For example, take the drill data. When laying out a board, you usually work with finished hole sizes. This can lead to problems in maintaining annular ring requirements and copper spacing on internal layers. To meet manufacturing specs, the fabricator might have to modify the data, and that's the last thing you want. The data are fed into a fab analysis tool and run through their paces.
Clearances are good.
No possible soldermask flaking. Spacing between the drills is just right. No unexpected phone calls, no changes in the layout, and the fabricator happily sends back a good set of boards on time. Ray Fugitt is technical marketing engineer, manufacturing solutions at Innoveda. Electronic Controls Design Inc. All Rights Reserved .