Semiconductor devices with 2DEG and 2DHG
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jul 21, 2015
Grant Date -
Aug 29, 2013
app pub date -
Jun 7, 2011
filing date -
Jul 28, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A semiconductor device comprises three semiconductor layers. The semiconductor layers are arranged to form a 2DHG and a 2DEG separated by a polarization layer. The device comprises a plurality of electrodes: first and second electrodes electrically connected to the 2DHG so that current can flow between them via the 2DHG and a third electrode electrically connected to the 2DEG so that when a positive voltage is applied to the third electrode, with respect to at least one of the other electrodes, the 2DEG and the 2DHG will be at least partially depleted.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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THE UNIVERSITY OF SHEFFIELD | FIRTH COURT WESTERN BANK SHEFFIELD S10 2TN |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Madathil, Sankara Narayanan Ekkanath | Leicester, GB | 3 | 82 |
# of filed Patents : 3 Total Citations : 82 | |||
Nakajima, Akira | Tsukuba, JP | 164 | 1775 |
# of filed Patents : 164 Total Citations : 1775 |
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Patent Citation Ranking
- 7 Citation Count
- H01L Class
- 10.46 % this patent is cited more than
- 10 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 21, 2027 |
Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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Jan 10, 2011 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Dec 10, 2010 | FP | EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Dec 10, 2010 |
Dec 10, 2010 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Jul 19, 2010 | REMI | MAINTENANCE FEE REMINDER MAILED | |
May 19, 2006 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Dec 10, 2002 | I | Issuance | |
May 30, 2002 | P | Published | |
Jan 23, 2002 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NIELSEN, JESPER SOEBYGAARD;KAPPEL, LARS;REEL/FRAME:012533/0645;SIGNING DATES FROM 20011207 TO 20011212 Owner name: DANFOSS DRIVES A/S, DENMARK |
Nov 20, 2001 | F | Filing | |
Nov 24, 2000 | PD | Priority Date |

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