ETCH REMOVAL OF CURRENT DISTRIBUTION LAYER FOR LED CURRENT CONFINEMENT
First Claim
Patent Images
1. An LED device comprising:
- an active layer between a first current spreading layer pillar and a second current spreading layer, wherein the first current spreading layer pillar is doped with a first dopant type and the second current spreading layer is doped with a second dopant type opposite the first dopant type;
a first cladding layer between the first current spreading layer pillar and the active layer; and
a second cladding layer between the second current spreading layer and the active layer;
wherein the first current spreading layer pillar protrudes away from the first cladding layer and the first cladding layer is wider than the first current spreading layer pillar.
2 Assignments
0 Petitions
Accused Products
Abstract
A method and structure for forming an array of LED devices is disclosed. The LED devices in accordance with embodiments of the invention may include a confined current injection area in which a current spreading layer protrudes away from a cladding layer in a pillar configuration so that the cladding layer is wider than the current spreading layer pillar.
-
Citations
32 Claims
-
1. An LED device comprising:
-
an active layer between a first current spreading layer pillar and a second current spreading layer, wherein the first current spreading layer pillar is doped with a first dopant type and the second current spreading layer is doped with a second dopant type opposite the first dopant type; a first cladding layer between the first current spreading layer pillar and the active layer; and a second cladding layer between the second current spreading layer and the active layer; wherein the first current spreading layer pillar protrudes away from the first cladding layer and the first cladding layer is wider than the first current spreading layer pillar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method of forming an LED device array comprising:
-
patterning a p-n diode layer of an LED substrate to form an array of current spreading layer pillars separated by an array of confinement trenches in a current spreading layer of the p-n diode layer, wherein the confinement trenches extend through the current spreading layer and expose a cladding layer of the p-n diode layer underneath the current spreading layer; forming a sacrificial release layer over the array of current spreading layer pillars and the cladding layer; bonding the LED substrate to a carrier substrate; removing a handle substrate from the LED substrate. patterning the p-n diode layer laterally between the array of current spreading layer pillars to form an array of LED devices, wherein each LED device includes a current spreading layer pillar of the array of current spreading layer pillars. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
-
-
24. A method of operating a display comprising:
-
sending a control signal to a driving transistor; and driving a current through an LED device including a confined current injection area in response to the control signal; wherein the LED device includes a current spreading layer pillar that protrudes away from a cladding layer, and the cladding layer is wider than the current spreading layer pillar. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
-
Specification