Thin film LED
AssigneeLG Electronics Inc.
InventorHyeong Tag Jeon
Life of this patent
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Abstract
Light emitting LEDs devices comprised of LED chips that emit light at a first wavelength, and a tinted thin film layer over the LED chip that changes the color of the emitted light. For example, a blue-light emitting LED chip can be used to produce white light. The tinted thin film layer beneficially consists of ZnSe, CeO2, Al2O3, or Y2O3:Ce that is deposited using a chemical vapor deposition process, such as metal organic chemical vapor deposition (MOCVD), atomic layer chemical vapor deposition (ALD), plasma enhanced MOCVD, plasma enhanced ALD, and/or photo enhanced CVD. Suitable CVD precursors include Alkoxide, β-dikeonate, Metalloscene, Alkys, DMZn, DEZe, H2Se, DMSe, ThuSe, and DESe.
Claims39
A light emitting diode (LED), comprising:
- an LED chip having a first electrical contact and a second electrical contact, wherein the LED chip emits blue light having a first wavelength in response to applied electrical power;
- and
- a yellow thin-film layer over the LED chip;
- wherein the yellow thin-film layer and the blue light interact to form light having a second wavelength.
A method of fabricating a white-light LED, comprising:
- procuring an LED chip that emits blue-light at a first wavelength, wherein the LED chip includes a first electrical contact and a second electrical contact;
- forming a yellow thin-film layer over the LED chip;
- and
- producing light having at least a second wavelength by passing electrical current through the first and second electrical contacts.
A light emitting diode (LED), comprising:
- an LED chip having a first electrical contact and a second electrical contact, wherein the LED chip emits light having a first wavelength in response to an applied electrical power;
- and
- a tinted thin-film layer over the LED chip;
- wherein the tinted thin-film layer interacts with the first wavelength light to produce a second wavelength.
Dependencies are inferred from the claim text.