PATENT CLAIM ANALYSIS

Application Number: 15760579
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["257", "190000"]

Abstract:
A semiconductor base substance includes: a substrate; a buffer layer which is made of a nitride semiconductor and provided on the substrate; and a channel layer which is made of a nitride semiconductor and provided on the buffer layer, wherein the buffer layer includes: a first region which is provided on the substrate side and has boron concentration higher than acceptor element concentration; and a second region which is provided on the first region, and has boron concentration lower than that in the first region and acceptor element concentration higher than that in the first region. As a result, the semiconductor base substance which can obtain a high pit suppression effect while maintaining a high longitudinal breakdown voltage is provided.

Claim (Index 25):
A method for manufacturing a semiconductor base substance comprising: forming a buffer layer made of a nitride semiconductor on a substrate; and forming a channel layer made of a nitride semiconductor on the buffer layer,\n wherein the buffer layer comprises an initial layer made of AlN on the substrate side, the forming the buffer layer comprises introducing boron into the buffer layer in such a manner that boron concentration in the buffer layer gradually decreases from the substrate side toward the channel layer side, and doping of an acceptor element is started after formation of the initial layer in forming the buffer layer.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 90.0
- Lexical Diversity: 2.54902
- Patent Class: 257.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15741065', '14892034', '13617156', '14062304', '13728773']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.9144701008768455
- 35 USC 102 Novelty (BERT): 0.4681878746669624
- Combined Prediction Score: 0.8698418782558573
- Mean Citation Score: 198.43583
- Max Citation Score: 209.40463
- Similarity Product: 182.9152915899384

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