Patent ID: 8163572

Claim:
A manufacturing method of a semiconductor device, comprising: forming a semiconductor device in a device region of a semiconductor substrate simultaneously with forming a monitor semiconductor device that includes a gate electrode made of silicon containing material arranged on a gate insulating film in a monitor region of the semiconductor substrate, a source electrode and a drain electrode formed on the semiconductor substrate on corresponding sides of the gate electrode, and a sidewall insulating film formed on a sidewall of the gate electrode; removing at least a part of the sidewall insulating film on the sidewall of the gate electrode on the monitor semiconductor device in the monitor region; removing the gate electrode without removing the gate insulating film by applying pyrolysis hydrogen generated by pyrolysis on the monitor semiconductor device in the monitor region; removing the gate insulating film on the monitor semiconductor device in the monitor region by a wet process; measuring impurities distribution of a silicon active region appeared after the gate electrode is removed; and feeding back a measurement result of the measuring to a semiconductor manufacturing process.