Electrographic writing head and its method of manufacture.

摘要

The writing head including a substrate having a first surface and a second surface, the first surface having thin film elements fabricated thereon, the first surface having a first region, a second region, and a third region, the first region including an array of writing electrodes, the second region including an array of high voltage transistors, and the third region including interconnecting circuitry for connecting the thin film elements to a connector. The head also includes a first cover glass fixed to the first surface of the array covering the first region and a second cover glass fixed to the first surface of the array covering the third region. Also included are a first side glass fixed to the second surface of the array and a second side glass fixed to the first cover glass and the second cover glass whereby a channel is formed over the second region of the array where the high voltage driving transistor is located.