Ted

We have been switched to TFT about 6 months.
10%-15% Speed increase and consumption decrease.
PRINT&ETCH capability is dependent on chemical and machine characteristics,
with the latter being much harder to control.
We have had no glitches and don't know of any negatives.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ted Wiktorowicz
Sent: Wednesday, January 12, 2000 7:50 AM
To: [log in to unmask]
Subject: [TN]


Because I have not recieved any response, I am trying to re-send an earlier
request in regards to Thiourea free alkaline etchant.

If anyone has had any experience with it I would very much appreciate any
feed back.

- has the claimed benefits (less undercut, higher etching rates,  less
attack on print & etch resists) been realized?

- do you see a lower consumption of TFT etchant in comparison with your old
alkaline etchant - if so can you guesstimate a percentage?

- is the switch over fairly easy?

- are there any negatives to switching?

Thanks in advance for your help


Ted

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