Hi Jonathan:

This is from MSDS of Phibro Tech's High Speed Ac-cu-Guard:

NH4Cl       19 - 27 %
NH4OH       14 - 23 %
NH5CO3       1 -  5 %

Sp. gr.:        1.015 - 1.045
Vapor pressure  96 mmHg
pH      9.4 - 10.4

Hope this'll help.

Yu-Shan Han

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Meigs, Jonathan
Sent: Wednesday, May 26, 1999 6:47 AM
To: [log in to unmask]
Subject: [TN] Ammoniacal Etchant Recipe


Good Morning, Everyone!

I am in need of a quick and dirty recipe for an ammoniacal etchant for use
in one of my lab experiments. I'm not trying to make 2 mil lines and spaces,
but it needs to be ammoniacal.

Can anyone help me with a recipe?

Thanks in advance,


Jonathan Meigs
Product Development Engineer

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