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Solder paste volume require.

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EC

#41924

Solder paste volume require. | 1 June, 2006

Hi,

I facing some 1005 component with poor wetting and look like not enough solder...... Is there any standard solder paste volume requirement.

Appreciate all the input.

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RDR

#41929

Solder paste volume require. | 1 June, 2006

IPC a 610 has this info. An 0402 however mat require more solder than what IPC states (basically evidence of wetted fillet for class2). more paste = more flux = better wetting.

Why don't you tell us what pad sizes and layout you have and stencil thickness.

Russ

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EC

#41947

Solder paste volume require. | 1 June, 2006

Hi Russ,

Thanks for your input. Currently, our stencil is at 5 mil thickness and the paste height from 5.5 to 6.5mil. I have increase the paste height to 7 to 7.5 mil and great improve....... I just need some data to present to my management and telling them that stencil thickness need to change.

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RDR

#41954

Solder paste volume require. | 2 June, 2006

Hmmm interesting, we utilize 5 mil stencils and print to same height as you and do not experience these failures. May I ask what paste you are using and what the spacings are of your pad design? But anyhow, if it works it works.

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EC

#41968

Solder paste volume require. | 4 June, 2006

Hi Russ,

I could not send any attach file using smtnet.......anyway thanks your input.

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#41994

Solder paste volume require. | 6 June, 2006

Be carefull of the effect on other components with a 7mil stencil, like fine-pitch devices will bridge more, excess solder.

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#42002

Solder paste volume require. | 7 June, 2006

can you also please tell us the section in IPC-610?...is this in RevD?

also, does this also give the solder volume for BGAs?

Thanks, Amol

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