PATENT CLAIM ANALYSIS

Application Number: 16167225
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-02
Patent Classification: ["438", "696000"]

Abstract:
A method for fabricating a layer structure in a trench includes: simultaneously forming a dielectric film containing a Si—N bond on an upper surface, and a bottom surface and sidewalls of the trench, wherein a top/bottom portion of the film formed on the upper surface and the bottom surface and a sidewall portion of the film formed on the sidewalls are given different chemical resistance properties by bombardment of a plasma excited by applying voltage between two electrodes between which the substrate is place in parallel to the two electrodes; and substantially removing the sidewall portion of the film by wet etching which removes the sidewall portion of the film more predominantly than the top/bottom portion according to the different chemical resistance properties.

Claim (Index 1):
A method for fabricating a layer structure constituted by a dielectric film containing a Si\u2014N bond in a recess formed in a substrate, comprising:\n (i) simultaneously forming a dielectric film containing a Si\u2014N bond on an upper surface and a bottom surface and a sidewall of the recess, wherein a top/bottom portion of the dielectric film formed on the upper surface and the bottom surface and a sidewall portion of the dielectric film formed on the sidewall are given different chemical resistance properties by bombardment of a plasma excited by applying voltage in a reaction space between two electrodes between which the substrate is placed in parallel to the two electrodes; and (ii) substantially removing selectively the sidewall portion of the dielectric film among the top/bottom portion and the sidewall portion of the dielectric film by etching which removes the sidewall portion of the dielectric film more predominantly than the other according to the different chemical resistance properties, wherein the plasma in step (i) is a capacitively coupled plasma (CCP) which is excited by applying RF power to one of the two electrodes, wherein plasma density in step (i) is adjusted in a manner rendering the chemical resistance properties of the top/bottom portion of the dielectric film higher than the chemical resistance properties of the sidewall portion of the dielectric film, and wherein the plasma density is modulable as a function of a ratio of high frequency RF power to a total of high frequency RF power and low frequency RF power constituting the RF power, wherein the plasma density decreases when increasing the ratio, wherein in step (i), solely the high frequency RF power is used, and the ratio is one, wherein the high-frequency RF power has a frequency of 1 MHz or higher, and the low-frequency RF power has a frequency of less than 1 MHz.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 97.0
- Lexical Diversity: 1.96923
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15592730', '15048422', '15650686', '15472750', '14884695']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8146921369941411
- 35 USC 102 Novelty (BERT): 0.5250397067587147
- Combined Prediction Score: 0.7857268939705985
- Mean Citation Score: 281.19482800000003
- Max Citation Score: 360.76556
- Similarity Product: 353.8302501900841

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