摘要:
A planar motor device and the like which can shift at a high acceleration, provide a high aligning accuracy and can be efficiently driven is provided. The planar motor (15) includes a fixed part (16) provided on a base member (14), and a moving part (17) provided on a stage unit (WST1). The fixed part (16) is provided with core members (22), which are arranged at prescribed intervals within an XY plane with a coil (21) wound around, and leading edge parts of head parts (22a) of the core members (22) are set to be within a substantially one plane. On the bottom plane of a first stage (25) of the stage unit (WST1), permanent magnets (26) are arranged at prescribed intervals in an X direction and a Y direction.
摘要:
A serial communication device bridging between a parallel bus and a serial bus, includes (a) a check bit producer which applies an error correcting code to parallel data transmitted through the parallel bus, (b) a parallel-serial converter which converts the parallel data output from the check bit producer, into serial data, (c) a serial-parallel converter which converts serial data transmitted through the serial bus, into parallel data, and (d) an error detector which checks an error correcting code applied to the serial data, and detects an error in the error correcting code.
摘要:
An exposure apparatus is an exposure apparatus that exposes a substrate by filling a liquid between a projection optical system and the substrate, and projecting a pattern image onto the substrate via the projection optical system and the liquid, wherein the projection optical system has a first group comprising an optical member that contacts the liquid, and a second group that differs from that first group; the first group is supported by a first support member; and the second group is separated from the first group and is supported by the second support member that differs from the first support member.
摘要:
An actuator has a pair of electromagnets and a curved magnetic member that is magnetically coupled to the electromagnets. The magnetic force acting on the curved magnetic member has less of a tendency to induce torque to the table than a straight magnetic member, because the geometry of the magnetic force between the curved magnetic member and electromagnets remain relatively unchanged over the permitted range of movement of the magnetic member.
摘要:
A high accuracy stage supported in six degrees of freedom by electromagnetic bearings. Movements in the horizontal plane of the stage are controlled by variable reluctance actuators which are mounted between the high accuracy stage and a coarse stage so as not to distort the high accuracy stage during movements thereof. The high accuracy stage is supported in three vertical degrees of freedom by electromagnetic actuators disposed between the coarse stage and the high accuracy stage and aided by a supplemental vertical support disposed adjacent to the actuators. Preferably, the high accuracy stage is suspended from a bar supported by the supplemental vertical support, which is preferably air bellows.
摘要:
A system for detecting yawing of an article movable in first and second orthogonal directions along a plane includes a first yawing detecting device for detecting any angular change of a first surface of the article opposed to the first yawing detecting device, during movement of the article in the first direction; and a second yawing detecting device for detecting any angular change of a second surface of the article different from the first surface and opposed to the second yawing detecting device, during movement of the article in the second direction.
摘要:
A powder coating composition includes one or more crystalline substances the lowest melting point of which is Mp and one or more non-crystalline substances the lowest glass transition point of which is Tg and is lower than Mp, wherein the crystalline and non-crystalline substances are selected from epoxy resins and curing agents and bonded to each other. The bonding is effected by maintaining a powdery mixture containing the crystalline and non-crystalline substances at a temperature higher than Tg but lower than Mp and the softening point of any of the the non-crystalline substances, optionally under a pressure, and cooling and pulverizing the resulting mixture.
摘要:
A powder coating composition is disclosed which includes a particulate material containing an epoxy resin and a curing agent, and fine powder of a charge controlling agent such as an acrylic resin, silica or a mixture thereof. The charge controlling agent is deposited on surfaces of the particles of the particulate material.
摘要:
In a movement guiding device, two parallel stationary guides are fixed to a surface plate and plural hydrostatic gas or bearing members are provided for the surface plate and the stationary guides. A Y stage is moved in a Y-axis direction under the influence of these bearing members. Additional hydrostatic gas or air bearing members are provided in relation to the surface plate and the Y stage so as to support an X stage for movement in an X-axis direction orthogonal to the Y-axis direction. Guide of the Y stage in the X-axis direction is made by the stationary guides on the surface plate, while guide thereof in a Z-axis direction perpendicular to an X-Y plane is made by the surface plate. Guide of the X stage in the Y-axis direction is made by the Y stage, while the guide thereof in the Z-axis direction is made by the surface plate, similar to the Y stage. With such structure, any vibration, rolling, or otherwise, of the Y stage is not transmitted to the X stage. Thus, high-precision guide is attainable. Linear motors are used as drive sources for the X and Y stages, so that all movable portions are provided by non-contact structures. Further, suitable brake members are used, which members are operable at a time of an accident of the stage. By this, accidental collision of the stage and/or derailment of the stage from the guide can be prevented.
摘要:
A thermosetting, powder coating composition is disclosed which comprises an epoxy resin, a nitrogen-containing curing agent and an inorganic filler consisting essentially of aluminum hydroxide and silica, the weight ratio of the aluminum hydroxide to the silica being 1:4 to 4:1 and the filler being used in an amount of 40-300 parts by weight per 100 parts by weight of the epoxy resin.