PATENT CLAIM ANALYSIS

Application Number: 15936048
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-08
Patent Classification: ["438", "135000"]

Abstract:
A method for producing a semiconductor device includes implanting protons from a rear surface of a semiconductor substrate of a first conductivity type, and after the implanting protons, forming a first semiconductor region of the first conductivity type having a impurity concentration higher than that of the semiconductor substrate by performing an annealing process for the semiconductor substrate in an annealing furnace. The forming a first semiconductor region includes substituting oxygen gas for nitrogen gas in a normal pressure atmosphere, thereby reducing a partial pressure of the oxygen in the annealing furnace, and after the subtracting oxygen gas, performing the annealing process in the annealing furnace with a hydrogen gas atmosphere in a range of 300° C. to 450° C. The hydrogen gas atmosphere includes a volume concentration of hydrogen in a range of 6% to 30%.

Claim (Index 2):
A method for producing a semiconductor device comprising:\n implanting protons from a rear surface of a semiconductor substrate of a first conductivity type; and after the implanting protons, forming a first semiconductor region of the first conductivity type that has a impurity concentration higher than an impurity concentration of the semiconductor substrate by performing an annealing process for the semiconductor substrate in an annealing furnace, the forming a first semiconductor region including;\n reducing a partial pressure of the oxygen in the annealing furnace by reducing an internal pressure of the annealing furnace, and introducing nitrogen gas and hydrogen gas into the annealing furnace until the internal pressure of the annealing furnace is a normal pressure, and \n after the reducing a partial pressure of the oxygen in the annealing furnace, performing the annealing process in the annealing furnace with a hydrogen gas atmosphere in a range of 300\u00b0 C. to 450\u00b0 C., the hydrogen gas atmosphere including a volume concentration of hydrogen in a range of 6% to 30%.

Metadata:
- Claim Count in Document: 44.0
- Percentile: 90.0
- Lexical Diversity: 2.39344
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14372004', '14372450', '15837318', '15288132', '14372451']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8907770701650879
- 35 USC 102 Novelty (BERT): 0.5585797466582574
- Combined Prediction Score: 0.8575573378144049
- Mean Citation Score: 394.252184
- Max Citation Score: 441.02234
- Similarity Product: 377.3692067483449

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

Dataset: test