PATENT CLAIM ANALYSIS

Application Number: 16043674
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["257", "331000"]

Abstract:
Trench gate power MOSFET with an on-region. Cells in the on-region include a first epitaxial layer and a channel region. First trenches corresponding to polysilicon gates penetrate through the channel region, and each polysilicon gate is etched to form a groove in the top, the grooves filled with an interlayer film. A source region formed on side faces of the grooves in a self-aligned mode through angled ion implantation. Through the source region of a side structure, the surface of a portion, between the first trenches, of the channel region is directly exposed and formed with a well contact region. A front metal layer is formed on the surfaces of the cells in the on-region and leads out a source. The front metal layer of the source directly makes contact with well contact region and source region to form a connection structure without contact holes.

Claim (Index 3):
The trench gate power MOSFET according to  claim 1 , wherein a gate lead-out region is located outside the on-region, and includes a second trench, wherein the width of the second trench is larger than that of the first trench, and the second trench and the first trench are connected and formed at the same time;\n a gate dielectric layer is formed on a bottom surface and side faces of the second trench, the second trench is filled with a polysilicon gate made of polysilicon, the gate dielectric layer in the second trench and the gate dielectric layer in the first trench are formed at the same time, and the polysilicon gate in the second groove and the polysilicon gate in the first groove are formed at the same time and connected; a top surface of the polysilicon gate in the second trench is higher than or as high as a top surface of the second trench, and the polysilicon gate in the second trench has a side face directly covered by the channel region without any source region doping; and a contact hole is formed at a top of the polysilicon gate in the second trench, and each the polysilicon gate is connected to a gate formed by the front metal layer through the contact hole.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 95.0
- Lexical Diversity: 2.24286
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['12137527', '14771089', '12458293', '13377029', '14019159']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9159181869642572
- 35 USC 102 Novelty (BERT): 0.4991888424748598
- Combined Prediction Score: 0.8742452525153174
- Mean Citation Score: 249.28664
- Max Citation Score: 260.66483
- Similarity Product: 222.76948052223503

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