摘要:
A method of optimising a process for use with a plurality of lithography systems. The method includes the steps of: (a) determining a calibrated resist model for a given process and a target pattern utilizing a first lithography system; (b) selecting a second lithography system to be utilized to image the target pattern utilizing the given process, the second lithography system capable of being configured with one of a plurality of diffractive optical elements, each of the plurality of diffractive optical elements having corresponding variable parameters for optimising performance of the given diffractive optical element; (c) selecting one of the plurality of diffractive optical elements and simulating the imaging performance of the second lithography system utilizing the selected one of the plurality of diffractive optical elements, the calibrated resist model and the target pattern; and (d) optimising the imaging performance of the selected one of the plurality of diffractive optical elements by executing a genetic algorithm which identifies the values of the parameters of the selected one of the plurality of diffractive optical elements that optimises the imaging of the target pattern.
摘要:
Lithographic apparatus includes a substrate table and a motion control system for controlling a movement of the substrate table. The motion control system includes at least 3 position detectors constructed for detecting a position of the substrate table. For measuring a position and orientation of the substrate table, each position detector comprises an optical encoder of a single dimensional or multi dimensional type, the optical encoders being arranged for providing together at least 6 position values, at least one position value being provided for each of the 3 dimensions. 3 or more of the at least 3 optical encoders being connected to the substrate table at different locations in the 3 dimensional coordinate system. The motion control system is arranged to calculate the position of the substrate table in the 3 dimensional coordinate system from a subset of at least 3 of the 6 position values and to calculate an orientation of the substrate table with respect to the coordinate system from another subset of at least 3 of the 6 position values. Further, a method for calibrating the position detectors is described.
摘要:
A method of optimising a process for use with a plurality of lithography systems. The method includes the steps of: (a) determining a calibrated resist model for a given process and a target pattern utilizing a first lithography system; (b) selecting a second lithography system to be utilized to image the target pattern utilizing the given process, the second lithography system capable of being configured with one of a plurality of diffractive optical elements, each of the plurality of diffractive optical elements having corresponding variable parameters for optimising performance of the given diffractive optical element; (c) selecting one of the plurality of diffractive optical elements and simulating the imaging performance of the second lithography system utilizing the selected one of the plurality of diffractive optical elements, the calibrated resist model and the target pattern; and (d) optimising the imaging performance of the selected one of the plurality of diffractive optical elements by executing a genetic algorithm which identifies the values of the parameters of the selected one of the plurality of diffractive optical elements that optimises the imaging of the target pattern.
摘要:
A process of manufacturing a liquid crystal display device of transverse electric-field type, wherein a halftone photomask (60) which is used to form a photoresist pattern has a fully light-shielding area (62) preventing UV irradiation of a portion of an active matrix substrate in which a thin-film transistor element (58) is to be formed, so that the photoresist- pattern includes a positive resist portion (6) which has a first thickness and which covers the above-indicated portion of the substrate. The halftone mask (60) further has a fully light-transmitting area (65) which permits fully UV transmission therethrough to provide the photoresist pattern with a resist-free area (8) which covers to a portion of the substrate in which a contact hole (59) serving as a third connection portion connecting an external scanning-line driver circuit and a scanning-line terminal portion (19) through a junction electrode (21) is to be formed. The photoresist pattern also has a positive resist portion (7) which covers the other portion of the substrate and which has a second thickness smaller than the first thickness. Also disclosed in a scan-exposing device (100, 110, 120, 130) used in the process.
摘要:
The invention discloses a method to easily determine the parameters of a second process for manufacturing from the parameters of a first process. Metrics representative of the differences between the two processes are computed from a number of values of the parameters, which can be measured for the two processes on a calibration layout, or which can be determined from pre-existing values for layouts or reference data for the two processes by an interpolation/extrapolation procedure. The number of metrics is selected so that their combination gives a precise representation of the differences between the two processes in all areas of a design. Advantageously, the metrics are calculated as a product of convolution of the target design and a compound of a kernel function and a deformation function.
摘要:
A method of determining a value of an exposure parameter when plural types of patterns are transferred onto a substrate (29) comprises calculating an optical image, formed on an image plane upon illuminating a pattern (26) on an object plane, for each of combinations of plural values of an exposure parameter and plural values of at least one of an exposure amount and a defocus amount, calculating, for each of the plural values of the exposure parameter, a deviation between a contour of a target optical image and a calculated contour of the optical image, in each of the plural types of patterns, and determining a value of the exposure parameter, at which a maximum value of the deviations among the plural types of patterns is minimum, as a value of the exposure parameter when exposing the substrate (29).
摘要:
A model-based tuning method for tuning a first lithography system utilizing a reference lithography system, each of which has tunable parameters for controlling imaging performance. The method includes the steps of defining a test pattern and an imaging model; imaging the test pattern utilizing the reference lithography system and measuring the imaging results; imaging the test pattern utilizing the first lithography system and measuring the imaging results; calibrating the imaging model utilizing the imaging results corresponding to the reference lithography system, where the calibrated imaging model has a first set of parameter values; tuning the calibrated imaging model utilizing the imaging results corresponding to the first lithography system, where the tuned calibrated model has a second set of parameter values; and adjusting the parameters of the first lithography system based on a difference between the first set of parameter values and the second set of parameter values.