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  1. gettering

    Measurement of capacitance

    Hi, When capacitance is measured, forward and reverse bias is applied alternatively. Could you tell me why this is requried for the measurement? In my opinion, charge stored in capacitance would not be released even though dc voltage is applied. and could you tell me how capacitance meter works...
  2. gettering

    How to prepare HCl gas from HCl acid

    Thank you so much for your information. I found the gas supplier deal with hydrogen chloride gas. Thank you.
  3. gettering

    How to prepare HCl gas from HCl acid

    Hi, I heard that HCl gas could be effective for cleaning the quartz tube in the high temp. furnace. But, seems there is no commercially available HCl gas. So, we are planning to prepare HCl gas using HCl acid we have in our lab. Could you tell me how to prepare HCl gas using HCl acid? I'm not...
  4. gettering

    chemical solution to remove Cr or Cr2O3 on silicon wafer surface

    Hi, I'm looking for chemical solution to remove Cr or Cr2O3 on silicon wafer selectively. I just tried using HF to remove it, but it didn't work well. Could you recommend me some chemical solution? Thank you. YK
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