Pioneer Electronic Corporation

Pioneer Video Corporation

Kazumi Kuriyama

Kazuhiko Nagata

Chiharu Koshio

Yutaka Takasu

Shigeru Kono

Takashi Kashiwazaki

Yoshiyuki Takizawa

Hiroyuki Kosaka

Goroku Kitta

Koji Shimoda

Kazunori Ohmori

A spin-coating device comprises; a turntable for concentrically supporting a substrate; a spindle motor for rotating the turntable about a central axis thereof and connected via a rotating shaft thereto; a supply mechanism for feeding and dripping a fluid coating material onto the substrate; and a holding mechanism for maintaining that the central axis of rotation of the turntable carrying the substrate is placed to be inclined at a predetermined angle with respect to a gravitational direction while the fluid coating material is dripped onto the rotating substrate.

Spin-coating device

A fluid supplying and processing device has a plurality of fluid guide pipes having distal ends opening above a workpiece such as a disc base. The open ends of the fluid guide pipes discharge respective different processing fluids supplied from respective fluid sources toward the workpiece for thereby processing the workpiece, such as to form a photoresist pattern on the surface of the disc base. At least one of the fluid guide pipes has at least a distal end portion inserted in another of the fluid guide pipes. The outer side surface of the distal end portion of said one fluid guide pipe is cleaned by a fluid flowing through the other surrounding fluid guide pipe.

Fluid supplying and processing device

A flow processing system for processing disc-shaped articles such as discs to be used to produce video or audio disc masters, whereby a plurality of processing units for performing respectively different processing operations are combined into a single system in which each disc is moved only horizontally and in a continuously rotating condition, both during processing and while being moved between the processing units. In addition, the supporting structure of the processing units is implemented such as to produce no disturbances in a horizontally directed dust-excluding flow of air, to ensure maximum prevention of adherence of dust particles to the disc surfaces.

Flow processing system

An apparatus for drying optical disks heats a disk from the underside, and optionally blows clean air between the heater and the disk being dried in order to prevent contaminants from landing on the disk. Heat control is provided such that a surface temperature of the disk during drying is maintained uniform, preventing brittleness. The apparatus preheats the heater, placing the disk in a standby position during warm-up. The apparatus then moves the disk over the heater, and monitors the temperature of the disk, removing the disk back to the standby position when the disk reaches a predetermined temperature. In order to provide uniform heating, a radiant heat controlling plate having a suitably-shaped opening portion may be provided. Additionally, temperature distribution throughout the disk may be achieved as desired, in accordance with the heat control performed, and/or in accordance with the shape of the opening portion of the radiant heat controlling plate.

Master optical disk heat-drying apparatus

An apparatus for detecting faults on the surface of a resist master disc and for measuring the thickness of the resist coating layer includes a single light source for generating a laser beam for inspection of the master disc, a first separator for separating the laser beam into a first laser beam which is used for the detection of faults, and a second laser beam which is used to measure the thickness of the resist coating layer. The second laser beam is further separated into two laser beams one of which is irradiated on the surface of the resist coated master disc at a given angle of incidence. The detection of faults on the surface of the master disc is performed by detecting a level change of the quantity of reflection light of the first laser beam from the resist master disc, and the measurement of the thickness of the resist layer is performed by using a ratio between quantities of two laser beams obtained from the second laser beam one of which is detected after being reflected by the surface of the resist master disc.

Apparatus for detecting faults on the surface of a resist master disc

A support structure for an electromechanical transducer assembly including an optical unit and drive means for driving the optical unit in at least two directions consisting of a first direction and a second direction perpendicular to the first direction, comprising stationary structure means, movable structure means movable in the two directions from and to a predetermined position with respect to the stationary structure means, the optical unit being movable with the movable structure means, and at least two spring elements each constituted by an endless band of an elastic or viscoelastic material, each of the spring elements being interposed between the stationary and movable structure means and having a center axis in a third direction perpendicular to both of the first and second directions, each of the spring elements being deformed under compression into a generally oval configuration between the stationary and movable structure means.

Support structure for electromechanical transducer

A device for detecting non-recorded portions on a magnetic tape including a circuit for preventing malfunctions in the detecting device. The output from a playback head of a tape recorder is amplified then passed through a malfunction preventing circuit which passes the signal if its amplitude is above a preset level for at least a predetermined period of time. The output signal from the malfunction preventing circuit is waveform shaped then rectified and passed through a charge/discharge circuit to a solenoid energizing circuit. The malfunction preventing circuit includes a variable impedance element such as a field effect transistor coupled between an output terminal of the circuit and ground with the impedance of the element varied in accordance with the magnitude of the input signal with a delay added. The waveform shaping circuit, the rectifying circuit and the charge/discharge circuit convert the output of the malfunction preventing circuit into a switching waveform used to control a solenoid which sets the tape speed of the tape recorder such that the tape is run fast when no signal is present on the tape.

Growing community of inventors

Yamanashi, Japan

Kazumi Kuriyama