PATENT CLAIM ANALYSIS

Application Number: 15993922
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-12
Patent Classification: ["257", "192000"]

Abstract:
A method can be used for fabricating first and second semiconductor regions separated by isolating trenches. A semiconductor substrate is covered with silicon nitride. The silicon nitride situated above the first region is doped by ion implantation. Trenches are etched through the silicon nitride and the doped silicon nitride is partially etching in an isotropic manner. The trenches are filled with an insulator to a level situated above that of the first region. The silicon nitride is removed resulting in the edges of the first region only being covered with an insulator annulus.

Claim (Index 1):
A method for fabricating a semiconductor device, the method comprising:\n forming a silicon nitride layer over a semiconductor substrate; doping the silicon nitride layer above a region of the semiconductor substrate, the doping performed by ion implantation; etching trenches through the silicon nitride layer, the trenches etched into the semiconductor substrate; partially isotropically etching the doped silicon nitride layer; filling the trenches with an insulator to a level higher than a level of an upper surface of the region of the semiconductor substrate; and removing remaining portions the silicon nitride layer from over the region of the semiconductor substrate, edges of the region of the semiconductor substrate being covered with an insulator annulus after removing the silicon nitride layer.

Metadata:
- Claim Count in Document: 6.0
- Percentile: 93.0
- Lexical Diversity: 1.83333
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15992481', '11024935', '12869978', '10996866', '10616396']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9006109196407639
- 35 USC 102 Novelty (BERT): 0.5061734119656834
- Combined Prediction Score: 0.8611671688732558
- Mean Citation Score: 233.14608400000003
- Max Citation Score: 285.7944
- Similarity Product: 248.2100328756809

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