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no-clean process

#23955

no-clean process | 28 March, 2003

We are going to be using a no-clean paste (smt)and no clean wave solder flux on a small pcb we will be doing here soon. As far as the wave process, should i purchase a new fluxer stone for the no-clean. Should I also purchse the recommended thinner or is isapropal ok. What else do i need to consider? We are considering kester #951 or 959.

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MA/NY DDave

#23960

no-clean process | 28 March, 2003

Hi

Yes to your stone question. This pretty much goes with any flux change.

Yes to the proper solvent for the flux you choose. Check with the Kester Data Sheets.

Kester should have some application sheets which include some No-Clean information.

One thing you want to prepare for is rework. It will be different.

YiEng, MA/NY DDave

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MA/NY DDave

#23961

no-clean process | 28 March, 2003

Hi

Notice they do call out that you should use their thinner. In the MSDS you get a clue as to the thinner they are mostly using with some additives.

http://www.kester.com/PDF%20FILES/PDF%20Data%20Sheets/E%20No-Clean%20Fluxes/951%20(30Mar98)logo.pdf

YiEng, MA/NY DDave

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#23968

no-clean process | 29 March, 2003

Barry

Echoing an earlier poster, replace your stone.

Use the suppliers' recommended thinner. Do NOT use isopropanol [IPA]. IPA contains water. Water is the bane of low residue soldering. It will get you in trouble fast.

From IPC, get your hands on TP-1115 - Selection And Implemetation Strategy For A Low-Residue, No-Clean Process.

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