| 摘要 |
PURPOSE:To obtain a high-precision and high-capacity neelde-shaped electrode by using an amorphous metal having high magnetic permeability as material of the needle-shaped electrode and sicking a foil of this metal into an insulating substrate and working it to a needle shape by etching thereafter. CONSTITUTION:An amorphous metal foil 8 is stuck onto an insulating substrate 7 consisting of glass, ceramics, or the like. Needle-shaped electrodes 8' having prescribed width are formed by photoetching, and both end parts of individual electrodes are exposed, and the other parts are covered with an insulating material 9 in this state. By this easy process, needle-shaped electrodes are produced. When a signal voltage is applied to a needle-shaped electrode 3 in a recorder, a partial toner 5 is electrified by charging through an insulating recording member 2. That is, the toner is attracted to the side of a rear electrode 1 by the electrostatic force. When this electrostatic force FE acting upon this toner overcomes a magnetic force FM, the toner is separated from the needle-shaped electrode 3 and is held on the recording member 2 to form a toner image. |
