PATENT CLAIM ANALYSIS

Application Number: 16038463
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-05
Patent Classification: ["257", "330000"]

Abstract:
A plurality of trench stripes are disposed in parallel in an epitaxial layer on a drain and extends from a top region to a bottom region of a first surface of the semiconductor. A first polysilicon layer is in each of the trench stripes. The first polysilicon layer extends between the drain and the first surface proximal to the top region and the bottom region, and between the drain and a level below the first surface in a middle region between the top region and the bottom region. A second polysilicon layer is over the first polysilicon layer in the middle region, wherein the first poly silicon layer forms a shield, and the second polysilicon layer forms a gate. A source is in a silicon mesa stripe surrounding the first trench stripe.

Claim (Index 13):
A method for fabricating a semiconductor device comprising:\n forming a drain with a doped semiconductor substrate; growing an epitaxial layer on the drain; forming a plurality of trench stripes in the epitaxial layer, each of the trench stripes disposed in parallel with another of the trench stripes and extending from a top region of a first surface of the semiconductor device to a bottom region of the first surface, the first surface opposing the doped semiconductor substrate; forming a first polysilicon layer in each of the trench stripes separated from the epitaxial layer by a trench drift oxide, the first polysilicon layer extending between the drain and the first surface proximal to the top region and the bottom region, the first polysilicon layer extending between the drain and a level below the first surface in a middle region between the top region and the bottom region; depositing a second polysilicon layer over the first polysilicon layer in the middle region, the second polysilicon layer separated from the first polysilicon layer by an inter-poly dielectric, wherein the first polysilicon forms a shield, and the second polysilicon forms a gate; and forming a source in a silicon mesa stripe surrounding the first trench stripe.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 95.0
- Lexical Diversity: 2.85714
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15809954', '13600184', '11375975', '10810031', '12891485']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9197278748663744
- 35 USC 102 Novelty (BERT): 0.5141652613522053
- Combined Prediction Score: 0.8791716135149574
- Mean Citation Score: 224.053982
- Max Citation Score: 314.79868
- Similarity Product: 243.55167006643768

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