Shoichiro Matsumoto

Ultra-low-power polysilicon AMLCD with full integration

An LTPS TFT-LCD that only consumes 0.07 mW of power was developed. It is the worlds first LCD equipped with all the circuits needed to display still images continuously for up to 1 year on a button battery. At the same time, the panel is capable of displaying 260,000-color moving pictures.

Improvement in Surface Morphology and Crystal Epitaxial CaF 2 on Si (100) Through two Mbe Growth Stages

We report the first study on improvement in surface morphology and crystal quality of as—grown epitaxial CaF 2 film on a (100) Si substrate grown through two MBE growth stages without any post-growth treatment. The degree of improvement in surfacemorphology and crystal quality depends not only on the thickness of an initial thin CaF 2 film grown at the early growth stage of 550oC but also on both the subsrate temperature and thickness of a sequential grown CaF 2 film used for thesecond growth stage. Under optimum conditions, the CaF 2 films exhibited high quality with an RBS/channeling minimum yield of 4%, together with a very smooth surface morphology without any other nuclel or cracks.