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    • 10. 发明授权
    • Ultra-thin copper foil with carrier and copper-clad laminate board or printed circuit board substrate
    • 超薄铜箔带载体和覆铜层压板或印刷电路板基板
    • US08674229B2
    • 2014-03-18
    • US13062335
    • 2009-09-04
    • Takeo UnoAkira KawakamiYuji Suzuki
    • Takeo UnoAkira KawakamiYuji Suzuki
    • H01B1/04
    • C25D1/20B32B15/01B32B15/08B32B15/20C22C9/00C25D1/04C25D3/38C25D5/12C25D5/48H05K3/025H05K2203/0315Y10T428/2495Y10T428/31678
    • The invention has as its object to provide an ultra-thin copper foil with a carrier which suppresses occurrence of blistering and is stable in peeling strength, in particular provides an ultra-thin copper foil with a carrier enabling easy peeling of a carrier foil from an ultra-thin copper foil even under a high temperature environment. As means for that, there is provided an ultra-thin copper foil with a carrier comprised of a carrier foil, a release layer, and a copper foil, wherein the release layer is formed by a first release layer disposed on the carrier foil side and a second release layer disposed on the ultra-thin copper foil side, there is a first interface between the carrier foil and the first release layer, a second interface between the ultra-thin copper foil and the second release layer, and a third interface between the first release layer and the second release layer, and the peeling strengths at the interfaces are first interface>third interface, and second interface>third interface.
    • 本发明的目的是提供一种具有抑制起泡发生并且剥离强度稳定的载体的超薄铜箔,特别是提供具有能够容易地从载体箔剥离的载体的超薄铜箔 超薄铜箔甚至在高温环境下。 作为其手段,提供了具有由载体箔,剥离层和铜箔构成的载体的超薄铜箔,其中剥离层由设置在载体箔侧的第一剥离层形成, 设置在超薄铜箔侧的第二释放层,在载体箔和第一剥离层之间存在第一界面,超薄铜箔和第二剥离层之间的第二界面,以及第三界面 第一释放层和第二释放层,并且界面处的剥离强度是第一界面>第三界面,第二界面>第三界面。