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Related Concept Videos

Bonding in Metals02:32

Bonding in Metals

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Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
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Electrodeposition01:08

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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Bonding and Strength of Aggregate01:12

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The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
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Biasing of Metal-Semiconductor Junctions01:27

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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Updated: Jul 18, 2025

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
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Copper Wire Bonding: A Review.

Hongliang Zhou1, Andong Chang1, Junling Fan2

  • 1School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454000, China.

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|August 26, 2023
PubMed
Summary
This summary is machine-generated.

This review covers copper (Cu) wire bonding, detailing wire types, Free Air Ball (FAB) morphology impacts, and reliability factors like intermetallic compounds and corrosion. It also explores simulation applications and future research directions for Cu wire bonding technology.

Keywords:
Cu wire bondingFAB morphologyapplications of simulationsbonding reliabilityintermetallic compounds

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Semiconductor Manufacturing

Background:

  • Copper (Cu) wire bonding is a critical interconnect technology in semiconductor packaging.
  • Understanding Cu wire characteristics and bonding processes is essential for device reliability.

Purpose of the Study:

  • To provide a comprehensive review of copper (Cu) wire bonding.
  • To analyze factors affecting Cu wire bond reliability and explore simulation applications.

Main Methods:

  • Literature review of Cu wire types, Free Air Ball (FAB) morphology, intermetallic compounds, and corrosion.
  • Analysis of simulation techniques like finite element analysis and molecular dynamics.

Main Results:

  • Detailed discussion on bare, coated, insulated, and alloyed Cu wire types and their applications.
  • Insights into FAB morphology's effect on bond strength and formation.
  • Evaluation of intermetallic compounds and corrosion impacts on bonding reliability.

Conclusions:

  • Cu wire bonding reliability is influenced by material properties, process parameters, and environmental factors.
  • Simulation tools are crucial for understanding bonding mechanisms and predicting failures.
  • Future research should focus on advancing Cu wire bonding technologies and addressing reliability challenges.