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April 2007

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Subject:
From:
John Foster <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, [log in to unmask]
Date:
Thu, 26 Apr 2007 08:37:01 -0700
Content-Type:
text/plain
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I am a printed circuit board designer and I will tell you that
quite often when I am speaking to a fabricator and I need to take
the vias way down say 8 mils or below the first thing I hear from the 
fabricator is "Is it okay if the vias are plated shut" 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of David Greig
Sent: Thursday, April 26, 2007 8:39 AM
To: [log in to unmask]
Subject: [TN] "plated shut vias"


Hi List,
 
Yet again I've come across fabrication notes on other pcb designers notes that specify that thru board via's may be plated shut.
 
Is there any historical reason for this, or is it just hysterical?
 
I would be rather concerned to see a closed via that is neither blind or filled, mental images of trapped process chemistry etc.
 
Best Regards
 
David Greig
______________________________
 
GigaDyne Ltd
5 Albany Business Centre
Gardeners Street
Dunfermline KY12 0RN
United Kingdom
t: +44 (0)1383 624 975
www.gigadyne.co.uk
______________________________
 

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