PATENT CLAIM ANALYSIS

Application Number: 15993714
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-12
Patent Classification: ["257", "186000"]

Abstract:
A photodetector is provided. The photodetector is an avalanche photodiode of indium aluminum arsenide (InAlAs). An epitaxial-layers structure with n-side down is used. The strongest electric field of a multiplication layer (M-layer) is coated in inner bottom layers to avoid surface breakdown. An intrinsic layer is thickened; only one absorption layer is used; and a DBR layer is added below an n-type ohmic contact layer. A graded bandgap layer is etched to form a single mesa shape. Through the single mesa shape, all layers are far below breakdown except the M-layer has a particularly high electric field for restraining the electric field. Thus, the present invention changes holes into electrons through p-type-doping the absorption layer; because electrons run fast, carriers is made run fast; and junction capacitance is reduced with surface area increased by depletion layer thickened. Consequently, fast response speed is obtained while sensitivity is effectively improved.

Claim (Index 7):
The device according to  claim 6 ,\n wherein said M-layer is an undoped combination of In x Al 1-x As and In x1 Al 1-x1 As; and x is 0.52 and x1 is a positive number less than 0.52.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 93.0
- Lexical Diversity: 1.69
- Patent Class: 257.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['15060787', '12187525', '13549425', '12827587', '10720117']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.923741871400254
- 35 USC 102 Novelty (BERT): 0.5764271229714644
- Combined Prediction Score: 0.889010396557375
- Mean Citation Score: 348.683102
- Max Citation Score: 458.47128
- Similarity Product: 402.3053771728563

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