Constructing microstructured bodies e.g. tubes or gratings comprises crushing substrate or powder-containing substrate with pulsed and focused laser beams for generating cavities with melt edges, and applying powder for filling cavities

摘要

The method comprises crushing a substrate or a powder-containing substrate with pulsed and focused laser beams from a laser for generating a row of cavities with melt edges, applying powder for filling the cavities, and further crushing the powder substrate with the pulsed and focused laser beams until microstructured bodies are formed. A constant pulse rate of the laser beam depends on a deflection velocity and phase constant of incident laser pulse for touching or overlapping the cavities. The method comprises crushing a substrate or a powder-containing substrate with pulsed and focused laser beams from a laser for generating a row of cavities with melt edges, applying powder for filling the cavities, and further crushing the powder substrate with the pulsed and focused laser beams until microstructured bodies are formed. A constant pulse rate of the laser beam depends on a deflection velocity and phase constant of incident laser pulse for touching or overlapping the cavities. Focusing and pulse energy focal and pulse length are selected so that the removal of the substrate is carried out to produce the cavity. The laser beam has the pulses energy of 22-30 J/cm 2 and a pulse duration of 200 nano second. A distance of touching or overlapping cavities with melt edges is 77-100% of a foal diameter of the laser beam. The constant pulse rate is measured by a phase shift between the laser pulse rate and the pulse frequency. The powder is applied by a nozzle or a blade so that powder in the cavity is applied continuous powder beam.