Patent ID: 8916425

Claim:
A method for forming a microcrystalline semiconductor film, comprising: forming a seed crystal over an insulating film by a plasma CVD method under a first condition so that the seed crystal is in contact with the insulating film where a flow rate of hydrogen is greater than or equal to 50 times and less than or equal to 1000 times a flow rate of a deposition gas containing silicon, and a pressure in a process chamber is greater than 1333 Pa and less than or equal to 13332 Pa; and forming a microcrystalline semiconductor film over the seed crystal by a plasma CVD method under a second condition where a flow rate of hydrogen is greater than or equal to 100 times and less than or equal to 2000 times a flow rate of a deposition gas containing silicon, and a pressure in the process chamber is greater than or equal to 1333 Pa and less than or equal to 13332 Pa, wherein the deposition gas containing silicon comprises a gas selected from the group consisting of SiH 4 and Si 2 H 6 .