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 16):
A surface profile measuring method, comprising the steps of:\n 1) forming a light spot arrangement in an exposure field of a wafer, wherein the light spot arrangement comprises a plurality of measuring light spots which define at least one set of orthogonal line segments, wherein the measuring light spots 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; causing the wafer stage to perform an exposure scan movement with a height and a tilt of the wafer stage remaining unchanged, until all the exposure fields of the wafer have been scanned; during the exposure scan movement, obtaining readings of each of the measuring light spots in the light spot arrangement, and collecting height values and horizontal positions of each of the measuring light spots at different time instants; and 2) converting the readings of each of the measuring light spots into coordinate values in a coordinate system of the wafer stage, and taking the coordinate values as original surface profile data.

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): 0.6877893232668467
- 35 USC 102 Novelty (BERT): 0.486535565446959
- Combined Prediction Score: 0.667663947484858
- Mean Citation Score: 174.88638400000005
- Max Citation Score: 190.18387
- Similarity Product: 128.33961954992176

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test