Patent ID: 8679302

Claim:
A method for making a coated article, the method comprising: sputter-depositing a first medium index layer comprising Ti 1-x Si x O y on a glass substrate, where x is from 0.05 to 0.95 and y is from 0.2 to 2, wherein said medium index layer comprising Ti 1-x Si x O y , is sputter-deposited by a target comprising Si and Ti, wherein the ratio of Si to Ti in the target is from 3:1 to 2:1, forming a high index layer comprising an oxide of titanium over and contacting the medium index layer; and forming a low index layer comprising an oxide of silicon over and contacting the high index layer, wherein the medium index layer has an index of refraction of from 1.6 to 1.9, and a thickness of from about 30 to 70 nm, wherein the high index layer has an index of refraction of from 2.0 to 2.4, and a thickness of from 75 to 125 nm, wherein the high index layer is significantly thicker than the medium index layer, and wherein the low index layer has an index of refraction of from 1.4 to 1.6, and a thickness of from 65 to 115 nm, and wherein the high index layer is thicker than the low index layer.