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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


BGA and Land Patterns

Frank Hinojos

#11696

BGA and Land Patterns | 27 April, 1999

What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference?

Thanks,

Frank

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Justin Medernach

#11697

Re: BGA and Land Patterns | 27 April, 1999

| What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? | | Thanks, | | Frank | Frank, Refer to the device manufacturers. they are going to have a recommended land geometry. IPC 782 might have something as well.

Regards, Justin

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Bob Willis

#11698

Re: BGA and Land Patterns | 28 April, 1999

| | What is the current spec for sizing PCB pads for a land grid array? How about for a ball grid array? Are there industry spec's I can reference? | | | | Thanks, | | | | Frank | | | Frank, | Refer to the device manufacturers. they are going to have a recommended land geometry. IPC 782 might have something as well. | | Regards, | Justin | There are two documents on BGA which are available on my web site to download. On on design rules and one on rework.

Alternativly there is a design guide and stencil guide I produced for Checmtech one of the lartgest stencil manufacturewrs in Europe on thire web site. www.chemtech.co.uk if you want to get a copy.

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