Invention Grant
- Patent Title: Process for forming ultra-micro LEDS
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Application No.: US14616347Application Date: 2015-02-06
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Publication No.: US09281298B2Publication Date: 2016-03-08
- Inventor: William Johnstone Ray , Mark David Lowenthal , Lixin Zheng
- Applicant: Nthdegree Technologies Worldwide Inc.
- Applicant Address: US AZ Tempe
- Assignee: Nthdegree Technologies Worldwide Inc.
- Current Assignee: Nthdegree Technologies Worldwide Inc.
- Current Assignee Address: US AZ Tempe
- Agency: Patent Law Group LLP
- Agent Brian D. Ogonowsky
- Main IPC: H01L29/00
- IPC: H01L29/00 ; H01L25/075 ; H01L33/06 ; H01L33/32 ; H01L33/40 ; H01L33/42 ; H01L33/48 ; H01L33/62

Abstract:
A flexible light sheet includes a bottom conductor layer overlying a flexible substrate. An array of vertical light emitting diodes (VLEDs) is printed as an ink over the bottom conductor layer so that bottom electrodes of the VLEDs electrically contact the bottom conductor layer. A top electrode of the VLEDs is formed of a first transparent conductor layer, and a temporary hydrophobic layer is formed over the first transparent conductor layer. A dielectric material is deposited between the VLEDs but is automatically de-wetted off the hydrophobic layer. The hydrophobic layer is then removed, and a second transparent conductor layer is deposited to electrically contact the top electrode of the VLEDs. The VLEDs can be made less than 10 microns in diameter since no top metal bump electrode is used. The VLEDs are illuminated by a voltage differential between the bottom conductor layer and the second transparent conductor layer.
Public/Granted literature
- US20150228631A1 PROCESS FOR FORMING ULTRA-MICRO LEDS Public/Granted day:2015-08-13
Information query
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