Silicon Genesis Corporation

Lu Tian

Francois J Henley

Sien G Kang

Zuqin Liu

A method of fabricating a thickness of silicon material includes providing a silicon ingot material having a surface region and introducing a plurality of particles having an energy of about 1-5 MeV through the surface region to a depth to define a cleave region and a thickness of detachable material between the cleave region and the surface region. Additionally, the method includes processing the silicon ingot material to free the thickness of detachable material at a vicinity of the cleave region and causing formation of a free-standing thickness of material characterized by a carrier lifetime about 10 microseconds and a thickness ranging from about 20 microns to about 150 microns with a thickness variation of less than about five percent. Furthermore, the method includes treating the free-standing thickness of material using a thermal treatment process to recover the carrier lifetime to about 200 microseconds and greater.

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Lu Tian