{HEAD ~ The object} of the present invention is to provide {TAIL ~ a method} of forming a polyimide isolating wall with a reverse trapezoid cross section that possesses electric, thermal and mechanical stability and thereby improves the quality and lifetime of an OEL display panel 
{ HEAD ~ The object } of the present invention is to provide { TAIL ~ a method } of forming a polyimide isolating wall with a reverse trapezoid cross section that possesses electric , thermal and mechanical stability and thereby improves the quality and lifetime of an OEL display panel
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