W. D. Chang

ORCID: 0009-0001-0946-6670
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Magnetic properties of thin films
  • Magnetic Properties and Applications
  • Metal and Thin Film Mechanics
  • Advancements in Battery Materials
  • Magneto-Optical Properties and Applications
  • Metallic Glasses and Amorphous Alloys
  • Diamond and Carbon-based Materials Research
  • Silicon and Solar Cell Technologies
  • Perovskite Materials and Applications
  • Integrated Circuits and Semiconductor Failure Analysis
  • Electron and X-Ray Spectroscopy Techniques
  • Manufacturing Process and Optimization
  • Visual Attention and Saliency Detection
  • Microstructure and Mechanical Properties of Steels
  • Advanced Surface Polishing Techniques
  • Advanced Sensor and Energy Harvesting Materials
  • Characterization and Applications of Magnetic Nanoparticles
  • Non-Destructive Testing Techniques
  • 2D Materials and Applications
  • ZnO doping and properties
  • Advanced Battery Technologies Research
  • Advanced Materials Characterization Techniques
  • Magnetic Properties and Synthesis of Ferrites
  • MXene and MAX Phase Materials
  • Multiferroics and related materials

National Tsing Hua University
1993-2025

National University of Kaohsiung
2024

Tatung University
2024

National Synchrotron Radiation Research Center
1996-1999

Multisensory cooperative localization has emerged as a promising approach to enhance positioning accuracy in vehicular ad-hoc networks (VANETs). This paper proposes sensor fusion algorithm that integrates global navigation satellite system (GNSS), radar, and received signal strength indicator (RSSI) measurements refine current using both present historical measurements. To emphasize the differing levels of importance between localization, proposed combines capabilities long short-term memory...

10.1109/jsen.2024.3524866 article EN IEEE Sensors Journal 2025-01-01

Accurately estimating the state of charge lithium-ion batteries has become a crucial challenge in development battery management systems within electric vehicle industry. To address this issue, numerous studies have explored various solutions, which can be categorized into two main approaches: 1) model derivation coupled with filter design, and 2) data collection for system identification. Ensuring high accuracy real-time applicability are vital requirements successful development. The paper...

10.1109/access.2024.3389969 article EN cc-by-nc-nd IEEE Access 2024-01-01

Ferrimagnetic Mn4N films were deposited on Si (100) substrate by dc reactive magnetron sputtering from sintered Mn target. Highly (002) textured ordered phase is formed in situ at studied temperatures of 150–250 °C without further annealing. Anomalous perpendicular magnetoanisotropy exists these face-centered cubic with larger coercivity measured to the film (2000–3000 Oe) than that parallel (1100–1300 Oe), as remanence. Coercivity either direction decreases, while saturation flux density...

10.1063/1.358200 article EN Journal of Applied Physics 1994-11-15

Conventional x-ray diffraction failed to provide correct information on alloying of materials made elements with close lattice parameters, even for commonly accepted have miscibility. Using anomalous scattering, we showed that nanostructured NiCo films did not necessarily form solid solution as expected from their phase diagram or suggested by the results conventional diffraction.

10.1063/1.125062 article EN Applied Physics Letters 1999-10-18

Thin Fe3O4 films were deposited in situ on Si(100) substrates by dc-reactive magnetron sputtering method, and then γ-Fe2O3 thin obtained post-oxidation treatment. The effect of residual stress coercivity these was studied a bending-beam method. In stress-temperature curves the taken during whole heat treatment processes revealed magnitude state film stresses. measured increments (470 Oe) are very close to value (460 calculated based stress-induced anisotropy for with pure phase. For mixed...

10.1063/1.358983 article EN Journal of Applied Physics 1995-02-01

(Co,Mn) modified gamma -Fe/sub 2/O/sub 3/ thin films with an in-plane coercivity of 2200 to 4000 Oe, a saturation magnetization 250 310 emu/cm/sup 3/, and squareness ratio 0.6 0.83 were prepared by DC-reactive magnetron sputtering. The deposited onto Si

10.1109/20.281268 article EN IEEE Transactions on Magnetics 1993-11-01

The die bonding process is one of the most critical steps in front-end semiconductor packaging process, as it significantly affects yield entire IC process. This research aims to find an efficient, intelligent vision detection model identify whether each chip correctly adheres substrate; by utilizing classify type defects occurring bond images, engineers can analyze leading causes, enabling timely adjustments key machine parameters real-time, improving and reducing manufacturing cost losses....

10.3390/electronics13224573 article EN Electronics 2024-11-20

Undoped thin /spl gamma/-Fe/sub 2/O/sub 3/ films were deposited in-situ on Si substrate under well controlled O/sub 2/ partial pressure by dc-reactive magnetron sputtering Fe/sub 3/O/sub 4/ phase then oxidation to become the maghemite at 360/spl deg/C for 10 min. The coercivity of as-deposited magnetite is around 400/spl sim/640 Oe. After 320-360/spl minutes, transform completely, and increased 1/spl sim/4 times 640/spl sim/2100 Oe, depending oxygen flow rate during deposition thermal...

10.1109/20.538709 article EN IEEE Transactions on Magnetics 1996-01-01

Thin (Fe,Co,Mn)/sub 3/O/sub 4/ films were deposited in-situ on a Si substrate under well controlled O/sub 2/ partial pressure by dc-reactive magnetron sputtering. The coercivity of as-deposited magnetite is around 400/spl sim/640 Oe. After oxidation at 360/spl deg/C for 90 minutes, the transform to maghemite /spl gamma/-(Co,Mn,Fe)/sub 2/O/sub 3/ completely, and increased 1/spl sim/7 times 640/spl sim/3500 Oe, depending target composition. origin enhancement attributed magneto-anisotropy...

10.1109/20.490151 article EN IEEE Transactions on Magnetics 1995-01-01

10.1109/intmag.1993.642419 article EN [1993] Digests of International Magnetics Conference 1993-01-01
Coming Soon ...