Patent ID: 6503578
Filing Date: 2003-01-07
Classification: C23C

Abstract:
A method for preparing ZnSe thin films by ion-assisted continuous wave CO2 laser deposition for blue light emitting devices, comprising the steps of:providing process conditions of 1Ã—10âˆ’3 to 1Ã—10âˆ’6 torr for a deposition pressure, 25 to 400Â° C. for a deposition temperature, 3.6 to 20.2 Ã¥/sec for a growth rate, 6 to 70 watt for a CO2 laser power, 10 to 20 mA of ion beam current for the assisted deposition, and 100 to 350 V for an ion beam voltage; using a CO2 laser to cause evaporation in the assisted deposition with an ion beam directed at deposition surfaces for growing said ZnSe thin films on substrates to manufacture optical multilayer films and anti-reflection coatings for said blue light emitting devices; using a solution of aqua ammonia, hydrogen peroxide, and water at a ratio of 3:1:15, then a bombardment of argon of ion beam (100 to 350 V, 10 to 25 mA) for 1 to 20 minutes to clear away oxides on said substrates surfaces before said growing.