We use Alpha PF1on our inerted wave solder system.  By spraying the flux
liberally,  being sure that the flux gets up into the holes, we get
consistently good results.

I keep the top side board temperature at 215F and use both
the chip and laminar waves with a solder pot temperature of
465F.The wave heights must be raised to accommodate the
 thicker boards.

You have to maintain your temperatures closely and be sure
that your boards and components are clean and unoxidized
for the process to work.

John Ryaby
Process Engineer

> ----
> From:
> [log in to unmask][SMTP:[log in to unmask]]
> Sent:         Monday, January 05, 1998 1:54 PM
> To:   [log in to unmask]
> Subject:      [TN] Any No Clean Flux for Thick PCB's?
>
> Has anyone had any success using a no-clean flux on thick (0.090")
> multi-layered
> thru-hole PCB assemblies?
>
> We want to switch to a no-clean flux from our present aqueous system.
> Our
> Electovert currently has a foam fluxer but would get a jet-sprayer if
> the flux
> was right. However, we tried a few demo no-clean fluxes and
> experienced problems
> with our larger and thicker multilayer boards as far as solder wicking
> up to the
> top-side on feed-thru's. We even added extra heated air-knives and to
> no avail.
>
> If you have had success with any particular no-clean fluxes, please
> let me know
> what they are.
>
> Thank you.
> Fred
>
> ##############################################################
> 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.
> For the technical support contact Dmitriy Sklyar at [log in to unmask] or
> 847-509-9700 ext.311
> ##############################################################
>

##############################################################
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.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
##############################################################