Patent ID: 8277574

Claim:
A method for manufacturing a grain-oriented electromagnetic steel sheet whose magnetic domains are controlled by laser beam irradiation, comprising the step of: repeatedly irradiating a surface of a grain-oriented electromagnetic steel sheet with a condensed continuous-wave laser beam by scanning the grain-oriented electromagnetic steel sheet from a rolling direction toward an inclination direction thereof while scanning portions of the continuous-wave laser beam are being shifted at intervals, wherein when an average irradiation energy density Ua is defined as Ua=P/Vc/PL (mJ/mm 2 ), where P (W) is average power of the continuous-wave laser beam, Vc (mm/s) is a velocity of the scanning, and PL (mm) is each of the intervals, the following relationships are satisfied: 1.0 mm≦PL≦3.0 mm 0.8 mJ/mm 2 ≦Ua≦ 2.0 mJ/mm 2 .