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 6):
The manufacturing method of a trench power semiconductor device according to  claim 5 , wherein the step of forming the initial spacing layer includes:\n forming a spacing dielectric layer, wherein the spacing dielectric layer covers the surface of the hard film layer, the inner surface of the opening, the two sidewall portions and the bottom of the insulating layer, and the material for the spacing dielectric layer is the same as the material for the protective layer; and removing the spacing dielectric layer covering the bottom and the surface of the hard film layer to form the initial spacing layer, wherein the extending portions of the first sidewall portion and the second sidewall portion cover the inner surface of the opening.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 2.27869
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15975023', '15090966', '15005130', '14994250', '15186685']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.87508612451513
- 35 USC 102 Novelty (BERT): 0.5008078170135247
- Combined Prediction Score: 0.8376582937649695
- Mean Citation Score: 232.767146
- Max Citation Score: 257.19028
- Similarity Product: 192.85899991212128

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