Techniques for edge management of printed layers in the fabrication of a light emitting device

A method of producing a permanent layer of a light emitting device, the permanent layer to have a predetermined thickness and to be formed on a first portion of a substrate and not on a second portion of the substrate, the method comprising:

• obtaining a first value, the first value corresponding to a first volume of liquid per unit area and a first thickness, wherein the liquid comprises an organic monomer;
• determining a second value according to a relationship between the first thickness and the predetermined thickness;
• printing droplets of the liquid onto the first portion to deposit a second volume of the liquid per the unit area, the second volume dependent on the second value, the droplets to coalesce following the printing to provide a continuous coat of the liquid within the unit area;
• and
• curing the continuous coat so as to convert the organic monomer into a polymer, to form the layer having the predetermined thickness on the first portion;
• wherein the method further comprises printing a third volume of droplets of the liquid onto a third portion of the substrate that is in between the first portion and the second portion, the third volume dependent upon an adjustment value and at least one of the first value or the second value;
• and
• wherein curing comprises curing the liquid printed onto the third portion to form part of the permanent layer.

A method of producing a permanent layer of a light emitting device, the permanent layer to have a predetermined thickness and to be formed on a first portion of a substrate and not on a second portion of the substrate, the method comprising:

• obtaining a first value, the first value corresponding to a first volume of liquid per unit area and a first thickness;
• determining a second value according to a relationship between the first thickness and the predetermined thickness;
• printing droplets of the liquid onto the first portion to deposit a second volume of the liquid per the unit area, the second volume dependent on the second value, the droplets to coalesce following the printing to provide a continuous coat of the liquid within the unit area;
• and
• curing the continuous coat so as to form the layer having the predetermined thickness on the first portion;
• wherein
• printing the droplets onto the first region comprises printing the droplets onto the first region within a controlled atmosphere,
• the method further comprises, within the controlled atmosphere, printing a third volume of droplets of the liquid onto a third portion of the substrate that is in between the first portion and the second portion, the third volume dependent upon an adjustment value and at least one of the first value or the second value, and
• curing the continuous coat is performed within the controlled atmosphere and comprises curing the liquid printed onto the third portion to form part of the permanent layer.