M. Vangbo et Y. Backlund, TERRACING OF (100)SI WITH ONE MASK AND ONE ETCHING STEP USING MISALIGNED V-GROOVES, Journal of micromechanics and microengineering, 6(1), 1996, pp. 39-41
By using narrowly spaced V-grooves slightly misaligned to the [110]-di
rection, multilevel terracing can be obtained using one mask and one w
et etching step only. Etching in the vertical direction is locally del
ayed until the ridges between the V-grooves are fully underetched. The
method is demonstrated in KOH and TMAH (tetramethyl ammonium hydroxid
e) etchants and the dependence of angular misalignment on height and s
urface smoothness are investigated.