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smt common pad 0402 and 1206 package

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#75664

smt common pad 0402 and 1206 package | 6 May, 2016

Hi All,

One of my customer has provided a pcb design having common pad for 0402 and 1206 package(i.e 3 pads in the gerber, pad1,pad2 belongs to 1206 package and pad2,pad3 belongs to 0402 package) Will this create any solderability issue. Is anyone experienced this kind of design during the production.

Please suggest any solution. Issues that can happen, If we accept the design.

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#75667

smt common pad 0402 and 1206 package | 6 May, 2016

The first issue I see is that you have a high potential of the 402 tombstoning.

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#75668

smt common pad 0402 and 1206 package | 6 May, 2016

You're correct. This design will have a record amount of 0402 rework for tombstoning and misalignments.

Suggest that the pads on each end of all components be the same size in order to balance wetting forces during reflow.

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#75683

smt common pad 0402 and 1206 package | 9 May, 2016

I agree with the previous two replies. This is a perfect design....if you're trying to create a graveyard full of tombstones.

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