In the last years, laser beam drilling became increasingly important for many technical applications as it allows the contactless production of high quality drill holes. So far, mainly short laser pulses are of industrial relevance, as they offer a good compromise between precision and efficiency and combine high ablation efficiency with low thermal damage of the workpiece. Laser beam drilling ...

BACKGROUND Implant bed preparation with laser is taken into consideration owing to the increased interest in use of lasers in hard tissue surgery. The purpose of this study is to determine the deviations in the position and inclination between the planned and prepared implant beds with Erbium, Chromium doped Yttrium Scandium Gallium Garnet (Er,Cr:YSGG) laser using stereolithographic (SLA) surgi...

In this paper, we have the percussive rotational drilling regime that is determined by combination of speed tool, axial force applied on rock optimal values these parameters d epend in particular type tool and physico mechanical properties rocks to be felled. The aim research improve operating regimes rilling machines under conditions Algerian limestone quarries (Hadjar soud quarry) obtain a be...

in this study, laser induced breakdown spectroscopy (libs) is used for qualitative analysis of healthy and carious teeth. the technique of laser ablation is receiving increasing attention for applications in dentistry, specifically for the treatment of teeth such as drilling of micro-holes and plaque removal. in the process of ablation a luminous micro-plasma is normally generated which may be ...

A simple mathematical model of laser drilling is proposed. Assuming axi-symmetry of the process around the axis of the laser beam, a one-dimensional formulation is obtained after cross-sectional averaging. The novelty of the approach relies on the fact that even after dimension reduction, the shape of the hole can still be described. The model is derived, implemented and validated for drilling ...

The market for electronic devices such as cellular phones and microcomputers has been rapidly expanding in recent years due to their enhanced performance, downsizing, and cost reduction. This has been realized by innovation in the precision microfabrication technology of semiconductors and printed wiring circuit boards (PWBs) where laser technologies such as lithography, drilling, trimming, wel...