PATENT CLAIM ANALYSIS

Application Number: 16071943
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["356", "614000"]

Abstract:
A light spot arrangement, a surface profile measuring method and a method for calculating control data for an exposure field are disclosed. The light spot arrangement includes a plurality of measuring light spots ( 100 ) which define at least one set of orthogonal line segments, wherein the measuring light spots ( 100 ) lying on the orthogonal line segments radiate outward from a center, with each of the orthogonal line segments defined by at least four measuring light spots. The measuring light spots ( 100 ) are used to measure a profile of a planer surface. With this light spot arrangement comprising at least one set of orthogonal line segments defined by measuring light spots radiating outward from a center, readings of multiple ones of the light spots ( 100 ) can be acquired in real time, and exposure can be performed with real-time focusing and leveling based on a surface profile of the wafer ( 200 ) derived from a surface fitting process carried out on the readings. Specifically, during a scan performed by moving a wafer stage ( 300 ), readings of valid ones of the light spots are acquired as original surface profile data of the wafer ( 200 ), which are then processed to obtain leveling and focusing control data for the exposure field of the wafer stage ( 300 ).

Claim (Index 26):
A method for calculating control data for an exposure field, comprising using the surface profile measuring method as defined in  claim 16  to obtain the original surface profile data, and processing the original surface profile data to obtain the control data of the exposure field for the wafer stage, the processing comprising the steps of:\n 3) fitting the original surface profile data using a mathematical fitting model to obtain dense point surface profile data that are within an allowable tolerance range; and \n 4) performing surface fitting based on the dense point surface profile data according to a predetermined threshold, wherein if a number of valid dense points within the exposure field is greater than the threshold, the surface fitting is directly performed based on the corresponding dense point surface profile data; otherwise, if a number of valid dense points within the exposure field is smaller than the threshold, before the surface fitting is performed based on the corresponding dense point surface profile data, the exposure field is incrementally shifted inward or supplemented with adjacent candidate data points and each supplementation is followed by fitting the original surface profile data with the mathematical fitting model until the number of valid dense points reaches the threshold.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 95.0
- Lexical Diversity: 2.59783
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14857320', '15541347', '15540909', '11068904', '13208626']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6881963643855055
- 35 USC 102 Novelty (BERT): 0.484677597233615
- Combined Prediction Score: 0.6678444876703165
- Mean Citation Score: 174.88638400000005
- Max Citation Score: 190.18387
- Similarity Product: 130.84447788792968

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test