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(714) 490-7600 West Coast (603) 864-1303 East Coast FREEDOM CAD EXPERT PCB DESIGN TIP #3: Don't stack your micro vias! " The expertise of the Freedom CAD team, and their 'CAN-DO!' attitude, have been significant to the success of several of my complex HDI PCB designs. " Henry Schrader Principal Engineer LionFish Labs Free book! Fine Pitch components and increasing board densities have increased the use of HDI in multilayer printed circuit boards. Extensive testing by the IPC has identified a high potential for microvia failures in >2 stacked microvias due to micro fractures caused by thermal stresses. The IPC recommends staggering these micro vias to improve micro via reliability.

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