Micromachines最新文献_第3页

Fabrication and Dose-Response Simulation of Soft Dual-Sided Deep Brain Stimulation Electrode. 软质双面脑深部刺激电极的制备及剂量响应模拟。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-18 DOI: 10.3390/mi16080945

Jian Zhang, Bei Tong, Changmao Ni, Dengfei Yang, Guoting Fu, Li Huang

{"title":"Fabrication and Dose-Response Simulation of Soft Dual-Sided Deep Brain Stimulation Electrode.","authors":"Jian Zhang, Bei Tong, Changmao Ni, Dengfei Yang, Guoting Fu, Li Huang","doi":"10.3390/mi16080945","DOIUrl":"https://doi.org/10.3390/mi16080945","url":null,"abstract":"A 16-channel dual-sided flexible electrode based on a polyimide substrate was designed and fabricated using micro-electromechanical system (MEMS) technology. The electrode exhibited an average impedance of 5.9 kΩ at 1 kHz and a charge storage capacity (CSC) of 10.63 mC/cm2. Concurrently, a three-dimensional finite element model incorporating electrical stimulation and micromotion-induced damage was established. The simulation results demonstrated that the implantation trauma caused by the bilateral electrode was significantly lower compared with silicon-based and cylindrical electrodes, while also enabling directional stimulation. Furthermore, leveraging the design of experiments (DOE) methodology, a multivariate regression model was developed to investigate the influence of key stimulation parameters-namely, current amplitude, frequency, and pulse width-on the volume of tissue activated (VTA). The results indicated that the regression model provided accurate predictions of VTA (R2 = 0.912). Among the parameters, current amplitude and pulse width exerted a statistically significant influence on VTA size (p < 0.001), whereas the effect of frequency was comparatively minor (p = 0.387 > 0.05). This study presents the first successful fabrication and comprehensive dose-response analysis of a flexible bilateral DBS electrode. Its attributes of low implantation trauma, multi-channel capability, and directional stimulation offer a novel paradigm for precise neuromodulation. Additionally, the established stimulation parameter-VTA response model provides a robust theoretical foundation for optimizing therapeutic parameters in subsequent clinical applications.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388741/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960674","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}

引用次数: 0

Investigation on the Interfacial Delamination of Glass Substrate Packaging Using Cohesive Zone Models. 基于内聚带模型的玻璃基板封装界面分层研究。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-18 DOI: 10.3390/mi16080944

Tianzuo Qin, Wen Yang, Qiqin Wei, Zhangsen Cen, Jianquan Chen, Yi Xie, Huiping Tang, Daoguo Yang

{"title":"Investigation on the Interfacial Delamination of Glass Substrate Packaging Using Cohesive Zone Models.","authors":"Tianzuo Qin, Wen Yang, Qiqin Wei, Zhangsen Cen, Jianquan Chen, Yi Xie, Huiping Tang, Daoguo Yang","doi":"10.3390/mi16080944","DOIUrl":"https://doi.org/10.3390/mi16080944","url":null,"abstract":"This study aligns with the development trend of glass substrate packaging. The research aims to analyze the delamination of the substrate-adhesive layer-chip trilayer structure in packaging through experimental testing to obtain interface strength parameters. Subsequently, an iterative process combining experiments and simulations was applied to establish a cohesive zone model characterizing crack initiation and propagation. Finally, reliability analysis of the packaging structure was conducted. The results indicate that the load-displacement curves during sample loading can be experimentally acquired, enabling the determination of critical load values triggering interface delamination. The specific locations of delamination within the packaging structure are also clearly observed. Through simulation fitting, cohesive parameters reflecting interface strength are obtained, which serve as the basis for evaluating interface delamination fractures. Furthermore, applying the calibrated cohesive parameters to the established glass substrate model, simulation analysis evaluates delamination risks under thermal conditions.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388586/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960608","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}

引用次数: 0

A 28 mK Resolution, -0.45 °C/+0.51 °C Inaccuracy Temperature Sensor Using Dual-Comparator Architecture and Logic-Controlled Counting Method. 一种28 mK分辨率，-0.45°C/+0.51°C误差温度传感器，采用双比较器结构和逻辑控制计数方法。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-18 DOI: 10.3390/mi16080947

Yubin Xu, Tongyu Luo, Lin Peng

引用次数: 0

Editorial for This Special Issue on Energy Conversion Materials and Devices and Their Applications. 《能量转换材料、器件及其应用》特刊社论。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-17 DOI: 10.3390/mi16080943

Bin Liu, Yaling Wang, Lei Liu

引用次数: 0

Design Strategies for Optimized Bulk-Linearized MOS Pseudo-Resistor. 优化体线性化MOS伪电阻器设计策略。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-16 DOI: 10.3390/mi16080941

Lorenzo Benatti, Tommaso Zanotti, Francesco Maria Puglisi

引用次数: 0

Study of an Ultra-Low-Frequency Inertial Vibration Energy Harvester with a Frequency Up-Conversion Approach. 一种上变频的超低频惯性振动能量采集器的研究。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-16 DOI: 10.3390/mi16080942

Jun Chen, Jieliang Xu, Mingjie Guan, Ziqiao Shen, Zilong Cheng

{"title":"Study of an Ultra-Low-Frequency Inertial Vibration Energy Harvester with a Frequency Up-Conversion Approach.","authors":"Jun Chen, Jieliang Xu, Mingjie Guan, Ziqiao Shen, Zilong Cheng","doi":"10.3390/mi16080942","DOIUrl":"https://doi.org/10.3390/mi16080942","url":null,"abstract":"For ultra-low-frequency vibration applications, this study focuses on a piezoelectric energy harvesting system with a spring mass system, utilizing magnetic plucking to up-convert the frequency. The proposed spring mass system includes a spring, a magnet mass with a guide rail, and a fixed pulley. The spring mass system responds to external ultra-low-frequency excitation and transfers the vibration to the piezoelectric cantilever beam through the magnets, achieving frequency up-conversion. The theoretical model of the designed piezoelectric energy harvesting system is established, and the effects of magnetic forces and potential energy between the magnets are analyzed. Numerical analysis and experimental studies demonstrate that the proposed piezoelectric energy harvesting system can efficiently achieve frequency up-conversion and generate a higher output power under the conditions of sinusoidal excitation at a frequency of 1 Hz and an amplitude of 40 mm. The system exhibits its highest power output with a magnetic distance of 15 mm, resulting in a maximum output power of 57.35 μW. Finally, to verify the performance of the designed energy harvester in low-velocity water flow, a series of underwater experiments were carried out. The results show that the designed harvester can generate an output power of 23.73 μW with optimal resistance of 250 kΩ at a flow rate of 0.371 m/s. The designed structure is well suited for energy harvesting in flow-induced vibration in low-velocity water flow.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388336/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960795","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}

引用次数: 0

Advances in 3D Printing: Microfabrication Techniques and Forming Applications. 3D打印的进展：微加工技术和成型应用。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-15 DOI: 10.3390/mi16080940

Di Pan, Fanghui Jia, Muyuan Zhou, Hao Liu, Jingru Yan, Lisong Zhu, Ming Yang, Zhengyi Jiang

{"title":"Advances in 3D Printing: Microfabrication Techniques and Forming Applications.","authors":"Di Pan, Fanghui Jia, Muyuan Zhou, Hao Liu, Jingru Yan, Lisong Zhu, Ming Yang, Zhengyi Jiang","doi":"10.3390/mi16080940","DOIUrl":"https://doi.org/10.3390/mi16080940","url":null,"abstract":"Stainless steel is essential in high-performance industries due to its strength, corrosion resistance, and biocompatibility. However, conventional manufacturing methods limit material efficiency, design complexity, and customization. Additive manufacturing (AM) has emerged as a powerful alternative, enabling the production of stainless-steel components with complex geometries, tailored microstructures, and integrated functionalities. Key AM methodologies, including laser powder bed fusion (L-PBF), binder jetting, and directed energy deposition (DED), are evaluated for their effectiveness in producing stainless-steel components with optimal performance characteristics. This review highlights innovations in stainless-steel AM, focusing on microfabrication, multi-material approaches, and post-processing strategies such as heat treatment, hot isostatic pressing (HIP), and surface finishing. It also examines the impact of process parameters on microstructure, mechanical anisotropy, and defects. Emerging trends include AM-specific alloy design, functionally graded structures, and AI-based control. Applications span biomedical implants, micro-tooling, energy systems, and automotive parts, with emphasis on microfabrication for biomedical micromachines and precision microforming.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388489/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960624","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}

引用次数: 0

Effect of Clear Corneal Incisions via Femtosecond Laser Versus Manual Incisions on Corneal Aberrations in Cataract Surgery. 飞秒激光清角膜切口与手工切口对白内障手术中角膜畸变的影响。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-15 DOI: 10.3390/mi16080939

Vesko Onov, Gabriele Thumann, Martina Kropp, Zeljka Cvejic, Filip Slezak, Bojan Pajic

{"title":"Effect of Clear Corneal Incisions via Femtosecond Laser Versus Manual Incisions on Corneal Aberrations in Cataract Surgery.","authors":"Vesko Onov, Gabriele Thumann, Martina Kropp, Zeljka Cvejic, Filip Slezak, Bojan Pajic","doi":"10.3390/mi16080939","DOIUrl":"https://doi.org/10.3390/mi16080939","url":null,"abstract":"This study aimed to evaluate whether clear corneal incisions (CCIs) created with the FEMTO LDV Z8 femtosecond laser during cataract surgery are non-inferior to manual CCIs in terms of surgically induced astigmatism (SIA) and higher-order aberrations (HOAs). A total of 78 cataract patients were randomly assigned to two groups: 38 eyes underwent femtosecond laser-assisted cataract surgery (FLACS), and 40 eyes underwent conventional manual cataract surgery (CCS). Preoperative and six-week postoperative SIA, HOAs, and all topographic and refractive data were analysed for both groups. FLACS-generated CCIs demonstrated equivalence to manual CCIs. The mean SIA was 0.44 ± 0.27 dioptres (D) in the FLACS group and 0.58 ± 0.46 D in the CCS group (p = 0.18), with lower variability in the FLACS group. The root mean square (RMS) corneal HOA at six weeks was 0.69 ± 0.17 µm in the FLACS group and 0.80 ± 0.56 µm in the CCS group (p > 0.05). These results confirm the efficacy, reproducibility, and safety of FLACS. Although not statistically significant, FLACS induced numerically lower SIA values and less variability than manual CCIs. Both groups were comparable in terms of HOAs, though higher mean values and variability were observed in the CCS group.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388711/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960622","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}

引用次数: 0

Design of a Dual-Band Low-Noise Amplifier with a Novel Matching Structure. 一种新型匹配结构的双频低噪声放大器的设计。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-15 DOI: 10.3390/mi16080938

Mingwen Zhang, Zhiqun Cheng, Tingwei Gong, Bangjie Zheng, Zhiwei Zhang, Xuefei Xuan

引用次数: 0

Multi-Objective Optimization of Surface Roughness, Cutting Force, and Temperature in Ultrasonic-Vibration-Assisted Milling of Titanium Alloy. 超声振动辅助铣削钛合金表面粗糙度、切削力和温度的多目标优化。

IF 3 3区工程技术

Micromachines Pub Date : 2025-08-14 DOI: 10.3390/mi16080936

Gaofeng Hu, Yanjie Lu, Shengming Zhou, Xin He, Fenghui Zhang, Pengchao Zhu, Mingshang Wang, Taowei Tan, Guangjun Chen

{"title":"Multi-Objective Optimization of Surface Roughness, Cutting Force, and Temperature in Ultrasonic-Vibration-Assisted Milling of Titanium Alloy.","authors":"Gaofeng Hu, Yanjie Lu, Shengming Zhou, Xin He, Fenghui Zhang, Pengchao Zhu, Mingshang Wang, Taowei Tan, Guangjun Chen","doi":"10.3390/mi16080936","DOIUrl":"https://doi.org/10.3390/mi16080936","url":null,"abstract":"Titanium alloys (Ti-6Al-4V) are widely used in the aerospace field. However, as a typical difficult-to-machine material, titanium alloys have a low thermal conductivity, a high chemical activity, and a significant adiabatic shear effect. In conventional milling (CM), the temperature in the cutting zone rises sharply, leading to tool adhesion, rapid wear, and damage to the workpiece surface. This article systematically investigated the influence of process parameters on the surface roughness, cutting force, and cutting temperature in the ultrasonic-vibration-assisted milling (UAM) process of titanium alloys, based on which multi-objective optimization process of the milling process parameters was conducted, by utilizing the grey relational analysis method. An orthogonal experiment with four factors and four levels was conducted. The effects of various process parameters on the surface roughness, cutting force, and cutting temperature were systematically analyzed for both UAM and CM. The grey relational analysis method was employed to transform the optimization problem of multiple process target parameters into a single-objective grey relational degree optimization problem. The optimized parameter combination was as follows: an ultrasonic amplitude of 6 μm, a spindle speed of 6000 rpm, a cutting depth of 0.20 mm, and a feed rate of 200 mm/min. The experimental results indicated that the surface roughness Sa was 0.268 μm, the cutting temperature was 255.39 °C, the cutting force in the X direction (FX) was 5.2 N, the cutting force in the Y direction (FY) was 7.9 N, and the cutting force in the Z direction (FZ) was 6.4 N. The optimization scheme significantly improved the machining quality and reduced both the cutting forces and the cutting temperature.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 8","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12388664/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144960611","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}

引用次数: 0