PATENT CLAIM ANALYSIS

Application Number: 15992481
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-01
Patent Classification: ["257", "351000"]

Abstract:
A method can be used for fabricating first and second semiconductor regions separated by isolating trenches. A semiconductor substrate is covered with a first silicon nitride layer. The first region is covered with a protection layer that can be etched selectively with respect to the silicon nitride. The structure is covered with a second silicon nitride layer. The trenches are etched through the second and first silicon nitride layers and filled with a filling silicon oxide to a level situated above the protection layer. The second silicon nitride layer and the part of the first silicon nitride layer situated on the second region are selectively removed and the protection layer is removed. The filling oxide is selectively etched by wet etching, thus resulting in pits on the surface of the filling oxide around the second region.

Claim (Index 3):
The method according to  claim 2 , wherein the protection layer is removed selectively by the wet etching.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 93.0
- Lexical Diversity: 2.52632
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13904194', '11370454', '11081919', '12256357', '12164579']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.926505949547792
- 35 USC 102 Novelty (BERT): 0.5015824979997433
- Combined Prediction Score: 0.884013604392987
- Mean Citation Score: 215.311514
- Max Citation Score: 218.23335
- Similarity Product: 138.6554020101517

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

Dataset: test