Design rules suggest that MLCCs should be placed away from board edges and panel break out zones for reasons illustrated in this example.

bad-board-design-1

The MLCC was placed far too close to the breakout feature during the design phase for this product.

bad-board-design-2

This is a higher magnification image of the flexure fracture that caused the MLCC to short circuit some time after the board was placed into service.

Check out SEM Lab, Inc.  to learn more.

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