Issue link: https://iconnect007.uberflip.com/i/1417991
46 DESIGN007 MAGAZINE I OCTOBER 2021 tem throughout the value chain, eliminating dependency on third parties. Because it is an open standard, no royalty payments or per- missions are required. It is a complete digital PCB product model that allows the manufac- turer to fabricate, assemble, and test the prod- uct. Most importantly, it is a simple, single file that includes everything from the design to the local BOM data and variants—all the informa- tion needed to be ready for direct process engi- neering tasks. Everything Needed to Build and Test a Product IPC-2581 contains everything needed to build and test the product (Figure 5). • Part geometry and placement information, including centroid and component pin locations • Physical and logical netlists and test points • Completely support for rigid-flex data • Variant data • Intentional netshort data • Full impedance specification for critical signals • Tolerance information on stackup, drills, holes, etc. • Complete support for embedded component information • Multiple ways of placing the active components on inner layers Intelligent, Efficient Handoff e IPC-2851 standard provides rich, intel- ligent digital content for fabrication, assembly, and test. e single file includes a hierarchical BOM with complete component attributes for values, tolerances, units of measure, part rank, part class, and more. Unlike the Gerber and ODB++ formats, IPC-2851 includes a stackup exchange as part of the single file. Having a stackup that is accurate and precise going into the design helps in three aspects: It helps the designer design the board to have the imped- Figure 5: IPC-2851 provides complete data in a single file.