| 摘要 |
PURPOSE:To prevent the quality of printed images from being deteriorated and ensure high reliability, by a method wherein a material for a recording needle is provided in the form of a layer on the entire surface on one side of an electrode substrate by plating, and a recording needle pattern is formed by photo-etching. CONSTITUTION:A ceramic comprising manganese oxide and silicon dioxide as main constituents is used as a material for the electrode substrate, and nickel- tungsten is used as a material for the recording needle. A substrate material comprising manganese oxide and silicon dioxide as main constituents is formulated, followed by crushing, mixing and spray drying, then a green sheet is formed, and is simultaneously fired in a reducing atmosphere. After vapor-depositing nickel-chromium and copper on one side of the substrate, a layer of nickel-tungsten is provided by electroless plating, and the recording needle is formed by photo-etching, thereby producing a recording head. When printing is conducted by the recording head in which the hardness of the recording needle is higher than that of the substrate electrode, the electrode substrate is abraded faster, so that a recording end face of the head is constantly maintained in the condition wherein the recording needle is projected from an end face of the electrode substrate. |
