PATENT CLAIM ANALYSIS

Application Number: 15873063
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-06
Patent Classification: ["427", "575000"]

Abstract:
A polycrystalline chemical vapour deposited (CVD) diamond wafer comprising: a largest linear dimension equal to or greater than 125 mm; a thickness equal to or greater than 200 μm; and one or both of the following characteristics measured at room temperature (nominally 298 K) over at least a central area of the polycrystalline CVD diamond wafer, said central area being circular, centred on a central point of the polycrystalline CVD diamond wafer, and having a diameter of at least 70% of the largest linear dimension of the polycrystalline CVD diamond wafer: an absorption coefficient ≤0.2 cm −1  at 10.6 μm; and a dielectric loss coefficient at 145 GHz, of tan δ≤2×10 −4 .

Claim (Index 1):
A process for fabricating a polycrystalline CVD diamond wafer having a largest linear dimension equal to or greater than 125 mm, a thickness equal to or greater than 200 \u03bcm, and one or both of the following characteristics measured at room temperature (nominally 298 K) over at least a central area of the polycrystalline CVD diamond wafer, said central area being circular, centred on a central point of the polycrystalline CVD diamond wafer, and having a diameter of at least 70% of the largest linear dimension of the polycrystalline CVD diamond wafer; a dielectric loss coefficient at 145 GHz, of tan \u03b4\u22645\u00d710 \u22125 ; and a thermal conductivity of no less than 1900 Wm \u22121 K \u22121 ; the process comprising:\n locating a substrate over the substrate holder, the substrate being rotationally symmetric and having a rotation axis of symmetry lying within 1.0 mm of the central rotational axis of symmetry of the resonance cavity when located over the substrate holder; feeding microwaves into the plasma chamber through the annular dielectric window at a power in a range 15 to 40 kW; feeding process gases into the plasma chamber through the one or more gas inlet nozzles, the process gases comprising an atomic concentration of hydrogen in a range 98 to 99%, an atomic concentration of carbon in a range 0.3 to 1.1%, and an atomic concentration of nitrogen in a range 30 to 270 ppm, wherein a total flow rate of the process gases lies in a range 2000 to 15000 sccm and a pressure within the plasma chamber lies in a range 140 to 235 Torr; growing a polycrystalline CVD diamond wafer on the substrate at a substrate temperature in a range 775 to 950\u00b0 C.; removing the polycrystalline CVD diamond wafer from the microwave plasma reactor; and polishing the polycrystalline CVD diamond wafer.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 86.0
- Lexical Diversity: 1.78873
- Patent Class: 427.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14362826', '14362847', '14419340', '14484100', '13994813']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7851428907888486
- 35 USC 102 Novelty (BERT): 0.5079976794288832
- Combined Prediction Score: 0.7574283696528521
- Mean Citation Score: 279.665778
- Max Citation Score: 295.58673
- Similarity Product: 282.6081607164412

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