21.
    发明专利
    未知

    公开(公告)号:FR2298436A1

    公开(公告)日:1976-08-20

    申请号:FR7539614

    申请日:1975-12-17

    Applicant: IBM

    Abstract: In an ink jet printing system, a single nozzle or an array of nozzles are etched in a semiconductor material such as silicon. Each nozzle has polygonal or N-sided entrance and exit apertures of different cross-sectional area. Preferably, the nozzle is in the shape of a truncated pyramid with the entrance and exit apertures being substantially square in cross-section. The corners of the apertures and wall interfaces may be rounded to reduce stress concentrations.

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