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Extract from the Register of European Patents

EP About this file: EP2454751

EP2454751 - HIGH-GAIN WIDE BANDGAP DARLINGTON TRANSISTORS AND RELATED METHOD OF FABRICATION [Right-click to bookmark this link]
Former [2012/21]HIGH-GAIN WIDE BANDGAP DARLINGTON TRANSISTORS AND RELATED METHODS OF FABRICATION
[2019/44]
StatusNo opposition filed within time limit
Status updated on  12.02.2021
Database last updated on 30.07.2024
FormerThe patent has been granted
Status updated on  06.03.2020
FormerGrant of patent is intended
Status updated on  23.10.2019
FormerExamination is in progress
Status updated on  12.10.2017
Most recent event   Tooltip08.07.2022Lapse of the patent in a contracting state
New state(s): MK		published on 10.08.2022  [2022/32]
Applicant(s)For all designated states
Cree, Inc.
4600 Silicon Drive
Durham, NC 27703 / US
[2012/21]
Inventor(s)01 / ZHANG, Qingchun
108 Hickorywood Boulevard
Cary, NC 27519 / US
02 / AGARWAL, Anant K.
208 Black Tie Lane
Chapel Hill, NC 27514 / US
 [2012/21]
Representative(s)Boult Wade Tennant LLP
Salisbury Square House
8 Salisbury Square
London EC4Y 8AP / GB
[2020/15]
Former [2014/02]Boult Wade Tennant
Verulam Gardens
70 Gray's Inn Road
London WC1X 8BT / GB
Former [2012/21]Cross, Rupert Edward Blount
Boult Wade Tennant
Verulam Gardens
70 Gray's Inn Road
GB-London WC1X 8BT / GB
Application number, filing date10742052.315.07.2010
[2020/15]
WO2010US42075
Priority number, dateUS2009050338615.07.2009         Original published format: US 503386
[2012/21]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2011008919
Date:20.01.2011
Language:EN
[2011/03]
Type: A1 Application with search report 
No.:EP2454751
Date:23.05.2012
Language:EN
The application published by WIPO in one of the EPO official languages on 20.01.2011 takes the place of the publication of the European patent application.
[2012/21]
Type: B1 Patent specification 
No.:EP2454751
Date:08.04.2020
Language:EN
[2020/15]
Search report(s)International search report - published on:EP20.01.2011
ClassificationIPC:H01L21/82, H01L27/082, H01L29/73, // H01L29/16
[2019/44]
CPC:
H01L27/0825 (EP,US); H01L21/8213 (EP,US); H01L29/73 (EP,US);
H01L29/1608 (EP,US)
Former IPC [2012/21]H01L21/82, H01L27/082, H01L29/73
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   SE,   SI,   SK,   SM,   TR [2012/21]
Extension statesBANot yet paid
MENot yet paid
RSNot yet paid
TitleGerman:DARLINGTON-TRANSISTOREN MIT HOHER VERSTÄRKUNG UND BREITER BANDLÜCKE SOWIE ZUGEHÖRIGES HERSTELLUNGSVERFAHREN[2019/44]
English:HIGH-GAIN WIDE BANDGAP DARLINGTON TRANSISTORS AND RELATED METHOD OF FABRICATION[2019/44]
French:TRANSISTORS DARLINGTON À LARGE BANDE INTERDITE ET À GAIN ÉLEVÉ ET PROCÉDÉ DE FABRICATION CORRESPONDANT[2019/44]
Former [2012/21]DARLINGTON-TRANSISTOREN MIT HOHER VERSTÄRKUNG UND BREITER BANDLÜCKE SOWIE ZUGEHÖRIGE HERSTELLUNGSVERFAHREN
Former [2012/21]HIGH-GAIN WIDE BANDGAP DARLINGTON TRANSISTORS AND RELATED METHODS OF FABRICATION
Former [2012/21]TRANSISTORS DARLINGTON À LARGE BANDE INTERDITE ET À GAIN ÉLEVÉ ET PROCÉDÉS DE FABRICATION CORRESPONDANTS
Entry into regional phase13.01.2012National basic fee paid 
13.01.2012Designation fee(s) paid 
13.01.2012Examination fee paid 
Examination procedure13.05.2011Request for preliminary examination filed
International Preliminary Examining Authority: EP
13.01.2012Examination requested  [2012/21]
10.09.2012Amendment by applicant (claims and/or description)
04.06.2013Despatch of a communication from the examining division (Time limit: M06)
16.12.2013Reply to a communication from the examining division
15.09.2015Despatch of a communication from the examining division (Time limit: M04)
25.01.2016Reply to a communication from the examining division
02.10.2017Despatch of a communication from the examining division (Time limit: M06)
16.02.2018Reply to a communication from the examining division
23.09.2019Cancellation of oral proceeding that was planned for 24.09.2019
24.09.2019Date of oral proceedings (cancelled)
24.10.2019Communication of intention to grant the patent
28.02.2020Fee for grant paid
28.02.2020Fee for publishing/printing paid
28.02.2020Receipt of the translation of the claim(s)
Divisional application(s)The date of the Examining Division's first communication in respect of the earliest application for which a communication has been issued is  04.06.2013
Opposition(s)12.01.2021No opposition filed within time limit [2021/11]
Fees paidRenewal fee
13.07.2012Renewal fee patent year 03
10.07.2013Renewal fee patent year 04
14.07.2014Renewal fee patent year 05
10.07.2015Renewal fee patent year 06
11.07.2016Renewal fee patent year 07
12.07.2017Renewal fee patent year 08
11.07.2018Renewal fee patent year 09
15.07.2019Renewal fee patent year 10
Opt-out from the exclusive  Tooltip
competence of the Unified
Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition  TooltipHU15.07.2010
AL08.04.2020
AT08.04.2020
CY08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
MK08.04.2020
MT08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SI08.04.2020
SK08.04.2020
SM08.04.2020
TR08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
IE15.07.2020
LU15.07.2020
BE31.07.2020
CH31.07.2020
FR31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
[2022/32]
Former [2022/27]HU15.07.2010
AL08.04.2020
AT08.04.2020
CY08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
MT08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SI08.04.2020
SK08.04.2020
SM08.04.2020
TR08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
IE15.07.2020
LU15.07.2020
BE31.07.2020
CH31.07.2020
FR31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2022/26]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SI08.04.2020
SK08.04.2020
SM08.04.2020
TR08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
IE15.07.2020
LU15.07.2020
BE31.07.2020
CH31.07.2020
FR31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/37]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SI08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
IE15.07.2020
LU15.07.2020
BE31.07.2020
CH31.07.2020
FR31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/23]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SI08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
LU15.07.2020
BE31.07.2020
CH31.07.2020
FR31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/22]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
GB15.07.2020
LU15.07.2020
CH31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/20]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
LU15.07.2020
CH31.07.2020
LI31.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/13]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
MC08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/10]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
PL08.04.2020
RO08.04.2020
SE08.04.2020
SK08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/09]AL08.04.2020
AT08.04.2020
CZ08.04.2020
DK08.04.2020
EE08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
IT08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
RO08.04.2020
SE08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/08]AL08.04.2020
DK08.04.2020
ES08.04.2020
FI08.04.2020
HR08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
RO08.04.2020
SE08.04.2020
SM08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/04]AL08.04.2020
FI08.04.2020
HR08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
SE08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2021/01]FI08.04.2020
HR08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
SE08.04.2020
BG08.07.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2020/50]FI08.04.2020
HR08.04.2020
LT08.04.2020
LV08.04.2020
NL08.04.2020
SE08.04.2020
NO08.07.2020
GR09.07.2020
IS08.08.2020
PT17.08.2020
Former [2020/48]FI08.04.2020
LT08.04.2020
NL08.04.2020
SE08.04.2020
NO08.07.2020
IS08.08.2020
PT17.08.2020
Former [2020/47]LT08.04.2020
NO08.07.2020
IS08.08.2020
Former [2020/46]IS08.08.2020
Cited inInternational search[Y]JPS60240158  (MITSUBISHI ELECTRIC CORP) [Y] 1-10,13-19 * abstract *;
 [I]US2006261876  (AGARWAL ANANT K [US], et al) [I] 11,12,20,21 * paragraphs [0057] , [0069] , [0073]; figures 8-10 *;
 [A]WO2004079789  (RENSSELAER POLYTECH INST [US], et al) [A] 1,6,7,13 * abstract *
 [IY]  - QINGCHUN ZHANG ET AL, "A 10-kV Monolithic Darlington Transistor With of 336 in 4H-SiC", IEEE ELECTRON DEVICE LETTERS, IEEE SERVICE CENTER, NEW YORK, NY, US LNKD- DOI:10.1109/LED.2008.2009953, (20090201), vol. 30, no. 2, ISSN 0741-3106, pages 142 - 144, XP011240662 [I] 11,12,20,21 * Sections I and II; section III, first paragraph;;; figures 1,4 * [Y] 1-10,13-19

DOI:   http://dx.doi.org/10.1109/LED.2008.2009953
 [I]  - KRISHNASWAMI S ET AL, "High temperature characterization of 4H-SiC bipolar junction transistors", MATERIALS SCIENCE FORUM, AEDERMANNSFDORF, CH, (20060101), vol. 527-529, ISSN 0255-5476, pages 1437 - 1440, XP009138720 [I] 11,12 * page 1439, paragraph l; figures 1, 10 *
ExaminationUS2008237704
 US4291319
by applicantUS4945394
 US6218254
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.