This communicationdealswiththechemicaleffectofoxidizerconcentrationandpH-valueonthe
Material RemovalRateinChemicalMechanicalPolishingofsiliconwafers.Thelappingprocessis
necessary toreducetheinitialelevatedroughnessinas-cutsamples.Anoptimallappingappliedpressure
of 27kPawasselectedtobeusedwiththeoptimalabrasiveparticlesizeofAl2O3 3 mm. Then,polishing
process iscarriedouttoobtainawell finished surface.Twoabrasiveswereused,Al2O3 and CeO2(ceria),
but onlyceriaslurrywaschosenduetotheresultinglowerMRRvalue.TheCMPwascarriedoutin
alkaline slurryusingceriaparticleswithOxones and K2S2O8 as oxidizers,usingH2O2 as areference.The
interactionbetweenceriaparticlesandsilicateionswasstudiedinordertofurtherunderstandtheCMP
mechanism ofsiliconsamplesusingceriaslurryandoxidizer.Theresultsindicatethattheuseofan
oxidizerimprovesthepolishingqualityresultinginalowerroughnessandMRRvalue.