Abstract: The invention describes a print-head for a continuous inkjet printer having a charge electrode array in which each charge electrode in the array is relatively wide (W) compared to the spacing (s-W) between the electrode. Preferably the width is an order of magnitude greater than the spacing.

Abstract: The invention provides a method of forming a charge electrode array for a binary continuous inkjet printer, the method including forming the charge electrodes and the driver circuitry for the charge electrodes using common process steps. The process steps are preferably those associated with polycrystalline silicon thin-film transistor technology. The invention further provides a charge electrode array for a binary continuous inkjet printer when formed according to the inventive method. Such an array may not only be formed integrally with the driver electronics, but also with a phase detector, a deflector, and a velocity detector.