摘要:
Element for homogenizing the illumination with simultaneous setting of the polarization degree, wherein the element consists of at least two components. The first component is a microlens array, and the second component is a filter for setting the desired polarization.
摘要:
A method for determining the lateral correction as a function of the substrate topology and/or the geometry of the substrate holder is disclosed. The substrate is placed on a measuring stage traversable in the X coordinate direction and Y coordinate direction, which carries the substrate to be measured. The substrate is supported on at least three support points which define a plane. An apparatus is provided for determining the position of a plurality of positions on the surface of the substrate in the in the X, Y and Z coordinate directions. The substrate is tiltable about an axis parallel to the X/Y plane, to enable the substrate to be measured in a tilted position.
摘要:
A device for measuring or inspecting substrates of the semiconductor industry, including a base frame and a module detachably mounted thereon via a module frame, wherein the module frame is detachably connected to the base frame via at least two self-aligning coupling elements and at least one alignment element, wherein the base frame and the module frame are in exactly defined spatial alignment with each other, when the module frame is detachably connected to the base frame.
摘要:
A method is disclosed which is suitable for the calibration of a measuring table (20) of a coordinate measuring machine (1). For this purpose, a mask (2) is deposited in a three-point support of the measuring table (20), wherein the mask (2) used for the calibration of the measuring table (20) is a mask (2), which is used for the semiconductor production. The measurement of positions of a plurality of different structures (3) which are arranged in a distributed manner on the mask (2) is carried out. The structures (3) are available in an initial orientation on the mask (2). The mask (2) is rotated and the position of the structures (3) is determined in the rotated orientation. Afterwards, the mask (2) is shifted and the position of the structures (3) is also determined. A total correction function for eliminating coordinate-dependant measuring errors is determined, wherein the total correction function has a first correction function and a second correction function.
摘要:
A method of determining defects in a plurality of images having essentially the same image contents is disclosed. A comparison operation is carried out once three fully comparable images having essentially the same image contents are present in the intermediate memory. The stored individual images are accessed randomly. A paired comparison operation between the three difference images is carried out.
摘要:
An interferometric device for position measurement of an element moveable in a plane is disclosed. A laser light source measures the position of the moveable element and emits the required measuring light. A beam splitter splits the measuring light into a first partial beam path and a second partial beam path, which each impinge on a reflecting surface of the moveable element via an interferometer. Herein, at least the beam splitter, which splits the measuring light into a first partial beam path and a second partial beam path, and the beam splitter, which directs the third partial beam path onto an etalon via an interferometer, have a respective beam trap associated with them, which traps the light returning from the respective interferometers.
摘要:
A method for allocating correction values of the degree of bending of a substrate (2) relative to a coordinate system (40) of a coordinate measuring machine (1) is disclosed. The positions of the at least two reference marks (32) on the substrate holder (27) are automatically determined relative to the coordinate system (40) of the coordinate measuring machine (1) for each substrate (2) currently placed in the substrate holder (27) in the coordinate measuring machine (1).
摘要:
A device for measuring or inspecting substrates of the semiconductor industry, including a base frame and a module detachably mounted thereon via a module frame, wherein the module frame is detachably connected to the base frame via at least two self-aligning coupling elements and at least one alignment element, wherein the base frame and the module frame are in exactly defined spatial alignment with each other, when the module frame is detachably connected to the base frame.
摘要:
A method for determining the focal position of at least two edges of structures (31) on a substrate (30) is disclosed. During the movement of a measurement objective (21) in the Z-coordinate direction, a plurality of images of the at least one structure (31) is acquired with at least one measurement window (45) of a detector. An intensity profile of the structure (31) is determined for each image.
摘要:
A method for processing the image data of the surface of a wafer (2) recorded by at least one camera (5) is disclosed, wherein an image field (15) is defined for each camera (5) in such a way that the recorded image content is repeated after N recorded images. In an evaluation electronics (18) M utility programs (19) are determined, wherein M is equal to the number of recorded images after which the image content is repeated. The number M of utility programs (19) is adapted to the number N of images. Each of the M utility programs (19) of the plurality of recorded images is only fed with images having the same image contents in order to detect defects on the basis of the image contents of the images of the surface of the wafer. The results of the M utility programs (19) are respectively forwarded to a central program (20) in a sequential manner, which compiles a distribution of the defects present on the surface of the wafer (2) from the individual results of the M utility programs (19).