www.delorie.com/archives/browse.cgi   search  
Mail Archives: geda-user/2014/02/27/23:34:37

X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20120113;
h=mime-version:in-reply-to:references:date:message-id:subject:from:to
:content-type;
bh=BdYato1H8g3Pqjq7nYZoAlLT9o3LRKThkv3OQIEzfQc=;
b=O+ekV9G0bc72fTy9HjZIVSPM2BCkT8CokoKvgbSW0VfIo+CuFi7l2xnoqeXIyArgZK
t1GRyfxnxR/jA5Mm98sKt/2gs0XJ/cYRTFPKmDtf/xB3Xghb9wxVv1RsWUKD4VN7kcHN
9BIAAJNnnFz367rnWxpeqjAz7IlQgT8L4SDVPta4w1a5m3d15Vtp5HU2IkvDRySp0ikn
rA4/faCoE/WNMStWn3UU8lZN3QKqfoG68Cx9A/HcL25vhNYHYoCZQHsbendwxoPrfZUN
OGOp1ARfQzKw+DE5qFy/nkhslJd0581oe5R5GAiyk4vWI2pEHo+w2dUOvJJRMwvg6EN0
Hvag==
MIME-Version: 1.0
X-Received: by 10.224.60.134 with SMTP id p6mr869772qah.98.1393562027526; Thu,
27 Feb 2014 20:33:47 -0800 (PST)
In-Reply-To: <alpine.BSF.2.00.1402271512001.24988@earl-grey.cloud9.net>
References: <CALSZ9gohqcqTT7y8x8x2wZdrcv8s2M-DhaN8vB5Zf6uvpRrCYA AT mail DOT gmail DOT com>
<alpine DOT BSF DOT 2 DOT 00 DOT 1402271512001 DOT 24988 AT earl-grey DOT cloud9 DOT net>
Date: Fri, 28 Feb 2014 11:33:47 +0700
Message-ID: <CAHdUXzKqjXVUCwzWS7yygrokWU=K7pZBL5_yEUvrv2jgL1A3FQ@mail.gmail.com>
Subject: Re: [geda-user] Via under a pad?
From: Eugene Mikhantiev <mikhantiev AT gmail DOT com>
To: geda-user AT delorie DOT com
Reply-To: geda-user AT delorie DOT com
Errors-To: nobody AT delorie DOT com
X-Mailing-List: geda-user AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com

2014-02-28 3:15 GMT+07:00 Stuart Brorson <sdb AT cloud9 DOT net>:
> Yes, it's generally bad practice because the vias will suck solder
> down into the hole and away from the pad during reflow.  This will
> leave the part with little or no solder holding it to the board.
>

Yes, but there are several techniques used in the PCB manufacture
process, which can solve this problem. For example, VIA-IN-PAD, when
holes are filled with a special compound. Sometimes, especially when
using BGA, this is the only possible solution.
But not all PCB manufacturers can do it.

-- 
With best regards,
Eugene Mikhantiev

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019