Ink jet recording system having improved functional devices for driving energy generating members

摘要

A recording head comprises electrothermal transducers for jetting ink and functional devices for driving these electrothermal transducers, both of which are arranged on a single substrate plate. The functional devices comprise a pair of major electrode regions such as drain and source regions arranged on the substrate plate, a region comprising control electrode region and surrounding one of electrode regions used to be grounded, an insulating layer arranged on the control electrode region and a control electrode arranged on the insulating layer. The control layer alters the semiconductor types of a boundary surface of the control electrode region by applying a control voltage through the insulating layer and as a result a current flow between major electrode regions, source and drain, is controlled.