Jb. Shealy et al., STUDY OF OHMIC CONTACT RESISTANCE TO GA(1-X)IN(X)AS INP COMPOSITE CHANNEL INP HIGH-ELECTRON-MOBILITY TRANSISTORS FOR X=35-PERCENT TO X=81-PERCENT/, Journal of vacuum science & technology. B, Microelectronics and nanometer structures processing, measurement and phenomena, 15(5), 1997, pp. 1773-1774
This article reports the performance of alloyed Ohmic contacts to Ga(1
-X)In-(X)As/InP composite channel InP high electron mobility transisto
rs for various indium compositions, from X=35% to X=81%. Both strained
and pseudomorphic structures were utilized to observe the impact of t
he indium concentration on electron mobility, carrier concentration, s
heet resistance, and specific contact resistance. The lowest specific
contact resistance (Rt<0.16 Ohm mm) was obtained for strained structur
es with indium concentrations of 74% and 81%. For strained structures
with indium concentrations of 35%, we observe specific contact resista
nce of 0.35 Ohm mm. (C) 1997 American Vacuum Society. [S0734-211X(97)0
2105-7].