Synergistic semimetal and mesa-architecture engineering for low-resistance contacts in wafer-scale MOCVD MoS2 FETs

Materials Science in Semiconductor Processing · 2026-05-22

Comprehensive understanding of electrical characteristics degradation by contact nonideality and effective width loss-dominated scaling in wet-transferred monolayer MoS2 FETs

Materials Today Advances · 2026-04-12

Glass Interposer-Based Warpage Characterization of 2.5D NPU-HBM Heterogeneous Integration Packages

Transactions of the Korean Society of Mechanical Engineers B · 2026-03-12

본 연구는 NPU(neural processing unit)와 HBM(high bandwidth memory)이 집적된 2.5D 이종 집적패키지 구조를 대상으로, 유리 인터포저(glass interposer) 기반에서 플립칩 본딩과 몰드 언더필(MUF: molded underfill) 공정을 적용한 후 warpage 특성을 분석하였다. 유한요소법을 통해 MUF 및 후성형 경화 공정 후 warpage를 예측하였으며, DIC(digital image correlation)를 이용한 실험적 검증을 수행하였다. warpage 측정 결과, 265.5 μm로 나타났으며 이는 최장변 기준 허용 한계(0.75%)를 만족하였다. 봉지 내부에서는 void가 발생하지 않았고, flow mark가 확인되었으나 구조적 결함은 동반되지 않았다. 이러한 결과는 유리 인터포저가 2.5D 이종 집적 구조에서 warpage 억제와 공정 모니터링 용이성 측면에서 차세대 패키징 플랫폼으로서 높은 가능성을 지님을 보여준다.

Deep learning-optimized bilayer gratings for enhanced MWIR T2SL photodetector polarimetry

2025-01-24

This study presents an innovative approach to designing bilayer linear gratings for high-performance Mid-Wavelength Infrared (MWIR) polarimetry using deep learning techniques. We developed an artificial neural network (ANN) model trained on Finite Element Method (FEM) simulations to predict electromagnetic responses of bilayer grating structures. The model demonstrates high efficiency and accuracy in predicting transmission behavior, significantly reducing computational time. We validate ANN predictions through experimental fabrication and characterization of nanoimprinted bilayer gratings. The study identifies critical geometric parameters influencing transverse magnetic and transverse electric transmission, enabling tailored designs for specific MWIR wavelengths. Integration of optimized bilayer grating structures with MWIR InAs/GaSb Type-II Superlattice (T2SL) photodetectors yields significantly enhanced spectral responsivity and polarization sensitivity. Our approach provides a versatile route for rapidly designing and optimizing metamaterials for high-performance polarizers, offering superior capabilities to resolve linear polarization signatures in various applications.

Enhanced electrical performances with HZO/β-Ga2O3 3D FinFET toward highly perceptual synaptic device application

Materials Science in Semiconductor Processing · 2025-10-01

Metasurfaces for biomedical applications: materials design, optical engineering, and system integration

Biomedical Engineering Letters · 2025-12-29

All‐Dry Self‐Adhesive Soft Electrodes with Subsurface Pores for Long‐Term Skin Recording

Small · 2025-10-25 · 1 citations

Long-term electrophysiological recording remains challenging, particularly on delicate skin, due to reliance on adhesive backings and conductive gels. Here, a class of all-dry, self-adhesive epidermal electrodes is presented by integrating low-density, octopus-like microstructures with porous subsurface architectures. This design offers key advantages, including low electrode-skin impedance, high air permeability, dynamic adhesion to prevent interfacial delamination, and mild adhesion strength for safe-and-easy removal. The electrodes enable stable, high-quality recordings over 24 h, maintaining signal integrity even under repeated skin deformation. Preclinical studies in healthy subjects demonstrate effective electrophysiological monitoring near the wrist and eye for > 24 h, highlighting potential applications in long-term, non-invasive monitoring scenarios such as neonatal intensive care unit monitoring, home healthcare, and sleep studies.

Correction: Rapid Thermal Annealing Under O2 Ambient to Recover the Deterioration by Gamma-Ray Irradiation in a-IGZO TFTs

Electronic Materials Letters · 2025-01-02

Simulational investigation of self-aligned bilayer linear grating enabling highly enhanced responsivity of MWIR InAs/GaSb type-II superlattice (T2SL) photodetector

Scientific Reports · 2024-01-24 · 5 citations

Linear gratings polarizers provide remarkable potential to customize the polarization properties and tailor device functionality via dimensional tuning of configurations. Here, we extensively investigate the polarization properties of single- and double-layer linear grating, mainly focusing on self-aligned bilayer linear grating (SABLG), serving as a wire grid polarizer in the mid-wavelength infrared (MWIR) region. Computational analyses revealed the polarization properties of SABLG, highlighting enhancement in TM transmission and reduction in TE transmission compared to single-layer linear gratings (SLG) due to optical cavity effects. As a result, the extinction ratio is enhanced by approximately 2724-fold in wavelength 3-6 μm. Furthermore, integrating the specially designed SABLG with an MWIR InAs/GaSb Type-II Superlattice (T2SL) photodetector yields a significantly enhanced spectral responsivity. The TM-spectral responsivity of SABLG is enhanced by around twofold than the bare device. The simulation methodology and analytical analysis presented herein provide a versatile route for designing optimized polarimetric structures integrated into infrared imaging devices, offering superior capabilities to resolve linear polarization signatures.

List of contributors

Elsevier eBooks · 2024-01-01