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Dainippon Screen to Release Transparent Electrodes Monitor for Touch Panels

Tokyo, Apr 22, 2014 (JCN) - Dainippon Screen Mfg. Co., Ltd. will release its new TM-1C transparent electrodes monitor, developed specifically for the touch panels used in smartphones and tablet computers.

The TM-1C's optical system enables effective visualization of circuit patterns, providing rapid identification of defect locations and measurement of line widths.

The system is expected to significantly improve yield rates for touch panels as they become progressively thinner and more precise.

Touch panel manufacturers have worked to develop transparent electrodes with increasingly fine circuit patterns as well as panels with enhanced transparency.

However, there have only been two methods available for defect inspection of transparent panels, either a pass/fail judgment performed after circuit formation using conductivity inspection or the time-consuming identification of error locations using laser microscopy.

For this reason, it has become increasingly difficult to determine the source of defects as circuit patterns have grown in fineness and transparency.

Unsurprisingly, to ensure the continuing stable supply of touch panels, the industry urgently needs to find a balanced solution that will allow the improvement of both production efficiency and yield rates.

In 2012, Dainippon Screen's research led to the creation of an optical technology for visualizing the circuit patterns of transparent electrodes on touch panels. This development makes it possible to identify defect locations and also measure line widths.

In addition to introducing the concept at domestic and overseas exhibitions, Dainippon Screen has engaged in technical cooperation with touch panel and materials manufacturers to bring this technology to market.

These efforts have now culminated in the upcoming release of the TM-1C, a monitoring system for transparent electrodes that combines Dainippon Screen’s new visualization technology and accumulated experience and knowhow.

The TM-1C provides quick and easy visualization of circuit patterns, boosting yield rates and resolving the quality control bottleneck created by defect inspection and sampling in each stage of processing.

For a 7 inch tablet (W170 x H120 mm), scanning procedures that require around 100 minutes using conventional laser microscopy can be executed in as little as 15 seconds.

It is also now possible to perform previously difficult quality control procedures for PET films laminated with cover glasses, and detection of ultra-fine cracks, highlighting the TM-1C's outstanding functionality.

Sales of the TM-1C are scheduled to begin in September 2014.

By Jun Ota Staff Writer

Copyright © 2015 JCN. All rights reserved. A division of Japan Corporate News Network KK.

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