Patent ID: 7493676

Claim:
A fastener structure, comprising: a plurality of hook layers, each hook layer: extending in a generally longitudinal direction in the structure; including a plurality of hooks, each hook extending from a hook layer base; wherein the hook layer bases are separated from each other by valleys; a plurality of retention layers, each retention layer: extending in a generally longitudinal direction in the structure; including a plurality of fingers, each finger extending from a retention layer base; including a plurality of retention layer bases from which no finger extends; wherein the retention layer bases are separated from each other by valleys; a plurality of spacer layers, each spacer layer: including a plurality of spacer layer bases; wherein the spacer layer bases are separated from each other by valleys; wherein: each hook layer base, retention layer base and spacer layer base includes a top surface; the top surfaces of at least some of the hook layer bases, retention layer bases, and spacer layer bases together form an essentially horizontal surface; and the hook layers, retention layers and spacer layers are arranged to provide a plurality of hook rows extending in a generally lateral direction across the fastener structure, some of which hook rows include fingers.