Patent ID: 11969787
Assignee: WISCONSIN ALUMNI RESEARCH FOUNDATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  Y | IPC B

Claim 2:
3. The method of claim 1, wherein forming the pores within the layer by applying pulsed energy includes scanning a laser via an upper surface of the layer, by:
forming a first open cavity in the layer by applying a first laser pulse to a first portion of the upper surface, the first open cavity extending from the upper surface to a depth within the layer;
collapsing an upper portion of the first open cavity and therein forming the sealed space at the depth within the layer, by terminating the first laser pulse; and
after the laser is scanned past the first portion of the upper surface, forming a second open cavity in the layer by applying a second laser pulse via a second portion of the upper surface, the second open cavity extending from the upper surface to a depth within the layer, and collapsing an upper portion of the second open cavity and therein forming another sealed space at the depth within the layer, by terminating the first laser pulse.