METHOD OF MANUFACTURING POROUS ANODIZED ALUMINA FILM

Title:

METHOD OF MANUFACTURING POROUS ANODIZED ALUMINA FILM

Document Type and Number:

WIPO Patent Application WO/1998/009005

Kind Code:

A1

Abstract:

A plurality of recesses having the same spacing and arrangement as those of pores in an alumina film beforehand formed at the time of anodic oxidation are formed on the smooth surfaces of an aluminum plate, and then the aluminum plate is subjected to anodic oxidation to improve the uniformity in roundness and pore diameter in a porous anodized alumina film and regularly arrange the pores at constant intervals. Also, the recesses are formed by pressing a substrate, which is provided at the surfaces thereof with a plurality of projections, against the surface of the aluminum plate prior to anodic oxidation.

Inventors:

NAKAO MASASHI (JP)
TAMAMURA TOSHIAKI (JP)
MASUDA HIDEKI (JP)

Application Number:

PCT/JP1997/002965

Publication Date:

March 05, 1998

Filing Date:

August 26, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)
NAKAO MASASHI (JP)
TAMAMURA TOSHIAKI (JP)
MASUDA HIDEKI (JP)

International Classes:

C25D11/04; C25D11/16; (IPC1-7): C25D11/04; C22C11/16

Foreign References:

JPS62270794A	1987-11-25
JPS61101946A	1986-05-20

Other References: