Lawrence--
A typical aluminum thickness is 1 um. For high-current contacts, I've gone
up to 3 um.
I'm not sure how thin you can go. No adhesion layers is needed for Al to Si.
    --Kirt Williams

----- Original Message -----
From: "Lung-hao Hu" 
To: 
Sent: Saturday, November 19, 2005 8:59 PM
Subject: [mems-talk] Al wire-bond

> Right now I wanna order silicon wafer for wire-bonding.
> I wonder that how thick is of Al enough to wire-bond and what the
> adhesion layer of Al and its thickness are.