Control of the azimuthal orientation of grains in polycrystalline Si films
2012
Multi-directional
ion beamirradiation is applied to control the crystal orientation of Si thin films during growth via
plasma-enhanced chemical vapor deposition. The primary
ion beamis generated by
electron cyclotron resonanceusing an SiH4/H2 mixture, and the auxiliary beam is obtained by redirecting a portion of the primary beam with a metal reflector. These two beams simultaneously hit the surface of the growing film from different directions. With this arrangement, we succeeded in controlling the orientation of the growth of deposited Si grains in virtually the same direction.
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