| 摘要 |
<p>951,348. Dendritic crystals. WESTING- HOUSE ELECTRIC CORPORATION. Dec. 12, 1961 [Dec. 30, 1960], No. 44433/61. Addition to 913,678. Heading B1S. In pulling a dendritic crystal upwards from a super-cooled melt using a seed crystal having three interior twin planes and orientated as shown in Fig. 2, the outer planes are spaced from the inner plane respective distances (A and B) of 0À1-30 and 0À1-0À5 microns. Both distances are preferably 0À25-0À5 microns. Pulling may be at a rate of more than one inch per minute. Gallium arsenide may be pulled in an atmosphere of arsenic with electric heating to prevent condensation thereof.</p> |
