The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2008
Filed:
Aug. 26, 2005
Aya Imada, Yokohama, JP;
Tohru Den, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
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.