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A photochemical method for depth profiling multilayered structures of GaAs and AlGaAs is presented. The process combines surface chlorination reactions using molecular chlorine, desorption of surface chlorides, and single step laser ionization time‐of‐flight mass spectroscopy. Pulsed excimer lasers are used for the desorption and ionization steps. The etch rates approached a monolayer per pulse for both substrates. Prospects for improving the resolution of the process in the lateral and vertical dimensions are discussed.
Published in:
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
(Volume:11
,
Issue:
3
)
Date of Publication: May 1993
- Page(s):
- 556 - 561
- ISSN :
- 1071-1023
- Digital Object Identifier :
- 10.1116/1.586800
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- May 1993
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