[en] We report on the fabrication of MOS capacitors on 200 mm virtual GaAs substrates using a Si CMOS processing environment. The fabricated capacitors were comparable to those processed on bulk GaAs material. Topside contact was made to the GaAs using a novel CMOS compatible self-aligned NiGe contact scheme resulting in a measured contact resistance of 0.26 [ohm sign].cm. Cross-contamination from various III-V substrates was investigated and it was found that by limiting the thermal budget to <= 300C cross-contamination from the outgassing of In, Ga and As could be eliminated. For wet processing the judicious choice of recipe and processing conditions resulted in no significant cross-contamination being detected as determined by TXRF monitoring. This achievement enables III-V device production using state-of-the-art Si processing equipment.
Disciplines :
Physics
Author, co-author :
Waldron, Niamh; IMEC
Nguyen, Ngoc Duy ; Université de Liège - ULiège > Département de physique > Physique des solides, interfaces et nanostructures
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