| 摘要 |
<p>The apparatus comprises two sealed, concentric enclosures having the same axis as the revolving seed crystal and its carriage. The central enclosure serves as the means of vertically drawing the crystal, and the outer enclosure for vapour phase renewal of at least one component of the crystal soluble in the solvent composition contained in this enclosure. The two enclosures are joined by an annular passage below the level of their common interior wall which pref. forms a double-walled space to maintain a temp. differential between the enclosures to feed and remove gas. Large dimensioned, single crystal semiconductors are produced as homogeneous and regular material.</p> |
