| 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 a thick film printing method, 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 tungsten is used as a material for the recording needle. A substrate material comprising manganese oxide and silicon dioxide as main constituents if formulated, followed by crushing, mixing and spray drying, then a green sheet is formed. Tungsten and an organic binder are mixed with each other, and the resultant mixture is ground and is kneaded to produce a conductor paste. The paste is applied to the entire surface on one side of the green sheet by printing, and is fired in a reducing atmosphere, followed by providing the recording needle to produce 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 than the needle, so that a recording end face of the head is constantly maintained in the condition wherein the recording needle is projected. |
