Abstract: There has been a problem that a mode (a high-order mode) different from a basic propagation mode occurs at a point of a through conductor and a transmission characteristic deteriorates greatly. The present invention is a high-frequency wiring board wherein L>&lgr;/4 and &pgr;(A+B)≦&lgr; are satisfied in which L is a length of a through conductor, A is a diameter of the through conductor, B is shortest distances between the through conductor and a plurality of ground through conductors, &pgr; is a circle ratio and &lgr; is an effective wavelength of a high-frequency signal transmitted by the through conductor. It is possible to inhibit a high-order mode which occurs at a point of the through conductor.

Abstract: The invention is a mounting structure of a high-frequency wiring board in which when a pitch between a conductive connecting member connected to a high-frequency signal electrode pad of a high-frequency wiring board and a conductive connecting member connected to a ground electrode pad adjacent thereto is denoted by A and a maximum diameter of these conductive connecting members in sections parallel to the lower face of the high-frequency wiring board is denoted by B, A/B≧2 is satisfied, and a space L1 between the lower face of the high-frequency wiring board and the upper face of the external electric circuit board is one sixteenth or less of a wavelength of high-frequency signals processed by a high-frequency semiconductor element.

Abstract: There has been a problem that a mode (a high-order mode) different from a basic propagation mode occurs at a point of a through conductor and a transmission characteristic deteriorates greatly. The present invention is a high-frequency wiring board wherein L>&lgr;/4 and &pgr;(A+B)≦&lgr; are satisfied in which L is a length of a through conductor, A is a diameter of the through conductor, B is shortest distances between the through conductor and a plurality of ground through conductors, &pgr; is a circle ratio and &lgr; is an effective wavelength of a high-frequency signal transmitted by the through conductor. It is possible to inhibit a high-order mode which occurs at a point of the through conductor.

Abstract: A high-frequency wiring board of the present invention is characterized in that W1>W2 and S1≧S2 are satisfied in which W1 is a line width of a portion having a predetermined characteristic impedance of a line conductor, W2 is a conductor width of the line conductor in proximity to a connection of one end of the line conductor to a through conductor, S1 is an interval between the portion having the line width W1 of the line conductor and a same plane ground conductor, and S2 is an interval between the portion of the one end of the line conductor in proximity to the connection to the through conductor and the same plane ground conductor.

Abstract: The invention is a mounting structure of a high-frequency wiring board in which when a pitch between a conductive connecting member connected to a high-frequency signal electrode pad of a high-frequency wiring board and a conductive connecting member connected to a ground electrode pad adjacent thereto is denoted by A and a maximum diameter of these conductive connecting members in sections parallel to the lower face of the high-frequency wiring board is denoted by B, A/B≧2 is satisfied, and a space L1 between the lower face of the high-frequency wiring board and the upper face of the external electric circuit board is one sixteenth or less of a wavelength of high-frequency signals processed by a high-frequency semiconductor element.

Abstract: 2n (n is an integer) projections are formed per half wavelength on the driving surface of a vibration member of a disclosed vibration driven motor. The vibration member has an A driving electrode group (A1 to A8) and a B driving electrode group (B1 to B8) polarized at a &lgr;/2 pitch so as to alternately have opposing expansion/contraction polarities with respect to a wavelength &lgr; of a vibration wave to be excited, and &lgr;/4-pitch vibration detection electrodes (SA, SB) and three ground common electrodes (G), which are arranged between the A and B electrode groups. The vibration detection electrodes (SA, SB) are arranged to have substantially loop positions of standing waves generated by the corresponding A and B driving electrode groups as their centers.

Abstract: A vibration actuator including a ring-like vibration member for generating a vibration and a ring-like contact member having a contact portion which is in contact with the vibration member. The contact member and the vibration member are moved relative to each other rotated by the vibration of the vibration member. The contact member has a first portion between the contact portion and an inner portion. The thickness of the first portion is gradually reduced with respect to the contact portion and the inner portion.

Abstract: In a vibration wave motor wherein a member provided with a composite resin layer providing a contact surface with respect to a vibration member for generating a travelling vibration wave is brought into pressure contact with the vibration member, whereby the vibration member and the member pressure-contacting therewith are moved relative to each other by friction driving with the aid of the travelling vibration wave generated in the vibration member, the composite resin layer is formed of a composite resin composed of a thermosetting resin, for example, an aromatic polyimide resin, as a base material, and a friction regulating agent and, if required, a non-fiber type wear resistance improving agent blended with the base material.

Abstract: 2n (n is an integer) projections are formed per half wavelength on the driving surface of a vibration member of a disclosed vibration driven motor. The vibration member has an A driving electrode group (A.sub.1 to A.sub.8) and a B driving electrode group (B.sub.1 to B.sub.8) polarized at a .lambda./2 pitch so as to alternately have opposing expansion/contraction polarities with respect to a wavelength .lambda. of a vibration wave to be excited, and .lambda./4-pitch vibration detection electrodes (S.sub.A, S.sub.B) and three ground common electrodes (G), which are arranged between the A and B electrode groups. The vibration detection electrodes (S.sub.A, S.sub.B) are arranged to have substantially loop positions of standing waves generated by the corresponding A and B driving electrode groups as their centers.

Abstract: A vibration wave motor, in which the slidable member, constituting the rotor either solely or in combination with a support member, is formed by injection molding of a composite resin, composed of a thermoplastic resin with the glass transition point at least equal to 100.degree. C., preferably at least equal to 140.degree. C., as the matrix resin and a fibrous reinforcing material.

Abstract: A vibration wave driven motor including a vibration member having a friction contact surface and a rotor having a contact surface, which is in contact with the vibration member. The contact surface of the rotor consists of a composite resin filled and blended with a wear modifier and a friction regulator, as needed, and has a Rockwell hardness of 80 to 110. The friction surface of the vibration member is formed by a multi-layered film of a nickel intermetallic compound having a Vickers hardness of 800 to 1,200.

Abstract: A vibration wave driven motor includes a vibration member for generating a vibration wave in response to an applied signal. A contact member includes a contact element which contacts the vibration member. The vibration wave creates relative movement between the vibration member and the contact member, and the surface of the contact member is made of a non-fiber type compound resin having a Rockwell hardness of 80-110 while the vibration member is made of a stainless steel of precipitation.

Abstract: A vibration wave motor has a vibration member of an elastic material, and a sliding member comprising a composite resin having a filler formulated in a resin having a glass transition point of 100.degree. C. or higher secured onto a support comprising an elastic material with good thermal conductivity such as aluminum alloy.

Abstract: An optical scanning device has a mirror for light scanning, a motor composed of an armature and a stator, a case for supporting said stator of the motor, a torsion rod for generating a restituting force against the driving force of said motor to limit the rotating angle of said armature, and a speed detecting element. Said torsion rod is fixedly supported at one end thereof by said case and rotatably supported at the other end thereof by a bearing member. Said mirror, said armature and said speed detecting element are provided between both the supported ends of said torsion rod.