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January 2000

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Subject:
From:
Ted Wiktorowicz <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Wed, 12 Jan 2000 07:50:14 -0500
Content-Type:
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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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