It adsorbs species (e. g., O2) from the air which in turn increases the
surface tension of water on it. The fresh layer of pure Cr will induce
aggressive wetting.

-Jim Intrater

----- Original Message -----
From: "Mister Einstein" 
To: 
Sent: Wednesday, January 14, 2004 2:12 PM
Subject: [mems-talk] Aging of sputtered chrome


> Does anyone know why a surface sputtered with chrome
> would become more hydrophobic over time?  I can
> accelerated the process by baking at 85C for a minimum
> of 12 hours and I can reverse the process using 1N HCl
> or NaOH.  Any explanations are appreciated
>
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