Method to optimize polymer film spin coating for polymer LED displays

Research and development of displays and image sensors based on semiconduct ing polymers require design of new polymer materials and evaluation of film properties. Application of statistical methods can expedite process develo pment, Optimizing device performance entails determining the effect of seve ral process parameters, necessitates numerous samples, and may consume more scarce new material than desired. Uniform film thickness, with no voids, p inholes, inhomogeneities, or particulate contamination across the substrate can improve display efficiency and uniformity. After performing and analyz ing a two-cubed full-factorial experiment with three replicated center poin ts, this paper concludes that spin velocity and polymer concentration have statistically significant effects on film thickness, film uniformity, and d evice efficiency. Ramp acceleration does not. Analysis of variance methodol ogy determines the effect of the three spin coating factors and their two-w ay interactions.