Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


No-clean paste flux v.s RMA solder

Por

#23774

No-clean paste flux v.s RMA solder | 12 March, 2003

Hi all

Pls. help advise. Our board use RMA solder paste (Pb-free Sn96.5/Ag3.0/Cu0.5). Can we use No-clean paste flux (Delta 670S1) in rework process? If it can not be used, why?.

Thanks very much for your advice. Surachai

reply »

MA/NY DDave

#23776

No-clean paste flux v.s RMA solder | 12 March, 2003

Hi

I don't see in your note any particular reasons why you couldn't. If it solders well and passes what ever specifications you are using than everything is OK.

If your repair faces some soldering or rework challenges where a more agressive flux is needed than you will have to move up the chain.

YiEng, MA/NY DDave

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

#23778

No-clean paste flux v.s RMA solder | 12 March, 2003

J-STD-001C, 7.2.1 Flux Application says words to the effect of: When an external flux is used in conjunction with flux cored solders, the fluxes shall be compatible.

Regardless of whether these are or not flux cored solders, this begs the question: How compatible are the two fluxes that you are using?

Another question for you is: Are you cleaning the RMA?

reply »

Non-heated dispensing system

Reflow Oven