which solder paste?

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Time to get more solder paste and have no clearer ideas on t... - Jul 16, 2019 by jamesbowers

In VERY general terms, water soluble flux is usually better ... - Jul 16, 2019 by Steve Thomas

From your post I would say send your board to a contract man... - Jul 18, 2019 by Evtimov

Get GC10 - the game changer: https://www.soldergamechanger.c... - Jul 21, 2019 by Reckless

jamesbowers

#83003

which solder paste? | 16 July, 2019

Time to get more solder paste and have no clearer ideas on the matter than last time. Going through the smaller jars on Digikey these two stand out (as I think they did last time!):

One's Water Soluble (that's the one I got last time) and the other No Clean.

Do I stick with the Water Soluble (since it's now no longer reflowing - but it is old - I'm angry with it) or go for the No Clean?

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Steve Thomas

#83004

which solder paste? | 16 July, 2019

In VERY general terms, water soluble flux is usually better at getting good wetting of the soldered connections unless you have a very well controlled process, in which case no-clean can be very handy (you don't have to clean).

Water soluble flux residues MUST be removed from the board.

Do you have an efficient cleaning process? If not, I would use no-clean.

For the record, there are many, many versions of each, and they may or may not behave differently or provide different benefits depending on what you're doing with them.

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Evtimov

#83020

which solder paste? | 18 July, 2019

From your post I would say send your board to a contract manufacturer and don't worry about it. NC process is preferred method overall, unless there is a special requirement for Water wash.

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Reckless

#83045

which solder paste? | 21 July, 2019

Get GC10 - the game changer: https://www.soldergamechanger.com/en/gamechanger.html

They got a new model GC18 I am trying to get my hands on to see the improvements.

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