Conference paper

Influence of starin compensation in InAlAs/InGaAs pseudomorphic HEMTs on InP

InAlAs/InGaAs pseudomorphic HEMTs suffer from two drawbacks which can impede their future developments: a mechanical instability of their strained layers and a low breakdown voltage. In this work we study pseudomorphic structures where the channel and the spacer are strain compensated: the InGaAs channel is compressively strained and the InAlAs spacer is tensilely strained. This structure along with a non compensated reference are annealed up to 600 degrees C and photoluminescence measurements show that the compensated structure is more stable than the non compensated one. HEMTs processes on these structures exhibit a higher breakdown voltage on the compensated structure, related to a higher valence band offset.


    • EPFL-CONF-210885

    Record created on 2015-08-31, modified on 2016-08-09


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