Patent ID: 7129099

Claim:
A manufacturing method for a semiconductor device, comprising: selecting as a monitoring step, one step from a plurality of steps in a main body wafer manufacturing process for manufacturing a main body wafer on which the semiconductor device is formed; selecting as a variation reduction step, one step from main body post-process steps succeeding the monitoring step, the monitoring step being included in a monitor wafer manufacturing process for manufacturing a monitor wafer on which a monitor element is formed, the monitor wafer manufacturing process including: a monitor pre-process step; the monitoring step; a quality check step of measuring a characteristic of the monitor element formed under the same condition; and a condition setting step of setting a manufacturing condition in the variation reduction step based on a process influence measured in the quality check step; and performing the main body post-process step under the manufacturing condition set in the condition setting step, the monitoring step comprising a thermal diffusion process for a low-concentration impurity region in a source/drain formation step.