Patent ID: 6423146
Filing Date: 2002-07-23
Classification: B08B,H01L,Y10S

Abstract:
A method for cleaning a surface of a semiconductor substrate, comprising:a first cleaning step of supplying ozone water to a cleaning chamber through an ozone water supply line with an injection device such that the ozone water is applied to a surface of a semiconductor substrate set in the cleaning chamber; a step of forming an oxide film on the surface of the semiconductor substrate by soaking the semiconductor substrate in the ozone water for a predetermined time period; and a second cleaning step, after the oxide firm is formed, of supplying ozone water through the ozone water supply line and injecting into the injection device an alkali liquid to mix the ozone water with the alkali liquid in a predetermined ratio, thereby generating a cleaning liquid, and supplying the cleaning liquid to the cleaning chamber such that the cleaning liquid is applied to the surface of the substrate, thereby to clean the surface thereof, wherein the etching of the surface of the semiconductor substrate by the cleaning liquid is weakened by the oxide film.