Since {HEAD ~ the crosslinking} is stronger at {TAIL ~ the top} and the dissolution rate is quicker at the bottom, the developing process 22 forms the polyimide isolating wall 36 with a reverse trapezoid cross section 
Since { HEAD ~ the crosslinking } is stronger at { TAIL ~ the top } and the dissolution rate is quicker at the bottom , the developing process 22 forms the polyimide isolating wall 36 with a reverse trapezoid cross section
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH