John,

   Can you quote the chapter and verse on the IPC Standard for your comment.   What is the least amount of external annular ring copper to have after the hole has been drilled.   I guess to prevent hole break out.

Victor,

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kenneth Wood
Sent: Wednesday, July 15, 2009 9:48 PM
To: [log in to unmask]
Subject: Re: [TN] Via on pad issues

John,
According to the IPC, the pads for an 0201 should be 16.5mils x 18mils
(0.42mm x 0.46mm). 
This is a tad bit small to put a 10mil hole into but you could increase the
size of the pad to 20mils square and put the hole in the center of it.
You will however need to epoxy fill the hole to guard against solder
wicking. Contact your board house for the material they use for this.
Regards
Ken

_____________________________________
Kenneth J. Wood
Saturn PCB Design, Inc.            
www.saturnpcb.com
[log in to unmask]



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brubacher, John (BI09)
Sent: Wednesday, July 15, 2009 5:13 PM
To: [log in to unmask]
Subject: [TN] Via on pad issues

Hello all,

 

Does anybody have experience with using a through hole via at the edge
of the pad on a 0201 component? Can this be assembled reliably or are
there significant issues to overcome?

 

Regards,

John Brubacher, CID

Honeywell Security & 

Data Collection (Video)

 


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