Definition for Fine Line and Spacing PCB

While there is no strict IPC definition for what constitutes a “fine” line, we generally define this as including boards with 2 through 5 mil line and spacing.

Applications for Fine Lines and Spaces PCB

The ever increasing need to do more in less space has driven the need for finer lines / spaces and higher density features. Further, as component manufacturers design ever tighter component footprints, PCB designers are often forced into tight circuit designs. Our customers span a wide range of industries, including: Military; Telecommunications; Industrial Controls; and Automotive.

We Attack the Perils of Imaging in a Few Different Ways

Photo-Imageable Dry Film: We have identifed and stock a variety of dry films that have specific characteristics for specific features. When our operators encounter fine lines on inner and outer layers, they change out our laminators to replace the standard dry film with premium dry film that resolves images with greater clarity.
Exposure Units: The process for imaging works such that the artwork is placed over a production panel that is coated with a photo-imageable dry film. UV light is then turned on to expose the film per the artwork, much like taking a film picture. Typical exposure units have a single point light source that is spread across a production panel using reflectors. Unfortunately, the reflectors cause the light to hit the panel at an angle, which is not conducive to fine line imaging.

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