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Abstract
The world first flexible full color 5.6-inch active matrix organic light emitting diode (AMOLED) display with top emission mode on stainless steel foil is demonstrated. The active matrix back planes were fabricated using low temperature poly-Si (LTPS). The p-channel poly-Si TFTs on the stainless steel foil exhibited the field-effect mobility of 71.2 cm2/Vs, threshold voltage of −2.7 V, off current of 6.7× 1013 A/um, and subthreshold slope of 0.63 V/dec. These TFT performances made it possible to integrate scan driver circuit on the panel. A low-cost planarization techniqe of stainless steel foil was developed to replace the expensive chemical mechanical planarization (CMP) method, which was the most critical barrier against mass production. The full color flexible AMOLED display on the stainless steel foil will be promising for mobile applications because of its thin, light, rugged, and design-free properties.
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