Tom:

We use a minimum of .007" wide, and approx. .040" high characters. Although
.010" wide and .065" high characters are preferred.

When the board density or aspect ratio of the characters prevents the
letterscreen from being enlarged, we use an LPI letterscreen which can
produce very sharp looking characters down to approx. .005" wide and .030"
high. The downside to this process is that it involves an additional imaging,
developing, and bake cycle.

John Lennox
EMC

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