| 摘要 |
The objective of this invention is to provide a head substrate capable of integrating driver transistors while keeping the size small even at high nozzle density, and integrating a functional circuit such as a temperature sensor or energy adjustment circuit. To achieve this, an ink supply port, a heater array which is arrayed along the longitudinal direction of the ink supply port and includes a plurality of heaters, a transistor array which is arrayed along the arrayed direction of the heater array and includes a plurality of transistors for driving a plurality of heaters, and a logic circuit which drives the transistor array are arranged on a head substrate. The logic circuit is arranged between the heater array and the transistor array.
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