| 摘要 |
PURPOSE:To obtain the titled device, wherein an angle formed by the line connecting the center of the arc of a gate electrode surface and the tip of a stylus and a stylus arranging plane is set in a specified range, dispersion in flying quantity of the magnetic ink is small, and noise flying does not occur. CONSTITUTION:The angle theta formed by the straight line connecting the center 0 of the arc of the gate electrode 13 and the arranging plane of the stylus 1 is made smaller than 180 deg.. The dispersion in the flying direction occurs to the right and left sides with respect to the optimum direction (e), owing to the undulation of the arranging plane. However, the dispersion occurs in the side where the ink is hard to fly, with the swelled tip, from which the ink is easy to fly, as the center. The dispersion can be made smaller by 1/2 or less in comparison with that in the conventional device. The noise flying from the part other than the swelled tip part of the stylus 1 can be also made small. |
