Dee, the obvious advantages to using the parameters you specify from a
designers point are obvious; packing.  It's amazing how much space opens up
when you drop down from 8&8 to 5&5.  It was said prior to my post, 5&5 is
pretty much routine and you should experience no price increase in board
costs.  But here considering the high volume of boards, the relatively harsh
environment they "live" in, and the need to be nearly defect free, we use
5&5 only when necessary.  We prescribe to the "only as small as needed" rule
and feel that a 12 mil line is going to "shake and bake" better than a 5 mil
line will.


Thomas Hybiske
Bose Corporation
Automotive Systems Division
The Mountain
Framingham, MA 01701-9168




> -----Original Message-----
> From: Dee Stover [mailto:[log in to unmask]]
> Sent: Thursday, September 12, 2002 4:41 PM
> To: [log in to unmask]
> Subject: [DC] fine line traces
>
>
> I have an engineer that is trying to push me into 5/5 or even
> 3/3 spaces
> and traces.  I see that SOME fabricators are doing stuff at
> this level but
> since it isn't all that wide spread.
>
> I am looking for the pros and cons for these type of designs.
>
> Your input is appreciated.
>
>
> Dee Stover  [log in to unmask]
> Associate Technician Design
> National Optical Astronomy Observatory
> 950 N Cherry Ave
> Tucson, AZ 85719
> www.noao.edu
> 520-318-8489
> FAX 520-318-8303
>
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