PATENT CLAIM ANALYSIS

Application Number: 15741361
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-01
Patent Classification: ["029", "025350"]

Abstract:
To provide a method of producing a lithium niobate (LN) substrate which allows treatment conditions regarding a temperature, a time, and the like to be easily managed and in which an in-plane distribution of a volume resistance value is very small, and also variations in volume resistivity are small among substrates machined from the same ingot. A method of producing an LN substrate by using an LN single crystal grown by the Czochralski process, in which a lithium niobate single crystal having a Fe concentration of 50 mass ppm or more and 2000 mass ppm or less in the single crystal and being in a form of an ingot is buried in an Al powder or a mixed powder of Al and Al 2 O 3 , and heat-treated at a temperature of 450° C. or more and less than 660° C., which is a melting point of aluminum, to produce a lithium niobate single crystal substrate having a volume resistivity controlled to be within a range of 1×10 8  Ω·cm or more to 2×10 12  Ω·cm or less.

Claim (Index 7):
The method of producing a lithium niobate single crystal substrate according to  claim 3 , wherein\n the heat treatment is conducted in a vacuum atmosphere or in a reduced-pressure atmosphere of an inert gas.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 86.0
- Lexical Diversity: 2.03226
- Patent Class: 29.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['10980829', '15572639', '10574276', '11838345', '11746211']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8890762754592366
- 35 USC 102 Novelty (BERT): 0.5152660700776845
- Combined Prediction Score: 0.8516952549210814
- Mean Citation Score: 263.928134
- Max Citation Score: 312.1897600000001
- Similarity Product: 232.7031059613037

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

Dataset: test