Lithographic apparatus and device manufacturing method utilizing a multiple dictionary compression method for FPD
First Claim
1. A system, comprising:
- a device having an emissive portion configured to produce a patterned beam;
a memory configured to store a compressed representation of a requested dose pattern to be formed on a surface by the patterned beam; and
a dictionary decompressor configured to at least partially decompress the compressed representation, and comprisinga first dictionary memory, anda second dictionary memory,wherein the requested dose pattern comprises two groups of repeating pattern features; and
wherein the dictionary decompressor is configured such that;
the first dictionary memory is configured to store pattern data corresponding to a first of the groups, andthe second dictionary memory is configured to store pattern data corresponding to a second of the groups, wherein the repeating pattern features in the first group have one or more differing characteristics than the repeating pattern features in the second group.
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Abstract
A system is provided that includes a device having an emissive portion, a memory, and a dictionary decompressor. The device having an emissive portion is configured to produce a patterned beam. The memory is configured to store a compressed representation of a requested dose pattern, comprising two groups of repeating pattern features, to be formed on a surface by the patterned beam. The dictionary decompressor at least partially decompresses the compressed representation. The dictionary decompressor comprises a first dictionary memory configured to store pattern data corresponding to a first group of the two groups of repeating pattern features and a second dictionary memory configured to store pattern data corresponding to a second group of the two groups of repeating pattern features. The repeating pattern features in the first group have one or more differing characteristics than the repeating pattern features in the second group. Related methods are also provided.
25 Citations
35 Claims
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1. A system, comprising:
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a device having an emissive portion configured to produce a patterned beam; a memory configured to store a compressed representation of a requested dose pattern to be formed on a surface by the patterned beam; and a dictionary decompressor configured to at least partially decompress the compressed representation, and comprising a first dictionary memory, and a second dictionary memory, wherein the requested dose pattern comprises two groups of repeating pattern features; and wherein the dictionary decompressor is configured such that; the first dictionary memory is configured to store pattern data corresponding to a first of the groups, and the second dictionary memory is configured to store pattern data corresponding to a second of the groups, wherein the repeating pattern features in the first group have one or more differing characteristics than the repeating pattern features in the second group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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generating a patterned beam; storing a compressed representation of a requested dose pattern to be formed on a surface by the patterned beam, wherein the requested dose pattern comprises two groups of repeating pattern features; and reading out and at least partially decompressing at least part of the compressed representation by extracting, from a dictionary memory including an external dictionary memory and an internal dictionary memory, portions of pattern data corresponding to references to the dictionary memory contained in the compressed representation, wherein the external dictionary memory stores pattern data corresponding to a first of the groups, wherein the internal dictionary memory stores pattern data corresponding to a second of the groups, and wherein the repeating pattern features in the first group have one or more differing characteristics than the repeating pattern features in the second group. - View Dependent Claims (21, 22)
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23. A method of compressing a stream of data representing a requested dose pattern for a lithographic apparatus, comprising:
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analyzing the stream of data to identify sequences of data that occur more than once; selecting a group from the identified repeating sequences of data to encode for later decompression by a dictionary decoder; and forming at least a portion of a compressed representation of the data stream by replacing at least one of the repeating sequences in the group by a reference to a location in a dictionary memory from which an uncompressed version of the repeating sequence will be accessible during decompression by the dictionary decoder. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification