Components of an electronic device and methods for their assembly
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Mold, process for producing mold, and process for producing sheet
US8939752B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939752-B2 |
| Application number | US-30874607-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 28, 2007 |
| Priority date | Jun 30, 2006 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A mold comprising alumina having a microscopic pattern, in which distances between adjacent recesses or salients therein are not longer than wavelength of visible light, formed by anodic oxidation on a surface of an aluminum pre-mold without a rolling mark, wherein height or depth difference at a crystal grain boundary is 300 nm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A large area alumina mold having a microscopic pattern, the mold prepared by a process comprising steps of: preparing a pre-mold by polishing an aluminum plate free from a rolling mark or by forming an aluminum film on a substrate surface; forming a first oxide film by subjecting surface aluminum of the pre-mold to a first anodic oxidation for a time adjusted to provide said first oxide film with a thickness of 10 μm or less; removing the first oxi…
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Classifications
- C25D11/12Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- B29C33/3842Primary
Operations & Transport · mapped topic
Physics · mapped topic
Operations & Transport · mapped topic
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- What does patent US8939752B2 cover?
- A mold comprising alumina having a microscopic pattern, in which distances between adjacent recesses or salients therein are not longer than wavelength of visible light, formed by anodic oxidation on a surface of an aluminum pre-mold without a rolling mark, wherein height or depth difference at a crystal grain boundary is 300 nm or less.
- Who is the assignee on this patent?
- Uozu Yoshihiro, Okamoto Eiko, Kojima Katsuhiro, and 5 more
- What technology area does this patent fall under?
- Primary CPC classification C25D11/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).