METHOD OF MANUFACTURING CORE ASSEMBLY, AND METHOD OF MANUFACTURING COIL

摘要

PROBLEM TO BE SOLVED: To manufacture a core assembly having high dimensional precision, regardless of the type of core material. SOLUTION: A mechanical cutting operation is applied to one surface 71 of a core material substrate 7. By the mechanical cutting operation, projections 74 are formed on the surface 71 of the substrate 7 as spaced by an interval.