Coated article with ion treated underlayer and corresponding method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B32B-017/06
B32B-009/04
출원번호
US-0453645
(2009-05-18)
등록번호
US-8147972
(2012-04-03)
발명자
/ 주소
Veerasamy, Vijayen S.
출원인 / 주소
Guardian Industries Corp.
대리인 / 주소
Nixon & Vanderhye P.C.
인용정보
피인용 횟수 :
7인용 특허 :
34
초록▼
A coated article is provided that may be used as a vehicle windshield, insulating glass (IG) window unit, or the like. Ion beam treatment is performed on a layer(s) of the coating. For example, a silicon nitride layer of a low-E coating may be ion beam treated. It has been found that ion beam treatm
A coated article is provided that may be used as a vehicle windshield, insulating glass (IG) window unit, or the like. Ion beam treatment is performed on a layer(s) of the coating. For example, a silicon nitride layer of a low-E coating may be ion beam treated. It has been found that ion beam treatment, for example, of a silicon nitride underlayer is advantageous in that sodium migration from the glass substrate toward the IR reflecting layer(s) can be reduced during heat treatment.
대표청구항▼
1. A coated article including a glass substrate which supports a coating thereon, the coating comprising at least the following layers: an ion beam-treated layer comprising silicon nitride supported by the glass substrate;an IR reflecting layer located on and supported by the substrate, the IR refle
1. A coated article including a glass substrate which supports a coating thereon, the coating comprising at least the following layers: an ion beam-treated layer comprising silicon nitride supported by the glass substrate;an IR reflecting layer located on and supported by the substrate, the IR reflecting layer being located over at least the layer comprising silicon nitride; andwherein the ion beam-treated layer comprising silicon nitride comprises nitrogen-doped Si3N4. 2. The coated article of claim 1, wherein the layer comprising nitrogen-doped Si3N4 is doped with at least 2% nitrogen. 3. The coated article of claim 1, wherein the coated article has a visible transmission of at least about 70% and a sheet resistance of less than or equal to about 6 ohms/square. 4. The coated article of claim 1, wherein the layer comprising silicon nitride is located in direct contact with the glass substrate. 5. The coated article of claim 1, further comprising an overcoat layer comprising silicon nitride located on the substrate over at least the IR reflecting layer, wherein the overcoat layer comprising silicon nitride has compressive stress. 6. The coated article of claim 1, wherein the IR reflecting layer comprises silver. 7. The coated article of claim 1, further comprising a layer comprising zinc oxide, wherein the IR reflecting layer is located over and contacts the layer comprising zinc oxide. 8. The coated article of claim 1, wherein the layer comprising silicon nitride has compressive stress and is ion beam treated. 9. The coated article of claim 1, wherein the coating comprises first and second layers comprising silver with at least one dielectric layer provided therebetween. 10. The coated article of claim 1, wherein the coated article is heat treated, has a visible transmission of at least 70% and a sheet resistance (Rs) of no greater than 5.5 ohms/square. 11. The coated article of claim 1, further comprising an oxidation graded layer comprising NiCr contacting the IR reflecting layer. 12. The coated article of claim 1, wherein the layer comprising silicon nitride further includes at least one of aluminum and oxygen. 13. The coated article of claim 1, wherein the coated article is a window. 14. The coated article of claim 1, wherein the layer comprising silicon nitride has an average hardness of at least 20 GPa. 15. The coated article of claim 1, wherein the layer comprising silicon nitride has an average hardness of at least 24 GPa. 16. A coated article including a glass substrate which supports a coating thereon, the coating comprising at least the following layers: a layer comprising nitrogen-doped silicon nitride which has an average hardness of at least 22 GPa, wherein the nitrogen-doped silicon nitride is doped with at least 2% nitrogen;an IR reflecting layer located on the substrate over at least the layer comprising silicon nitride; andwherein the coated article has a visible transmission of at least about 70% and a sheet resistance of less than or equal to about 6 ohms/square. 17. The coated article of claim 16, wherein the layer comprising silicon nitride has an average hardness of at least 24 GPa. 18. The coated article of claim 16, wherein the coated article is thermally tempered. 19. The coated article of claim 16, wherein the layer comprising silicon nitride comprises nitrogen-doped Si3N4. 20. A coated article including a glass substrate which supports a coating thereon, the coating comprising at least the following layers: a layer comprising silicon nitride supported by the glass substrate;an IR reflecting layer located on and supported by the substrate, the IR reflecting layer being located over at least the layer comprising silicon nitride;wherein the layer comprising silicon nitride comprises nitrogen-doped Si3N4, and wherein at least some excess nitrogen present in the layer due to doping is not bonded to silicon. 21. The coated article of claim 1, wherein the ion beam-treated layer is nitrogen ion beam-treated.
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