Patent ID: 7850545

Claim:
A golf club head having a hollow structure, which is made of a metal and has a volume of at least about 400 cubic centimeters, comprising: a hosel part having a shaft insertion hole; a crown part comprising a thin region and a thick region and having an area of about 8000 mm 2 to about 17,000 mm 2 ; a face part, a sole part, and a side part comprising a back side; wherein the thick region of the crown part extends through a distance WA of about 20 millimeters to about 100 millimeters from a center axis line C of the shaft insertion hole toward the highest point T of the crown part and extends through a distance WB of at least about 30 millimeters from the center axis line C toward the back side so that the crown part has a first-order natural frequency of at least about 3000 hertz.