Development of a New Technology for Optically Inspecting Transparent Electrode Patterns of Touch Screen Panels
Dainippon Screen has announced the development of inspection technology for optically visualizing the transparent electrode patterns that are used in the touch screen panels of smartphones and tablet PCs. The new technology will allow the line widths of circuits and film thickness to be measured and inspected. The new technology is capable of detecting differences in the level of light reflection between the transparent electrode film that forms the circuit and the underlying support film.
The new technology is capable of measuring line widths and film thickness using images displaying the circuit making the new technology ideal for use in resistive projected capacitive as well as other types of touch panel, plus transparent electrodes of LCD monitors. Furthermore, the new technology is capable of automatically setting optimal measurement conditions for circuit patterns with different materials and film thicknesses. In addition to this the measurement position information can be managed as a numeric data, and the defect information can be fed immediately for simple process management at the production site. Dainippon Screen is planning to commercialize the new technology by March of 2013.