Layout for 9 Pin BGA

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Layout for 9 Pin BGA

    by bdrballard » Mon Mar 17, 2014 12:58 pm

I am trying to use PCB123 to layout for a 9 pin BGA package (a TI DRV2605). The package is arranged as a 3 x 3 array. TI's layout recommendations recommend a 275 micrometer pad size with a maximum trace size of 75 to 100 micrometers. It appears that a .005 inch trace is the minimum I can do. The required trace size is between .0029 and .0039 inches to the array pads. It seems to be impossible to get connectivity to the middle pin in the array.

The array has .5mm spacing on the balls.

Any suggestions on how to solve this problem. Is this impossible with PCB123?

Thanks for your help.

Posts: 1
Joined: Mon Mar 17, 2014 12:48 pm

Re: Layout for 9 Pin BGA

    by Sal Hernandez » Tue Mar 18, 2014 6:04 am

The smallest trace you can create in PCB123 is 5 mils. What another customer has done is designed the part with 5 mil traces then included notes for our Custom Quote team to reduce the trace size in the specific area. This will work, but will leave you with errors within PCB123.

Sal Hernandez
Software Support Engineer I
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226
Fax: 503-829-5482
Sal Hernandez
Posts: 381
Joined: Wed Jul 06, 2011 12:00 am

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