Will something like plain ol' acetic acid [vinegar], or a mild lye [NaOH]
also work?

I remember lecturing operators on how even spittle will take the [Al] bond
pads off an IC.  I know it is not the same aluminum, but HF is certainly
nasty stuff and would heed Joyce's cautions


Steve Creswick
Sr Associate - Balanced Enterprise Solutions
http://www.linkedin.com/in/stevencreswick
                         616 834 1883



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Thursday, September 06, 2012 4:55 PM
To: [log in to unmask]
Subject: Re: [TN] Aluminum Etch

Electrochemical polishing plus HF etching.  Not nice. My 2 cents (wear
double gloves.  I got nasty burn before... thanks god I got live to tell the
story --- when I was young and stupid). 

Joyce Koo
Materials Researcher - Materials Interconnect Lab Research In Motion Limited
Office: (519) 888-7465 79945
Mobile: (226) 220-4760

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Victor Hernandez
Sent: Thursday, September 06, 2012 4:21 PM
To: [log in to unmask]
Subject: [TN] Aluminum Etch

Fellow TechNetters:

   Any suggestion on an etchant for  aluminum,  Al 5052 H32 , for grain
structure delineation after cross section and final polish?

Victor

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