Abstract
A new flexible substrate for flexible electronics has been developed. The developed substrate consists of an ultra thin glass and TAC (triacethyl cellulose) film. An ultra thin glass and TAC film were joined with TEOS-DAC (TEOS: tetraethyl orthosilicate, DAC: diacethy cellulose) adhesive resin synthesized by sol-gel method by means of thermo-compression bonding. This substrate has high transparency in visible-light region (90%), high flexibility (torsion strength and bending strength) and high gas barrier characteristics due to an ultra thin glass. The newly-developed substrate is superior to the substrates fabricated with commercially available adhesive resin in the same way in characteristics of heat resistance, transparency and flexibility.
Highlights
IntroductionDevelopment of electronics-related products (such as solar cells) and portable information de-How to cite this paper: Ohishi, T., Kawada, H., Yoshida, T. and Ohwada, T. (2015) Development of a High-Performance Flexible Substrate for Flexible Electronics: Joining TAC Films and an Ultra-Thin Glass by Using TEOS-diacetyl cellulose (DAC) Synthesized by the Sol-Gel Method
In recent years, development of electronics-related products and portable information de-How to cite this paper: Ohishi, T., Kawada, H., Yoshida, T. and Ohwada, T. (2015) Development of a High-Performance Flexible Substrate for Flexible Electronics: Joining TAC Films and an Ultra-Thin Glass by Using TEOS-diacetyl cellulose (DAC) Synthesized by the Sol-Gel Method
How to cite this paper: Ohishi, T., Kawada, H., Yoshida, T. and Ohwada, T. (2015) Development of a High-Performance Flexible Substrate for Flexible Electronics: Joining TAC Films and an Ultra-Thin Glass by Using TEOS-DAC Synthesized by the Sol-Gel Method
Summary
Development of electronics-related products (such as solar cells) and portable information de-How to cite this paper: Ohishi, T., Kawada, H., Yoshida, T. and Ohwada, T. (2015) Development of a High-Performance Flexible Substrate for Flexible Electronics: Joining TAC Films and an Ultra-Thin Glass by Using TEOS-DAC Synthesized by the Sol-Gel Method. As next-generation representatives of such products, flexible devices [1]-[4], such as flexible displays [5]-[7] and electronic paper [8] (characterized by thinness, lightness, and bendability) and flexible solar cells, are continuing to be developed. As for a flexible substrate, an organic polymer film with flexibility is generally used; a normal organic film functions poorly as a “gas-barrier” in regard to water vapor, oxygen, etc., and the resulting degradation of performance due to oxidation of the device components fabricated on a flexible substrate has become a big problem. The required performance of a substrate for electronics use is strict; namely, water-vapor permeability must be less than 10−2 g/m2 day in the case of a liquid-crystal device (LCD) and less than 10−5 to 10−6 g/m2 day in the case of an organic electroluminescence (EL) display [11] [12]
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