Patent ID: 8778785

Claim:
A process for forming a layer of electroactive material, comprising: providing a workpiece having at least one active area; depositing a liquid composition comprising the electroactive material in a liquid medium onto the workpiece in the active area, to form a wet layer, wherein the liquid medium comprises at least two liquid components, and at least one component has a boiling point of greater than 100° C.; treating the wet layer on the workpiece at a controlled temperature in the range of 30-60° C., at a pressure in the range of 10 −2 to 1 Torr, for a first period of 5-15 minutes, to form a partially dried layer; heating the partially dried layer to a temperature above 100° C. for a second period of 1-50 minutes to form a dried layer, wherein the dried layer has a substantially flat profile in the active area.