METHOD FOR PRODUCING UNIDIRECTIONAL ELECTROMAGNETIC STEEL SHEET

摘要

A resist film is formed on a cold-rolled steel sheet so as to fabricate a groove by etching. At this point, a steel sheet exposed portion where a portion of the steel sheet is exposed is formed in the resist film, and the steel sheet exposed portion has a first region oriented in a sheet width direction, and a plurality of second regions starting from the first region, widths of the first region and the second regions being 20 µm to 100 µm, and a distance from an end portion of one of the second regions to an end portion of another of the second regions adjacent thereto being 60 µm to 570 µm.