Abstract: A variable resistor according to the present invention includes a substrate, a resistive element disposed on a first surface of the substrate, oil that coats an upper surface of the resistive element, and a slide member that slides on the upper surface of the resistive element coated with the oil, wherein an output of the variable registor changes as a position at which the slide member makes contact with the resistive element changes. The variable resistor further includes an oil repellent part that surrounds at least a part of the resistive element in plan view viewed from above the first surface of the substrate, the oil repellant part having surface free energy smaller than that of the resistive element, whereby oil can be stably held on a resistive element surface without forming irregularities on the resistive element surface.

Abstract: A variable resistor according to the present invention includes a substrate, a resistive element disposed on a first surface of the substrate, oil that coats an upper surface of the resistive element, and a slide member that slides on the upper surface of the resistive element coated with the oil, wherein an output of the variable registor changes as a position at which the slide member makes contact with the resistive element changes. The variable resistor further includes an oil repellent part that surrounds at least a part of the resistive element in plan view viewed from above the first surface of the substrate, the oil repellant part having surface free energy smaller than that of the resistive element, whereby oil can be stably held on a resistive element surface without forming irregularities on the resistive element surface.

Abstract: A composite piezoelectric element includes a first electrode layer, a piezoelectric substance layer disposed on the first electrode layer, and a second electrode layer disposed on the piezoelectric substance layer, and, in plan view, a measuring unit including the first electrode layer, the piezoelectric substance layer, and the second electrode layer and a buffer portion in which the piezoelectric substance layer is not provided.

Abstract: A binder resin for sliding resistors contains an acetylene-terminated polyamic acid oligomer represented by the following general formula (I): wherein n is an integer of zero or more.

Abstract: A binder resin for sliding resistors contains an acetylene-terminated polyamic acid oligomer represented by the following general formula (I): wherein n is an integer of zero or more.

Abstract: The present invention provides a sliding contact member including a contact element, wherein the contact element includes a bundle of carbon fibers formed by bundling a plurality of carbon fibers and lubricant contained among the plurality of carbon fibers of the bundle of carbon fibers, and at least part of the bundle of carbon fibers is capable of a sliding movement with respect to tracks of a conductive pattern.

Abstract: A sliding-type electric component includes a contact element. The contact element including a bundle of carbon fibers, and a sliding portion formed on the side portion thereof. The sliding portion being capable of linear contact or surface contact with a track of a conductive pattern.

Abstract: The present invention provides a sliding contact member including a contact element, wherein the contact element includes a bundle of carbon fibers formed by bundling a plurality of carbon fibers and lubricant contained among the plurality of carbon fibers of the bundle of carbon fibers, and at least part of the bundle of carbon fibers is capable of a sliding movement with respect to tracks of a conductive pattern.

Abstract: A resistor is provided that is made by laminating at least two resistive layers, where these resistors have conductive particles held in a binder resin. The resistors are laminated such that a top resistor covers a bottom resistor, and a surface of the top resistor is exposed. The resistivity of the top resistor is made smaller than that of the bottom resistor. The top resistor contains carbon fiber and carbon black, where the central particle size of the carbon fiber ranges from 3.5 to 9.0 &mgr;m. The resistor has excellent durability and micro-linearity characteristics. The resistor may also be used as a variable resistor.

Abstract: The invention provides a resistor excellent in micro-linearity and further, the durability to sliding as well as a high-precision variable resistor using the resistor and having a long life. A lower layer and an upper layer of the resistor are laminated, the surface of a resistor on which a slider is slid is formed of the upper layer and resistivity of the upper layer is smaller than that of the lower layer.

Abstract: A variable resistor uses a carbon fiber-base resistor with a specific distribution of carbon particle sizes. Because the particle size distribution of carbon fiber is approximately equal to the normal distribution and 80% by volume or more carbon fiber is included in the particle size range from 1 to 20 &mgr;m, high conductivity in the fiber length direction of carbon fiber that is served as structural material for improving the wear resistance does not affect the micro-linearity.