摘要:
A pattern formed on a substrate includes first and second sub-patterns positioned adjacent one another and having respective first and second periodicities. The pattern is observed to obtain a combined signal which includes a beat component having a third periodicity at a frequency lower than that of the first and second periodicities. A measurement of performance of the lithographic process is determined by reference to a phase of the beat component. Depending how the sub-patterns are formed, the performance parameter might be critical dimension (CD) or overlay, for example. For CD measurement, one of the sub-patterns may comprise marks each having of a portion sub-divided by product-like features. The measurement can be made using an existing alignment sensor of a lithographic apparatus. Sensitivity and accuracy of the measurement can be adjusted by selection of the first and second periodicities, and hence the third periodicity.
摘要:
An alignment measurement system measures an alignment target on an object. A measurement illuminates the target and is reflected. The reflected measurement beam is split and its parts are differently polarized. A detector receives the reflected measurement beam. A processing unit determines alignment on the basis of the measurement beam received by the detector. An alternative arrangement utilizes an optical dispersive fiber to guide a multi-wavelength measurement beam reflected from the object to a detector.
摘要:
A substrate table is provided with an optical system that includes a first window and a second window arranged to allow radiation to pass into an optical arm. At least two mirrors are provided within the optical arm and are arranged to reflect radiation that is passed through the windows. At least two lenses are positioned to receive radiation reflected from the mirrors, wherein the first window is provided with a first alignment mark and the at least two mirrors and at least two lenses are arranged to form an image of the first alignment mark at the second window. A second alignment mark is provided in the second window, or in the substrate table at a location adjacent to the second window.
摘要:
A substrate bonding system has a first and a second substrate table for holding a first substrate and a second substrate, respectively, and a controller. The first substrate includes a first device having first contact pads and the second substrate a second device having second contact pads. The wafer bonding system is arranged to bond the first and second device in such a way that a circuit may be formed by the first and second device. The first and second substrate tables each include a position sensor arranged to measure an optical signal generated on an alignment marker of the first and second substrate, respectively. The first and second substrate tables include a first and second actuator respectively that is arranged to alter a position and orientation of the respective substrate table.
摘要:
A lithographic apparatus according to one embodiment of the invention includes an alignment system for aligning a substrate or a reticle. The alignment system includes a radiation source configured to illuminate an alignment mark on the substrate or on the reticle, the alignment mark comprising a maximum length sequence or a multi periodic coarse alignment mark. An alignment signal produced from the alignment mark is detected by a detection system. A processor determines an alignment position of the substrate or the reticle based on the alignment signal.
摘要:
A lithographic alignment apparatus includes a radiation source arranged to generate radiation at a wavelength of 1000 nanometers or longer, and a plurality of non-imaging detectors arranged to detect the radiation after the radiation has been reflected by an alignment mark.
摘要:
An alignment apparatus for a substrate bonding system is provided with a first optical arm arranged to direct onto a detector radiation from a first alignment mark on a first substrate, and a second optical arm arranged to direct onto the detector radiation from a second alignment mark on a second substrate. The first alignment mark has a known location relative to a functional pattern provided on an opposite side of the first substrate, and the second alignment mark has a known location relative to a functional pattern provided on an opposite side of the second substrate. The substrate bonding system can be further provided with first and second substrate tables arranged to hold the first and second substrates such that they face one another, at least one of the substrate tables being movable in response to a signal output from the detector, thereby allowing the first and second substrates to be aligned with respect to each other for bonding.
摘要:
A method for manufacturing a device includes providing a substrate, the substrate including a plurality of exposure fields, each exposure field including one or more target portions and at least one mark structure, the mark structure being arranged as positional mark for the exposure field; scanning and measuring the mark of each exposure field to obtain alignment information for the respective exposure field; determining an absolute position of each exposure field from the alignment information for the respective exposure field; determining a relative position of each exposure field with respect to at least one other exposure field by use of additional information on the relative parameters of the exposure field and the at least one other exposure field relative to each other; and combining the absolute positions and the determined relative positions into improved absolute positions for each of the plurality of exposure fields.
摘要:
A lithographic apparatus according to one embodiment of the invention includes an alignment system for aligning a substrate or a reticle. The alignment system includes a radiation source configured to illuminate an alignment mark on the substrate or on the reticle, the alignment mark comprising a maximum length sequence or a multi periodic coarse alignment mark. An alignment signal produced from the alignment mark is detected by a detection system. A processor determines an alignment position of the substrate or the reticle based on the alignment signal.
摘要:
An alignment mark comprising a periodic structure formed by mark lines is described. In an embodiment, the alignment mark is formed in a scribe lane of a substrate, the scribe lane extending in a scribe lane direction. The alignment mark includes: a first area including a first periodic structure formed by first mark lines extending in a first direction, the first direction being at a first angle α with respect to the scribe lane direction: 0°