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