An all-plastic, full-color LTPS TFT LCD has been fabricated with practical image quality. The diagonal size is 1.5 inch with a panel thickness of only 0.4mm. The TFT layer on a plastic substrate was prepared with a newly developed transfer process, which does not cause any significant damage to the device layer. This technology will lead to a lightweight, shock-resistant LCD panel suitable to mobile applications.

An all‐plastic, reflective color LTPS TFT LCD has been developed with a typical PDA‐size of 3.8‐inch in diagonal. This panel has 0.4mm in thickness and weighs only three grams. The TFT layer on a plastic substrate was prepared in our original transfer process, which does not leave any significant damage to the device layer. Owing to the flexibility of the substrates, the panel can be bent with an image displayed in operation. The changes in LTPS TFT characteristics with a substrate bending are also investigated for the first time, which reveals a mobility change of 16% under 0.75% compression. This technology will allow us to make a lightweight, shock‐resistant LCD panel practically, which is well suited to mobile applications.

The reliability of top-gate oxide thin-film-transistors on a polyimide substrate correlates with the volume resistivity of the polyimide substrate. Hence, the polyimide used as a TFT substrate should have a high resistivity of 3×10 17 ohm-cm or more to ensure high TFT reliability equal to the TFT on a glass substrate.