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Micromachining Of Copper By Femtosecond Laser Pulses

Ultra short laser pulses micromachining scaleup and throughput heat accumulation plasma shielding particle shielding 1. The drilling of copper using a dual pulse femtosecond laser with wavelength of 800 nm pulse duration of 120 fs and a variable pulse separation time 01150 ps is investigated theoretically.

Micromachines Free Full Text Direct Writing Of Copper

Understanding Laser Ablation Efficiency

Nano To Pico To Femto Pulse Widths For Optimal Laser

The numerical analysis was performed using a predictive model including a two temperature model an optical critical point model with three lorentzian terms two phase change models for melting and evaporation under superheating and a phase explosion criterion for ejection of metastable.

Micromachining of copper by femtosecond laser pulses. High fabrication speed up to 300 mms more on request fabrication of complex objects with submicron resolution. Abstract simulation results of femtosecond laser ablation of copper were compared to experimental data. In femtosecond laser helical drilling the laser focus moves downward into the workpiece as material is removed which is one of the main features used to improve the processing efficiency. Ied metals with average laser powers above 300 w. Pdf ablation of copper using multipulse femtosecond laser irradiation with an 800 nm wavelength and 120 fs pulse duration is investigated theoretically. To reduce the spatial scale of the numerical model the influence of the helical trajectory was not considered in this study. A two temperature model which includes. Femtosecond laser micromachining workstation femtofab features. Read micromachining of copper by femtosecond laser pulses applied surface science on deepdyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. In the past much research on femtosecond laser micromachining was carried out to understand the complex ablation mechanism whereas recent works are mostly concerned. Many studies had demonstrated the advantages of femtosecond laser pulses over longer laser pulses including a negligible heat affected zone precise ablation threshold high repeatability and efficiency highly precise control of ablation geometry and the ability. Femtosecond laser based micromachining workstation femtofab provides high speed and precision required for many different industrial laser micromachining applications. For simplicity without losing accuracy the problem is approximated to be one. The laser pulse is gaussian in time with a full width at half maximum fwhm t p. Femtosecond laser micromachining has emerged in recent years as a new technique for micronano structure fabrication because of its applicability to virtually all kinds of materials in an easy one step process that is scalable.

Introduction ultra short laser pulses have shown their applicability for high quality laser micro machining of metals semicon. Consider that a free standing copper foil of thickness l and at initial temperature t i is normally irradiated by a femtosecond laser pulse of fluence j o on the front surface x 0. Numerical modeling is the primary method used to study this process. In recent years the use of femtosecond laser pulses for precision micromachining has drawn tremendous interests.