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78 SMT Magazine • November 2015 by Pat mcGoff MeNTor grApHicS Abstract PCB assembly designs become more com- plex year-on-year, yet early-stage form/fit com- pliance verification of all designed-in compo- nents to the intended manufacturing processes remains a challenge. So long as librarians at the design and manufacturing levels continue to maintain their own local standards for compo- nent representation, there is no common repre- sentation in the design-to-manufacturing phase of the product lifecycle that can provide the ba- sis for transfer of manufacturing process rules to the design level. A comprehensive method- ology must be implemented for all component types, not just the minority which happen to conform to formal packaging standards, to successfully left-shift assembly and test DFM analysis to the design level and thus compress NPI cycle times. The elements of such a solu- tion include implementing de-facto standards for package and pin-type classifications, as well as DFM analysis rules that are associated with these classifications and the intended manufac- turing processes. The resulting solution enables the transfer of DFM rules from the manufactur- ing process expert to the design and NPI engi- neers on the design side responsible for verify- ing manufacturing-process compliance of new product designs. This paper will demonstrate the technologi- cal components of the working solution: the logic for deriving repeatable and standardized package and pin classifications from a com- mon source of component physical-model con- tent, the method for associating DFA and DFT rules to those classifications, and the transfer of those rules to separate DFM and NPI analysis tools elsewhere in the design-through-manu- facturing chain, resulting in a consistent DFM process across multiple design and manufactur- ing organizations. Following establishment of a common source of component definitions and classifications, rules-based generation of assem- bly-level machine libraries is enabled from the same source that drove the DFM process, result- ing in right-first-time launch of a new product into the manufacturing process. Introduction The principles of lean manufacturing, "get- ting it right first time," and minimizing waste and unnecessary manual interaction, are all fa- miliar and generally accepted as contributing streamlining pcb assembly and Test NpI with shared component Libraries arTIcLe

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