PATENT CLAIM ANALYSIS

Application Number: 15988018
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-01
Patent Classification: ["438", "270000"]

Abstract:
A manufacturing method of a trench power semiconductor device is provided. The manufacturing method includes the steps of forming a protective layer on an epitaxial layer and forming a trench gate structure in a trench formed in an epitaxial layer. The trench gate structure includes a shielding electrode, a gate disposed on the shielding electrode and an inter-electrode dielectric layer disposed therebetween. The step of forming the trench gate structure includes forming an insulating layer covering an inner surface of the trench; and before the step of forming the inter-electrode dielectric layer, forming an initial spacing layer, the spacing layer including a first sidewall portion and a second sidewall portion, both of which include bottom end portions spaced apart from each other and extending portions protruding from the protective layer.

Claim (Index 1):
A manufacturing method of a trench power semiconductor device, comprising:\n forming an epitaxial layer on a substrate; forming a protective layer on a surface of the epitaxial layer; forming a trench in the epitaxial layer; and forming a trench gate structure in the trench, wherein the trench gate structure includes a shielding electrode, a gate disposed on the shielding electrode and an inter-electrode dielectric layer disposed between the shielding electrode and the gate, and the step of forming the trench gate structure at least includes:\n forming an insulating layer covering an inner surface of the trench; and \n before the step of forming the inter-electrode dielectric layer, forming an initial spacing layer, wherein the initial spacing layer includes a first sidewall portion and a second sidewall portion respectively covering the two inner surfaces of the insulating layer, the bottom end portion of the first sidewall portion is separate from the bottom end portion of the second sidewall portion, and both of the first and second sidewall portions have an extending portion protruding from the protective layer.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 2.27869
- Patent Class: 438.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15975023', '15090966', '15005130', '14994250', '15186685']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8628274718730421
- 35 USC 102 Novelty (BERT): 0.4854948919285096
- Combined Prediction Score: 0.8250942138785888
- Mean Citation Score: 232.767146
- Max Citation Score: 257.19028
- Similarity Product: 230.4276434795117

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

Dataset: test