PATENT CLAIM ANALYSIS

Application Number: 16110508
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2018-12
Patent Classification: ["257", "330000"]

Abstract:
First and second cell trench structures extend from a first surface into a semiconductor substrate. The first cell trench structure includes a first buried electrode and a first insulator layer between the first buried electrode and a semiconductor mesa separating the first and second cell trench structures. A capping layer covers the first surface. The capping layer is patterned to form an opening having a minimum width larger than a thickness of the first insulator layer. The opening exposes a first vertical section of the first insulator layer at the first surface. An exposed portion of the first insulator layer is removed to form a recess between the semiconductor mesa and the first buried electrode. A contact structure is in the opening and the recess. The contact structure electrically connects both a buried zone in the semiconductor mesa and the first buried electrode and allows for narrower semiconductor mesa width.

Claim (Index 14):
A method of manufacturing a semiconductor device, the method comprising:\n forming a plurality of source zones of a first conductivity type in a semiconductor substrate as stripes which extend lengthwise in parallel in a first direction; forming a plurality of body zones of a second conductivity type opposite the first conductivity type in the semiconductor substrate below the plurality of source zones; forming a plurality of heavily doped contact zones in the body zones; forming a plurality of first cell trench structures in the semiconductor substrate and extending lengthwise in parallel in a second direction transverse to the first direction so as to transect the stripes of source zones and the body zones, each first cell trench structure comprising a first buried electrode and a first insulator layer between the first buried electrode and the semiconductor substrate; forming a plurality of second cell trench structures in the semiconductor substrate and extending lengthwise in parallel in the second direction so as to transect the stripes of source zones and the body zones, two or more second cell trench structures being interposed between neighboring ones of the first cell trench structures, each second cell trench structure comprising a second buried electrode and a second insulator layer between the second buried electrode and the semiconductor substrate; forming a recess in the first insulator layer along a sidewall of one or more of the first cell trench structures and vertically extending to the corresponding heavily doped contact zone; and disposing an electrically conductive material in each recess formed in the first insulator layer so as to contact the corresponding first buried electrode, the corresponding source zone and the corresponding heavily doped contact zone at the sidewall.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 96.0
- Lexical Diversity: 2.63333
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13963312', '15188217', '14092312', '15057800', '14529500']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9269663564279488
- 35 USC 102 Novelty (BERT): 0.5394082844238114
- Combined Prediction Score: 0.8882105492275351
- Mean Citation Score: 314.830794
- Max Citation Score: 390.7131
- Similarity Product: 323.86282584217787

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test