Coated article having diamond-like carbon (DLC) and protective film thereon
View Patent ↗There is provided a method of making a heat treated (HT) coated article to be used in shower door applications, window applications, or any other suitable applications where transparent coated articles are desired. For example, certain embodiments of this invention relate to a method of making a coated article including a step of heat treating a glass substrate coated with at least a layer of or including diamond-like carbon (DLC) and an overlying protective film thereon. In certain example embodiments, the protective film may be of or include an oxide of zinc. Following and/or during heat treatment (e.g., thermal tempering, or the like) the protective film may be removed. Other embodiments of this invention relate to the pre-HT coated article, or the post-HT coated article.
1. A coated article comprising:
a glass substrate supporting at least one layer comprising diamond-like carbon (DLC);
a removable protective film comprising zinc oxide on the glass substrate over the layer comprising DLC, wherein the film comprising zinc oxide further includes nitrogen and directly contacts the layer comprising DLC; and
wherein the protective film comprising zinc oxide is oxidation graded so that the protective film is more oxided at a location further from the layer comprising DLC than at a location closer to the layer comprising DLC.
2. The coated article of claim 1 , further comprising a barrier layer comprising silicon oxide and/or silicon nitride on the glass substrate so as to be located between at least the glass substrate and the layer comprising DLC.
3. The coated article of claim 1 , wherein the layer comprising DLC comprises amorphous DLC and has more sp 3 carbon-carbon bonds than sp 2 carbon-carbon bonds.
4. The coated article of claim 1 , wherein the layer comprising DLC has an average hardness of at least 10 GPa.
5. The coated article of claim 1 , wherein the layer comprising DLC has an average hardness of at least 20 GPa.
6. The coated article of claim 1 , wherein the layer comprising DLC is hydrogenated.
7. The coated article of claim 1 , wherein the coated article is substantially transparent.
8. A coated article comprising:
a glass substrate supporting at least one layer comprising diamond-like carbon (DLC);
a removable layer comprising zinc oxide on the glass substrate over the layer comprising DLC, wherein the layer comprising zinc oxide further includes nitrogen and directly contacts the layer comprising DLC; and
an inorganic removable layer on the glass substrate, the inorganic layer located over and directly contacting the layer comprising zinc oxide and the inorganic layer comprises more oxygen than does the layer comprising zinc oxide that is directly contacting the layer comprising DLC.
9. The coated article of claim 8 , further comprising a barrier layer comprising silicon oxide and/or silicon nitride on the glass substrate so as to be located between at least the glass substrate and the layer comprising DLC.
10. The coated article of claim 8 , wherein the layer comprising DLC comprises amorphous DLC and has more sp 3 carbon-carbon bonds than sp 2 carbon-carbon bonds.
11. The coated article of claim 8 , wherein the layer comprising DLC has an average hardness of at least 10 GPa.
12. The coated article of claim 8 , wherein the layer comprising DLC has an average hardness of at least 20 GPa.
13. The coated article of claim 8 , wherein the layer comprising DLC is hydrogenated.
14. The coated article of claim 8 , wherein the coated article is substantially transparent.
15. The coated article of claim 8 , wherein the inorganic layer comprises zinc oxide and contains more oxygen than does the layer comprising zinc oxide that is directly contacting the layer comprising DLC.