Title:
ENTRY SHEET FOR DRILLING
Document Type and Number:
WIPO Patent Application WO/2009/151107
Kind Code:
A1
Abstract:
Disclosed is an entry sheet for drilling characterized by the facts that the hole position accuracy is excellent and the drill damage rate is low since little resin is attached to the drill. More specifically, disclosed is an entry sheet for drilling made of a copper clad laminate formed by laminating and integrating a water soluble resin composition (B), which contains 0.1-5 parts by weight of one or several water soluble substances selected from the group of polyhydric alcohols, amino acid derivative alcohols, organic acids, and organic acid salts with respect to 100 parts by weight of a water soluble resin mixture (A), in the water soluble resin mixture (A) composed of 80-98 parts by weight of polyethylene glycol having a number average molecular weight in the range of 15,000-35,000 and 2-20 parts by weight of polyethylene oxide having a number average molecular weight in the range of 50,000-200,000, on at least one side of a metal foil having a thickness of 0.05-0.5 mm.
Inventors:
MATSUYAMA YOUSUKE (JP)
KOMATSU SHINYA (JP)
AOTO HIROKI (JP)
SUGIMOTO NORIAKI (JP)
KOMATSU SHINYA (JP)
AOTO HIROKI (JP)
SUGIMOTO NORIAKI (JP)
Application Number:
PCT/JP2009/060722
Publication Date:
December 17, 2009
Filing Date:
June 05, 2009
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
MATSUYAMA YOUSUKE (JP)
KOMATSU SHINYA (JP)
AOTO HIROKI (JP)
SUGIMOTO NORIAKI (JP)
MATSUYAMA YOUSUKE (JP)
KOMATSU SHINYA (JP)
AOTO HIROKI (JP)
SUGIMOTO NORIAKI (JP)
International Classes:
B26F1/16; H05K3/00
Foreign References:
| JP2007222994A | 2007-09-06 | |||
| JP2008098438A | 2008-04-24 |
Attorney, Agent or Firm:
KOBAYASHI, Masaharu (2nd Floor33-2, Takadanobaba 1-chome,Shinjuku-ku, Tokyo, JP)
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