IP Library Granted Patent US 7,989,824
Granted Patent B2
US 7,989,824 · App. 12/766,221 · Granted Aug 2, 2011

Method of forming a dielectric layer on a semiconductor light emitting device

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Quick Facts
Patent No.
US 7,989,824
App. No.
12/766,221
Granted
Aug 2, 2011
Kind
B2
Abstract

A semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region is formed. A first metal contact is formed on a portion of the n-type region and a second metal contact is formed on a portion of the p-type region. The first and second metal contacts are formed on a same side of the semiconductor structure. A dielectric material is disposed between the first and second metal contacts. The dielectric material is in direct contact with a portion of the semiconductor structure, a portion of the first metal contact, and a portion of the second metal contact. A planar surface is formed including a surface of the first metal contact, a surface of the second metal contact, and a surface of the dielectric material

Claims (13)

1. A device comprising:

a semiconductor structure comprising a light emitting layer disposed between an n-type region and a p-type region;

a first metal contact disposed on a portion of the n-type region and a second metal contact disposed on a portion of the p-type region, wherein:

the first and second metal contacts are formed on a same side of the semiconductor structure;

the first and second metal contacts are substantially planar; and

the first metal contact is in direct contact with the n-type region and the second metal contact is in direct contact with the p-type region; wherein the first metal contact is formed on a portion of the n-type region exposed by etching away a portion of the p-type region and the light emitting layer

a dielectric material disposed between the first and second metal contacts, wherein the dielectric material is in direct contact with a portion of the semiconductor structure, a portion of the first metal contact, and a portion of the second metal contact; and

a top surface of the device, including a surface of the first metal contact, a surface of the second metal contact, and a surface of the dielectric material, is sufficiently planar to support the semiconductor structure during removal of a growth substrate.

2. The device of claim 1 wherein the first metal contact substantially surrounds the second metal contact.

3. The device of claim 1 wherein a top surface of the dielectric layer is less than 500 nm below a top surface of the second metal contact.

4. The device of claim 1 wherein the first metal contact surrounds the light emitting layer and includes a plurality of fingers which extend toward a center of the device.

5. The device of claim 1 wherein first metal contact is thicker than the second metal contact.

6. The device of claim 1 wherein the dielectric material is one of a polymer, polyimide, and benzocyclobutene.

Assignments (6)
RELEASE OF SECURITY INTEREST Recorded Jan 29, 2025
From: SOUND POINT AGENCY LLC
To: LUMILEDS LLC; LUMILEDS HOLDING B.V.
Reel/Frame 070046/0001 →
SECURITY INTEREST Recorded Jan 5, 2023
From: LUMILEDS LLC; LUMILEDS HOLDING B.V.
To: SOUND POINT AGENCY LLC
Reel/Frame 062299/0338 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 20, 2018
From: KONINKLIJKE PHILIPS N.V.
To: LUMILEDS LLC
Reel/Frame 048150/0603 →
CHANGE OF NAME Recorded Apr 30, 2018
From: KONINKLIJKE PHILIPS ELECTRONICS N V
To: KONINKLIJKE PHILIPS N.V.
Reel/Frame 046772/0611 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 21, 2017
From: ALDAZ, RAFAEL I; NEFF, JAMES G
To: KONINKLIJKE PHILIPS ELECTRONICS N V; PHILIPS LUMILEDS LIGHTING COMPANY, LLC
Reel/Frame 044456/0070 →
SECURITY INTEREST Recorded Jul 7, 2017
From: LUMILEDS LLC
To: DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT
Reel/Frame 043108/0001 →