Patent ID: 9728802
Date: 2017-08-08
CPC Classifications: B29C,B29K,B29L,C25B,H01M,Y02E,Y02P

Claim:
1. A method of preparing a perforated substrate, the method comprising the steps of: (a) providing a layer of material, wherein the layer of material is a solid layer of material, the solid layer of material having a glass transition temperature; and then (b) using a micromold to form at least one perforation extending entirely through the layer of material, the micromold comprising at least one micropillar, the micropillar having a diameter of about 1-150 microns, wherein said micromold using step comprises pressing the at least one micropillar through the solid layer of material and heating the solid layer of material to a temperature above the glass transition temperature of the solid material, whereby a perforated substrate is formed.