Patent ID: 6557983
Filing Date: 2003-05-06
Classification: B41J

Abstract:
An ink jet head comprising a plurality of ink discharge openings for discharging ink and a substrate made from a material and having a plurality of rows in each of which a plurality of electrothermal converting elements for generating thermal energy for discharging ink from the discharge openings are provided, the ink jet head having an ink supply opening between the rows of the plurality of electrothermal converting elements corresponding to a length of the row, wherein portions of the substrate having the rows in which are disposed the plurality of electrothermal converting elements are connected to each other by a bridging member having a thermal conductivity coefficient nearly equal to that of the substrate, the bridging member being integrally formed from the material of the substrate, the bridging member dividing the ink supply opening for the ink into a plurality of openings only in a direction along the rows, which plural openings each have substantially a same cross-section in a thickness direction of the substrate.