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SD Card holder solderability

Views: 2763

#69650

SD Card holder solderability | 30 June, 2013

HI there,

I am having problem on the solderability for the fine pitch lead on SD card holder on this pcb.Have tried different kind of temperature settings on the reflow but the problem still occurred.Pls refer to the attached pictures.And when i just reflow this pcb without the sd card component,solderability looks great.pleased to hear

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#69657

SD Card holder solderability | 1 July, 2013

A couple things to look at..

Are you using Pb-Free solder? What are the leads of the SD Connector tinned with?

Do you have a thermal profiler to use to verify your oven profile? (If not, you may be able to ask a Sales Rep to come in and assist you using a Demo Unit)

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#69659

SD Card holder solderability | 1 July, 2013

I am guessing a lead free process. From the pictures, I don't neccessarily see any issues, perhaps the leads have wicked up a little too much solder, making the joint look a little starved. But I think I see nice toe and side fillets.

In the worst case, you have answered your own question... introducing the SD Card Holder causes issues with the joints. Clean and perhaps re-tinning the SD Card leads if the volume is small enough. Rejection back to Vendor and Replacement of the parts due to some kind of surface contamination if you are looking at a large qty. 'hege

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#69670

SD Card holder solderability | 1 July, 2013

Hi there,

Its a lead free process and the paste that we're using is with this alloy composition : Sn,Ag,Cu,Bi,In....

Pls refer to the attached temp.profile....

This is a mirror Pcb....Same components on both A and B side....

A side doesn't have this issue.......

And now customer is blaming on reflow oven and not the component itself....

Pls give me your thoughts....

Cheers

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#69671

SD Card holder solderability | 1 July, 2013

And this process is using a kind of ceramic jigs.....

Does this jig absorb much heat that does not dissipate enough heat to the SD card pins ?

Thanks

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#69673

SD Card holder solderability | 2 July, 2013

kumar, can you explain why in zones 5, 6 and 7 you use different temperature on upper and lower heaters? Do you use a Nitrogen in your reflow oven?

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#69684

SD Card holder solderability | 2 July, 2013

HI,

She's running on air mode

Since its a 7 zone japanese reflow,these were the best settings i could get via profiling

Thank you

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#69751

SD Card holder solderability | 10 July, 2013

HI guys,

Problem solved.....reason is the SD card's location in on the fixed side of the reflow oven,i believe there is not much convection heat blown towards the component....

Pleased to hear if any

rgds

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