Process and apparatus for seperating silicon wafers, to be used for solar cells, from according to the horizontal ribbon pulling growth method prepared silicon ribbon

摘要

Separating disc-shaped silicon bodies of a manufactured according to the so-called horizontal tape drawing method silicon tape (4), wherein as a carrier body for the material to kristallinisierende silicon, a graphite yarn fabric (1) is used and the crystallization of the molten silicon (2) above and (below the melting tub 3) arranged, matched heat source (7) is caused to takes place in that follower (in certain predetermined intervals L _A) which correspond to the size of the silicon tape sections for the solar cells, the radiation losses (5) (above the melt surface 2) (v₂ v₁ =) shielding (6) to the extent be reduced by localized solidification does not take place and thereby in the silicon tape (4) forms a parting strip (11). The process enables the production of silicon wafers for solar cells in continuous operation.