PATENT CLAIM ANALYSIS

Application Number: 15961322
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-08
Patent Classification: ["257", "334000"]

Abstract:
A method for manufacturing a power semiconductor device includes forming a trench in a semiconductor substrate, forming a gate insulation film and a gate electrode in the trench, implanting a first conductivity type impurity into the semiconductor substrate to form a first conductivity type body region, implanting a second conductivity type impurity onto a surface of the semiconductor substrate to form a second conductivity type source region, forming an interlayer insulation film in the trench, implanting the first conductivity type impurity onto the surface of the semiconductor substrate to form a first conductivity type highly doped body contact region, exposing a portion of a side surface of the trench, and forming a source metal to be in contact with the exposed side surface of the trench.

Claim (Index 2):
The method of  claim 1 , wherein:\n the exposing of the portion of the side surface of the trench comprises etching a portion of the interlayer insulation film to simultaneously expose the second conductivity type source region and the first conductivity type highly doped body contact region, and the interlayer insulation film is provided at only an interior of the trench.

Metadata:
- Claim Count in Document: 27.0
- Percentile: 91.0
- Lexical Diversity: 2.79167
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['13341349', '11211268', '10591192', '14068781', '14943109']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9302813096724848
- 35 USC 102 Novelty (BERT): 0.506357303086525
- Combined Prediction Score: 0.887888909013889
- Mean Citation Score: 255.084834
- Max Citation Score: 256.999
- Similarity Product: 173.8053266269565

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