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Proper Fan-out of the BGA pads

Most fine pitch BGAs call for diagonal placement of via capture pads compared to in-line with the surface pads. Flared dog bone fan-out is the most popular method. It allows for better partitioning of the device into four quadrants and gives a widened channel for routing in the “Plus sine/Cross” region of the BGA, shown here:

Via Capture Pad for 1.00mm FlipChip BGA NSMD Land Pads

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