Optoelectronic chip-on-board module
A method is provided for coating an optoelectronic chip-on-board module, including a flat substrate populated with one or more optoelectronic components, having a transparent, UV-resistant, and temperature-resistant coating made of one or more silicones. A corresponding optoelectronic chip-on-board module and a system having multiple optoelectronic chip-on-board modules are also provided. The method includes the following steps: a) preheating the substrate to be coated to a first temperature; b) applying on the preheated substrate a dam that encloses a surface area or partial area of the substrate to be coated, the dam being made of a first, heat-curable, highly reactive silicone that cures at the first temperature; c) filling the surface area or partial area of the substrate enclosed by the dam with a liquid second silicone; and d) curing the second silicone.
1. An optoelectronic chip-on-board module comprising:
a flat substrate populated with at least one optoelectronic component; and
a transparent, UV-resistant, and temperature-resistant coating comprising:
a dam enclosing at least a partial surface of the flat substrate, the dam comprising a cured, highly reactive first silicone which partially covers a plurality of lateral surfaces and a portion of a top surface of the at least one optoelectronic component, and
a liquid second silicone filled in and cured in the at least partial surface area enclosed by the dam on the flat substrate, the second silicone covering portions of the plurality of lateral surfaces and a remaining portion of the top surface of the at least one optoelectronic component,
wherein the first silicone and the second silicone are transparent to light that emits from the at least one optoelectronic component.
2. The optoelectronic chip-on-board module according to claim 1 , wherein the dam runs at least in some sections to an edge of the flat substrate.
3. The optoelectronic chip-on-board module according to claim 1 , wherein the cured first silicone and the second silicone comprise the same silicone.
4. The optoelectronic chip-on-board module according to claim 3 , wherein the cured first silicone and the second silicone have, in a cured state, the same optical properties with regard to at least one of transparency, color, and refractive index.
5. The optoelectronic chip-on-board module according to claim 1 , wherein the flat substrate is populated with optoelectronic components up to an edge or up to shortly before an edge of the flat substrate.
6. A system comprising at least two optoelectronic chip-on-board modules according to claim 1 , wherein adjacent flat substrates of the optoelectronic chip-on-board modules have edges arranged flush with each other, and wherein the adjacent flat substrates are populated with optoelectronic components up to the flush edges, such that a regular arrangement and spacing of optoelectronic components results, even across boundaries between the adjacent flat substrates.