PATENT CLAIM ANALYSIS

Application Number: 15946060
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["257", "493000"]

Abstract:
To provide a semiconductor device including a power semiconductor element having improved reliability. The semiconductor device has a cell region and a peripheral region formed outside the cell region. The n type impurity concentration of n type column regions in the cell region is made higher than that of n type column regions comprised of an epitaxial layer in the peripheral region. Further, a charge balance is kept in each of the cell region and the peripheral region and each total electric charge is set so that a total electric charge of first p type column regions and a total electric charge of n type column regions in the cell region become larger than a total electric charge of third p type column regions and n type column regions comprised of an epitaxial layer in the peripheral region, respectively.

Claim (Index 5):
The method of manufacturing a semiconductor device according to  claim 1 , further comprising the following steps after the step (d):\n (e) forming a second epitaxial layer of the first conductivity type over the upper surface of the first epitaxial layer extending from the cell region to the peripheral region, (f) introducing an impurity of the first conductivity type into the second epitaxial layer in the cell region by ion implantation to form a plurality of fourth column regions having a first conductivity type impurity concentration higher than that of the second epitaxial layer and electrically coupled to the first column regions, respectively while separating the fourth column regions from each other in the first direction, (g) after the step (f), introducing an impurity of the second conductivity type into the second epitaxial layer in the cell region by ion implantation to form a plurality of fifth column regions electrically coupled to the second column regions, respectively, in a partial region sandwiched by the fourth column regions adjacent to each other, (h) introducing an impurity of the second conductivity type into the second epitaxial layer in the peripheral region by ion implantation to form a plurality of sixth column regions electrically coupled to the third column regions, respectively, while separating the sixth column regions from each other in the first direction, and (i) carrying out a step similar to a step having the steps (e), (f), (g), and (h) in repetition.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 91.0
- Lexical Diversity: 2.68519
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14705057', '15062029', '13105889', '14995996', '13731065']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9262357707301092
- 35 USC 102 Novelty (BERT): 0.596524265583008
- Combined Prediction Score: 0.8932646202153991
- Mean Citation Score: 353.0692
- Max Citation Score: 555.88916
- Similarity Product: 439.6009444116902

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

Dataset: test