PATENT CLAIM ANALYSIS

Application Number: 15912099
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["257", "173000"]

Abstract:
A semiconductor device with a simplified structure including an energization control element and reverse coupling protection element, and a manufacturing method therefor. Its semiconductor substrate has deep and shallow trenches in its first surface. A first n-type impurity region lies in its second surface in contact with the deep trench bottom. A p-type impurity region includes: a p-type base region to make a pn junction with the first n-type region and in contact with the shallow trench bottom; and a back gate region joined to the p-type base region, lying in the first surface. A second n-type impurity region makes a pn junction with the p-type impurity region, lying in the first surface in contact with the shallow trench side face. An n +  source region makes a pn junction with the p-type region, lying in the first surface in contact with the side faces of deep and shallow trenches.

Claim (Index 16):
A method for manufacturing a semiconductor device having an energization control element including a first field effect transistor and a first diode and a reverse coupling protection element including a second field effect transistor and a second diode, the method comprising the steps of:\n providing a semiconductor substrate having a first surface and a second surface opposite to each other; forming a first region of first conductivity type located in the second surface; making a deep trench and a shallow trench shallower than the deep trench in the first surface; forming a first gate electrode included in the first field effect transistor in a manner to be located in the deep trench and forming a second gate electrode included in the second field effect transistor in a manner to be located in the shallow trench; forming a second region of second conductivity type having a first portion located nearer to the first surface than a bottom face of the deep trench to make a pn junction with the first region and in contact with a bottom face of the shallow trench and a side face of the deep trench, and a second portion joined to the first portion and located in the first surface; forming a third region of the first conductivity type in the first surface in a manner to make a pn junction with the second region and be in contact with a side face of the shallow trench; and forming a fourth region of the first conductivity type in the first surface in a manner to sandwich the shallow trench with the third region, make a pn junction with the second region, and be in contact with the side face of the deep trench and the side face of the shallow trench.

Metadata:
- Claim Count in Document: 35.0
- Percentile: 90.0
- Lexical Diversity: 2.6129
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10439540', '14324632', '13766148', '13965559', '12458968']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9026819460298184
- 35 USC 102 Novelty (BERT): 0.4825097156261699
- Combined Prediction Score: 0.8606647229894535
- Mean Citation Score: 217.457258
- Max Citation Score: 228.43718
- Similarity Product: 199.6294670672441

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