Patent ID: 7824996

Claim:
A semiconductor device fabrication method of forming desired patterns over a specified area and non-specified area, comprising: forming a first resist film over a material film formed over a work substrate; transferring a first mask pattern, including a circuit pattern for the non-specified area and a protection pattern for the specified area, to the first resist film using a first exposure mask; forming a first resist pattern by developing the first resist film to which the first mask pattern has been transferred; forming a first material film pattern by etching the material film using the first resist pattern as a mask; removing the first resist pattern; forming a second resist film over the work substrate over which the first material film pattern has been formed; transferring a second mask pattern, including a circuit pattern for the specified area and a protection pattern for the non-specified area, to the second resist film using a second exposure mask; forming a second resist pattern by developing the second resist film to which the second mask pattern has been transferred; slimming the second resist pattern; forming a second material film pattern by etching the material film using the slimmed second resist pattern as a mask; and removing the slimmed second resist pattern.