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Laser‐assisted micron scale particle removal

 

作者: K. Imen,   S. J. Lee,   S. D. Allen,  

 

期刊: Applied Physics Letters  (AIP Available online 1991)
卷期: Volume 58, issue 2  

页码: 203-205

 

ISSN:0003-6951

 

年代: 1991

 

DOI:10.1063/1.104923

 

出版商: AIP

 

数据来源: AIP

 

摘要:

A novel laser‐assisted particle removal (LAPR) technique capable of removing micron scale particles from semiconductor substrates is presented. In our preliminary experiments the contaminated substrates were dosed with water which preferentially adsorbs in the capillary spaces under and around the particles and were subsequently irradiated with transverse, electric, atomspheric CO2laser pulses. At the CO2laser wavelength the beam energy is mainly absorbed in the water and not the substrate. The subsequent explosive evaporation of the adsorbed water molecules produces forces many orders of magnitude larger than the adhesion forces between the particle and the substrate which propel the particles off the substrate surface. LAPR is inherently clean and can easily be incorporated into current or planned wafer processing systems.

 

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