Dennis R. Freeman

27.2: Linear Source Deposition of Organic Layers for Full-Color OLED

A key requirement for fabrication of organic light emitting diode (OLED) displays is uniform film deposition over large areas because of the sensitivity of emission color and efficiency on film thickness. Conventional deposition using point sources is unattractive because of the requirement of a large source to substrate separation, usually with substrate rotation, to achieve acceptable thin film uniformity. By translating a novel extended linear evaporation source in a single direction, film non-uniformity of less than 5% has been demonstrated over a 300 mm × 400 mm substrate with a source to substrate separation of 100 mm. OLEDs with all organic layers deposited using linear sources have been determined to operate identically to devices fabricated using conventional point sources. The performance of doped and undoped devices as well as the advantages of linear source deposition over conventional deposition techniques will be described.

41.4: New Capabilities in Vacuum Thermal Evaporation Sources for Small Molecule OLED Manufacturing

A vacuum thermal evaporation source has been developed where blended or single-component organic materials are metered from a cooled reservoir to a heating element. High material utilization, very high deposition rates, and multicomponent deposition with precise composition control are features of this vaporization-on-demand source.

36.1: Invited Paper: Cost Competitive Vacuum Deposition Technology for Small Molecule OLED Manufacturing

This paper will discuss how the unit manufacturing cost of AMOLED displays can be reduced by as much as 40% through the use of a flash vaporization source first presented at SID 2006. This cost reduction is achieved principally through higher materials utilization and higher productivity.

Salt bath test for assessing the adhesion of silver to poly(ethylene terephthalate) web

A time-resolved salt bath technique was employed for assessing the adhesion of silver coatings on poly(ethylene terephthalate) (PET) web. Furthermore, a basis for quantitative comparisons of adhesion was developed. The salt bath test was applied to samples of silver on PET web, made with a variety of web surface treatments. The results of the salt bath test demonstrate that the technique is capable of distinguishing levels of adhesion and, therefore, levels of treatment. It is thus shown that the salt bath test can be used to study the effects of treatment and coating process parameters on the adhesion of silver coatings to PET substrates. Although the test is specifically applied to the case of silver on PET, the concepts of a time-resolved soak test are generally applicable to systems that are known to exhibit delamination when exposed to certian chemical agents or harsh environments.