PGA900: PGA900 SBGA layout, Via setting

hao Su

Part Number: PGA900

Hi:

I want to use PGA900 SBGA. Then I find a problem, the gap of pad is only about 0.2mm. The minimum via hole is 0.2mm , that mean there is no enough gap between via and pad.

How do TI suggest to set size of via in layout for PGA900 ?

thanks

over 6 years ago

0 Scott Cummins over 6 years ago

TI__Mastermind 31655 points

Hello,

I will look to see if we have an example BGA layout for the PGA900 and get back to you by Friday.

Regards,

0 Scott Cummins over 6 years ago in reply to Scott Cummins

TI__Mastermind 31655 points

Hello,

I do not currently have an example layout for the BGA, and I am working to put one together to share next week.

Regards,

0 Scott Cummins over 6 years ago in reply to Scott Cummins

TI__Mastermind 31655 points

Hello,

My apologies for the delay. This has taken longer than expected. I will get back to you as soon as I am able to get a layout example ready.

Regards,

0 Scott Cummins over 6 years ago in reply to Scott Cummins

TI__Mastermind 31655 points

Hello,

Is the minimum via hole constrained by your manufacturer or by something else? Even with a 0.2mm via there should be enough room between the balls on the bottom of the PGA900. The minimum distance between two balls is about 0.2mm, but there is much more space outside of the area directly between them. In the center of 4 balls the distance between 2 of them is about 0.4mm, which allows plenty of space for a via without shorting two pins. See below:

0 hao Su over 6 years ago in reply to Scott Cummins

Intellectual 560 points

Hi Scott

thanks, It fix my problem.

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PGA900: PGA900 SBGA layout, Via setting