| abstract |
A method is provided for stripping a photoresist with a carbonized crust formed during a high dose ion implant. The method may be performed in any etch tool or asher including those where a plasma is generated with a RF discharge source and bias power and tools with a microwave downstream plasma flow. An ICP plasma source is preferred for generating plasma from a flow of oxygen and one or more C x H y F z gases such as CH 3 F and CH 2 F 2 where x, y and z are ≧1. A high photoresist removal rate of from 0.2 to 2 microns per minute is achieved while reducing thickness loss in exposed oxide, polysilicon, and silicon layers compared with conventional methods that employ O 2 and C M F N gases. For NMOS and PMOS transistors, Idsat and contact junction leakage are improved. |