Light emitter devices and components with improved chemical resistance and related methods
View Patent ↗Light emitter devices, components and methods are disclosed. In one aspect, a light emitter component of a light emitter device is disclosed. The light emitter component can include a silver (Ag) portion at least partially disposed over a surface of the component. The component can further include a protective layer at least partially disposed over the Ag portion, the protective layer at least partially including an organic barrier material that increases or improves chemical resistance of the Ag portion. In some aspects, the protective layer includes a polyxylylene (e.g., poly(p-xylylene), a substituted poly(p-xylylene), a fluorocarbon containing poly(p-xylylene), and/or any other polymer prepared from a xylylene and/or comprising —CH 2 —(C 6 H 4 )—CH 2 — based repeating units. In some aspects, the protective layer includes Parylene.
1. A component of a light emitter device, the component comprising:
a silver (Ag) portion at least partially disposed over a surface of the component;
one or more light emitter chips disposed over the Ag portion, wherein the Ag portion is configured to reflect light from the one or more light emitter chips; and
two or more protective layers disposed over the Ag portion, each of the two or more protective layers comprising an organic barrier material configured to block chemical complexes from contacting the Ag portion to increase chemical resistance of the Ag portion, wherein the two or more protective layers are disposed between a first layer of encapsulant and a second layer of encapsulant, and wherein the two or more protective layers are in contact with the first and second layers of encapsulant,
wherein the two or more protective layers comprise a polyxylylene, poly(p-xylylene), a substituted poly(p-xylylene), a fluorocarbon containing poly(p-xylylene), a polymer prepared from a xylylene, or a polymer comprising —CH 2 —(C 6 H 4 )—CH 2 — based repeating units.
2. The component of claim 1 , wherein the two or more protective layers comprise a polymer with repeating units comprising an alkyl or aryl group substituent.
3. The component of claim 1 , wherein the two or more protective layers comprise a polymer with repeating units comprising a halogen substituent.
4. The component of claim 1 , wherein the two or more protective layers comprise a polymer, and wherein some or substantially all of a plurality of aromatic rings derived from a xylylenic polymer precursor species have been converted to cyclic or non-cyclic non-aromatic groups.
5. The component of claim 1 , wherein the two or more protective layers comprise poly(p-xylylene), poly(p-2-chloroxylylene), poly(p-2,6-dichloroxylylene) and fluoro-substituted poly(p-xylylene).
6. The component of claim 1 , wherein the two or more protective layers comprise a layer of Parylene or a variation of such polymer family.
7. The component of claim 1 , wherein the two or more protective layers comprise a thickness between approximately 1 nm to approximately 100 μm.
8. The component of claim 7 , wherein the two or more protective layers comprise a thickness between approximately 0.5 μm to approximately 1 μm.
9. The component of claim 1 , wherein the Ag portion comprises a Ag-containing substrate.
10. The component of claim 9 , wherein the one or more light emitter chips comprises one or more light emitting diode (LED) chips, and wherein the one or more LED chips is at least partially disposed between the two or more protective layers and the Ag-containing substrate.
11. The component of claim 9 , wherein the first layer of encapsulant is at least partially disposed between the two or more protective layers and the Ag-containing substrate.
12. The component of claim 1 , wherein at least one of the first and second layers of encapsulant comprises phosphor.
13. The component of claim 9 , wherein a layer of material is disposed between the two or more protective layers and the Ag-containing substrate.
14. The component of claim 1 , wherein the two or more protective layers are of a uniform or non-uniform thickness.
15. The component of claim 9 , wherein the component is incorporated within a surface mount device (SMD) type light emitter device.
16. The component of claim 1 , wherein the two or more protective layers are configured to prevent the Ag portion from tarnishing, corroding, darkening and/or degrading from exposure to chemical complexes.