Golf club head with grooves shallower than scorelines and surface film thickness

摘要

A golf club head according to this invention is a wood type golf club head including a face portion, a crown portion, and a sole portion. A plurality of grooves are formed in the face portion. The depth of the plurality of grooves is less than 0.025 mm. A film having a thickness not more than the depth is formed on the face portion by a surface treatment.