Patent ID: 9187319
Filing Date: 2015-11-17
Classification: B81C,H01L

Abstract:
1. A substrate etching method, including: S1: placing a substrate to be processed into a reaction chamber; S2: always supplying etching gas into the reaction chamber; S3: turning on an excitation power supply to generate plasma in the reaction chamber; S4: turning on a bias power supply to apply bias power to the substrate; S5: turning off the bias power supply, and meanwhile, starting to supply deposition gas into the reaction chamber; S6: stopping supply of the deposition gas into the reaction chamber, and meanwhile, turning on the bias power supply; and S7: repeating steps S5-S6, whereby a single etching operation is alternated with a combined operation in which the etching operation and a deposition operation are performed simultaneously until the etching process is completed.