[China Instrument Network Instrument Development] Pressure sensors are indispensable for electronic touch products such as smart phones and tablet computers. However, at present, most of dielectric transistors based on silicon channels and silicon oxides have problems of opacity or inflexibility, and thus become a major obstacle in the manufacture of highly integrated pressure sensor arrays and transparent pressure sensors.
Recently, researchers from the National Institute of Science and Technology (UNIST) in Ulsan, South Korea, have developed a new type of sensor array capable of simultaneously measuring any object less than 10 kPa, such as tapping to more than 2 MPa, the weight of the human body, etc. For 3D touch panel or jogging shoes, the pressure detection range of the sensor is greatly improved. The results of this study were published in the recent Nature Communications.
The sensors in this study use highly conductive transparent graphene with an air dielectric layer and an elastomer that can draw air on the side of the foldable substrate. The sensor array can detect the pressure of the sliding, light touch, and finger that causes the air gap dielectric deformation, providing a method for measuring the size and position of the pressure. Furthermore, compared to passive matrix types, this new array consumes less power and has a faster response time.
The researchers said: "Using air as a dielectric layer for field effect transistors (FETs) can significantly increase the performance of transistors because the interface between the graphene channel and air is clean. In addition, the thickness of the air dielectric layer It is determined by the pressure applied. Therefore, through this technique, changes in pressure can be detected more effectively."
The new array technology developed by researchers of UNIST is very promising because it can generate electrical signals based on the detection of touch actions, and it also shows the position of the detected object and the size of the pressure, and is also more traditional than the pressure sensor. It is more transparent and consumes less power, which is different from the current touch sensors used for graphics.
(Original title: New graphene pressure sensor has better touch performance)
Recently, researchers from the National Institute of Science and Technology (UNIST) in Ulsan, South Korea, have developed a new type of sensor array capable of simultaneously measuring any object less than 10 kPa, such as tapping to more than 2 MPa, the weight of the human body, etc. For 3D touch panel or jogging shoes, the pressure detection range of the sensor is greatly improved. The results of this study were published in the recent Nature Communications.
The sensors in this study use highly conductive transparent graphene with an air dielectric layer and an elastomer that can draw air on the side of the foldable substrate. The sensor array can detect the pressure of the sliding, light touch, and finger that causes the air gap dielectric deformation, providing a method for measuring the size and position of the pressure. Furthermore, compared to passive matrix types, this new array consumes less power and has a faster response time.
The researchers said: "Using air as a dielectric layer for field effect transistors (FETs) can significantly increase the performance of transistors because the interface between the graphene channel and air is clean. In addition, the thickness of the air dielectric layer It is determined by the pressure applied. Therefore, through this technique, changes in pressure can be detected more effectively."
The new array technology developed by researchers of UNIST is very promising because it can generate electrical signals based on the detection of touch actions, and it also shows the position of the detected object and the size of the pressure, and is also more traditional than the pressure sensor. It is more transparent and consumes less power, which is different from the current touch sensors used for graphics.
(Original title: New graphene pressure sensor has better touch performance)
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