| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy lubricant-composite entry sheet which is good in drill hole position accuracy, is hard to break the drill, and further, is excellent in shaving dregs discharge. SOLUTION: The aluminum alloy lubricant-composite entry sheet for printed circuit board drilling has a coated film of lubricant at least on one side of an aluminum alloy board in the entry sheet for the printed circuit board. The content of aluminum of the aluminum alloy board is more than 85.0 mass% and less than 99.0 mass%. The residual is composed of one kind or more than two kinds of the element selected from groups consisting of Si, Cu, Zn, Fe, Mn, Mg, Cr, Ti, and Zr, and the amount of sum totals of Cu and/or Zn is more than the sum totals of Mn and/or Mg. COPYRIGHT: (C)2007,JPO&INPIT |
