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 1):
A power semiconductor device comprising:\n a semiconductor base body having: a low resistance semiconductor layer; a first conductive-type semiconductor layer formed on the low resistance semiconductor layer and having lower dopant concentration than the low resistance semiconductor layer; a plurality of second conductive-type column trenches arranged on a surface of the first conductive-type semiconductor layer along a predetermined direction; a plurality of second conductive-type columnar regions formed of an epitaxial regions of a second conductive-type semiconductor material formed in the second conductive-type column; second conductive-type base regions formed on surfaces of the first conductive-type semiconductor layer and the plurality of second conductive-type columnar regions; and first conductive-type high concentration diffusion regions formed on surfaces of the base regions at predetermined positions, wherein regions sandwiched between the plurality of second conductive-type column trenches disposed adjacently to each other in the first conductive-type semiconductor layer forms a plurality of first conductive-type columnar regions, the plurality of first conductive-type columnar regions and the plurality of second conductive-type columnar regions are alternately formed along a predetermined direction, and a super junction structure is formed of the plurality of first conductive-type columnar regions and the plurality of second conductive-type columnar regions;\n a plurality of trenches formed within regions where the first conductive-type columnar regions are formed as viewed in a plan view, the trenches being formed such that the trenches penetrate the base regions and extend to a depth position where the trenches reach the first conductive-type columnar regions, the trenches allowing portions of the first conductive-type high concentration diffusion regions to be exposed on respective inner peripheral surfaces of the respective trenches; \n gate insulation films each of which is formed on the inner peripheral surface of each trench; \n gate electrodes each of which is embedded in each trench by way of the gate insulation film; \n an interlayer insulation film formed so as to cover the base regions, the first conductive-type high concentration diffusion regions, the gate insulation films and the gate electrodes; \n contact holes formed such that the contact holes penetrate the interlayer insulation film and reach at least the base regions, two or more contact holes being formed between each two trenches disposed adjacently to each other; \n metal plugs formed by filling the inside of the contact holes with metal; and \n an electrode formed on the interlayer insulation film, the electrode being electrically connected with the base regions and the first conductive-type high concentration diffusion regions through the metal plugs, wherein \n the semiconductor base body further comprises second conductive-type high concentration diffusion regions which are brought into contact with bottom surfaces of the metal plugs, are electrically connected with the electrode through the metal plugs, and have higher dopant concentration than the base region, and \n in the semiconductor base body, the first conductive-type high concentration diffusion region is formed only between the trench and the metal plug disposed closest to the trench between two trenches disposed adjacently to each other.

Metadata:
- Claim Count in Document: 18.0
- Percentile: 90.0
- Lexical Diversity: 2.0
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16060058', '16060416', '15303730', '15514630', '15514615']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9270537407943892
- 35 USC 102 Novelty (BERT): 0.5334396550475083
- Combined Prediction Score: 0.8876923322197011
- Mean Citation Score: 315.990084
- Max Citation Score: 374.34518
- Similarity Product: 313.9010040546429

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

Dataset: test