Light emitting diode chip and method of fabricating the same
DCFirst Claim
Patent Images
1. A light emitting diode (LED) chip, comprising:
- a substrate;
a light emitting structure arranged on the substrate, the light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer; and
an alternately laminated bottom structure disposed on the substrate and comprising dielectric pairs, each of the dielectric pairs comprising a first material layer having a first refractive index and a second material layer having a second refractive index, the first refractive index being greater than the second refractive index, the dielectric pairs comprising;
first dielectric pairs each comprising the first material layer and the second material layer, the first material layer and the second material layer each having an optical thickness less than λ
/4;
a second dielectric pair comprising the first material layer and the second material layer, one of the first material layer and the second material layer having an optical thickness less than λ
/4 and the other having an optical thickness greater than λ
/4; and
third dielectric pairs comprising the first material layer and the second material layer, each of the first material layer and the second material layer having an optical thickness greater than λ
/4,wherein λ
is a central wavelength of the visible light range, andwherein the first dielectric pairs are located closer to or farther from the substrate than the third dielectric pairs.
3 Assignments
Litigations
0 Petitions
Accused Products
Abstract
Exemplary embodiments of the present invention provide light emitting diode (LED) chips and a method of fabricating the same. An LED chip according to an exemplary embodiment includes a substrate; a light emitting structure arranged on the substrate, and an alternating lamination bottom structure arranged under the substrate. The alternating lamination bottom structure includes a plurality of dielectric pairs, each of the dielectric pairs including a first material layer having a first refractive index and a second material layer having a second refractive index, the first refractive index being greater than the second refractive index.
3 Citations
18 Claims
-
1. A light emitting diode (LED) chip, comprising:
-
a substrate; a light emitting structure arranged on the substrate, the light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer; and an alternately laminated bottom structure disposed on the substrate and comprising dielectric pairs, each of the dielectric pairs comprising a first material layer having a first refractive index and a second material layer having a second refractive index, the first refractive index being greater than the second refractive index, the dielectric pairs comprising; first dielectric pairs each comprising the first material layer and the second material layer, the first material layer and the second material layer each having an optical thickness less than λ
/4;a second dielectric pair comprising the first material layer and the second material layer, one of the first material layer and the second material layer having an optical thickness less than λ
/4 and the other having an optical thickness greater than λ
/4; andthird dielectric pairs comprising the first material layer and the second material layer, each of the first material layer and the second material layer having an optical thickness greater than λ
/4,wherein λ
is a central wavelength of the visible light range, andwherein the first dielectric pairs are located closer to or farther from the substrate than the third dielectric pairs. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A light emitting diode (LED) chip, comprising:
-
a substrate; a light emitting structure arranged on the substrate, the light emitting structure comprising a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer; an alternately laminated bottom structure disposed on the substrate and comprising dielectric pairs, each of the dielectric pairs comprising a first material layer having a first refractive index and a second material layer having a second refractive index, the first refractive index being greater than the second refractive index, the dielectric pairs comprising; first dielectric pairs each comprising the first material layer and the second material layer, the first material layer and the second material layer each having an optical thickness less than λ
/4;a second dielectric pair comprising the first material layer and the second material layer, one of the first material layer and the second material layer having an optical thickness less than λ
/4 and the other having an optical thickness greater than λ
/4; andthird dielectric pairs comprising the first material layer and the second material layer, each of the first material layer and the second material layer having an optical thickness greater than λ
/4,wherein λ
is a central wavelength of the visible light range; andan alternately laminated top structure arranged on the light emitting structure, the alternately laminated top structure configured to transmit light generated in the active layer and to reflect light within at least a portion of the visible light spectrum, the reflected light having a longer wavelength than light generated in the active region. - View Dependent Claims (9, 10, 11, 12)
-
-
13. A method of fabricating a light emitting diode chip, the method comprising;
-
forming at least one light emitting structure on a first surface of a substrate; and forming an alternately laminated bottom structure on an opposing second surface of the substrate, the alternately laminated bottom structure comprising dielectric pairs, each of the dielectric pairs comprising a first material layer comprising a first refractive index and a second material layer comprising a second refractive index, the first refractive index being greater than the second refractive index, the dielectric pairs comprising; first dielectric pairs comprising the first material layer and the second material layer, the first material layer and the second material layer each having an optical thickness less than λ
/4;a second dielectric pair comprising the first material layer and the second material layer, one of the first material layer and the second material layer having an optical thickness less than λ
/4 and the other having an optical thickness greater than λ
/4; andthird dielectric pairs comprising the first material layer and the second material layer, each of the first material layer and the second material layer having an optical thickness greater than λ
/4,wherein λ
is a central wavelength of the visible light range, andwherein the first dielectric pairs are located closer to or farther from the substrate than the third dielectric pairs. - View Dependent Claims (14, 15, 16, 17, 18)
-
Specification