▁emer ging . ▁▁ ▁Mic r one ed les ▁are ▁constructed ▁through ▁various ▁methods ▁usually ▁involving ▁phot ol ith ographic ▁processes ▁or ▁mic rom old ing . ▁These ▁methods ▁involve ▁et ch ing ▁micro scop ic ▁structure ▁into ▁res in ▁or ▁sil icon ▁in ▁order ▁to ▁cast ▁mic r one ed les . ▁Mic r one ed les ▁are ▁made ▁from ▁a ▁variety ▁of ▁material ▁r anging ▁from ▁sil icon , ▁tit an ium , ▁st ain less ▁steel , ▁and ▁polym ers . ▁Some ▁mic r one ed les ▁are ▁made ▁of ▁a ▁drug ▁to ▁be ▁delivered ▁to ▁the ▁body ▁but ▁are ▁sh aped ▁into ▁a ▁need le ▁so ▁they ▁will ▁pen et rate ▁the ▁skin . ▁The ▁mic r one ed les ▁range ▁in ▁size , ▁shape , ▁and ▁function ▁but ▁are ▁all ▁used ▁as ▁an ▁alternative ▁to ▁other ▁delivery ▁methods ▁like ▁the ▁conventional ▁hyp od erm ic ▁need le ▁or ▁other ▁injection ▁appar atus . ▁▁ ▁Mic r one ed les ▁are ▁usually ▁applied ▁through ▁small ▁arrays . ▁The ▁arrays ▁used ▁are ▁a ▁collection ▁of ▁mic r one ed les , ▁r anging ▁from ▁only ▁a ▁few ▁mic r one ed les ▁to ▁several ▁hundred , ▁applied ▁to ▁an ▁applic ator ▁sometimes ▁a ▁patch ▁or ▁other ▁solid ▁stamp ing ▁device . ▁The ▁arrays ▁are ▁applied ▁to ▁the ▁skin ▁of ▁patients ▁and ▁are ▁given ▁time ▁to ▁allow ▁for ▁the ▁effective ▁administration ▁of ▁dru gs . ▁Mic r one ed les ▁are ▁an ▁easier ▁method ▁for ▁phys icians ▁as ▁they ▁require ▁less