TECHNET Archives

July 2000

TechNet@IPC.ORG
Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Re: Design Rules; RE: Component Spacing
From:
Eric Miller <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Mon, 24 Jul 2000 12:53:01 -0700
Content-Type:
text/plain
Parts/Attachments:
text/plain (63 lines) 
Hello Gary. In the fixture business, we like to see .100"-.150" spacing
between the SMD and PTH. This gives us enough room to place a wall of
composite material between the two components, while still leaving enough
area around the PTH to have good soldering to the joint. If you are still in
the design phase of the circuit board, "ask for at least" .100", Preferably
more, this will allow for good solder flow to the component,PTH, while also
giving you the advantage of placing the circuit board in a fixture. I should
say, it gives you the "option" of placing the pcb into a fixture! This is
know as "Selective Soldering", a technique used with the major Contract
Mfg's of the world. The process of selective soldering, using a pallet or
fixture, helps eliminate the need of the gluing of SMD's to the bottom side
of the pcb, along with many other advantages. If you have any other
questions, contact me off line at [log in to unmask]

Eric Miller
Corporate Sales
S.P. Precision International, Ltd.
1-800-PALLETT
http://www.spprecision.com/

-----Original Message-----
From: Smith, Gary [mailto:[log in to unmask]]
Sent: Monday, July 24, 2000 12:14 PM
To: [log in to unmask]
Subject: [TN] Design Rules; RE: Component Spacing


Would anyone know the minimum recommended distance of the lead from a
through hole component protruding through the bottom of a PCB and the
nearest component to ensure proper wave soldering on the leads without voids
or bridges??

-Gary Smith

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Keach Sasamori at [log in to unmask] or
847-509-9700 ext.5315
##############################################################

ATOM RSS1 RSS2