Improved techniques for growth of large-area single-crystal Si sheets over SiO2 using lateral epitaxy by seeded solidification

Abstract
Continuous single‐crystal Si sheets over SiO2 with areas of several square centimeters have been produced from poly‐Si films by the LESS technique (lateral epitaxy by seeded solidification). Seeding is achieved either with a narrow stripe opening in a recessed SiO2 layer on a single‐crystal Si substrate or with an external single‐crystal Si seed. N‐channel metal‐oxide‐semiconductor field‐effect transistors (MOSFET’s) fabricated in these films exhibit surface electron mobilities as high as 700 cm2/V s.