| 摘要 |
PROBLEM TO BE SOLVED: To provide a tinned copper alloy sheet for a fitting type terminal which is inexpensive and is less in its friction coefficient. SOLUTION: In the tinned copper alloy sheet, the surface of a tinning layer is stuck with graphite grains with a grain size of≥0.1μm by≥50 pieces per 100μm<SP>2</SP>. In the stuck graphite grains with the grain sizes of≥0.1μm, the number of the grains with the grain size of 0.1 to 1μm is≥80%, and the maximum grain size thereof is≤3μm. Since, in the fitting type terminal produced using the copper alloy sheet, insertion force can be remarkably reduced, it is suitable for small multipolarization. Further, in the copper alloy sheet, the change of contact resistance with the lapse of time is reduced. COPYRIGHT: (C)2011,JPO&INPIT |
