Maria Vitoria Guimaraes Leal;Ahmad Azizimanesh;Nazmul Hasan;Stephen M. Wu
{"title":"Performance and Scalability of Strain Engineered 2D MoTe2 Phase-Change Memristors","authors":"Maria Vitoria Guimaraes Leal;Ahmad Azizimanesh;Nazmul Hasan;Stephen M. Wu","doi":"10.1109/JEDS.2025.3556316","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3556316","url":null,"abstract":"This work presents a performance optimization and scalability study of a two-dimensional vertical molybdenum ditelluride (MoTe2) phase-change memristor. The device switches between the semimetallic (1T’) and semiconducting (2H) states under an electric field. Process-induced strain engineering techniques at the contacts reduces the switching energy barrier, biasing the active region closer to the phase switching point. This work focuses on optimizing this technique to achieve the best yield and device performance, with a low switching voltage (<inline-formula> <tex-math>$leq 0.5$ </tex-math></inline-formula>V) and high on/off ratio <inline-formula> <tex-math>$geq 10{^{{5}}}$ </tex-math></inline-formula>. Small length and area of the contact between the metal stressor and the 2D 1T’-MoTe2 flake are critical for high yield and performance, potentially due to lowered chances of encountering defects introduced during the fabrication process (L<inline-formula> <tex-math>$leq 0.6mu $ </tex-math></inline-formula>m and A<inline-formula> <tex-math>$leq 0.3mu $ </tex-math></inline-formula>m2). Smaller flake contact perimeters <inline-formula> <tex-math>$leq 1.2mu $ </tex-math></inline-formula>m also reduce defect incidence, and increases on/off ratios. The switching voltage is influenced by the contact-flake geometry, exhibiting a lower value for 2D flake geometries with contact angles <inline-formula> <tex-math>$leq 65{^{text {o}}}$ </tex-math></inline-formula> likely due to geometric variation in strain distribution effects from process-induced strain engineering. These results demonstrate that by accounting for device geometry, our process may achieve yield approaching 90% with consistent low switching voltage and high on/off ratio. Yield and performance properties become better when scaled down in size due to our phase-change mechanism, which is the opposite behavior to most conductive filament based memristors.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"343-349"},"PeriodicalIF":2.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10945750","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AI-Assisted Design of Drain-Extended FinFET With Stepped Field Plate for Multi-Purpose Applications","authors":"Xiaoyun Huang;Hongyu Tang;Chenggang Xu;Yuxuan Zhu;Yan Pan;Dawei Gao;Yitao Ma;Kai Xu","doi":"10.1109/JEDS.2025.3555327","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3555327","url":null,"abstract":"Fin Field-Effect-Transistor (FinFET) has become fundamental components in advanced integrated circuit, while the drain-extended FinFET (DE-FinFET) features a lightly doped drain extension region to improve the device’s breakdown voltage. However, both structural refinement and the optimal integration of various parameters remain limited in achieving comprehensive optimization of device performance. This study introduces a novel DE-FinFET featuring a stepped field plate to improve overall performance of device. Moreover, within an AI-assisted design framework, predictive modeling and multi-objective optimization of the device are accomplished using Kolmogorov–Arnold Networks (KAN) and the Nondominated Sorting Genetic Algorithm (NSGA-III). More importantly, the proposed framework enables efficient device design and performance evaluation, achieving an average prediction accuracy of 98.19% for electrical performance metrics while being over two million times faster than traditional Technology Computer-Aided-Design (TCAD) simulations. In addition, it effectively generates Pareto-optimal solutions, delivering an average improvement of 9.03% across key electrical performance metrics. The proposed novel device of DE-FinFET offers a new route toward tailoring electrical properties. Meanwhile, the methodology of AI-assisted design not only accelerates device design but also enables customizable solutions for multi-purpose applications.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"326-333"},"PeriodicalIF":2.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10943177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Editorial for the J-EDS Special Issue for ESSERC 2024","authors":"Anne S. Verhulst","doi":"10.1109/JEDS.2025.3547035","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3547035","url":null,"abstract":"","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"189-189"},"PeriodicalIF":2.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10936519","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Antonio Vettoliere;Fabio Chiarella;Vincenzo Izzo;Marcello Campajola;Paolo Scotto Di Vettimo;Patrizia Minutolo;Alberto Aloisio;Ettore Sarnelli
{"title":"Dynamic Response of Low-Voltage Thin Film Phototransistors Based on DNTT Organic Semiconductor","authors":"Antonio Vettoliere;Fabio Chiarella;Vincenzo Izzo;Marcello Campajola;Paolo Scotto Di Vettimo;Patrizia Minutolo;Alberto Aloisio;Ettore Sarnelli","doi":"10.1109/JEDS.2025.3553583","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3553583","url":null,"abstract":"We analyzed the dynamic response to the light of organic field-effect transistors in bottom-gate/top-contact configuration. We fabricated Al/Al2O3/SAM/DNTT/Au phototransistors by evaporating thin film layers through shadow masks on flexible PEN (polyethylene naphthalate) substrates. The structure is composed of Al layer as the gate electrode, and Au used both for Source and Drain electrodes. DNTT (Dinaphtho[2,3-b:<inline-formula> <tex-math>$2^{prime }$ </tex-math></inline-formula>,<inline-formula> <tex-math>$3^{prime }$ </tex-math></inline-formula>-f]thieno[3,2-b]thiophene) is the active organic semiconductor layer and Al2O3 is the dielectric material, chosen for the high value of the dielectric constant. SAM (self-assembled monolayer) was used to improve adhesion and interface properties between Al2O3 and DNTT. The transistors, sensitive to blue light, were biased at low-voltage (Vgs and <inline-formula> <tex-math>$mathrm { V_{ds}}$ </tex-math></inline-formula> from 0 to 3.5 V). Devices showed low <inline-formula> <tex-math>$mathrm { I_{gs}}$ </tex-math></inline-formula> leakage currents, of the order of <inline-formula> <tex-math>$5x10^{-10}$ </tex-math></inline-formula> A, and a clear electro-optical response to the light. The maximum responsivity value was about 0.21 A/W in the static regime, while the lowest irradiance producing a measurable response in dynamic regime was <inline-formula> <tex-math>$13~mu $ </tex-math></inline-formula>W/cm2. Fast time components of the rise time of the light response for the analyzed phototransistors, of the order of few hundreds of ms, turned out to be among the fastest reported in literature for Al/AlOx/DNTT/Au organic phototransistor. These preliminary results are encouraging for developing organic phototransistors for visible light communication.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"317-325"},"PeriodicalIF":2.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10937183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Woo Jin Baek;Joon Pyo Kim;Song Hyeon Kuk;Juhyuk Park;Hyun Soo Kim;Dae-Myeong Geum;Sang Hyeon Kim
{"title":"Field-Effect Passivation of GaN-Based Blue Micro-Light-Emitting Diodes","authors":"Woo Jin Baek;Joon Pyo Kim;Song Hyeon Kuk;Juhyuk Park;Hyun Soo Kim;Dae-Myeong Geum;Sang Hyeon Kim","doi":"10.1109/JEDS.2025.3552171","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3552171","url":null,"abstract":"We demonstrate field-effect passivation (FEP) of GaN-based blue <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> LEDs by incorporating an additional metal-oxide-semiconductor gate structure on the sidewalls. This approach allows for active control of surface band bending at the sidewalls, thereby modulating carrier trapping and de-trapping. We observe that applying a negative gate voltage <inline-formula> <tex-math>$(V_{G})$ </tex-math></inline-formula> facilitates electron de-trapping, leading to a reduction in surface recombination and a corresponding decrease in current, as evidenced by an enhanced external quantum efficiency (EQE). Conversely, applying a positive <inline-formula> <tex-math>$V_{G}$ </tex-math></inline-formula> results in the opposite effect.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"303-307"},"PeriodicalIF":2.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930472","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Optimization of Bilayer InGaSnO and Nitrogen-Doped InSnO Thin-Film Transistors for Enhanced Mobility and Reliability","authors":"Weijie Jiang;Li Lu;Chenfei Li;Wenyang Zhang;Wenzhao Wang;Guoli Li;Jingli Wang;Xingqiang Liu;Ablat Abliz;Da Wan","doi":"10.1109/JEDS.2025.3552454","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3552454","url":null,"abstract":"In this study, high-performance indium gallium tin oxide (IGTO) and nitrogen (N) doped indium tin oxide (ITO) hetero structured bilayer thin-film transistors (TFTs) are prepared by incorporating an N-doped ITO intercalation layer in single-layer IGTO TFTs. The performance of the IGTO/ITO:N bilayer TFTs is significantly improved compared with single-layer IGTO TFTs, with specific indicators including a field-effect mobility of 32.6 cm2/V<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>s, a subthreshold swing of 201 mV/dec, a threshold voltage shifts of 0.21 V and −0.45 V under ±10 V gate-bias stress. The results show that the performance enhancement is due to the rational design of the bilayer structure, in which the ITO layer functions as a charge-accumulation layer, providing additional electrons. Meanwhile, N doping effectively reduces the oxygen vacancies, thereby decreasing the interfacial trap density, and ultimately enhancing the performance of single-layer IGTO TFTs. Through X-ray photoelectron spectroscopy and low-frequency noise analyses, we further confirmed the positive effects of N doping and bilayer structure on reducing the defective states and enhancing the stability of TFTs. Overall, the strategy presented here is effective for preparing high performance oxide TFTs for potential applications in future optoelectronic displays.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"290-296"},"PeriodicalIF":2.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930954","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hsien-Chin Chiu;Chong-Rong Huang;Chia-Han Lin;Chia-Hao Yu;Hsuan-Ling Kao;Shinn-Yn Lin;Barry Lin
{"title":"High Power Added Efficiency Enhancement-Mode Γ-Gate RF HEMT With High/Low p-GaN Doping Profile","authors":"Hsien-Chin Chiu;Chong-Rong Huang;Chia-Han Lin;Chia-Hao Yu;Hsuan-Ling Kao;Shinn-Yn Lin;Barry Lin","doi":"10.1109/JEDS.2025.3551313","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3551313","url":null,"abstract":"<inline-formula> <tex-math>$0.5~mu $ </tex-math></inline-formula>m enhancement-mode (E-mode) p-GaN <inline-formula> <tex-math>$Gamma $ </tex-math></inline-formula>-gate RF HEMT with engineered Mg doping profile in p-GaN layer was studied for high power amplifier application. With high/low Mg doping profile design in p-GaN, the traditional Ti/p-GaN Schottky gate behavior can be transformed to ohmic-gate after 550°C 3 minutes post-gate annealing. The ohmic-gate design of p-GaN HEMT can minimize poole-frenkel (PF) emission thus the flicker noise and current collapse (C.C) can be improved. A better gate-to-channel modulation ability is also obtained due to precipitous C-VG curve of low Mg (<inline-formula> <tex-math>$1times 10{^{{19}}}$ </tex-math></inline-formula>cm-3) doping concentration p-GaN layer. The fabricated device achieves a threshold voltage (VTH) of +1.1 V, and shows a low on-resistance (RON) of <inline-formula> <tex-math>$1.8~Omega cdot $ </tex-math></inline-formula>mm and an off-state breakdown voltage of 206 V. With the engineered Mg doping profile design, a 70% PAE is achieved together with an output power density of 1W/mm at VDS of 10V.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"285-289"},"PeriodicalIF":2.0,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10926554","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Aging Analysis and Degradation Prediction of PLL Circuits in 14-nm FinFET Technology","authors":"Meng Li;Xin Xu;Xianghui Li;Yunpeng Li;Yiqun Shi;Qingqing Sun;Hao Zhu","doi":"10.1109/JEDS.2025.3549754","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3549754","url":null,"abstract":"This work investigates the reliability and aging predictions in a 14-nm FinFET-based analog circuit under high-temperature conditions. Aging simulations and accelerated aging tests were carried out on key devices of phase-locked loop (PLL) circuits, with a focus on the time-power-law exponent (n) of <inline-formula> <tex-math>$Delta $ </tex-math></inline-formula> Vth and temperature activation energy. A coupling phenomenon between hot-carrier injection (HCI) and negative bias temperature instability (NBTI) effects has been found at elevated temperatures, where HCI-induced self-heating effect (SHE) exacerbated the NBTI effects. Device degradation was found to be closely related to the waveform, frequency, and operating temperature. The quasi-static-approximation (QSA) model built with DC stress test data, was employed for device and circuit degradation predictions, and its limitations and applicability were discussed. Additionally, based on AC test data, the QSA model was used to simulate corrections for device and circuit degradation at corresponding frequencies. The results revealed over-predictions of degradation level by a time factor over 10.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"270-277"},"PeriodicalIF":2.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10918946","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shunsuke Shitakata;Hiroshi Oka;Kimihiko Kato;Takumi Inaba;Shota Iizuka;Hidehiro Asai;Takahiro Mori
{"title":"Hot Carrier Degradation in Si n-MOSFETs at Cryogenic Temperatures","authors":"Shunsuke Shitakata;Hiroshi Oka;Kimihiko Kato;Takumi Inaba;Shota Iizuka;Hidehiro Asai;Takahiro Mori","doi":"10.1109/JEDS.2025.3550268","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3550268","url":null,"abstract":"This study experimentally investigated hot carrier degradation (HCD) in Si-MOSFETs at cryogenic temperatures. Stress was applied to the devices at 4 K and 300 K, followed by temperature-dependent characterization from 4 K to 300 K to evaluate the degradation mechanism. The results indicated that at 4 K, the effect of HCD on current-voltage characteristics is attributable to band-edge states, whereas at 300 K, it is primarily due to deep states. Despite the temperature at which HCD occurred, both states are induced simultaneously by hot carriers. Deuterium termination of dangling bonds mitigates HCD even at 4 K, where degradation is caused by band-edge states. These results suggest that the band-edge states and deep states should be considered in conjunction, rather than in isolation, to fully understand the degradation behavior.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"308-316"},"PeriodicalIF":2.0,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10922392","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Koya Okazaki;Takahito Yoshinaga;Nobukazu Teranishi;Atsushi Ono
{"title":"Enhancement of Near-Infrared Sensitivity in Silicon-Based Image Sensors to Oblique Chief Rays via Quasi-Surface Plasmon Resonance","authors":"Koya Okazaki;Takahito Yoshinaga;Nobukazu Teranishi;Atsushi Ono","doi":"10.1109/JEDS.2025.3549721","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3549721","url":null,"abstract":"A silicon-based image sensor is proposed, incorporating plasmonic diffraction gratings tailored to chief ray angles (CRAs), to enhance near-infrared (NIR) sensitivity improvement over a broad range of incident angles. Under quasi-surface plasmon resonance (quasi-SPR) conditions, the metal grating efficiently diffracted incident light into the silicon absorption layer. The period and width of the metal grating were adjusted at each pixel position according to CRAs, thereby improving the NIR sensitivity at sensor edges. The plasmonically diffracted light with angled chief ray was confined within the pixel photodiode. The photon confinement resulted in a significant improvement in absorption of approximately 37% or more, within an incident angle range of 30 degrees at a NIR wavelength of 940 nm and a silicon thickness of 3 μm. The improvement in NIR absorption over a broad incident angle range enhances the sensitivity of the entire sensor chip, representing a significant advancement for NIR cameras.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"278-284"},"PeriodicalIF":2.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10918731","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}