PATENT CLAIM ANALYSIS

Application Number: 15752985
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["117", "088000"]

Abstract:
In forming of a silicon carbide layer, when an X axis indicates a first value representing, in percentage, a value obtained by dividing a flow rate of silane by a flow rate of hydrogen and a Y axis indicates a second value representing a flow rate of ammonia in sccm, the first value and the second value fall within a quadrangular region surrounded by first coordinates, second coordinates, third coordinates, and fourth coordinates in XY plane coordinates. The first coordinates are (0.05, 6.5×10 −4 ). The second coordinates are (0.05, 4.5×10 −3 ). The third coordinates are (0.22, 1.2×10 −2 ). The fourth coordinates are (0.22, 1.3×10 −1 ). After the forming of the silicon carbide layer, an average value of carrier concentration of the silicon carbide layer is more than or equal to 1×10 15  cm −3  and less than or equal to 2×10 16  cm −3 .

Claim (Index 5):
An apparatus for manufacturing a silicon carbide epitaxial substrate, the apparatus comprising:\n a reaction chamber configured to be capable of heating a silicon carbide single crystal substrate; a gas supplier configured to be capable of supplying the reaction chamber with a mixed gas including silane, ammonia, and hydrogen; and a controller configured to be capable of controlling a flow rate of the mixed gas supplied from the gas supplier to the reaction chamber, the controller being configured to be capable of controlling a flow rate of the silane, a flow rate of the ammonia, and a flow rate of the hydrogen such that when an X axis indicates a first value representing, in percentage, a value obtained by dividing the flow rate of the silane by the flow rate of the hydrogen and a Y axis indicates a second value representing the flow rate of the ammonia in sccm, the first value and the second value fall within a quadrangular region surrounded by first coordinates, second coordinates, third coordinates, and fourth coordinates in XY plane coordinates, the first coordinates being (0.05, 6.5\u00d710 \u22124 ), the second coordinates being (0.05, 4.5\u00d710 \u22123 ), the third coordinates being (0.22, 1.2\u00d710 \u22122 ), the fourth coordinates being (0.22, 1.3\u00d710 \u22121 ).

Metadata:
- Claim Count in Document: 13.0
- Percentile: 88.0
- Lexical Diversity: 2.36111
- Patent Class: 117.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15743950', '15319130', '15762147', '14778271', '15750606']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7564876087082034
- 35 USC 102 Novelty (BERT): 0.5033720073029022
- Combined Prediction Score: 0.7311760485676734
- Mean Citation Score: 238.372996
- Max Citation Score: 287.76242
- Similarity Product: 234.36303333862784

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

Dataset: test