Article(id=1154049394224652809, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154049103748125137, articleNumber=null, orderNo=null, doi=10.13234/j.issn.2095-2805.2024.3.258, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1706630400000, receivedDateStr=2024-01-31, revisedDate=1712419200000, revisedDateStr=2024-04-07, acceptedDate=1713369600000, acceptedDateStr=2024-04-18, onlineDate=1753076416784, onlineDateStr=2025-07-21, pubDate=1716998400000, pubDateStr=2024-05-30, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753076416784, onlineIssueDateStr=2025-07-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753076416784, creator=13701087609, updateTime=1753076416784, updator=13701087609, issue=Issue{id=1154049103748125137, tenantId=1146029695717560320, journalId=1146031654075715584, year='2024', volume='22', issue='3', pageStart='1', pageEnd='306', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1753076347529, creator=13701087609, updateTime=1753780989436, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1157004586184695853, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154049103748125137, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1157004586184695854, tenantId=1146029695717560320, journalId=1146031654075715584, issueId=1154049103748125137, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=258, endPage=263, ext={EN=ArticleExt(id=1154049394774106635, articleId=1154049394224652809, tenantId=1146029695717560320, journalId=1146031654075715584, language=EN, title=Research on Influence of Drain-source Voltage on Accurate Measurement of SiC MOSFET Threshold Voltage, columnId=1154049353741226958, journalTitle=Journal of Power Supply, columnName=On-line Monitor, runingTitle=null, highlight=null, articleAbstract=
Compared with that in a Si device, the area of near interface oxide traps in a SiC MOSFET is wider, and the corresponding density of traps is two orders of magnitude higher. A lot of traps which are continuously capturing or releasing charges will cause the threshold voltage (Vt) to fluctuate with time, leading to the difficulty in accurately and repeatedly measuring the value of Vith. In the standard method, the value of Vith is measured using a preprocessing method to ensure the consistence in measuring the trap charge state in each time. However, the preprocessed trap state which is affected by drain-source voltages is not taken into account in the standard method, which will bring errors to the Vth test. Aimed at this problem, the transfer curves under the influences of different drain-source voltage pulses were measured at first, which show the effects of different drain-source voltages on Vth. Second, the influence of drain-source voltage on the trap charge state was analyzed based on the transient current method, thus clarifying the mechanism of the influence of drain-source voltage on traps. Finally, the influences of different drain-source voltages on Vith measurement were com-pared. Results indicate that the drain-source voltage affects the positive and negative electric field between the gate and drain, thereby affecting the trap charge state and causing the Vith drift. It is suggested that a smaller drain-source voltage should be used when measuring Vith to improve the measurement accuracy and reduce errors caused by testing factors in reliability experiments.
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相较于Si器件,SiC MOSFET 近界面氧化物陷阱区域更广,界面态陷阱密度高出2个数量级,大量陷阱不断俘获或释放电荷,导致阈值电压(V)随时间波动较大,因而V的准确重复测量成为难题。标准中阈值电压测量采用预处理的方法,保证每次测量时陷阱电荷状态的一致性,但标准中未考虑漏源电压影响预处理填充后的陷阱状态,导致阈值电压测试误差。针对该问题,首先通过测量不同漏源电压脉冲影响下的转移曲线,显示不同源漏电压对阈值电压的影响;然后,基于瞬态电流法分析了漏源电压对陷阱电荷状态的影响;进而,分析了漏源电压影响陷阱的机理;最后对比了不同漏源电压对阈值电压测量的影响。实验表明,漏源电压影响栅漏间电场正负,进而影响陷阱填充或释放电荷,导致阈值电压漂移。测量阈值电压时使用较小漏源电压可提高测量准确性,减小可靠性实验由测试因素造成的误差。
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 |
姚博均(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:s202272125@emails.bjut.edu.cn。 |
郭春生(1980-),男,通信作者,博士,副教授。研究方向:微电子器件与集成电路可靠性。E-mail: guocs@bjut.edu.cn。
崔绍雄(1999-),男,硕士研究生。研究方向:SiC半导体可靠性。E-mail:shaoxiongcui@emails.bjut.edu.cn。
李嘉芃(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:jiapengli@emails.bjut.edu.cn。
张亚民(1970–),男,博士,副教授。研究方向:半导体器件及可靠性。E-mail:yaminzhang@bjut.edu.cn。
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姚博均(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:s202272125@emails.bjut.edu.cn。
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姚博均(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:s202272125@emails.bjut.edu.cn。
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郭春生(1980-),男,通信作者,博士,副教授。研究方向:微电子器件与集成电路可靠性。E-mail: guocs@bjut.edu.cn。
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郭春生(1980-),男,通信作者,博士,副教授。研究方向:微电子器件与集成电路可靠性。E-mail: guocs@bjut.edu.cn。
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崔绍雄(1999-),男,硕士研究生。研究方向:SiC半导体可靠性。E-mail:shaoxiongcui@emails.bjut.edu.cn。
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崔绍雄(1999-),男,硕士研究生。研究方向:SiC半导体可靠性。E-mail:shaoxiongcui@emails.bjut.edu.cn。
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李嘉芃(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:jiapengli@emails.bjut.edu.cn。
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李嘉芃(2000-),男,硕士研究生。研究方向:SiC 半导体可靠性。E-mail:jiapengli@emails.bjut.edu.cn。
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张亚民(1970–),男,博士,副教授。研究方向:半导体器件及可靠性。E-mail:yaminzhang@bjut.edu.cn。
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张亚民(1970–),男,博士,副教授。研究方向:半导体器件及可靠性。E-mail:yaminzhang@bjut.edu.cn。
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Mechanism of threshold voltage instability, figureFileSmall=+OGcGeFZHIrVHlrvGH1iIw==, figureFileBig=oDuFLx1ROYZ4UHUUh7wMBg==, tableContent=null), ArticleFig(id=1154049419839267411, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图1, caption=
阈值电压不稳定机理, figureFileSmall=+OGcGeFZHIrVHlrvGH1iIw==, figureFileBig=oDuFLx1ROYZ4UHUUh7wMBg==, tableContent=null), ArticleFig(id=1154049419885404756, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 2, caption=
Time series and transfer curves under different short pulses, figureFileSmall=Gb1he4wPWZOThqDUH3tx8g==, figureFileBig=mwSHwyImWnm5gI3t1Vhi5g==, tableContent=null), ArticleFig(id=1154049419935736405, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图2, caption=
时序与不同短脉冲下的转移曲线, figureFileSmall=Gb1he4wPWZOThqDUH3tx8g==, figureFileBig=mwSHwyImWnm5gI3t1Vhi5g==, tableContent=null), ArticleFig(id=1154049419981873750, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 3, caption=
Time series for transient current test, figureFileSmall=NYHdg1BEfZDSqw2A6PwBcA==, figureFileBig=2euqJCaqLZFGoNoAvxnYfg==, tableContent=null), ArticleFig(id=1154049420028011095, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图3, caption=
瞬态电流测试时序, figureFileSmall=NYHdg1BEfZDSqw2A6PwBcA==, figureFileBig=2euqJCaqLZFGoNoAvxnYfg==, tableContent=null), ArticleFig(id=1154049420074148440, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 4, caption=
Transient drain current and trap time constant spectrum, figureFileSmall=8nZ0FhPad9cNBaOGMS3ZFQ==, figureFileBig=p2cnM6lEtfwcBnap+qxESA==, tableContent=null), ArticleFig(id=1154049420124480089, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图4, caption=
瞬态漏极电流与陷阱时间常数谱, figureFileSmall=8nZ0FhPad9cNBaOGMS3ZFQ==, figureFileBig=p2cnM6lEtfwcBnap+qxESA==, tableContent=null), ArticleFig(id=1154049420174811738, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 5, caption=
Electronic motion band, figureFileSmall=kBJwNZjq+C+wM0kP7pcWBQ==, figureFileBig=M/H1JMy5O1nNeE8J5KAZCA==, tableContent=null), ArticleFig(id=1154049420220949083, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图5, caption=
电子运动能带, figureFileSmall=kBJwNZjq+C+wM0kP7pcWBQ==, figureFileBig=M/H1JMy5O1nNeE8J5KAZCA==, tableContent=null), ArticleFig(id=1154049420267086428, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 6, caption=
Schematic of trap changes in tested planar gate NMOSFET device, figureFileSmall=f80g4O1wYJZtsdxtMOH5hQ==, figureFileBig=7T6zIPvkLgtF8nRzGXQj4w==, tableContent=null), ArticleFig(id=1154049420330000989, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图6, caption=
被测平面栅 NMOSFET 器件陷阱变化示意, figureFileSmall=f80g4O1wYJZtsdxtMOH5hQ==, figureFileBig=7T6zIPvkLgtF8nRzGXQj4w==, tableContent=null), ArticleFig(id=1154049420380332638, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Fig. 7, caption=
Time series for threshold voltage test using voltage sweep method, figureFileSmall=MniSlBGkZg52149UhWmxyw==, figureFileBig=FLIdNUP7YcGR5nVeI2bQ3A==, tableContent=null), ArticleFig(id=1154049420447441503, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=图7, caption=
电压扫描法阈值电压测试时序, figureFileSmall=MniSlBGkZg52149UhWmxyw==, figureFileBig=FLIdNUP7YcGR5nVeI2bQ3A==, tableContent=null), ArticleFig(id=1154049420510356064, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=EN, label=Tab. 1, caption=
Results of threshold voltage test, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试次数 | 阈值电压/V | 标准差 |
| $\mathrm{{CREE}}\left({{V}_{\mathrm{{ds}}}= 5\mathrm{\;V}}\right)$ | 1 | 3.231 | 0.0210 |
| 2 | 3.287 |
| 3 | 3.271 |
| 4 | 3.251 |
| CREE$\left({{V}_{\mathrm{{ds}}}= {500}\mathrm{{mV}}}\right)$ | 1 | 3.480 | 0.0092 |
| 2 | 3.489 |
| 3 | 3.473 |
| 4 | 3.464 |
), ArticleFig(id=1154049420569076321, tenantId=1146029695717560320, journalId=1146031654075715584, articleId=1154049394224652809, language=CN, label=表1, caption=
阈值电压测试结果, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试次数 | 阈值电压/V | 标准差 |
| $\mathrm{{CREE}}\left({{V}_{\mathrm{{ds}}}= 5\mathrm{\;V}}\right)$ | 1 | 3.231 | 0.0210 |
| 2 | 3.287 |
| 3 | 3.271 |
| 4 | 3.251 |
| CREE$\left({{V}_{\mathrm{{ds}}}= {500}\mathrm{{mV}}}\right)$ | 1 | 3.480 | 0.0092 |
| 2 | 3.489 |
| 3 | 3.473 |
| 4 | 3.464 |
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