Manufacturing line, process, and sintered article
US-2016375607-A1 · Dec 29, 2016 · US
Window material for ultraviolet-ray-emitting element and method for producing same
US2016096776A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016096776-A1 |
| Application number | US-201514965546-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 10, 2015 |
| Priority date | Jun 12, 2013 |
| Publication date | Apr 7, 2016 |
| Grant date | — |
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Abstract
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A window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less is mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device. The window material for an ultraviolet light emitting device contains a translucent alumina substrate, and a surface of the window material has an average grain diameter of 6 to 60 μm.
First claim
Opening claim text (preview).
What is claimed is: 1 . A window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less, the window material being mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device, wherein the window material contains a translucent alumina, a surface of the window material has an average grain diameter of 6 to 60 μm, the window material has one surface and another surface facing the one surface, and the one surface and the other surface each have a surface roughness of 0.6 μm or less. 2 . The window material according to claim 1 , wherein the window material comprises a substrate, and the substrate has a plate shape with a thickness of 2.0 mm or less, and has the one surface and the other surface. 3 . The window material according to claim 1 , wherein the one surface is a surface from which the ultraviolet light outgoes, and at least the one surface has a surface roughness Ra of 0.03 μm or less. 4 . The window material according to claim 1 , wherein the other surface is a surface into which the ultraviolet light enters, and at least the other surface has a surface roughness Ra of 0.2 μm or more. 5 . The window material according to claim 1 , wherein the one surface and the other surface have different surface roughnesses. 6 . The window material according to claim 5 , wherein the one surface is a surface from which the ultraviolet light outgoes, the other surface is a surface into which the ultraviolet light enters, the one surface has a surface roughness Ra of 0.03 μm or less, and the other surface has a surface roughness Ra of 0.2 μm or more. 7 . A method for producing a window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less, the window material being mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device, wherein the window material contains a translucent alumina, a surface of the window material has an average grain diameter of 6 to 60 μm, the window material has one surface and another surface facing the one surface, and the one surface and the other surface each have a surface roughness of 0.6 μm or less, the method comprising the step of: performing a gel casting process or a tape casting process to prepare a substrate which contains a translucent alumina and has the one surface and the other surface. 8 . The method according to claim 7 , wherein the one surface and the other surface have different surface roughnesses. 9 . The method according to claim 7 , further comprising the step of mirror-polishing at least the one surface to obtain a surface roughness Ra of 0.03 μm or less. 10 . The method according to claim 7 , further comprising the step of increasing at least a surface roughness of the other surface. 11 . The method according to claim 7 , further comprising the steps of: mirror-polishing the one surface to obtain a surface roughness Ra of 0.03 μm or less; and increasing a surface roughness of the other surface.
Assignees
Inventors
Classifications
Aluminium · CPC title
Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics · CPC title
- C04B35/115Primary
Translucent or transparent products · CPC title
Gel casting · CPC title
used in transmission · CPC title
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Frequently asked questions
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- What does patent US2016096776A1 cover?
- A window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less is mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device. The window material for an ultraviolet light emitting device contains a translucent alumina substrate, and a surface of the window material has an average grain diame…
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification C04B35/115. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Apr 07 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).