Method for producing porous body
US7432218B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2005 |
| Grant date | Oct 7, 2008 |
| Priority date | — |
| Expiry date | Apr 4, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S438/96
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A process of a porous body comprises the steps of disposing a first material in which pores are formed by anodization on a substrate to form a first layer, disposing on the first layer a second material which has a hardness lower than that of the first material and an oxide of which is dissolved by an anodization step to form a second layer, forming a concave structure on a surface of the second layer, oxidizing the second layer, and subjecting the first layer to anodization to dissolve the second layer.A magnetic recording medium or a light-emitting element comprises a first layer which is comprised of an oxide of aluminum and comprises a porous portion on a substrate, and a second layer on the first layer which has a hardness lower than that of the first layer and is comprised of a metal element, wherein the pores are packed with a magnetic substance or a light-emitting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.