Ink jet substrate including plural temperature sensors and heaters

A recording head, comprising:

• a substrate including
• a plurality of built-in energy generating elements for generating thermal energy for ejecting liquid, said energy generating elements forming an array,
• a built-in electrode wiring portion for supplying electric signals to said energy generating elements,
• first and second built-in temperature sensors disposed outside the array, said sensors being disposed adjacent opposite ends of the array, respectively, for detecting a temperature of said substrate, and
• first and second built-in heaters disposed outside the array, said heaters being disposed adjacent opposite ends of the array for heating said substrate;
• a common chamber for containing ink on said substrate;
• ink passages for maintaining the ink supplied from said common chamber, said ink passages corresponding to said energy generating elements;
• ink ejection outlets communicating with said ink passages and through which the ink is ejected for recording,
• wherein an upper portion of said heaters are outside said common chamber and outside an ink maintaining portion of said ink passages.

A liquid jet recording apparatus, comprising:

• a substrate including
• a plurality of built-in energy generating elements for generating thermal energy for ejecting liquid, said energy generating elements forming an array,
• built-in electrode wiring for supplying electric signals to said energy generating elements,
• first and second built-in temperature sensors, disposed outside said array and adjacent opposite ends of said array, respectively, for detecting a temperature of said substrate,
• first and second built-in heaters disposed outside the array, said heaters being disposed adjacent opposite ends of the array, respectively, for heating said substrate;
• a common chamber for containing ink on said substrate;
• ink passages for maintaining the ink supplied from said common chamber, said ink passages corresponding to said energy generating elements;
• ink ejection outlets communicating with said ink passages, wherein ink is ejected from said outlets for recording;
• and
• control means responsive to said first and second sensors for controlling said first and second heaters, wherein an upper portion of said heaters is outside the common chamber and outside an ink maintaining portion of said passage.

A liquid jet recording apparatus, comprising:

• a substrate including
• a plurality of built-in energy generating elements for generating thermal energy for ejecting recording liquid, said energy generating elements forming an array,
• a built-in electrode wiring portion for supplying electric signals to said energy generating elements,
• first and second built-in temperature sensors disposed outside the array, said sensors being disposed adjacent opposite ends of said array, respectively, for detecting a temperature of said substrate,
• first and second built-in heaters disposed outside the array, said heaters being disposed adjacent opposite ends of the array for heating said substrate;
• a common chamber for containing ink on said substrate;
• ink passages for maintaining the ink supplied from said common chamber, said ink passages corresponding to said energy generating elements;
• and
• ink ejection outlets communicating with said ink passages and through which the ink is ejected for recording,
• wherein upper portion of said heater are outside said common chamber and outside ink maintaining portions of said passages, and wherein said substrate includes a region wherein a plurality of switching elements are disposed for selectively driving the plurality of energy generating elements and a region wherein matrix wiring is disposed between said energy generating elements and said switching elements.