PATENT CLAIM ANALYSIS

Application Number: 15869023
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-06
Patent Classification: ["257", "341000"]

Abstract:
In a semiconductor device including a super junction structure that p-type columns and n-type columns are periodically arranged, a depth of a p-type column region in a cell region that a semiconductor element is formed is made shallower than a depth of a p-type column region in an intermediate region which surrounds the cell region. Thereby, a breakdown voltage of the cell region becomes lower than a breakdown voltage of the intermediate region. An avalanche breakdown phenomenon is caused to occur preferentially in the cell region in which even when an avalanche current is generated, the current is dispersed and smoothly flows. Thereby, it is possible to avoid local current constriction and breakage incidental thereto and consequently it becomes possible to improve avalanche resistance (an avalanche current amount with which a semiconductor device comes to be broken).

Claim (Index 11):
A manufacturing method for semiconductor devices, comprising the steps of:\n (a) forming a plurality of first ditches in a first region of a first conductivity type semiconductor layer and forming a plurality of second ditches in a second region which surrounds the first region of the semiconductor layer; (b) embedding a semiconductor of a second conductivity type which is a reverse conductivity type of the first conductivity type in the first ditches and the second ditches thereby (b1) forming a first pillar in each of the first ditches and forming a second pillar which is configured by the semiconductor layer between the first pillars, and (b2) forming a third pillar in each of the second ditches and forming a fourth pillar which is configured by the semiconductor layer between the third pillars; (c) forming a semiconductor element in the first region; and (d) implanting an impurity of the first conductivity type into a lower part of each of the first pillars in the first ditches.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 86.0
- Lexical Diversity: 2.04167
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14965899', '14826075', '15355469', '16300348', '15640375']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9046724656511556
- 35 USC 102 Novelty (BERT): 0.5037852624136209
- Combined Prediction Score: 0.8645837453274021
- Mean Citation Score: 241.404856
- Max Citation Score: 303.7593700000001
- Similarity Product: 280.443907005874

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