Xaar Technology Limited

Xaar Plc

James Ashe

Christopher David Phillips

Stuart Philip Speakman

Stephen Temple

Andrew Lee

A drop-on-demand piezo-electric printhead has channel walls defined by piezo-electric material ( ) with electrodes ( ) along the length thereof. In portions of the channels which are open to an ink supply conduit, the piezo material is locally disabled, e.g. by reducing the width of the electrode or by interposing a material ( ) of lower dielectric constant between the electrode and the piezo material. A lower capacitive load results.

Method of manufacturing a droplet deposition apparatus

A ceramic piezoelectric ink jet print head having at least one channel with walls coated with a multi-layer coating including an electronic barrier layer and an electrically conducting layer where the electric barrier layer is disposed between the channel well and the electrically conducting layer.

Ceramic piezoelectric ink jet print heads

A process for the selective passivation of the channel walls of a channelled ink-jet printhead component by the chemical vapor deposition of a passivant coating, the process comprising mounting the component in a support in registration with a datum location therein, the support having masking means for masking selected areas of the component, and depositing the passivant coating on unmasked portions of the channel walls.

Passivation of ink jet print heads

A drop-on-demand piezo-electric printhead has channel walls defined by piezo-electric material (,) with electrodes (,) along the length thereof. In portions of the channels which are open to an ink supply conduit, the piezo material is locally disabled, e.g. by reducing the width of the electrode or by interposing a material (,) of lower dielectric constant between the electrode and the piezo material. A lower capacitive load results.

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Edinburgh, United Kingdom

James Ashe