Title:
ENTRY SHEET FOR PRINTED CIRCUIT BOARD HOLE BORING, WATER-SOLUBLE LUBRICATING RESIN COMPOSITION USED WITH SAME AND PRODUCTION METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2011/025144
Kind Code:
A2
Abstract:
The present invention relates to an entry sheet for printed circuit board hole boring, comprising: a metal thin film substrate; and a water-soluble lubricating resin layer formed on the substrate, wherein the water-soluble lubricating resin layer comprises 100 parts by weight of a water-soluble polyester resin, from 0.5 to 3 parts by weight of a vinyl chloride - vinyl acetate copolymer and from 0.5 to 3 parts by weight of a hydrogenated hydrocarbon resin. In entry sheets produced in this way, the uniformity and accuracy of the bored holes is outstanding, the force of binding onto the metal thin film is exceptional, and there is no peeling or crack generation on the surface even at low temperature.
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Inventors:
HONG CHANG-IL (KR)
JEON JIN-SOO (KR)
MOK JIN-KYU (KR)
KWON YONG-DAE (KR)
JEON JIN-SOO (KR)
MOK JIN-KYU (KR)
KWON YONG-DAE (KR)
Application Number:
PCT/KR2010/004487
Publication Date:
March 03, 2011
Filing Date:
July 09, 2010
Export Citation:
Assignee:
SANG A FLONTEC CO LTD (KR)
HONG CHANG-IL (KR)
JEON JIN-SOO (KR)
MOK JIN-KYU (KR)
KWON YONG-DAE (KR)
HONG CHANG-IL (KR)
JEON JIN-SOO (KR)
MOK JIN-KYU (KR)
KWON YONG-DAE (KR)
International Classes:
B23B41/00; B23B35/00; B32B15/09; C09D5/00; C09D131/04; C09D133/04; H05K3/00
Foreign References:
| JP2007222994A | 2007-09-06 | |||
| KR20080042848A | 2008-05-15 | |||
| KR100672775B1 | 2007-01-22 | |||
| JP2008222762A | 2008-09-25 | |||
| JP2009172752A | 2009-08-06 | |||
| KR20070088676A | 2007-08-29 |
Attorney, Agent or Firm:
J.C.HYUN PATENT & LAW FIRM (353-18Shindang 2-dong, Jung-gu, Seoul 100-828, KR)
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