PATENT CLAIM ANALYSIS

Application Number: 16140295
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-05
Patent Classification: ["356", "401000"]

Abstract:
Scatterometry overlay (SCOL) single cell targets are provided, along with target design methods and measurement methods which employ the single cell SCOL targets for in-die metrology measurements, utilizing the small size of the target along with maintained optical performance due to the design of the target. Disclosed single cell targets comprise a lattice of elements at two or more layers which is periodic two or more measurement directions. Elements in different layers are offset with respect to each other and may have the same pitch along the measurement directions. Measurement algorithms are also provided to derive metrology measurements such as overlays from the single cell targets, possibly simultaneously in both (or more) measurement directions, reducing measurement time and enhancing the metrology throughput. Positioning the small targets in-die provides more accurate metrology results which are less sensitive to process variation.

Claim (Index 14):
A system comprising:\n a controller, the controller including one or more processors and memory, the memory storing program instructions configured to cause the one or more processors to: measure differential signals from a scatterometry overlay (SCOL) target, wherein the SCOL target comprises a single cell with a lattice of elements at least at two layers wherein:\n the lattice is periodic along at least two measurement directions, and \n the elements at one of the layers are offset with respect to the elements in another one of the layers along the at least two measurement directions, wherein the differential signals are measured simultaneously along the at least two measurement directions; and \n derive one or more overlay estimations along the at least two measurement directions from the measured differential signals.

Metadata:
- Claim Count in Document: 48.0
- Percentile: 97.0
- Lexical Diversity: 1.85366
- Patent Class: 356.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14457780', '14338023', '15159009', '15442111', '14152562']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6931486239097774
- 35 USC 102 Novelty (BERT): 0.4664871319983381
- Combined Prediction Score: 0.6704824747186334
- Mean Citation Score: 177.65769799999995
- Max Citation Score: 183.52165
- Similarity Product: 146.89468097652494

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