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November 1999

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"Scott B. Westheimer" <[log in to unmask]>
Date:
Thu, 18 Nov 1999 08:43:37 +0800
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I am looking for the procedure for checking the copper surface after LPI
pre-cleaning. I thought that there was an IPC test method to check for any
residues on the copper surface after cleaning and before LPI. Does anyone
have a test method. Also would be interested in knowing what type of
cleaning procedures people use prior to LPI screening. We have a serious
problem with oxidation after cleaning and before screening LPI.

Thanks

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