Ivan,

First we need to know the type of flux you are using, solids contents, etc.
Also a run down of your process setup.
Leaving too much residue on the board can be caused by several factors.
   Too much flux
   Preheat not set correctly
   Type of flux
 No-clean flux does not mean no-residue, there is always some.
You may also have to change the type of test pin you are using to penetrate
the residue and minimize pin cleaning.

Regards,
Ken




 (Embedded
 image moved   Ivan Barrios <[log in to unmask]>
 to file:      07/26/99 02:09 PM
 pic17925.pcx)




To:   [log in to unmask]
cc:    (bcc: Kenneth Kirby/ElectrovertUS/Cookson)
Subject:  [TN] No clean flux residue




Hello Technetters:
Being new to the list, I do not know if this issue has been discussed in
the
past, so here goes. What can be done to minimize/eliminate the residue left
by
the no clean fluxes on the PCB's? We currently have a big issue with
residue not
allowing our test pin probes to make contact. We have implemented cleaning
the
probes on a regular basis, but I want to eliminate the issue altogether. If
this
has been discussed, please point me in the right direction (archived
responses).
If not, I would really appreciate your help.
Ivan Barrios
Process Engineer
Conexant Systems
El Paso, TX,

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