Application field of conductive adhesive
Time
2023-03-13 16:33
Source:
1) Conductive adhesives are used for microelectronics assembly, including the connection of fine wires with printed lines, plating plates, metal layers of ceramic adhesives, metal chassis, bonding wires with tube seats, bonding elements with flat faces across printed lines, bonding waveguide tuning and hole repair.
(2) conductive adhesives are used to replace spot welding where the welding temperature exceeds the tolerance of oxide film formed by welding. As an alternative to solder, conductive adhesives are mainly used in telephone and mobile communication systems; Radio, television, computer and other industries; The automobile industry; Medical equipment; Solve electromagnetic compatibility (EMC) and other aspects.
(3) Another application of conductive adhesives is to bond electrodes to magnet crystals in ferroelectric devices. Conductive adhesives can replace welding flux and crystal due to welding temperature tend to deposit. The bonding of battery terminals is another use for conductive adhesives when the welding temperature is unfavorable.
(4) conductive adhesives can form joints of sufficient strength, so they can be used as structural adhesives.
In the domestic market, conductive adhesives used in some advanced fields are mainly imported: Ablistick company and 3M company from the United States occupied almost all the IC and LED fields, and Sumitomo of Japan and Yihua of Taiwan were also involved in these fields. Japan's Three-Bond controls the entire application of conductive adhesives in quartz crystal resonators. Domestic conductive adhesive is mainly used in some middle and low grade products, this market is mainly occupied by the metal research institute.
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Composition of conductive adhesive
The conductive adhesive is mainly composed of resin matrix, conductive particles, dispersing additives and auxiliaries. The matrix mainly includes epoxy resin, acrylic resin, polychloride ester and so on. Although the highly conjugated type of polymer structure itself also has electrical conductivity, such as macromolecular pyridine structure, can conduct electricity through electrons or ions, but the conductivity of this kind of conductive adhesive can only reach the degree of semiconductor, can not have low resistance like metal, difficult to play the role of conductive connection. The conductive adhesive used on the market is mostly filler type.
Conduction principle of conductive adhesive
Form a conductive path, so that the conductive adhesive has electrical conductivity, the stable contact between the particles in the adhesive layer is caused by the conductive adhesive curing or drying. Conductive adhesive before curing or drying, conductive particles are separated in the adhesive, there is no continuous contact with each other, so in the state of insulation. Conductive adhesive curing or drying, due to solvent volatilization and adhesive curing caused by the shrinkage of the adhesive volume, the conductive particles between each other is stable continuous state, thus showing electrical conductivity.
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Congratulations Wenzhou Huike Printing Materials Co., LTD. Website new revision success.
Congratulations Wenzhou Huike Printing Materials Co., LTD. Website new revision success.