A disk drive apparatus reproduces a signal from a disk and/or records an signal on the disk. A position detecting part produces a position signal in response to a rotation of a rotor. An activation operation block controls active operation of first and second power amplifying parts in response to the position signal. A signal producing part produces a slope signal which repeats a slope waveform a plural times during one period of the position signal. The shaping part produces first and second ac...

A biosensor is provided with an area in which a reagent having bleaching action is carried in a state where it can be dissolved, at least in a part of a sample application area to which an inspection target solution is applied or the downstream of the sample application area in the direction of the inspection target solution permeating, in a development layer. In the so-constituted biosensor, a colored component in the inspection target solution can be faded by the bleaching reagent, so that the...

A probe card for a wafer level test of electrical characteristics of a plurality of semiconductor integrated circuit devices formed on a semiconductor wafer. The card has a thin film with bumps on which a plurality of bumps to be respectively brought into contact with all of inspection electrodes of the semiconductor integrated circuit devices are formed, and which is held on a rigid ceramic ring. An alignment mark constituted by a bump formed simultaneously with the bumps for contact is added t...

A substrate for use in crystallization has a base member, and an organic molecular film on a surface of the base member. The organic molecular film has non-affinity to a liquid, and the surface of the base member and the organic molecular film are covalently bound to each other. The substrate formed with the organic molecular film having non-affinity to the liquid on the surface of the base member is produced by contacting the surface of the base member having an active hydrogen atom or the surf...

A three-dimensional-optical waveguide is formed by laminating planar substrates such as a plurality of lens substrates and, an isolator substrate and a wavelength division multiplexing filter, the optical substrates at least include a waveguide substrate having a waveguide and a reflecting surface. In the three-dimensional optical waveguide, the planar substrates are positioned by markers integrally formed on at least two of the planar substrates. Light directed into the waveguide is reflected b...

A playback unit (3) reproduces contents which are recorded on a video cassette tape (2), and a recording unit (6) records the contents on another video cassette tape (7) and, simultaneously, an erasing unit (5) erases the contents from the video cassette tape (2).Thereby, the copy-inhibited contents recorded on the video cassette tape (2) can be transferred to the other video cassette tape (7) without copying the contents.

With commands from a terminal divided into a command to designate an access area and a command to gain access, the terminal adds verification data of the terminal to an argument of the command to gain access, and it is thereby possible to verify the identity of a terminal application that issues the command to designate an access area, a terminal application that issues the command to gain access, and a terminal application that holds a verification key.

An antiallergen filter of the present invention is characterized in that a water-insoluble high-molecular weight anti-allergenic agent having a phenolic hydroxyl group and a moisture-absorbing material are carried on a filter. Because of using the water-insoluble high-molecular weight substance as an anti-allergenic agent, the antiallergen filter of the present invention is free from a problem that the anti-allergenic agent flows and drops or is detached from the filter due to moisture in the at...

An electronically commutated motor and control means therefor. The electronically commutated motor has no dead zone and no overlap despite an imperfect position detecting signal. The transition of the commutation is carried out in a differential manner. Any fluctuation in the operating temperature and/or deviation of the supply voltage does not disturb the commutation. The generating torque of the motor is easily controlled by a small power without using any additional power control means. A con...

A converter for changing alternating current into direct current by charging a large-capacity capacitor through a full wave rectification circuit which, together with a transformer, is connected to an AC power supply. The output voltage of a voltage divider circuit consisting of the above-mentioned capacitor and a parallel-connected resistor is compared with a predetermined reference voltage by a comparator circuit. Then, if the former is lower than the latter, a gate circuit is triggered to put...