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Vivace Networks, which was recently acquired by Tellabs, Inc., of Naperville, IL, makes very complex circuit boards with more than 9,000 nodes, ball grid array (BGA) and micro-BGA devices with more than 400 pins, 32 layers per board and numerous application-specific integrated circuits (ASICs) with as many as 1,247 pins. Besides the fact the new division of Tellabs could only get 40 percent test coverage on such a board, producing in-circuit test (ICT) fixtures to thoroughly test boards like this was proving to be a very expensive and time consuming proposition.
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