Method of forming {HEAD ~ a polyimide isolating wall} of reverse trapezoid cross section with {TAIL ~ electric, thermal and mechanical stability} 
with
Method of forming { HEAD ~ a polyimide isolating wall } of reverse trapezoid cross section with { TAIL ~ electric , thermal and mechanical stability }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL