A semiconductor based Light Emitting Device (LED) can include a p-type nitride layer and a metal ohmic contact, on the p-type nitride layer. The metal ohmic contact can have an average thickness of less than about 25 â„« and a specific contact resistivity less than about 10 âˆ’3 ohm-cm 2 .

Claims

20 · 1 independent · depth 4

20 granted claims

›1.independentA semiconductor based Light Emitting Device (LED) comprising:na p-type nitride layer; anda metal ohmic contact, on the p-type nitride layer, the metal…+19

›2.↳ 1An LED according to claim 1 wherein the metal ohmic contact covers about 100% of the p-type nitride layer.d2+1

›3.↳ 1An LED according to claim 1 wherein the metal ohmic contact covers less than 100% of the p-type nitride layer measured via an Auger analysis of the me…d2

›5.↳ 1An LED according to claim 1 wherein the metal ohmic contact covers less than about 70% of the p-type nitride layer measured via an Auger analysis of t…d2+1

›7.↳ 1An LED according to claim 1 wherein the metal ohmic contact covers less than about 47% of the p-type nitride layer measured via an Auger analysis of t…d2+2

›10.↳ 1An LED according to claim 1 wherein the metal ohmic contact comprises an average thickness less than about 3 â„«.d2+3

›14.↳ 1An LED according to claim 1 wherein the metal ohmic contact comprises an average thickness of about 1 â„«.d2+3

›18.↳ 1An LED according to claim 1 wherein the metal ohmic contact comprises platinum, rhodium, zinc oxide, palladium, palladium oxide, titanium, nickel/gold…d2

›19.↳ 1An LED according to claim 1 further comprising:na reflector beneath the metal ohmic contact configured to reflect light emitted through the metal ohmi…d2+1

Classifications

4 codes

IPC · International Patent Classification

Section H — Electricity

H01L29/22

USPC · US Patent Classification

257/99257/744257/745

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

6.2 y

2,281 days filing → grant

Office actions

after a restriction

Responses

2 RCE

Appeals

notices of appeal

Examiner

Matthew E Warren

art unit 2815 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 44 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

2 priority documents

Priority

27 Jul 2004

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 60591353	27 Jul 2004
related publication	US 20060046328 A1	2 Mar 2006

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.