Thermally tempered coated article with transparent conductive oxide (TCO) coating
View Patent ↗A method of making a coated article including a transparent conductive oxide (TCO) film supported by a tempered glass substrate is provided. Initially, an amorphous metal oxide film is sputter-deposited onto a non-tempered glass substrate, either directly or indirectly. The glass substrate with the amorphous film thereon is then thermally tempered using high temperatures. The thermal tempering causes the amorphous film to be transformed into a crystalline transparent conductive oxide (TCO) film. The heat used in the thermal tempering of the glass substrate causes the amorphous film to turn into a crystalline film, causes the visible transmission of the film to increase, and/or causes the film to become electrically conductive.
1. A thermally tempered coated article comprising:
a thermally tempered glass substrate; and
a sputter-deposited thermally tempered crystalline transparent conductive film comprising a metal oxide supported by at least the tempered glass substrate, wherein the transparent conductive film comprises Sn and Sb, and has an Sb content of from about 1 to 15%, and wherein a crystal structure of the crystalline transparent conductive film contains at least one of non-idealities and point defects in said crystal structure.
2. The thermally tempered coated article of claim 1 , wherein the crystalline transparent conductive film has a sheet resistance of no greater than about 100 ohms/square and a visible transmission of at least about 70%.
3. The thermally tempered coated article of claim 1 , wherein the coated article has a visible transmission of at least about 70%.
4. The thermally tempered coated article of claim 1 , wherein the crystalline transparent conductive film has an Sb content of about 8%.
5. The thermally tempered coated article of claim 1 , wherein the crystalline transparent conductive film has an Sn content of from about 30-80%.
6. The thermally tempered coated article of claim 1 , wherein the crystalline transparent conductive film is characterized by SnO x :Sb, where x is from 1 to 1.95.
7. A window comprising the thermally tempered coated article of claim 1 , wherein the window is substantially transparent.