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Ink jet printing nozzle arrays in the form of truncated pyramidal holes anisotropically etched into a silicon substrate have been fabricated. Eight-nozzle arrays dixplay excellent performance characteristics with regard to uniformity of direction (± 1mra), velocity (± 10 cm/sec) at 1000–3000 cm/sec), and drop formation.
Bassous et al. (Fri,) studied this question.