| http://www.w3.org/ns/prov#value | - A plurality of electrothermal converting elements (each serving as an ink ejection heater) arranged on a silicon base board in the form of a plurality of rows and a plurality of electrical conductors each made of a metallic material such as aluminum or the like to feed electricity to the electrothermal converting elements are formed on a heater board 513 by employing a film forming process.
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