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GaAs/AlGaAs etching

  1. Dec 6, 2004 #1


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    I'm looking for reliable (anisotropic) wet etch techniques that give high (~ 10^2) and low aspect ratios for GaAs on Al(0.3)Ga(0.7)As. I have a few in hand, but would be glad for any additional inputs, especially from someone with personal experience, or at least word-of-mouth knowledge.

    I'm aware of the citric acid/peroxide (which we use) and the ammonia/proxide wet etches. I'm checking to make sure there's not some other wet etch that has been found to be far superior. Any opinions on HCl/H2O2 or others ?
    Last edited: Dec 6, 2004
  2. jcsd
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