| 摘要 |
PURPOSE:To obtain an inexpensive electrode head having high resolving power and high reliability, by constituting the electrode head so that a large number of grooves are formed to the surface of a first electric insulating support and electrode needles are provided to respective grooves and the grooved surface of the first support is covered with a second electric insulating support to fill the gaps formed by the first and second supports and the electrode needles with a resin. CONSTITUTION:Grooves are processed to the surface of a first electric insulating support 101 and, as the material quality of the support, for example, a sintered body of hexagonal boron nitride or gypsum having softness imparting no damage to the surface of recording paper other than an electric insulating property is pref. used. Further, in a composite such as a resin, hexagonal boron nitride, calcium carbonate and talc etc. may be used as a filler and a second support 102 also has the same material quality. As an electrode needle, a coated copper wire is pref. from an aspect for preventing the shortcircuit with the adjacent electrode needle generated when electrode needles are arranged at high density. The firsts and second supports 101, 102 and the electrode needles 103 are fixed by filling the spaces formed by all of them with a resin 104. By this method, an electrode head having high resolving power can be inexpensively manufactured and high reliability can be realized and an excellent recording apparatus can be provided. |
