Patent ID: 9643386
Date: 2017-05-09
CPC Classifications: B32B,C23C,G02B,H05K

Claim:
1. A low emissivity film comprising: a first substrate; a first metal oxide layer disposed on the first substrate, the first metal oxide layer comprising a first metal, wherein the first metal contains at least about 90 atomic percent (at %) of one of aluminum (Al), beryllium (Be), magnesium (Mg), and lithium (Li); a first reflective layer disposed on the first metal oxide layer to reflect infrared rays; a second metal oxide layer disposed on the first reflective layer, the second metal oxide layer comprising a second metal, wherein the second metal contains at least about 90 at % of one of aluminum (Al), beryllium (Be), magnesium (Mg), and lithium (Li); and a second substrate disposed on the second metal oxide layer, wherein each of the first metal oxide layer and the second metal oxide layer has a reflective index of about 1.7 or less with respect to light having a first wavelength and light having a second wavelength, the first wavelength is one selected from about 380 nm to about 780 nm, and the second wavelength is one selected from about 380 nm to about 780 nm, which is different from the first wavelength.