Method for forming shaped buried layers in semiconductor devices

Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal

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29576E, 29576W, 29578, 29580, 148187, 156647, 156649, 156657, 156662, 357 20, 357 50, 357 56, H01L 2120, H01L 2176

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042513006

ABSTRACT:
A method for forming a shaped buried layer in a semiconductor structure includes the steps of removing a portion of semiconductor material from adjacent the surface of the semiconductor substrate to form an indentation, introducing a dopant into the surface of the indentation to form regions of impurity in the semiconductor substrate, forming a region of epitaxial material on the surface of the indentation, and forming regions of insulating material to surround the epitaxial material.

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patent: 3456169 (1969-07-01), Klein
patent: 3648125 (1972-03-01), Peltzer
patent: 3728166 (1973-04-01), Bardell et al.
patent: 3740276 (1973-06-01), Bean
patent: 3764409 (1973-10-01), Nomura et al.
patent: 4056413 (1977-11-01), Yoshimura
patent: 4089021 (1978-05-01), Sato et al.
patent: 4101350 (1978-07-01), Possley et al.
patent: 4143455 (1979-03-01), Schwabe et al.
Agusta et al., "Monolithic Integrated . . . Base Regions", I.B.M. Tech. Discl. Bull., vol. 9, No. 5, Oct., 1966, pp. 546-547.
Wu, L. L., "Doped P & N Pockets for Complementary FETS".
Ibid., vol. 15, No. 7, Dec., 1972, p. 2279.

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