| 摘要 |
PROBLEM TO BE SOLVED: To obtain an excellent high density recording and reproducing device by reproducing information recorded by a head under the state of noncontact with a recording medium in a prescribed area in detecting a changing quantity of electric charge or capacitance or surface potential. SOLUTION: A recording head HR is composed of a leaf spring in a narrowplate shape or the like formed with an acicular electrode 21 in a conical shape, a triangular pyramidal shape or prismatic shape having a cross section of a triangle, etc., at the tip, capable of point contact or microarea contact with the recording medium, and is constituted of a cantilever 22 whose one end is fixed. This cantilever 22 consists of Si of a spring constant 0.01 to 10N/m or SiN, and high electric conductivity is imparted to the cantilever by coating its surface with a metal layer or metal layers in a single layer or multilayer structure of Au, Pt, Co, Ni, Ir, Cr, etc. The recording medium 10 is placed on a placing base 30, and is moved, for instance, in the directions of x-axis y-axis, which are orthogonal to each other or is rotated, while the placing base 30 is controllable of moving in the direction of z-axis which is perpendicular to the surface direction of the recording medium 10, so as to adjust a state of contact with the acicular electrode 21.
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