Ar. Massengale et al., LOCALIZED IMPURITY-INDUCED LAYER DISORDERING FOR LITHOGRAPHIC CONTROLOF THE LATERAL OXIDATION OF ALAS, Electronics Letters, 33(12), 1997, pp. 1087-1089
The lateral oxidation of AlAs is becoming an important processing tool
, but has proven difficult to control. A method is presented to achiev
e lithographic control of the lateral oxidation process. The technique
uses impurity induced layer disordering in buried, heavily Si-doped l
ayers to locally change the oxidation rate of an AlAs layer. Several t
ypes of capping conditions during the anneal are discussed.