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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2025-61-1-34-46</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-824</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Емкостная спектроскопия электронных состояний на границе раздела SiO2/n-Si в облученных ионами гелия МОП-структурах</article-title><trans-title-group xml:lang="en"><trans-title>Capacitance spectroscopy of electro nic states at the SiO2/n-Si interface in MOS structures irradiated with helium ions</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9396-8146</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбачук</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbachuk</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Горбачук Николай Иванович – кандидат физико-математических наук, доцент</p><p>пр. Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Nikolay I. Gorbachuk – Ph. D. (Physics and Mathematics), Associate Professor</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">gorbachuk@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ермакова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ermakova</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ермакова Екатерина Александровна – магистрант</p><p>пр. Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Katerina A. Ermakova – Master Student</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">ermakova.7003@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0799-6950</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Поклонский</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Poklonski</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Поклонский Николай Александрович – член-корреспондент Национальной академии наук Беларуси, доктор физико-математических наук, профессор</p><p>пр. Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Nikolai A. Poklonski – Corresponding Member of the National Academy of Sciences of Belarus, Dr. Sc. (Physics and Mathematics), Professor</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">poklonski@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шпаковский</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shpakovski</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шпаковский Сергей Васильевич – кандидат физико-математических наук, начальник отделения</p><p>ул. Казинца 121а, 220108, Минск</p></bio><bio xml:lang="en"><p>Sergey V. Shpakovski – Ph. D. (Physics and Mathema tics), Head of Department</p><p>121а, Kazinets Str., 220108, Minsk</p></bio><email xlink:type="simple">SShpakovskiy@integral.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ОАО «ИНТЕГРАЛ» – управляющая компания холдинга «ИНТЕГРАЛ»</institution></aff><aff xml:lang="en"><institution>JSC “INTEGRAL” – Holding Management Company “INTEGRAL”</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>03</month><year>2025</year></pub-date><volume>61</volume><issue>1</issue><fpage>34</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Горбачук Н.И., Ермакова Е.А., Поклонский Н.А., Шпаковский С.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Горбачук Н.И., Ермакова Е.А., Поклонский Н.А., Шпаковский С.В.</copyright-holder><copyright-holder xml:lang="en">Gorbachuk N.I., Ermakova K.A., Poklonski N.A., Shpakovski S.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/824">https://vestifm.belnauka.by/jour/article/view/824</self-uri><abstract><p>Исследовались МОП-структуры Al/SiO2/n-Si/Al, изготовленные на пластинах (100) монокристаллического кремния n-типа проводимости, выращенного методом Чохральского. Удельное электрическое сопротивление кремния – 4,5 Ом · см при комнатной температуре. Толщина термически сформированного в сухом кислороде слоя SiO2 – 420 нм. Толщина осажденного поверх SiO2 слоя алюминия – 0,7 мкм. Площадь алюминиевой металлизации – 1,85 × 1,85 мм2. При комнатной температуре структуры облучались ионами гелия (кинетическая энергия одного иона 5 МэВ). Флюенс облучения варьировался от 1010 до 1013 см−2. По выполненным в программе SRIM расчетам средний проективный пробег иона гелия в структуре составлял ≈ 24 мкм. Измерения модуля импеданса Z и угла сдвига фаз φ между током и напряжением выполнялись в диапазоне частот от 20 Гц до 2 МГц на измерителе LCR E4980A. Амплитуда сигнала – 40 мВ. Постоянное напряжение смещения U изменялось в пределах от –40 до 40 В. МОП-структуры находились в темноте при комнатной температуре. Спектры DLTS регистрировались с помощью емкостного спектрометра СЕ-7С в диапазоне температур 80–300 К. Значения напряжения импульсов заполнения Up ловушек электронами c-зоны и эмиссии Ue электронов из ловушек в c-зону n-Si изменялись в интервале от −0,5 до −9 В. Длительность импульса заполнения ловушек электронами составляла tp = 0,75 мс, а эмиссии электронов из ловушек – te = 20 мс. Установлено, что для облученных ионами гелия флюенсами ≤1012 см−2 структур Al/SiO2/n-Si/Al зависимость емкости от частоты в режиме обеднения определяется перезарядкой поверхностных электронных состояний на границе раздела SiO2/n-Si. Показано, что в исходных структурах для быстрых (время перезарядки менее 1 мкс) поверхностных состояний зависимость энергетической плотности состояний Nss от потенциальной энергии eψ электрона в n-Si вблизи границы раздела SiO2/n-Si имеет максимум при eψ ≈ EF – 0,1 эВ (здесь e – элементарный заряд, ψ – электрический потенциал, EF – уровень Ферми). Этот максимум после облучения ионами гелия флюенсом 1012 см−2 сдвигается в сторону меньших энергий вплоть до eψ ≈ EF – 0,2 эВ. В облученных структурах на зависимости Nss(eψ) появляется второй максимум в области eψ &gt; 0. Для флюенса облучения 1012 см−2 максимум расположен при eψ ≈ EF + 0,1 эВ. Показана возможность исследования поверхностных состояний методом спектроскопии DLTS в выделенном энергетическом интервале путем варьирования напряжения эмиссии Ue при постоянном значении напряжения заполнения Up и/или варьирования напряжения заполнения Up при постоянном значении напряжения эмиссии Ue.</p></abstract><trans-abstract xml:lang="en"><p>Al/SiO2/n-Si/Al MOS structures fabricated on (100) wafers of single-crystal n-type silicon grown with the Czochralski method were studied. The electrical resistivity of silicon was 4.5 Ohm · cm at room temperature. The thickness of the SiO2 layer thermally formed in dry oxygen was 420 nm. The thickness of the aluminum layer deposited on top of SiO2 was 0.7 µm. The area of aluminum metallization was 1.85 × 1.85 mm2. At a room temperature, the structures were irradiated with helium ions (kinetic energy of an ion was 5 MeV). The radiation fluence ranged from 1010 to 1013 cm−2. According to calculations performed in the SRIM program, the average projective range of the helium ion in the structure was ≈ 24 µm. The impedance modulus Z and the phase shift angle φ between the current and voltage were measured in the frequency range from 20 Hz to 2 MHz using an E4980A LCR meter. The signal amplitude was 40 mV. The constant bias voltage U varied from −40 to 40 V. The MOS structures were kept in the dark at a room temperature. The DLTS spectra were recorded using CE-7C capacitance spectrometer in the temperature range of 80–300 K. The voltage pulses for filling traps Up with c-band electrons and the voltage of emission Ue of electrons from traps to c-band of n-Si varied in the range from −0.5 to −9 V. The pulse duration for filling traps with electrons was tp = 0.75 ms, and the pulse duration for emission of electrons from traps was te = 20 ms. It was found that for the Al/SiO2/n-Si/Al structures irradiated with helium ions with fluences of ≤1012 cm−2, the dependence of the capacitance on the frequency in the depletion mode is determined by the recharging of the surface electron states at the SiO2/n-Si interface. It was shown that in the initial structures for fast (recharging time &lt;1 µs) surface states, the dependence of the energy density of states Nss on the potential energy eψ of an electron in n-Si near the SiO2/n-Si interface has its maximum at eψ ≈ EF – 0.1 eV (here e is the elementary charge, ψ is the electric potential, EF is the Fermi energy level). After irradiation with helium ions with a fluence of 1012 cm−2, this maximum shifts towards lower energies down to eψ ≈ EF – 0.2 eV. In the irradiated structures, a second maximum appears on the Nss(eψ) dependence in the region of eψ &gt; 0. For an irradiation fluence of 1012 cm−2, the maximum is located at eψ ≈ EF + 0.1 eV. The possibility of studying surface states with the DLTS spectroscopy method in the selected energy range by varying the emission voltage Ue at a constant value of the filling voltage Up and/or varying the filling voltage Up at a constant value of the emission voltage Ue is shown. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>структуры металл–оксид–полупроводник–металл</kwd><kwd>вольт-фарадные характеристики</kwd><kwd>импеданс</kwd><kwd>кремний</kwd><kwd>поверхностные электронные состояния</kwd><kwd>радиационные дефекты</kwd><kwd>DLTS</kwd></kwd-group><kwd-group xml:lang="en"><kwd>structures metal–oxide–semiconductor–metal</kwd><kwd>C–V curves</kwd><kwd>impedance</kwd><kwd>silicon</kwd><kwd>surface electron states</kwd><kwd>irradiation-induced defects</kwd><kwd>DLTS</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана Государ ственной программой научных исследований «Материало ведение, новые материалы и технологии» на 2021–2025 годы, подпрограмма «Физика конденсированного состояния и создание новых функциональных материалов и технологий их получения» (задание 1.8.2).</funding-statement><funding-statement xml:lang="en">The work was supported by the  Be larusian National Research Program “Materials Science, New Materials and Technologies” for 2021–2025, subprogram “Condensed Matter Physics and Development of New Functional Materials and Technologies for their Production” (task 1.8.2).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Sze, S. 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