Selective growth of InP buried structure by chloride vapor phase epitaxy

Hoshino, Masataka; Tanaka, Kazuhiro; Komeno, Junji; Kitahara, Kuninori; Kodama, Kunihiko; Ozeki, Masashi
January 1986
Applied Physics Letters;1/13/1986, Vol. 48 Issue 2, p186
Academic Journal
Selective growth of an InP buried layer by In/PCl3/H2 vapor phase epitaxy was developed for buried layer GaInAsP/InP long wavelength laser diodes. For the first time, a completely flat-surface buried layer was grown into grooves with good morphology on a (100) exactly oriented InP substrate, but not on a (100) 2° off oriented substrate. We found that the side of the groove was covered with a buried InP layer in the early stage of epitaxial growth. Therefore, the present selective growth would be effective for the protection of the interface between the active and buried layers from thermal degradation. The resistivity of InP, measured by using an n-i-n structure, was found to be higher than 103 Ω cm at room temperature, which is sufficient for the buried layer of an usual laser diode.


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