Abstract
Post-RIE cleaning processes after the dry gate recess etching step of lattice-matched InGaAs/InAlAs/InP-HEMTs using an oxygen plasma treatment of the surface followed by various wet chemical steps have been investigated. The treated surfaces have been analyzed using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). In addition, the electrical characteristics have been assessed by DC and microwave measurements of HEMT devices. A considerable improvement of the surface quality using post-RIE cleaning has been observed, resulting in better electrical device performance.
Original language | English |
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Pages (from-to) | 67-70 |
Number of pages | 4 |
Journal | Microelectronic Engineering |
Volume | 35 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 1 Jan 1997 |