Patent ID: 7186663

Claim:
A method for forming a semiconductor thin film, the method comprising: providing a substrate; supplying an atmosphere with a hydrogen partial pressure; performing a high-density (HD) plasma enhanced chemical vapor deposition (PECVD) process, connecting a top electrode to an inductively coupled HD plasma source, as follows: locating the substrate between a bottom electrode and the top electrode; supplying a power density in the range of 0 to 10 W/cm 2 , at a frequency in the range of 13.56 to 300 MHz, to the top electrode; and, supplying a power density in the range of 0 to 3 W/cm 2 , at a frequency in the range of 50 KHz to 13.56 MHz, to the bottom electrode; maintaining a substrate temperature of 400 degrees C., or less; and, forming a hydrogenated semiconductor layer overlying the substrate selected from the group including silicon (Si) and Si-germanium.