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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Reflow profile adjustment with different kind of PCB

Snehal Acharya

#29966

Reflow profile adjustment with different kind of PCB | 10 August, 2004

Hi to all, I'm facing a soldering problem with one of my series of Product, since we were using a two different kind of PCB 1.GE(Glass Epoxy)2.PP(paper phenoline) in later PCB if i will use the same profile of the GE then it will get backed more & its color become more brownish type if i will reduce the profile setting then solder is not melting at all & i have to pass the board twice , if anybody knows the solution pls kindly help me.

regards, Snehal Acharya

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#29971

Reflow profile adjustment with different kind of PCB | 10 August, 2004

The thermal recipe you use is dependant primarily on the solder paste that you choose.

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C Lampron

#29979

Reflow profile adjustment with different kind of PCB | 10 August, 2004

Snehal,

Look at the spec sheet for the paper phenoline PCB. Look at the max temp. If it is at or lower than 183 degrees C, here lies the problem. If it will withstand higher temps at a shorter durration, you can possibly speed up the belt but like Dave said, your profile is usually dependant on solder paste specifications. The key will be meeting the solder paste specifications without exceeding the paper phenoline specs.

Good Luck

Chris

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Snehal Acharya

#30000

Reflow profile adjustment with different kind of PCB | 11 August, 2004

Hi Davef & C Lampron. Thanks for your reply. since i'm using RMA9086 62/36/2 Cookson no clean flux paste.so what do you think if i will switch on to the paste without no clean flux for PP board is there be any chance that i get a +ve result. Awaiting for your feedback.

Regards, Snehal Acharya

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Dreamsniper

#30198

Reflow profile adjustment with different kind of PCB | 24 August, 2004

The best is, create 2 different profiles for each PCB type. Then segregate or separate them and do not let them run together in one line. Switch to the proper profile settings each time you change to other PCB type. This is the best. Each PCB material type has their own Thermal Characteristics and they behave differently from each other.

regards,

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