Patent ID: 8007372

Claim:
A golf club head comprising: a shell defining an inner cavity, the shell comprising a crown, a sole, a skirt, and a face, wherein the face comprises: a first portion having a first perimeter, the first perimeter encompassing a center of the face; a separate piece of reinforcing material affixed to a back side of the first portion, the separate piece of reinforcing material configured to distribute stresses to maintain a structural integrity of the face, wherein the first portion and the separate piece of reinforcing material together have a combined first thickness; a second portion having a second perimeter greater than the first perimeter, the second portion in contact with and surrounding the first portion and having a second thickness; wherein the first thickness is greater than the second thickness, and the second thickness is less than or equal to 0.08 inches; and wherein the first portion comprises no corrugations on a front side of the face.