PATENT CLAIM ANALYSIS

Application Number: 15752590
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["204", "192250"]

Abstract:
A semiconductor silicon-germanium thin film preparation method, comprising the following steps: cleaning a single crystal mono-crystalline silicon substrate and then disposing the same on a substrate table; respectively sputtering a silicon single thin film and a germanium single thin film; depositing a silicon-germanium alloy thin film having different components on another single crystal silicon substrate using a co-sputtering method, measuring the thickness of the deposited thin film, and obtaining a silicon-germanium alloy thin film having different component ratios.

Claim (Index 1):
A method for preparing a semiconductor silicon-germanium thin film, comprising the following steps:\n (1) cleaning a mono-crystalline silicon substrate by ultrasound in acetone for 5 min to 10 min; cleaning the substrate by ultrasound in methanol for 5 min to 10 min; cleaning the substrate by ultrasound in isopropanol for 5 min to 10 min; washing the mono-crystalline silicon substrate repeatedly with deionized water; drying and placing the mono-crystalline silicon substrate on a platform; (2) vacuumizing a vacuum chamber of a deposition system to between 8\u00d710 \u22128  Torr and 9\u00d710 \u22128  Torr; maintaining the chamber temperature between 20\u00b0 C. and 30\u00b0 C.; maintaining the pressure of the vacuum chamber between 8\u00d710 \u22128  Torr and 9\u00d710 \u22128 Torr; (3) sputtering a single thin film of silicon on the mono-crystalline silicon substrate under conditions: sputtering pressure from 4\u00d710 \u22124  Torr to 5\u00d710 \u22124  Torr, bias voltage of the cathode from 600V to 700V, argon as the sputtering gas, gas flow rate from 30 sccm to 50 sccm, sputtering duration from 30 min to 50 min; measuring the thickness of the deposited film and calculating the deposition rate of the silicon thin film under the current parameters; (4) sputtering a single thin film of germanium on another mono-crystalline silicon substrate under conditions: sputtering pressure from 4\u00d710 \u22124  Torr to 5\u00d710 \u22124  Torr, bias voltage of the cathode from 600V to 700V, argon as the sputtering gas, gas flow rate from 30 sccm to 50 sccm, the sputtering duration from 30 min to 50 min; measuring the thickness of the deposited film and calculating the deposition rate of the germanium thin film under the current parameters; (5) performing co-sputtering to deposit a silicon-germanium alloy thin film with different compositions on another mono-crystalline silicon substrate under conditions: sputtering pressure from 4\u00d710 \u22124  Torr to 5\u00d710 \u22124 Torr, bias voltage of the cathode from 600V to 700V, argon as the sputtering gas, gas flow rate from 30 sccm to 50 sccm, sputtering duration from 30 min to 50 min; measuring the thickness of the deposited film; obtaining a silicon-germanium alloy thin film with different compositions; and in above steps (3), (4) and (5), the sputtering pressure, bias voltage of the negative electrode, gas flow rate and sputtering duration are the same.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 88.0
- Lexical Diversity: 1.84783
- Patent Class: 204.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15062573', '12810920', '10101859', '12733160', '15352639']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7842281689713092
- 35 USC 102 Novelty (BERT): 0.497529519706629
- Combined Prediction Score: 0.7555583040448411
- Mean Citation Score: 218.94706800000003
- Max Citation Score: 222.82358
- Similarity Product: 138.27323381182433

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