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Related Concept Videos

Design Example: Resistive Touchscreen01:14

Design Example: Resistive Touchscreen

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A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
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Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
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When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
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Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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Rough-Surface-Enabled Capacitive Pressure Sensors with 3D Touch Capability.

Kilsoo Lee1, Jaehong Lee2, Gwangmook Kim1

  • 1Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul, 03722, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)
|May 20, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple, low-cost paper-based capacitive pressure sensor using pencil and paper. This flexible sensor offers high performance and is a step towards accessible omnipresent electronics.

Keywords:
capacitive pressure sensorselastomerpaper electronicssurface roughnesstouch interface

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Sensor Technology

Background:

  • Traditional device fabrication often involves complex, expensive processes, limiting accessibility.
  • There is a need for cost-effective, equipment-light fabrication strategies for omnipresent electronics.
  • Achieving both simplicity and high functionality in device manufacturing is challenging.

Purpose of the Study:

  • To present an accessible fabrication strategy for high-performance capacitive pressure sensors.
  • To utilize the inherent surface roughness of paper for sensor functionality.
  • To demonstrate the potential for low-cost, large-area fabrication of electronic sensors.

Main Methods:

  • Leveraging the natural surface roughness of paper through a simple writing activity with a pencil.
  • Constructing a fundamental capacitor structure on paper for pressure sensing.
  • Integrating paper-based sensors into a functional 3D touch-pad device.

Main Results:

  • A high-performance capacitive pressure sensor was realized using inexpensive paper and pencil.
  • The sensor exhibits high pressure sensitivity and a short response time.
  • The fabrication method is scalable for large-area production and requires minimal equipment.
  • Successful integration into a 3D touch-pad demonstrates practical application.

Conclusions:

  • The study demonstrates a novel, inartificial approach to sensor fabrication using paper.
  • This method offers a cost-effective and accessible alternative to traditional microfabrication.
  • The developed paper-based sensors are suitable for realizing omnipresent electronics and flexible devices.