Patent ID: 8753990
Filing Date: 2014-06-17
Classification: B23K,H01L,Y02E,Y02P,Y10T

Abstract:
1. A method for micro texturing a surface of a material, comprising: providing a gaseous or vacuum environment in an area around the surface of the material; irradiating a portion of the surface with short laser pulses; moving at least one of the surface or a laser beam relative to each other to allow the short laser pulses to irradiate the surface; wherein the method produces a periodic array of micro pillars, semi-periodic array of micro pillars, or a non-periodic array of micro pillars on the surface, resulting in changes in properties of the surface wherein nanospikes are produced atop the micro pillars; wherein said material comprises a semiconductor; wherein the laser pulses have a duration of between about one femtosecond and about 999 picoseconds; and wherein the laser pulses have a wavelength of between about 400 and about 1,600 nm.