STAGE FOR SUBSTRATE, USING METHOD OF DIRECT-ACTING MOTOR, AND POSITIONING JIG

PROBLEM TO BE SOLVED: To prevent the shaft portion of a direct-acting motor from contacting with its moving portion, and perform by the direct-acting motor the movement of a table or an optical unit accurately at a high speed. SOLUTION: The direct-acting motor has a shaft portion 14a including insid...

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Bibliographische Detailangaben
Hauptverfasser:	KUMAZAWA YUTAKA, HAYANO AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BEARINGS BLASTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS FREQUENCY-CHANGING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MEASURING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS ROTARY BODIES OTHER THAN GEARING ELEMENTS SEMICONDUCTOR DEVICES SHAFTS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent the shaft portion of a direct-acting motor from contacting with its moving portion, and perform by the direct-acting motor the movement of a table or an optical unit accurately at a high speed. SOLUTION: The direct-acting motor has a shaft portion 14a including inside a cylindrical magnet, and has a moving portion 14b including inside a coil surrounding the shaft portion 14a whose inner diameter is larger than the outer diameter of the shaft portion 14a. Contact preventing mechanisms are so attached to both the ends of the moving portion 14b as to prevent the shaft portion 14a from contacting with the moving portion 14b when the shaft portion 14a vibrates. Each contact preventing mechanism has a plurality of rollers 31, a plurality of roller holding members 32 for holding in a rotatable way the respective rollers 31, and a roller attaching member 33 provided with a plurality of guiding grooves 33a for guiding the respective roller holding members. Hereupon, each roller holding member 32 is so positioned in each guiding groove 33a of the roller attaching member 33 as to interpose the surface of the each roller 31 between the outer diameter of the shaft portion 14a and the inner diameter of the moving portion 14b. COPYRIGHT: (C)2008,JPO&INPIT