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Title:
ULTRATHIN COPPER FOIL WITH CARRIER, AND COPPER LAMINATED BOARD OR PRINTED WIRING BOARD
Document Type and Number:
WIPO Patent Application WO/2010/027052
Kind Code:
A1
Abstract:
Disclosed is an ultrathin copper foil with carrier that suppresses blistering and stabilizes peeling strength, specifically an ultrathin copper foil with carrier in which the carrier foil and ultrathin copper foil can be easily peeled apart, even when placed in a high-temperature environment. As a means of accomplishing this, the ultrathin copper foil with carrier comprises a carrier foil, a peeling layer, and a copper foil, wherein which the peeling layer is made from a first peeling layer that is disposed on the side of the carrier foil and a second peeling layer disposed on the side of an electrolytic copper foil, there is a first interface between the carrier foil and the first peeling layer, a second interface between the ultrathin copper foil and the second peeling layer, and a third interface between the first peeling layer and the second peeling layer, and the peeling strength at the interfaces is such that first interface > third interface and second interface > third interface.

Inventors:
UNO, Takeo (2-3, Marunouchi 2-chom, Chiyoda-ku Tokyo 22, 〒1008322, JP)
宇野 岳夫 (〒22 東京都千代田区丸の内2丁目2番3号 古河電気工業株式会社内 Tokyo, 〒1008322, JP)
KAWAKAMI, Akira (2-3, Marunouchi 2-chom, Chiyoda-ku Tokyo 22, 〒1008322, JP)
Application Number:
JP2009/065511
Publication Date:
March 11, 2010
Filing Date:
September 04, 2009
Export Citation:
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Assignee:
FURUKAWA ELECTRIC CO., LTD. (2-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 22, 〒1008322, JP)
古河電気工業株式会社 (〒22 東京都千代田区丸の内2丁目2番3号 Tokyo, 〒1008322, JP)
UNO, Takeo (2-3, Marunouchi 2-chom, Chiyoda-ku Tokyo 22, 〒1008322, JP)
宇野 岳夫 (〒22 東京都千代田区丸の内2丁目2番3号 古河電気工業株式会社内 Tokyo, 〒1008322, JP)
International Classes:
C25D7/06; B32B15/01; B32B15/08; C25D1/20; H05K3/00
Domestic Patent References:
2002-03-28
Foreign References:
JP2004169181A2004-06-17
JP2005502496A2005-01-27
JP2007186781A2007-07-26
JP2007186782A2007-07-26
JP2001301087A2001-10-30
JP2002368365A2002-12-20
JP2003011267A2003-01-15
JP2008130867A2008-06-05
JP2007186781A2007-07-26
JP2007186782A2007-07-26
Attorney, Agent or Firm:
SATOH, Takahisa (Sohshin International Patent Office, Toranomon Denki Building 2F 8-1, Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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