PATENT CLAIM ANALYSIS

Application Number: 16104512
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["216", "067000"]

Abstract:
A decrease of an etching rate of a substrate can be suppressed, and energy of ions irradiated to an inner wall of a chamber main body can be reduced. A plasma processing apparatus includes a DC power supply configured to generate a negative DC voltage to be applied to a lower electrode of a stage. In a plasma processing performed by using the plasma processing apparatus, a radio frequency power is supplied to generate plasma by exciting a gas within a chamber. Further, the negative DC voltage from the DC power supply is periodically applied to the lower electrode to attract ions in the plasma onto the substrate placed on the stage. A ratio occupied, within each of cycles, by a period during which the DC voltage is applied to the lower electrode is set to be equal to or less than 40%.

Claim (Index 1):
A plasma processing method performed in a plasma processing apparatus,\n wherein the plasma processing apparatus comprises: a chamber main body in which a chamber is provided; a stage, including a lower electrode, provided within the chamber main body and configured to support a substrate placed thereon; a radio frequency power supply configured to supply a radio frequency power for exciting a gas supplied into the chamber; and one or more DC power supplies configured to generate a negative DC voltage to be applied to the lower electrode, wherein the plasma processing method comprises: supplying the radio frequency power from the radio frequency power supply to generate plasma of the gas supplied into the chamber; and applying the negative DC voltage to the lower electrode from the one or more DC power supplies to attract ions in the plasma onto the substrate, and wherein, in the applying of the negative DC voltage, the negative DC voltage is applied to the lower electrode periodically, and a duty ratio is set to be equal to or less than 40%, wherein the duty ratio is a percentage occupied within a single cycle by a period during which the negative DC voltage is applied to the lower electrode.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 96.0
- Lexical Diversity: 2.10959
- Patent Class: 216.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16003954', '12707957', '14972286', '15075505', '14853140']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.796397669840761
- 35 USC 102 Novelty (BERT): 0.4915086944025006
- Combined Prediction Score: 0.765908772296935
- Mean Citation Score: 256.496096
- Max Citation Score: 278.7438
- Similarity Product: 249.40598155531885

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

Dataset: test