Patent ID: 8790594
Filing Date: 2014-07-29
Classification: B01L,B81B,B81C,B82Y,D21H

Abstract:
1. A method of processing a substrate to create surface regions of variable adhesive force thereon, comprising: providing a substrate with a surface, the surface having crystalline and amorphous regions in a first ratio of crystalline-to-amorphous regions; processing the surface to form “roll-off” regions having a contact angle of water greater than approximately 150°, and water contact angle hysteresis less than approximately 10°; and processing the surface to form “sticky”regions having a contact angle of water greater than approximately 140°, and water contact angle hysteresis greater than approximately 10°; wherein the processing the surface comprises selective etching of at least a portion of the amorphous regions of the surface and coating at least a portion of the etched surface with a fluorocarbon film; and wherein the processing steps each comprise solvent-free processing.