Abstract:
A diagnostic system (242, 244, 236, 248) implements a network comprising two or more sub-domains (DOM-A, B, C). Each sub-domain comprises diagnostic information extracted by analysis of object data, the first object data representing one or more first parameters measured in relation to a first set of product units that have been subjected nominally to the same industrial process as one another. The network further comprises at least one probabilistic connection (622, 624, 626) from a first variable in a first diagnostic sub-domain to a second variable in a second diagnostic sub-domain. Part of the second diagnostic information is thereby being influenced probabilistically by knowledge within the first diagnostic information. Diagnostic information may comprise for example a spatial fingerprint observed in the object data, or inferred. The network may include connections within sub- domains. The network may form a directed acyclic graph, and used for Bayesian inference operations.
Abstract:
Measurement data (902) is obtained for calibration fields that have been exposed by a lithographic apparatus using different field layouts and exposure sequences. The measurement data is classified in subset by scan direction, step direction, field size and other variables. The measurement data is indexed by a time value that varies through each exposure sequence. Time values within different exposure sequences can be related using a normalized time value (T) based on the beginning and end of each exposure sequence. An inter-field performance model (904) is calculated for each subset. An intra-field component (914) of a performance model is calculated with time as a third dimension. The time-indexed performance model is used to determine intra-field corrections for a variety of product exposures having product layouts and product exposure sequences different to the calibration fields, based on time and other a variables of the product layout and product exposure sequence. Time-based components can be inter-field and/or intra-field components.
Abstract:
Die Erfindung betrifft Verfahren und Vorrichtungen zur Charakterisierung eines durch wenigstens einen Lithographieschritt strukturierten Wafers. Gemäß einem Aspekt wird eine Mehrzahl von für den strukturierten Wafer charakteristischen Parametern auf Basis von Messungen der Intensität elektromagnetischer Strahlung nach deren Beugung an dem strukturierten Wafer ermittelt, wobei diese Intensitätsmessungen für wenigstens eine Nutzstruktur und wenigstens eine Hilfsstruktur durchgeführt werden, wobei eine Ermittlung der Parameter basierend auf bei den Intensitätsmessungen für jeweils unterschiedliche Kombinationen aus Wellenlänge, Polarisation und/oder Beugungsordnung gemessenen Intensitätswerten sowie entsprechend berechneten Intensitätswerten unter Anwendung einer mathematischen Optimierungsmethode erfolgt. Die Ermittlung der für den strukturierten Wafer charakteristischen Parameter weist folgende Schritte auf: Ermitteln von Parametern eines ersten Parametersatzes auf Basis der für die wenigstens eine Hilfsstruktur erhaltenen Intensitätswerte, und Ermitteln von Parametern eines zweiten Parametersatzes unter Berücksichtigung der ermittelten Parameter des ersten Parametersatzes.
Abstract:
The invention discloses an improved method of geometry corrections to be applied to properly transfer semiconductor designs on a wafer or a mask in nanometer scale processes. In contrast with some prior art techniques, geometry corrections and possibly dose corrections are applied before fracturing. Unlike edge based corrections, where the edges are displaced in parallel, the displacements applied to generated geometry corrections according to the invention do not preserve parallelism of the edges, which is specifically well suited for free form designs. A seed design is generated from the target design. Vertices connecting segments are placed along the seed design contour. Correction sites are placed on the segments. Displacement vectors are applied to the vertices. A simulated contour is generated and compared to the contour of the target design. The process is iterated until a match criteria between simulated and target design (or another stop criteria) is reached.
Abstract:
A clustered substrate processing system comprising one or more lithography elements, each lithography element arranged for independent exposure of substrates according to pattern data. Each lithography element comprises a plurality of lithography subsystems, a control network arranged for communication of control information between the lithography subsystems and at least one element control unit, the element control unit arranged to transmit commands to the lithography subsystems and the lithography subsystems arranged to transmit responses to the element control unit. Each lithography element also comprises a cluster front-end for interface to an operator or host system, the front-end arranged for issuing control information to the at least one element control unit to control operation of the one or more lithography subsystems for exposure of one or more wafers. The front-end is arranged for issuing a process program to the element control unit, the process program comprising a set of predefined commands and associated parameters, each command corresponding to a predefined action or sequence of actions to be performed by one or more of the lithography subsystems, and the parameters further defining how the action or sequence of actions are to be performed.
Abstract:
Data associated with a substrate can be processed by measuring a property of at least a first type of specific features and a second type of specific features on a substrate. The first type of specific features is measured at a first plurality of locations on the substrate to generate a first group of measured values, and the second type of specific features is measured at a second plurality of locations on the substrate to generate a second group of measured values, in which the first and second groups of measured values are influenced by critical dimension variations of the substrate. A combined measurement function is defined based on combining the at least first and second groups of measured values. At least one group of measured values is transformed prior to combining with another group or other groups of measured values, in which the transformation is defined by a group of coefficients. Variations in the critical dimension across the substrate are determined based on the combined measurement function and a predetermined relationship between the measured values and the critical dimension.
Abstract:
System and method for manufacturing three-dimensional integrated circuits are disclosed. In one embodiment, the method includes providing an imaging writer system that includes a plurality of spatial light modulator (SLM) imaging units arranged in one or more parallel arrays, receiving mask data to be written to one or more layers of the three-dimensional integrated circuit, processing the mask data to form a plurality of partitioned mask data patterns corresponding to the one or more layers of the three-dimensional integrated circuit, assigning one or more SLM imaging units to handle each of the partitioned mask data pattern, and controlling the plurality of SLM imaging units to write the plurality of partitioned mask data patterns to the one or more layers of the three-dimensional integrated circuits in parallel. The method of assigning performs at least one of scaling, alignment, inter-ocular displacement, rotational factor, or substrate deformation correction.
Abstract:
The present invention relates to customizing individual workpieces, such as chip, flat panels or other electronic devices produced on substrates, by direct writing a custom pattern. Customization can be per device, per substrate, per batch or at some other small volume that makes it impractical to use a custom mask or mask set. In particular, it relates to customizing a latent image formed in a radiation sensitive layer over a substrate, merging standard and custom pattern data to form a custom pattern used to produce the customized latent image. A wide variety of substrates can benefit from the technology disclosed.
Abstract:
System and method for applying mask data patterns Io substrate in a lithography manufacturing process are disclosed In one embodiment, the method includes providing a parallel imaging writer system having a plurality of spatial light modulator (SLM) imaging units as ranged m one or more parallel arrays receiving a mask data pattern to be written to a substrate, processing the mask data pattern to form a ρlurality of partitioned mask data patterns corresponding to different areas of the substrate, identifying objects in an area of the substrate to be imaged by corresponding SLMs, selecting evaluation points along edges of the objects, configuring the parallel imaging writes system to image the objects using the evaluations points, and performing multiple exposure to image the objects in the area of the substrate by controlling the plurality of SLMs to write the plurality of partitioned mask data patterns m parallel
Abstract:
System and method for processing image data between adjacent imaging areas in a lithography manufacturing process are disclosed, hi one embodiment, the method includes providing a parallel imaging writer system which has a plurality of spatial light modulator (SLM) imaging units arranged in one or more parallel arrays, receiving a mask data pattern to be written to a substrate, processing the mask data pattern to form a plurality of partitioned mask data patterns corresponding to different areas of the substrate, identifying an overlapping region between adjacent imaging areas to be imaged by corresponding SLMs, determining a stitching path for merging the adjacent imaging areas m the overlapping region in accordance with a set of predetermined cost functions, and controlling the plurality of SLM imaging units to write die plurality of partitioned mask data patterns to the substrate in parallel using the stitching path.