Organic electroluminescence display and method of producing same

An organic electroluminescence display comprising:

• a drive circuit formed on a substrate;
• a planarization film formed on the drive circuit;
• a lower electrode formed on the planarization film;
• a device separation film formed on the lower electrode;
• an organic compound layer formed on the device separation film and including a light emission layer;
• and
• an upper electrode formed on the organic compound layer,
• wherein at least one of the planarization film and the device separation film comprises a polyimide film having an imidation ratio in a range of 65% or more to less than 90%.

A method of producing an organic electroluminescence display comprising the steps of:

• forming a lower electrode on a substrate;
• forming a device separation film on the lower electrode;
• forming an organic compound layer including a light emission layer on the device separation film;
• and
• forming an upper electrode on the organic compound layer, wherein:
• the step of forming a device separation film comprises applying a polyimide precursor solution mainly composed of a polyamic acid, pre-baking the applied solution to form a polyimide precursor film, and post-baking the polyimide precursor film to form a polyimide film;
• a rate of temperature increase up to a pre-baking maximum ultimate temperature is 8° C./min or less;
• and
• a post-baking maximum ultimate temperature is in a range of a glass transition temperature of the polyimide film or more to less than +40° C. of the glass transition temperature.

A method of producing an organic electroluminescence display comprising the steps of:

• forming a drive circuit on a substrate;
• forming a planarization film on the drive circuit;
• forming a lower electrode on the planarization film;
• forming a device separation film on the lower electrode;
• forming an organic compound layer including a light emission layer on the device separation film;
• and
• forming an upper electrode on the organic compound layer, wherein:
• at least one of the step of forming a planarization film and the step of forming a device separation film comprises applying a polyimide precursor solution mainly composed of a polyamic acid, pre-baking the applied solution to form a polyimide precursor film, and post-baking the polyimide precursor film to form a polyimide film;
• a rate of temperature increase up to a pre-baking maximum ultimate temperature is 8° C./min or less;
• and
• a post-baking maximum ultimate temperature is in a range of a glass transition temperature of the polyimide film or more to less than +40° C. of the glass transition temperature.

A method of producing an organic electroluminescence display having a plurality of organic electroluminescence devices comprising the step of;

• forming a plurality of lower electrodes on a substrate, forming a material of device separation film on a surface of said substrate having said plurality of lower electrodes,
• forming apertures by removing the material above said plurality of lower electrodes, pre-baking said material of device separation film having said apertures,
• post-baking said pre-baked material of device separation film having said apertures, wherein said pre-baking step, a ratio of temperature increase up to a pre-baking maximum ultimate temperature is 8° C./min or less, and
• wherein said post-baking step, a post-baking maximum ultimate temperature is in a range of a glass transition temperature of polyimide film to a temperature which is less than +40° C. of the glass transiton temperature.