| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a copper or a copper alloy material which does not require plating using Sn, Ni or the like, can suppress the increase of electric resistance at a joint part to the minimum and facilitates laser welding. <P>SOLUTION: The copper material or copper alloy material for laser welding is made by coating at least one surface of a copper plate or a copper alloy plate having a plate thickness of 0.05 to 10.0 mm with a resin layer containing a colorant, wherein reflectivity to light of wavelength 1,000 nm of the resin layer surface is 40% or less. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
