Patent ID: 9598768
Date: 2017-03-21
CPC Classifications: C23C,H01L

Claim:
1. A method, comprising: (A) converting a solution comprising zinc or zinc and magnesium into a mist by applying ultrasonic waves to said solution, said solution present in a solution container; (B) heating a substrate to a temperature sufficient to form a zinc oxide film or a zinc-magnesium oxide film by heating said substrate with a heating device in contact with said substrate to the sufficient temperature, thereby obtaining a heated substrate present in a reaction vessel; and (C) supplying the mist from (A) through a path that connects the solution container to the reaction vessel, thereby applying the mist to a first main surface of the heated substrate from (B) and supplying ozone to the reaction vessel, thereby applying the ozone to a first main surface of the heated substrate from (B), thereby forming a zinc oxide or magnesium zinc oxide film on the first main surface of the heated substrate, said film having a thickness of from 350 to 680 nm and a transmittance of at least 90% for wavelengths of from 350 nm to 1,500 nm, wherein said mist comprising zinc or zinc and magnesium and said ozone are introduced sequentially and separately into the reaction chamber, and said zinc oxide film is a ZnO film and said magnesium zinc oxide film is a ZnMgO film.