Devices and structures bonded by inorganic coating
An inorganic coating may be applied to bond optically scattering particles or components. Optically scattering particles bonded via the inorganic coating may form a three dimensional film which can receive a light emission, convert, and emit the light emission with one or more changed properties. The inorganic coating may be deposited using a low-pressure deposition technique such as an atomic layer deposition (ALD) technique. Two or more components, such as an LED and a ceramic phosphor layer may be bonded together by depositing an inorganic coating using the ALD technique.
1. A method comprising:
depositing a plurality of luminescent particles onto a component to form a film comprising multiple layers of the luminescent particles, the luminescent particles configured to absorb light of a first wavelength and in response emit light of a second wavelength; and
depositing an inorganic coating onto the plurality of luminescent particles using a low pressure deposition technique, the inorganic coating bonding the plurality of luminescent particles to each other and to the component.
2. The method of claim 1 , wherein the inorganic coating is an oxide coating.
3. The method of claim 1 , wherein the plurality of luminescent particles are deposited on the component using a technique of one of sedimentation, electrophoresis, stenciling, and dispensing.
4. The method of claim 1 , wherein the luminescent particles are phosphor particles.
5. The method of claim 1 , wherein the luminescent particles are quantum dots.
6. The method of claim 1 , wherein the low-pressure deposition technique is an atomic layer deposition technique.
7. The method of claim 1 , wherein the component is a light emitting device configured to emit light at the first wavelength.
8. The method of claim 7 , wherein the light emitting device is a laser diode or an LED.
9. The method of claim 1 , wherein the inorganic coating comprises a plurality of layers.
10. The method of claiml, wherein an inorganic coating coefficient of thermal expansion is substantially matched to a coefficient of thermal expansion of the plurality of luminescent particles or of the component.
11. The method of claim 1 , wherein an inorganic coating index of refraction is substantially matched to an index of refraction of the plurality of luminescent particles or of the component.
12. The method of claim 1 , further comprising depositing a reflective film or a filtering film.
13. The method of claim 1 , wherein the component is a componen of an automobile headlight, a camera flash, or a display.
14. A method comprising:
roughing a surface of a first component or forming grooves in a surface of a first component;
depositing an inorganic coating onto the surface of the first component using a low- pressure deposition technique; and
bonding the first component with a second component, the inorganic coating facilitating the bonding of the first component with the second component.
15. The method of claim 14 , wherein the first component comprises a light emitting layer and wherein the second component comprises a ceramic phosphor layer.
16. A method comprising:
depositing a plurality of optically scattering particles onto a component;
depositing an inorganic coating onto the plurality of optically scattering particles usin; a low-pressure deposition technique; and
removing at least a portion of the component such that an excitation may be received at a first surface of the first three dimensional film and a light may be emitted from a second surface of the first three dimensional film.