Touch interface design: Capacitive Touch Sensor and ITO design Tool

Abstract: A software tool for generating Indium Tin Oxide patterns (ITO) for touch panel manufacturing is developed that reduces the layout development time and human errors in the process of generation of layouts. AnIndium Tin Oxide ITO design tool is developed which reduces the layout development time and human error in generating the design for transparent ITO layer before touch panel manufacturing. The tool requires the user to input the configuration parameters for the ITO design in tuning with Capacitive Touch devices to generate sensor patterns. The ITO layer design can be single layer or multiple layers depending on the application and Capacitive Touch Controller used in the end product such as a smartphone or tablet. The tool developed can be used by the chip vendor or module maker to design and study different ITO patterns and understand the behavior. Introduction Capacitive Touch Panel based display solutions have changed the face of consumer, industrial and healthcare segment products. Any electronic products coming in the market; be it smartphones, gaming applications, Electrocardiography (ECG) machines or remote controls of television capacitive touch haveenhanced the end user experience. A capacitive touch panel as shown in Figure 1is made up of different layers stacked on the top of each other with the module thickness notexceeding 1 mm. ...