TECHNET Archives

March 1997

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:
Date:
Wed, 05 Mar 97 10:17:46 CST
Content-Type:
text/plain
Parts/Attachments:
text/plain (53 lines)

If the boards are solder coated, try running them through a surface mount reflow
oven before assembly. Don't flux, just let them blow where they will. If the 
solder coating is thin, solderability may be affected, but this might take care 
of the assembly-level blow hole problem.

______________________________ Reply Separator _________________________________
Subject: Assy: Blowhole
Author:  [log in to unmask] at smtplink
Date:    3/5/97 6:41 AM


I have a serious problem on some of the board that stucked in the store. 
All of them is at least 2 years.
When I  wave-soldered the bare board, it has a lot of blow-holes, solder 
balls, pin-holes.

Anyway, I try to purge all of them, but there are 6000 pieces in the Store.

I try to bake at at 100 deg. C for 4 hours. Too bad, it doesn't work.

I try to bake for any 4 hours just before wave-soldering. The result is 
terrible. Not even a slight Help !!!

Can anybody give me some advises what should I do ???

Thanks in Advance

Poh ..

*************************************************************************** 
* TechNet mail list is provided as a service by IPC using SmartList v3.05 * 
*************************************************************************** 
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   * 
* with <subject: subscribe/unsubscribe> and no text in the body.          * 
*************************************************************************** 
* If you are having a problem with the IPC TechNet forum please contact   * 
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      * 
***************************************************************************


***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To subscribe/unsubscribe send a message <to: [log in to unmask]>   *
* with <subject: subscribe/unsubscribe> and no text in the body.          *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************



ATOM RSS1 RSS2