| http://www.w3.org/ns/prov#value | - Referring to FIG. 5, there is shown a further embodiment, in which a heater board 2 made mainly of Si and having a surface electrothermal transducer element layer (energy generating element) for generating energy used for ejection of an ink, is disposed on a part of a supporting plate 1 made of metal such as aluminum or the like.
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