PATENT CLAIM ANALYSIS

Application Number: 15760458
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["257", "330000"]

Abstract:
A power semiconductor device of the present invention includes: a semiconductor base body which has a super junction structure formed of a plurality of first conductive-type columnar regions and a plurality of second conductive-type columnar regions; a plurality of trenches; gate insulation films; gate electrodes; an interlayer insulation film; contact holes formed such that two or more contact holes are formed between two trenches disposed adjacently to each other; metal plugs formed by filling the inside of the contact holes with metal; and an electrode, wherein a first conductive-type high concentration diffusion region is formed only between the trench and the metal plug disposed closest to the trench between each two trenches disposed adjacently to each other. According to the power semiconductor device of the present invention, it is possible to provide a power semiconductor device which satisfies a demand for reduction in cost and downsizing of electronic equipment, and has a large breakdown strength.

Claim (Index 10):
The method of manufacturing a power semiconductor device according to  claim 9 , wherein the semiconductor base body preparing step includes in the following order:\n a first step of preparing a semiconductor base body where a low resistance semiconductor layer and a first conductive-type semiconductor layer formed on the low resistance semiconductor layer and having lower dopant concentration than the low resistance semiconductor layer are stacked to each other; a second step of forming a plurality of second conductive-type column trenches having a predetermined depth by etching which uses an insulation film as a mask such that the plurality of the second conductive-type column trenches are arranged along a predetermined direction on a surface of the first conductive-type semiconductor layer; a third step of forming a second conductive-type embedded layer in the second conductive-type column trench by an epitaxial growth of a second conductive-type semiconductor material to a height position exceeding a surface height of the insulation film; a fourth step of removing a portion of the second conductive-type embedded layer exceeding the surface height of the insulation film; and a fifth step of forming a second conductive-type columnar region by etching such that a surface of the second conductive-type embedded layer is disposed deeper than a depth position of a bottom surface of the insulation film.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 90.0
- Lexical Diversity: 2.0
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16060058', '16060416', '15303730', '15514630', '15514615']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9348289352402708
- 35 USC 102 Novelty (BERT): 0.5356284829930456
- Combined Prediction Score: 0.8949088900155484
- Mean Citation Score: 315.990084
- Max Citation Score: 374.34518
- Similarity Product: 294.38454389240746

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