Scott,
Sounds like they had resist lifting issues. I have often heard the term
"mouse bites" to describe intrusions. If these are print and etch layers
then the resist failed at the mouse bite. If the entire line is ragged
then they might either be over developed or sometimes the developer rinse
is to hot and the lines "Scallop" or get wavy allowing the etch to look
the same way. Plate up boards can also have the scallop edge or if there
is resist left from incomplete develop then you can have the intrusion or
bite.
Anyway you look at it, sounds like poor control of the developing process
to me.
Chuck Brummer
3M Manufacturing Engineer
8357 Canoga Ave.
Canoga Park, CA 91304-2605
(818) 734-4930
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------