摘要:
A method for the high-precision measurement of coordinates of at least one structure on a substrate. A stage traversable in X/Y coordinate directions is provided, which is placed in an interferometric-optical measuring system. The structure on the substrate is imaged on at least one detector (34) via a measuring objective (21) having its optical axis (20) aligned in the Z coordinate direction. The structure is imaged with the so-called Dual Scan. Systematic errors can thereby be eliminated.
摘要:
The invention is based on a method and an apparatus for scanning a semiconductor wafer (1), on-the-fly images of regions on the wafer being acquired using a camera (3). Upon a scan line changeover, a continuously curved displacement track is generated by at least partial superimposition of the relative motions between the wafer (1) and camera (3) in the direction of the scan lines and perpendicular thereto. As a result, time is saved and wafer throughput is increased.
摘要:
An apparatus for inspecting a surface of a wafer includes an illumination device for illuminating an imaging area of the wafer with at least one broad-band spectrum, and an optical imaging device with a detector for polychromatic imaging of the imaging area of the wafer based on the illumination, wherein the imaging device includes a filter arrangement for selecting a plurality of narrow-band spectra. In addition, a method for inspecting the surface of a wafer, includes the steps of leveling a plurality of narrow-band spectra to a common intensity range, illuminating an imaging area of the wafer with at least one broad-band spectrum, and imaging a plurality of narrow-band spectra from the imaging area based on the illumination.
摘要:
The present invention relates to a method of optically imaging a wafer with a photoresist layer, wherein an imaging area on the surface of the wafer is illuminated with light and a fluorescence image is taken in the imaging area based on the fluorescent light irradiated due to the illumination by the excitation light.
摘要:
A measuring apparatus for determining relative positions of a positioning stage arranged in a moveable fashion in at least one direction by a predeterminable maximum traversing path. The measuring device comprises at least one interferometric measuring means and at least one interferometric correction means. An interferometric measuring means is operable with the laser light of a laser of at least one wavelength. Correction results can be generated with the interferometric correction means allowing conclusions to be drawn with respect to the actual wavelength of the laser light during a position determination of the positioning stage in order to take into account variations of the wavelength of the laser light, in particular due to ambient conditions, when evaluating the measuring results. The interferometric correction means is arranged proximate to the interferometric measuring means, and the proximity corresponds to a predeterminable portion of the maximum traversing path of the positioning stage.
摘要:
The present invention relates to a method of inspecting a wafer, wherein the wafer has a first area of periodically arranged SAWs and at least one second area of SAWs displaced with respect to the first area. The method comprises the steps of optically imaging the first area of the wafer by moving an imaging window in the period direction, displacing the imaging window relative to the wafer, optically imaging the second area of the wafer by moving the displaced imaging window in the period direction, and evaluating the image by comparing partial images.
摘要:
A device for determining the position of a structure on an object in relation to a coordinate system is disclosed. The object is placed on a measuring table which is movable in one plane, wherein a block defines the plane. At least one optical arrangement is provided for transmitted light illumination and/or reflected light illumination. The optical arrangement comprises an illumination apparatus for reflected light illumination and/or transmitted light illumination and at least one first or second optical element, wherein at least part of the at least one optical element extends into the space between the block and an optical system support. At least one encapsulation is provided, encapsulating at least one optical component of at least one optical arrangement and/or at least one optical element.
摘要:
An illumination mean for the inspection of flat substrates is disclosed. The flat substrate includes an upper edge area, a lower edge area and a front area. The illumination means is formed as an annular segment and comprises an opening into which at least the edge area of the flat substrate extends. A plurality of light sources are arranged on an annular segment in a housing. Inside the housing, a reflective element is provided so that the light from the light sources does not impinge perpendicularly on the upper edge area, the lower edge area and the front area of the flat substrate.
摘要:
An advancing means for a multi-coordinate measurement table including a drive unit having a friction rod and a motor for each coordinate axis (x, y). The motor contacts one side of the friction rod with its motor shaft and at least one press roller contacts the other side of the friction rod. At least one pressing means is provided biasing the press roller, the friction rod and the motor shaft against each other with a pressing force, whereby the motor shaft frictionally engages the friction rod and converts the rotational movement of the motor into a linear movement of the friction rod. A method for controlling such an advancing means is disclosed as well.
摘要:
A method for reproducibly determining object characteristics is disclosed. Herein an object is imaged onto a detector by means of an imaging optics and detected thereon. A correction function k is applied to a brightness measuring result N originally detected by a detector in such a way, that a corrected brightness measuring result N′ is proportional to a brightness I impinging on the detector.