| 摘要 |
PROBLEM TO BE SOLVED: To provide an entry sheet for drilling that reduces a decrease in hole position precision and winding of a drill bit with entry sheet resin which may cause breaking of a drill, and has superior hole position precision. SOLUTION: The entry sheet for drilling has an organic composition layer containing water-soluble resin (a) formed on at least one surface of metal foil, and also has a hardened material layer of light-hardening resin formed on the surface of the resin composition layer. COPYRIGHT: (C)2008,JPO&INPIT |
