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| Reply To: | TechNet Mail Forum. |
| Date: | Thu, 20 Nov 1997 16:12:26 -0500 |
| Content-Type: | text/plain |
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If you'll pardon my ascii art, mouse bites are small areas of line width reduction.
On innerlayers they are caused by a variety of factors. If you use dry film to image
cores and the resist does not conform perfectly to a scratch or other imperfection in the
surface then the etchant will start to etch under the resist into the edge of the line a bit.
Another cause is if the etch pH is a bit too high (alkaline etch) the resist may begin to lift
along the edges and allow some etchant seepage under the edge.
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From: sam mccorkel[SMTP:[log in to unmask]]
Sent: Thursday, November 20, 1997 12:23 PM
To: [log in to unmask]
Subject: [TN] Mouse Bites
Our QC would like to know ..............
What do mouse bites look like?
Where do they come from?
How do you prevent them?
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