘要

PROBLEM TO BE SOLVED: To provide a surface-treated Al sheet superior in solderability, which has a plated layer superior in adhesiveness and wettability to solder, gives the solder superior strength, has high thermal emissivity and high heat conductivity, and can be suitably applied to a heat sink that requires to be soldered and have heat-radiating characteristics; the heat sink using it; and a method for manufacturing the surface-treated Al sheet superior in the solderability. SOLUTION: The surface-treated Al sheet comprises: a Zn layer formed on the surface of an Al substrate by displacement plating; a Ni layer and a Zn layer formed thereon; and a layer for improving thermal conductance further provided on the Zn layer. The heat sink employs the surface-treated Al sheet. COPYRIGHT: (C)2006,JPO&NCIPI