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Design of Cell-Patterns for Large-Sized Window Unified Touch Screen Panels with High Sensitivity

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We examined the effect of cell-pattern shapes on the touch sensitivity of large-sized window-unified capacitive-type touch screen panels. We constructed 3 × 3 touch cell structures with a 1 μm-thick transparent electrode, 1.5 μm-thick insulator and a 1 μm-thick metal bridge, and analyzed the capacitance changes on the pattern shape, dummy area and bridge width by using Q3D extractor. In order to increase the capacitance change, we investigated three types of cell patterns (cross-polygon, cross-bar, cross-square), which showed a capacitance change of 3.3% in the cross-polygon pattern, 5.2% in the cross-bar one, and 5.5% in the cross-square one, respectively. After modifying the dummy patterns, the cross-square pattern had the high capacitance change of 19.2%, as compared with that of 5.8% in the typical diamond pattern. Finally, we fabricated a 24 inch capacitive-type G2 TSP with a less than 1 mm accuracy and a five multi-touch performance maintaining high sensitivity.

Keywords: Capacitance Change; Cross-Square Pattern; Diamond Pattern; Q3D Extractor; Window-Unified Capacitive-Type Touch Screen Panel

Document Type: Research Article

Affiliations: 1: Electronics and Telecommunications Research Institute (ETRI), Daejeon 34129, Korea 2: Department of Electrical and Electronics Engineering, Chung-Ang University, Seoul 06911, Korea

Publication date: November 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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