TECHNET Archives

January 2001

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:
From:
Kathy Kuhlow <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 11 Jan 2001 09:41:36 -0600
Content-Type:
multipart/mixed
Parts/Attachments:
text/plain (1881 bytes) , TEXT.htm (2560 bytes)
Steve, 

Ina very past life we produced a product similar.  We were able to control the solder running and maintain the solder tension at the pad site by having the trace necked down considerably (bare minimum width) to force and create as large a solder dam as possible.

Kathy 

>>> [log in to unmask] 01/10/01 07:15PM >>>
Hey all,

We've got a job in here that's going to be a few RF assembies. It uses
surface mount in the design, but the board doesn't have any soldermask at all
on the surface.

The last time I dealt with something such as this, and tried to print solder
paste, place components, and reflow, all I wound-up with is a bunch of
tomb-stones, and insufficient solder all over the board because the solder
wants to flow out all along the surface layer traces, and goes where-ever it
wants to go...because there's no soldermask to contain it.

I'll try to post a picture of what I'm getting ready to deal with on my
free-drive tomorrow...

This is not high volume at all, but from past experience it's my take that we
should just hand solder stuff like this...because we'll wind-up touching-up
everything anyway...have any of you ever dealt with stuff like this before?

-Steve Gregory-

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------


ATOM RSS1 RSS2