Ceramic composite for light conversion and method for manufacture thereof

Patent metadata

Field	Value
Publication number	US-9543480-B2
Application number	US-201113992805-A
Country	US
Kind code	B2
Filing date	Dec 2, 2011
Priority date	Dec 10, 2010
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

A ceramic composite for light conversion comprising a solidified body in which crystalline phases of oxides are three-dimensionally entangled and a method for manufacture thereof. A manufacture method of a ceramic composite for light conversion is characterized in that a polishing step is provided in a chemical mechanical polishing (CMP) process applied to the surface of a solidified body with a structure in which an Al 2 O 3 phase and other phases are three-dimensionally entangled.

First claim

The invention claimed is:

1. A method of manufacturing a ceramic composite for light conversion, comprising:
applying a CMP process to a surface of a solidified body with a structure in which an Al 2 O 3 phase and a fluorescent emitting crystalline phase of oxides having a hardness smaller than that of Al 2 O 3 and an alkali resistance higher than that of Al 2 O 3 that are continuously and three-dimensionally entangled with each other, wherein
the crystalline phase of oxides is a fluorescence emitting phosphor which is a (Y, Ce) 3 Al 5 O 12 (YAG) phase, and
pH of a polishing liquid is adjusted between 11 and 12 when performing a CMP process.

2. The method of manufacturing a ceramic composite for light conversion according to claim 1 , wherein pH of the polishing liquid is adjusted between 11.3 and 11.6.

3. The method of manufacturing a ceramic composite for light conversion according to claim 2 , wherein the polishing liquid contains silica particles and the content thereof is below from 0.1 to 5% by mass.

4. The method of manufacturing a ceramic composite for light conversion according to claim 2 , wherein a pressing load per unit area in the CMP process is from 10 to 50 kPa.

5. The method of manufacturing a ceramic composite for light conversion according to claim 1 , wherein the polishing liquid contains silica particles and the content thereof is below from 0.1 to 5% by mass.

6. The method of manufacturing a ceramic composite for light conversion according to claim 5 , wherein a pressing load per unit area in the CMP process is from 10 to 50 kPa.

7. The method of manufacturing a ceramic composite for light conversion according to claim 1 , wherein a pressing load per unit area in the CMP process is from 10 to 50 kPa.

8. The method of manufacturing a ceramic composite for light conversion according to claim 1 , wherein the step level difference between the Al 2 O 3 phase and the crystalline phase of oxides on the surface of the solidified body is equal to 0.010 μm or less.

9. The method of manufacturing a ceramic composite for light conversion according to claim 8 ,
wherein the polishing liquid contains silica particles and the content thereof is below from 0.1 to 5% by mass.

10. The method of manufacturing a ceramic composite for light conversion according to claim 9 , wherein a pressing load per unit area in the CMP process is from 10 to 50 kPa.

11. The method of manufacturing a ceramic composite for light conversion according to claim 9 , wherein a pressing load per unit area in the CMP process is from 10 to 50 kPa.

12. A ceramic composite for light conversion comprising a solidified body with a structure in which an Al 2 O 3 phase and a fluorescent emitting crystalline phase of oxides which is a (Y, Ce) 3 Al 5 O 12 (YAG) phase having a hardness smaller than that of Al 2 O 3 and an alkali resistance higher than that of Al 2 O 3 that are continuously and three-dimensionally entangled with each other and a step level difference between the Al 2 O 3 phase and the fluorescent emitting crystalline phase on a surface of the solidified body is equal to 0.010 μm or less.

Assignees

• Inamori Dai
• Kawano Takafumi
• Doi Toshiro
• Kurokawa Syuhei
• Ube Industries

Inventors

• Inamori Dai
• Kawano Takafumi
• Doi Toshiro
• Kurokawa Syuhei

Classifications

• B24B37/044

  characterised by the composition of the lapping agent · CPC title

• B24B37/00

  Lapping machines or devices; Accessories (B24B3/00 takes precedence) · CPC title

• C04B35/44

  based on aluminates · CPC title

• C09G1/02

  containing abrasives or grinding agents {(abrasives as such C09K3/14; polishing of semi-conductors H10P52/40)} · CPC title

• C04B2235/3225

  Yttrium oxide or oxide-forming salts thereof · CPC title