Dislocation-free Czochralski silicon crystal growth without the dislocation-elimination-necking process

Dislocation-free silicon crystals have been grown successfully from heavily -boron-doped silicon melts by the Czochralski method without the dislocatio n-elimination-necking process (Dash neck). A dislocation-free silicon seed of (001) orientation with a boron concentration of about 4 x 10(19) atoms/c m(3) was used to grow a silicon crystal with the same boron concentration. No dislocation was generated in the seed during the dipping process, and no misfit dislocation occurred in the grown crystal. These results show that shoulder and body growth call be started immediately after the seeding proc ess.