By Dieter Bäuerle
Laser Processing and Chemistry provides an summary of the basics and functions of laser-matter interactions, specifically with reference to laser fabric processing. designated recognition is given to laser-induced actual and chemical techniques at gas-solid, liquid-solid, and solid-solid interfaces. beginning with the history physics, the publication proceeds to envision purposes of laser concepts in micro-machining, and the patterning, coating, and amendment of fabric surfaces. This fourth variation has been revised and enlarged to hide new themes similar to 3D microfabrication, advances in nanotechnology, ultrafast laser know-how and laser chemical processing (LCP).
Graduate scholars, physicists, chemists, engineers, and brands alike will locate this booklet a useful reference paintings on laser processing.
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Additional resources for Chemical Processing with Lasers
E. if d » r o ' The equil ibration time, can be < 10 ns for small s pot si zes and moderate pressures « 1000 mbar). Thi s means that for sma 11 spots even pul sed LCP is often in a steady-state condition. 00 _ _~~---_..... 3. Time dependence of the molecular flux into a microreaction zone of width d. 20Jl 45 most cases, deposition or etching is determined by the steady-state solution of the diffusion equation. e. it becomes nearly proportional to pressure, but independent of d. e. it becomes independent of pressure, but decreases with d.
CO(CF3)2. CF 3I and CDF3' which are also used in LCP. is consistent with this model. Clearly. this model describes the situation in gas mixtures equally well. 31) is fulfilled. The average number of IR photons absorbed by a molecule is
For a few model systems such measurements have in fact been performed for Rand a. In some ca ses , additional estimations can be made. For example, the reflectivity of rough surfaces does not depend upon the depth or the spatial period of the roughness independently, but rather upon their ratio. 47 j. 47J, additional information on the value of R may be obtained. 2 Photolytic Processing In photolytic (photochemical) processing, the laser light breaks chemical bonds directly within the surface of the material itself, within adspecies or within the surrounding gaseous or liquid medium.
Chemical Processing with Lasers by Dieter Bäuerle