PATENT CLAIM ANALYSIS

Application Number: 16069622
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["438", "270000"]

Abstract:
A method for manufacturing a compound semiconductor device includes causing epitaxial growth of a p-type impurity layer containing a compound semiconductor on a foundation layer containing the compound semiconductor. The causing the epitaxial growth includes performing pre-doping to preliminarily introduce dopant gas before introducing material gas for the epitaxial growth of the compound semiconductor. The dopant gas contains an organic metal material providing dopant of p-type impurities. An impurity concentration profile of the p-type impurity layer is controlled by controlling a time of the pre-doping.

Claim (Index 4):
The method for manufacturing the compound semiconductor device according to  claim 1 , wherein\n the compound semiconductor includes silicon carbide, the method further comprises: providing a semiconductor substrate that is formed of first conductive type silicon carbide and includes a rear face layer and a drift layer, the rear face layer having a high impurity concentration and disposed on a rear face side of the semiconductor substrate, the drift layer having an impurity concentration lower than the rear face layer, disposed on a front face side of the semiconductor substrate, and providing the foundation layer; forming a base area on the drift layer, the base area containing silicon carbide; forming a source area above the base area, the source area containing first conductive type silicon carbide having an impurity concentration higher than the drift layer; forming a trench that extends from a front face of the source area to a position deeper than the base area; forming a trench gate structure by forming a gate insulation film on an inner wall surface of the trench, and forming a gate electrode on the gate insulation film; forming a source electrode that is electrically connected to the source area; and forming a drain electrode that is electrically connected to the rear face layer disposed on the rear face side of the semiconductor substrate, and the forming the base area includes the causing the epitaxial growth.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 95.0
- Lexical Diversity: 1.93478
- Patent Class: 438.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16069927', '16069914', '14894668', '14387425', '11268612']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8739034583001012
- 35 USC 102 Novelty (BERT): 0.4958518610722358
- Combined Prediction Score: 0.8360982985773147
- Mean Citation Score: 232.571962
- Max Citation Score: 271.13406000000003
- Similarity Product: 235.7367577761555

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