Patent ID: 9059101
Filing Date: 2015-06-16
Classification: H01J,H01L,H05B

Abstract:
1. A method for processing a substrate in a semiconductor processing chamber, the method comprising: identifying a first recipe having a plurality of steps that include an operating frequency equal to a nominal frequency for a radiofrequency (RF) power supply, the first recipe being used to etch one or more layers of material disposed over a substrate; analyzing each step with the operating frequency equal to the nominal frequency, the analyzing determining if any step produces instability at the nominal frequency; adjusting the operating frequency for one or more of the steps when the instability in the one or more steps exceeds a threshold, the adjusting acting to find an approximate minimum level of instability; and constructing a second recipe after the adjusting such that at least one of the steps includes a respective operating frequency different from the nominal frequency, the second recipe being used to etch the one or more layers disposed over the substrate in the semiconductor processing chamber.