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    • 71. 发明授权
    • Mold manufacturing method and electrode structure for use therein
    • 模具制造方法和用于其中的电极结构
    • US08641884B2
    • 2014-02-04
    • US13254556
    • 2010-03-02
    • Hidekazu HayashiTokio TaguchiKazuhiko Tsuda
    • Hidekazu HayashiTokio TaguchiKazuhiko Tsuda
    • C25D11/12C25D11/24C25D17/12G02B1/11
    • G02B1/118B29C33/424B29K2905/02C25D11/12C25D11/18C25D11/24
    • A method of fabricating a motheye mold according to the present invention includes the steps of: (a) anodizing a surface of an aluminum film (10a) via an electrode (32a) that is in contact with the surface, thereby forming a porous alumina layer which has a plurality of very small recessed portions; (b) after step (a), allowing the porous alumina layer to be in contact with an etchant, thereby enlarging the very small recessed portions of the porous alumina layer; and (c) after step (b), further anodizing the surface to grow the plurality of very small recessed portions. The aluminum film is made of aluminum with a purity of 99.99 mass % or higher. The electrode includes a first electrode portion (32a1) which is made of aluminum with a purity of 99.50 mass % or lower and a second electrode portion (32a2) which is made of aluminum with a higher purity than the aluminum of the first electrode portion and which is interposed between the surface and the first electrode portion. Step (a) and step (c) are performed with the second electrode portion being in contact with the surface in an electrolytic solution. According to the present invention, a method of efficiently anodizing an aluminum film formed over a large surface substrate and an electrode structure for use in the method.
    • 根据本发明的制造动植物模具的方法包括以下步骤:(a)通过与表面接触的电极(32a)阳极氧化铝膜(10a)的表面,从而形成多孔氧化铝层 其具有多个非常小的凹部; (b)在步骤(a)之后,使多孔氧化铝层与蚀刻剂接触,从而扩大多孔氧化铝层的非常小的凹部; 和(c)在步骤(b)之后,进一步对表面进行阳极氧化以使多个非常小的凹进部分生长。 铝膜由纯度为99.99质量%以上的铝制成。 电极包括纯度为99.50质量%以下的铝制的第一电极部分(32a1)和纯度高于第一电极部分的铝的纯铝的第二电极部分(32a2),以及 其介于表面和第一电极部分之间。 步骤(a)和步骤(c)在第二电极部分与电解液中的表面接触的情况下进行。 根据本发明,有效地阳极氧化形成在大表面基板上的铝膜和用于该方法的电极结构的方法。