Method for p-type doping of semiconductor structures formed of group II and group VI elements
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United States of America Patent
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Mar 21, 1995
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app pub date -
Jul 27, 1993
filing date -
Jul 27, 1993
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Abstract
A method and apparatus (10) for forming a p-doped layer (68, 80, 92) of Group II and Group VI elements by molecular beam epitaxial process in which a nitrogen dopant is introduced as the layer (68, 80, 92) is being grown. In one embodiment, molecular nitrogen is passed through a plasma generator (46) for converting it to activated nitrogen, and the activated nitrogen is conducted through an elongated guide tube (50) toward the substrate (66) upon which a Group II-Group VI layer (68, 80, 92) is being grown. In one embodiment, an n-type dopant source (72) is also provided, the apparatus (10) being operable for forming electrical devices (86, 88) having successive layers (78, 80, 90, 92, 94) of differing electrical characteristics.
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