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    • 4. 发明授权
    • Method of growing single crystal silicon by the Czochralski method which
eliminates the need for post growth annealing for resistivity
stabilization
    • 通过Czochralski法生长单晶硅的方法,其消除了对电阻率稳定化的后生长退火的需要
    • US4140570A
    • 1979-02-20
    • US417437
    • 1973-11-19
    • Frederic W. VoltmerThomas G. Digges, Jr.
    • Frederic W. VoltmerThomas G. Digges, Jr.
    • C30B15/00C30B15/14H01L21/322B01J17/18C01B33/02
    • C30B29/06C30B15/14C30B15/206H01L21/3221
    • This disclosure relates to a technique of improving the quality of crystals grown by the Czochralski method by substantially eliminating the formation of electrically active oxygen complexes during growth. The oxygen which forms these complexes is liberated from the quartz liner which contains the silicon melt. It has been found that electrically active oxygen complexes (oxygen donors) are formed in the silicon lattice during crystal growth when the crystal is in the range of 300-500.degree. C. Above and below this temperature range, the formation of oxygen donors in the silicon lattice is minimal. The crystal is therefore maintained in its entirety above the temperature of 500.degree. C. and then is quenched to be quickly brought below the 300.degree. C. level. In this way, the silicon crystal is in the 300.degree. C. to 500.degree. C. range for a minimal period of time, thereby minimizing the amount of oxygen donor formation in the silicon lattice during growth. The quenching can take place along the entire rod after it has been pulled, or it can take place on a zone basis along the rod after it is moved away from the melt.
    • 本公开涉及通过在生长期间基本上消除电活性氧络合物的形成来提高通过切克劳斯基法生长的晶体的质量的技术。 形成这些络合物的氧从含有硅熔体的石英衬垫中释放出来。 已经发现,当晶体在300-500℃的范围内时,在晶格生长期间,在硅晶格中形成电活性氧络合物(氧供体)。在该温度范围之上和之下,在 硅晶格最小。 因此,晶体整体保持在500℃以上,然后淬火以迅速降至300℃以下。 以这种方式,硅晶体在300℃至500℃的范围内处于最短的时间段内,从而使生长期间硅晶格中氧供体形成的量最小化。 淬火可以在整个拉杆被拉扯之后发生,或者它可以沿着杆沿着该棒移动离开熔体后沿区域发生。