FYI - 500 VDC/mil is fairly weak soldermask.
Jeffrey Bush
Director, Quality Assurance and Technical Support
VERMONT CIRCUITS INCORPORATED
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
Voice - 802.257.4571 ext 21
Fax - 802.257.0011
<http://www.vtcircuits.com/>
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Abel, Shannon K.
Sent: Thursday, September 21, 2006 10:44 AM
To: [log in to unmask]
Subject: [TN] Mechanical Hardware Clearance...
I have a board with a 15VDC trace on the surface layer that runs under a
flat washer.
The trace is covered by SM, which provides 500vdc isolation per .001 mil
of SM coating.
2221 states that any electrical conduction trace per sec 6.3 lists a
minimum clearance of .00512 to any other conductive surface (.ie
mechanical hardware)
Do I violate the spec.
Any help would be greatly appreciated.
Shannon Abel
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