We have developed 1-μm gate-length the devices of In0.65 Ga0.65 As pseudomorphic channel (PC) on the In0.5 Al0.5 As metamorphic buffer layer to improve the device performance, as compared with the In0.5 Ga0.5 As lattice matched ones. The dc maximum drain-to-source current and transconductance enhances from 340 to 490 mA/mm and from 450 to 670 mS/mm. The RF current gain cut-off frequency and maximum oscillation frequency increases from 22 to 31 GHz and from 42 to 58 GHz, respectively. The extrinsic total delay times are quantitatively investigated, and the effective velocity of electrons improves from 1.8 × 107 cm/s to 2.3 × 107 cm/s by this In0.65 Ga0.35 As PC.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering