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34 DESIGN007 MAGAZINE I OCTOBER 2018 2. Next, consider adding descriptive nomen- clature to each specific artwork layer to identify its function, and graphically link it to its associated data file (Figure 7). Upon viewing, there is no question that this artwork represents the bottom-side signal layer as revision A of part number 424242-42 derived from the 424242-42_A_LAY_4.PHO data file. 3. Lastly, name your data files to corre- spond to the descriptive list on each layer of artwork. With a naming format, files can be audited for completeness and moved to CAM without previewing and deciphering beforehand (Figure 8). Adopting this simple, but descriptive, nam- ing methodology for any manufacturing design data package will go a long way in helping your PCB manufacturing stakeholders to serve you better. DESIGN007 Kelly Dack provides PCB design and manufacturing engineering services for a dynamic EMS provider in the Pacific Northwest. Additionally, he serves on the executive staff of the IPC Designers Council and is employed by EPTAC Corporation as a CID instructor. To contact Kelly, click here. Figure 7: Descriptive nomenclature for each artwork layer helps identify its function. Figure 8: Data file names should correspond to the descriptive list on each layer of artwork.