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January 2011

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Subject:
From:
Jason Roetz <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Tue, 11 Jan 2011 15:14:12 -0500
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IMO, I think this is a holdover from the "old days", although I have no studies or evidence handy to back up my opinion. I still think using acute angles is poor design practice, but from a practical standpoint I'm not sure it makes a difference anymore.

My $.02,

Jason Roetz, CID+
Master Designer
Electrical Group, Industrial Controls Division
4201 North 27th Street 
Milwaukee, WI. 53216 
Telephone: 414-449-6397 
Fax: 414-449-7319
[log in to unmask]
http://www.eaton.com/ 
 





-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Cote, Clint (GE Intelligent Platforms, US)
Sent: Tuesday, January 11, 2011 11:53 AM
To: [log in to unmask]
Subject: [TN] Acute Angles

We have a bunch of old references to avoid acute angles when routing
traces. The acute angle would become an acid trap and continue etching
the trace until it reduces it or breaks it completely. Is this still an
issue with modern chemistry and cleaning?  Do acute angles present a
long term reliability issue? Are there any studies or evidence that I
can reference?

Thanks,
Clint Cote

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