Conductive thin film materialIt refers to thin films with conductive properties that can be used to make various electrical and electronic components. It includes metal foil (such as copper foil, aluminum foil), metal strip (such as steel strip, stainless steel strip), and semiconductor base film.
Conductive thin film materials are important functional materials that typically have properties such as conductivity and flexibility, and are widely used in fields such as electronics, power, lighting, and glass.
The main preparation methods of conductive thin film materials include metal coatings, conductive polymers, and conductive fillers. Among them, conductive polymer is a new type of conductive material prepared through polymerization reaction, which has high conductivity and low resistivity. Common conductive polymers include polyaniline, polythiophene, polyaniline/nanocomposites, etc.
Conductive thin film materialIt has wide applications in fields such as electronics, power, lighting, and glass. For example, in electronic products, conductive thin film materials can be used to make electrode materials, conductive adhesives, and other components; In the field of electricity, conductive thin film materials can be used to make transformers, cable insulation layers, etc; In the field of glass, conductive thin film materials can be used to make optoelectronic devices, optical components, etc.
1. Metal foil: In electrical products, the most widely used are silver/gold/copper/iron alloys. Due to the different electrical resistivity of these metals, their conductivity also varies.
Among them:
(1) Pure silver: low resistivity, but high price.
(2) Pure copper: high resistivity, but low cost.
(3) Iron: It has the lowest cost, but the highest resistivity and is prone to oxidation.
2. Metal strip: Commonly used ones include:
(1) Tin plated copper is the most widely used amorphous soft magnetic material. Its characteristics are high magnetic permeability, low coercivity, good temperature stability, corrosion resistance, and radiation resistance.
(2) Aluminum nickel cobalt permanent magnet alloy: It is currently the best performing soft magnetic material. Its characteristics are: high magnetic field strength, high saturation magnetization, high coercivity, and stable temperature.
3. Semiconductor base film: Commonly used ones include:
(1) Silicon: Silicon is the earliest discovered semiconductor, with the highest carrier mobility and the largest bandgap width. So, insulating materials made from single crystal or polycrystalline silicon substrates can be used to create new electronic components with small volume and high density.
(2) Germanium: It is a chemical element with an atomic number of 74, belonging to the alkaline earth group. It is a solid at room temperature and easily melted. The specific heat capacity of germanium at room temperature is lower than that of carbon. Therefore, under low temperature conditions, the thermal expansion coefficient of germanium is inversely proportional to temperature, and thermosensitive ceramics can be made.
(3) Arsenide: It is a type of apatite mineral containing arsenic element, which is in a solid state at room temperature and pressure. After high temperature heating, it becomes gas. This substance has a high refractive index and can be used as an optical fiber.
It should be noted that the performance of conductive thin film materials is influenced by factors such as preparation methods, structural performance parameters, and performance indicators. Therefore, in practical applications, it is necessary to choose appropriate preparation methods and indicators according to specific situations to ensure the performance and quality of conductive thin film materials.
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