Abstract:
Liquid (Lq) is held between a tip lens (42) of a projection optical system and a wafer (W) on a wafer stage, using a nozzle member (32) which has a shape enclosing an optical path of an illumination light (IL), and a bottom surface to which the wafer is placed facing via a predetermined clearance that has an annular recess section (32n, 32h) formed having multiple projecting sections (32b1, 32b2, 32d). This prevents adhesion of contamination and liquid from remaining that become factors of defects of a pattern formed on the wafer. The nozzle member preferably has an annular shaped inclined surface(32c) whose gap with the wafer surface becomes smaller from the inner side to the outer side, formed on an inner bottom surface facing the wafer of an outer recess section (32h) formed on the bottom surface of the nozzle member.
Abstract:
In measurement of a positional information in the XY plane of a fine movement stage (WFS) held by a coarse movement stage(WCS), an encoder system is used including a head which is placed facing a grating (RG) placed on a surface substantially parallel to the XY plane of the fine movement stage and irradiates a measurement beam on the grating. Then, the fine movement stage is driven individually or integrally with the coarse movement stage by a drive system, based on the positional information measured by the encoder system. In this case, the head of the encoder system can be placed in proximity to the fine movement stage (the grating), which allows a highly precise measurement of the positional information of the fine movement stage by the encoder system.
Abstract:
A pattern forming method includes coating, on a wafer W, a negative resist 3 and a positive resist 4 which has a higher sensitivity; exposing the positive resist 4 and the negative resist 3 on the wafer W with an image of a line-and-space pattern; and developing the positive resist 4 and the negative resist 3 in a direction parallel to a normal line of a surface of the wafer W. A fine pattern, which exceeds the resolution limit of an exposure apparatus, can be formed by using the lithography process without performing the overlay exposure.
Abstract:
An exposure method includes measuring coordinates of alignment marks before and after exposing a first wafer to determine a fluctuation amount ?pi of a parameter of the alignment (Steps 201, 204, 205); measuring coordinates of alignment marks before exposing a second wafer to determine a parameter pi of the alignment (Step 207); and aligning and exposing the second wafer (Step 209) based on a parameter pi' obtained by correcting the parameter pi with the fluctuation amount ?pi determined for the first wafer (Step 208). A high overlay accuracy can be obtained even when the alignment information is gradually changed, for example, due to the linear expansion and contraction of the substrate during the exposure of the substrate.
Abstract:
A carrier apparatus positions a chuck member (108) above a wafer (W) mounted on a fine movement stage (WFS2), relatively moves the chuck member (108) and the fine movement stage(WFS2) in a vertical direction, makes the chuck member (108) approach a position which is a predetermined distance away from the upper surface of the wafer (W), makes the chuck member(108) hold the wafer (W) from above in a non-contact manner, and makes the chuck member holding the wafer and the fine movement stage move apart within a predetermined plane after making the chuck member holding the wafer and the fine movement stage move apart in the vertical direction. Further, the carrier apparatus loads the wafer (W) held in a non-contact manner from above by the chuck member on the fine movement stage. Therefore, it is not necessary to form or provide a notch to house an arm and the like used in the wafer exchange on a holding member such as a wafer holder on the fine movement stage, and a vertical movement member used in the delivery of the wafer, in the holding member.
Abstract:
A stage assembly (1 0) that moves a device (38) includes a stage mover (1 6) that moves the stage (14) along a first axis and along a second axis. The stage mover (16) includes a magnet assembly (20), and a conductor assembly (22). The conductor assembly (22) includes a plurality of first axis conductor units (24) and a plurality of second axis conductor units (26). The magnet assembly (20) includes a first axis magnet array (28A) and a second axis magnet array (30A). The first axis conductor units (24) are arranged in an alternating fashion with the second axis conductor units (26) along the first axis and along the second axis. The performance of the stage mover (16) can be different in the first and second axes. Either the conductor units (24) (26) and/or the magnet arrays (28A) (30A) can have a different geometry in the first and second axes.
Abstract:
A carrier apparatus positions a chuck member (108) above a wafer (W) mounted on a fine movement stage (WFS2), relatively moves the chuck member (108) and the fine movement stage(WFS2) in a vertical direction, makes the chuck member (108) approach a position which is a predetermined distance away from the upper surface of the wafer (W), makes the chuck member(108) hold the wafer (W) from above in a non-contact manner, and makes the chuck member holding the wafer and the fine movement stage move apart within a predetermined plane after making the chuck member holding the wafer and the fine movement stage move apart in the vertical direction. Further, the carrier apparatus loads the wafer (W) held in a non-contact manner from above by the chuck member on the fine movement stage. Therefore, it is not necessary to form or provide a notch to house an arm and the like used in the wafer exchange on a holding member such as a wafer holder on the fine movement stage, and a vertical movement member used in the delivery of the wafer, in the holding member.
Abstract:
A stage is driven (position control) using a hybrid signal (FHY) which is obtained by synthesizing an output signal (FIY) of an interferometer (16) (an interferometer system (118)) and an output signal (FEY) of an encoder (70A) (an encoder system (150)) that are made to pass through a high pass filter (Hfc) and a low pass filter (Lfc), respectively. A cutoff frequency (fc) is set to a frequency corresponding to a speed slightly smaller than the speed of the stage at the time of scanning exposure. This allows the stage to be driven using the interferometer whose linear measurement is high at the time of scanning exposure, and using the encoder whose measurement reproducibility is high at the time of stepping.
Abstract:
While an exposure processing is performed to a wafer (W) held by a fine movement stage (WFS1) supported by a coarse movement stage (WCS1) in an exposure station (200), at least a part of a measurement processing to a wafer (W) held by a fine movement stage (WFS2) supported by a coarse movement stage (WCS2) and an exchange of a wafer (W) held by a fine movement stage (WFS3) on a center table (130) is concurrently performed. Because of this, exposure with a higher throughput becomes possible, even when compared with a conventional exposure apparatus which concurrently performs an exposure processing to a wafer on a wafer stage, and processing such as wafer exchange and alignment on another stage.
Abstract:
Electric power is generated by using a generator (38) equipped with: a coil unit (38A) that is arranged on a barrel platform (50) and incorporates coils(39); and a magnet unit (38B) that has a magnet section (44) arranged on a protruding section (33a) of a column (30) separated from the barrel platform (50) in terms of vibration and generates an electromotive force in a non-contact state with the coils (39), and a motor (43) that drives the magnet section, and thus a wiring that supplies electric power to the barrel platform (50) does not have to be used. Accordingly, vibration that has been propagated to the barrel platform through the wiring can be precluded.