Invention Grant
- Patent Title: Wire bond free wafer level LED
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Application No.: US15449510Application Date: 2017-03-03
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Publication No.: US10199360B2Publication Date: 2019-02-05
- Inventor: Bernd Keller , Ashay Chitnis , Nicholas W. Medendorp, Jr. , James Ibbetson , Max Batres
- Applicant: CREE, INC.
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Main IPC: H01L33/00
- IPC: H01L33/00 ; H01L25/075 ; H01L33/58 ; H01L33/50 ; H01L33/38 ; H01L33/62 ; H01L33/08 ; H01L33/22 ; H01L33/48 ; H01L33/46

Abstract:
A wire-bond free semiconductor device with two electrodes both of which are accessible from the bottom side of the device. The device is fabricated with two electrodes that are electrically connected to the oppositely doped epitaxial layers, each of these electrodes having leads with bottom-side access points. This structure allows the device to be biased with an external voltage/current source, obviating the need for wire-bonds or other such connection mechanisms that must be formed at the packaging level. Thus, features that are traditionally added to the device at the packaging level (e.g., phosphor layers or encapsulants) may be included in the wafer level fabrication process. Additionally, the bottom-side electrodes are thick enough to provide primary structural support to the device, eliminating the need to leave the growth substrate as part of the finished device.
Public/Granted literature
- US20170179088A1 WIRE BOND FREE WAFER LEVEL LED Public/Granted day:2017-06-22
Information query
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