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Title:
INSULATING REFLECTIVE SUBSTRATE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2013/005717
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an insulating reflective substrate which is capable of providing a light emitting element that has excellent insulating properties and excellent diffuse reflectance. An insulating reflective substrate (1) of the present invention comprises an aluminum layer (2) and an aluminum oxide layer (3) that is provided on the surface of the aluminum layer (2). The aluminum oxide layer (3) has a thickness from 80 μm to 300 μm (inclusive), and the aluminum oxide layer (3) has large pits (4) each having an opening in the surface of the aluminum oxide layer. The large pits (4) have an average opening diameter of more than 1 μm but 30 μm or less and an average depth of 80 μm or more but less than the thickness of the aluminum oxide layer (3). The average distance between two large pits (4) is 10 μm or more but less than the thickness of the aluminum oxide layer (3). The ratio of the total area of the openings of the large pits (4) to the surface area of the aluminum oxide layer (3) is from 10% to 40% (inclusive). Each large pit (4) has small pits (5) each having an opening in the inner surface of the large pit (4), and the small pits (5) have an average opening diameter of 5-1,000 nm.

Inventors:
HATANAKA YUSUKE (JP)
UESUGI AKIO (JP)
Application Number:
PCT/JP2012/066895
Publication Date:
January 10, 2013
Filing Date:
July 02, 2012
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
HATANAKA YUSUKE (JP)
UESUGI AKIO (JP)
International Classes:
C25D11/16; C25F3/04; H01L33/60
Domestic Patent References:
WO2010150810A12010-12-29
Foreign References:
JPH09304938A1997-11-28
JP2000349320A2000-12-15
JPS5481133A1979-06-28
JPS5747894A1982-03-18
JPS5751289A1982-03-26
JPS5751290A1982-03-26
JPS5754300A1982-03-31
JPS57136596A1982-08-23
JPS58107498A1983-06-27
JPS60200256A1985-10-09
JPS62136596A1987-06-19
JPS63176494A1988-07-20
JPH04176897A1992-06-24
JPH04280997A1992-10-06
JPH06207299A1994-07-26
JPH0524377A1993-02-02
JPH0532083A1993-02-09
JPH05125597A1993-05-21
JPH05195291A1993-08-03
JPS5412853A1979-01-30
JPS4845303A1973-06-28
JPS4826638A1973-04-07
JPS4718739A
JPS5824517B21983-05-21
JP3714507B22005-11-09
JP2002285382A2002-10-03
JP2006124827A2006-05-18
JP2007231339A2007-09-13
JP2007231405A2007-09-13
JP2007231340A2007-09-13
JP2007238988A2007-09-20
JPS5612518B21981-03-23
JPH044194A1992-01-08
JPH05202496A1993-08-10
JPH05179482A1993-07-20
JPH0635174A1994-02-10
Other References:
"Metal Surface Technology Course B", 1969, METAL FINISHING SOCIETY OF JAPAN, article "Anodization", pages: 195 - 207
"New Alumite Theory", 1997, KALLOS PUBLISHING CO., LTD., pages: 95 - 96
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
Mochitoshi Watanabe (JP)
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