Carbon Nanotube Bolometer Array With Per-Pixel Electric Field Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bolometer arrays suffer from variations in the doping state of the semiconducting carbon nanotube film, which leads to variations in the carrier density of states, causing inefficiencies in detection performance.
Innovation Solution
A bolometer array with a control device capable of adjusting a voltage applied to the third electrode for each bolometer, which includes a control device capable of adjusting a voltage applied to the third electrode for each bolometer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a plurality of bolometers are arranged in an array to improve detection coverage, then the detection area increases, but variations in the doping state of the semiconducting carbon nanotube film cause variations in resistance value and resistance temperature coefficient, deteriorating detection performance
Solution Approach 1:
The patent applies local quality by introducing a third electrode adjacent to each semiconducting carbon nanotube film to independently adjust the electric field for each bolometer. This allows local compensation for doping state variations in each region of the array, ensuring consistent detection performance across the entire array while maintaining large detection area coverage.
Solution Approach 2:
The patent changes the electric field parameter applied to each semiconducting carbon nanotube film by adjusting the voltage on the third electrode. By modifying this physical parameter, the resistance value and resistance temperature coefficient are compensated for variations in doping state, thereby maintaining uniform detection performance across all bolometers in the array.
2Strength
If the semiconducting carbon nanotube film is doped with protective film substance to improve film protection, then film durability increases, but the doping state varies depending on position, causing variations in carrier density of states and resistance characteristics
Solution Approach 1:
The patent compensates for the non-uniform doping state caused by protective film deposition by adjusting the electric field parameter for each bolometer through the third electrode. This allows the system to maintain optimal resistance characteristics despite variations in doping concentration across different positions.
Solution Approach 2:
The patent implements a feedback mechanism where the third electrode adjusts the electric field based on the actual characteristics of each semiconducting carbon nanotube film. This feedback loop compensates for manufacturing variations in doping state, ensuring that each bolometer operates with consistent performance characteristics.
3Measurement precision
If individual adjustment of each bolometer's characteristics is implemented to improve detection performance, then detection precision increases, but device complexity increases due to additional electrodes and control mechanisms
Solution Approach 1:
The patent introduces a third electrode adjacent to each semiconducting carbon nanotube film to enable independent adjustment of the electric field for each bolometer. This local adjustment capability allows precise compensation for position-dependent doping variations, improving detection precision while maintaining a relatively simple electrode configuration compared to full individualized control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bolometer array is capable of suppressing variations in detection performance due to differences in the characteristics of the bolometers, such as resistance value and resistance temperature coefficient, by adjusting the electric field applied to the carbon nanotube film.
Implementation Method 1
a third electrode that is disposed apart from the semiconducting carbon nanotube film and that is capable of adjusting an electric field applied to the semiconducting carbon nanotube film in accordance with the characteristics of the semiconducting carbon nanotube film
Implementation Method 2
bolometers are used to detect infrared rays
Implementation Method 3
the properties of the semiconducting carbon nanotube film change in a case where the film is doped with a substance such as a protective film
Data Source
AI summary
A bolometer array includes a plurality of bolometers and a substrate on which the bolometers are arranged side by side, each bolometer comprising a first electrode, a second electrode disposed on either side of the first electrode via an inter-electrode region, a semiconducting carbon nanotube film connected to the first electrode and the second electrode, and a third electrode disposed apart from the semiconducting carbon nanotube film and capable of adjusting the electric field applied to the semiconducting carbon nanotube film in accordance with the characteristics of the semiconducting carbon nanotube film.