PATENT CLAIM ANALYSIS

Application Number: 15894954
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2019-08
Patent Classification: ["257", "401000"]

Abstract:
A semiconductor device includes a semiconductor substrate, a dielectric layer, a gate structure, a source semiconductor feature, and a drain semiconductor feature. The semiconductor substrate has an active area and a shallow trench isolation (STI) structure surrounding the active area. The semiconductor substrate includes a protrusion structure in the active area and has an undercut at a periphery of the active area. The dielectric layer overlays the protrusion structure of the semiconductor substrate and fills at least a portion of the undercut of the protrusion structure. The gate structure crosses over the protrusion structure. The source semiconductor feature and the drain semiconductor feature are located in the active area and positioned at opposite sides of the gate structure.

Claim (Index 13):
A method of fabricating a semiconductor device, comprising following operations:\n (i) providing a semiconductor substrate having an active area, a shallow trench isolation (STI) structure surrounding the active area, and a doped region located in the active area; (ii) etching the semiconductor substrate to form a first protrusion structure, a source semiconductor feature, a drain semiconductor feature, and an etched STI structure, wherein the etched STI structure comprises a first portion and a second portion, the second portion of the etched STI structure has a top surface that is higher than a top surface of the first protrusion structure, and the top surface of the first protrusion structure is higher than a top surface of the first portion of the etched STI structure; (iii) etching the first protrusion structure to form a second protrusion structure, wherein the second protrusion structure has an undercut at a periphery of the active area; (iv) conformally forming a dielectric layer over the second protrusion structure; and (v) forming a gate structure crossing over the second protrusion structure, wherein the gate structure extends in a first direction, and the undercut extends in a second direction that is substantially perpendicular to the first direction.

Metadata:
- Claim Count in Document: 14.0
- Percentile: 88.0
- Lexical Diversity: 2.82609
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['12343831', '15867329', '13164297', '14694355', '11541267']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9172424703691688
- 35 USC 102 Novelty (BERT): 0.4700136425815751
- Combined Prediction Score: 0.8725195875904095
- Mean Citation Score: 203.541446
- Max Citation Score: 208.92574
- Similarity Product: 178.72741181066868

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