| Affiliation: | 1. Department of Materials Science and Engineering & Department of Energy Systems Research, Ajou University, Suwon, 16499, Republic of Korea;2. School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea;3. SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea;4. National Institutes of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8564, Japan;5. IONES Co., Ltd., Gosam-myeon, Anseong, Gyeonggi, 17505, Republic of Korea |
| Abstract: | Al2O3 thin film was deposited on Gorilla glass using an aerosol deposition method to improve the mechanical property of cover glass for mobile electronic device. The deposited Al2O3 film (approximately 1 μm thick) was a polycrystalline structure and showed a high light transmittance of approximately 90% in the visible light region. The CIE color space (L*a*b) measurement also showed a characteristic corresponding to the acceptable optical range of the cover glass. Further, it was confirmed that the bending strength improved by 10 %, as compared with bare Gorilla glass (from 6970 kgf/cm2 to 7704 kgf/cm2), and the Vickers hardness increased to approximately 1700–2000 HV, as compared with that of Gorilla glass (<700 HV). Owing to the improved mechanical properties, the Al2O3 thin film exhibited good anti-scratch properties and is expected to be applied to the cover glass of various display products. |
