Kratek uvod
Conductive paste is the foundation for the development of electronic components and a key material for packaging, electrodes and interconnection. It is a high-tech electronic functional material integrating metallurgy, chemical engineering and electronic technology, mainly used in various fields of the electronics industry such as manufacturing thick film integrated circuits, sensitive components, capacitors, potentiometers, thick film hybrid Integrirana vezja in tehnologija površinskega pritrditve . prevodne paste vključujejo dve glavni kategoriji: prevozne prevodne paste in prevodne prevodne lepila (prevodna črnila) . Prevodna prevodna pasta, ki jo je mogoče izgorevati Embalaža elektronskih naprav itd. . Temperatura, ki jo je mogoče izgorevanje, je običajno okoli 500-1000 stopinj . prevodne lepila se v glavnem uporabljajo v žicah fleksibilnih tokokrogov in elektronskih embalaže itd.
Kompozicija
Sintered conductive paste is a type of paste with wide application and large consumption in the electronics industry. Its composition mainly consists of three parts: inorganic binder, conductive filler and organic carrier in a certain proportion. Inorganic adhesives, also known as glass powder, are generally made by melting and mixing SiO2 and some metal oxides in a certain proportion, and must be Preden se proizvajajo . prevodna polnila, so na splošno sestavljeni iz dragocenih kovin, kot so ru, pd, au, ag in bazne kovine, kot so cu, ni, zn, al itd. na njihovi površini .
Če se te kovine dodajo v prevodno pasto in sintrajo pri visokih temperaturah, je večja verjetnost, da bodo oksidirali, kar bo neizogibno vplivalo slurry. Good leveling property means that after sealing, the slurry will be dense and free of pores, and its electrical performance will be relatively stable. Conversely, if the leveling property of the slurry is poor, various defects such as holes and cracks will occur after sintering, thereby resulting in poor electrical performance of the sealing system. At present, Organski nosilci, ki se običajno uporabljajo, so na splošno epoksi smola, terpentinski alkohol, etilna celuloza itd. .
Prevodni mehanizem
Sintrana prevodna kaše je sestavljena predvsem iz anorganskih veziva, prevodnih polnil, organskih nosilcev in drugih funkcionalnih dodatkov . po nizkotemperaturnem sušenju in visokotemperaturnem sintranju, samo anorganske vezive in prevodne polnila ostanejo v sliki .
The inorganic binder plays a connecting role. After high-temperature sintering and cooling, the high-temperature sintered conductive slurry shrinks, allowing the conductive particles to come into contact with each other and thus conduct electricity. Similarly, Chemicalbook conductive adhesives conduct electricity due to the shrinkage of polymers such as epoxy resin after curing, causing the Prevodna polnila, ki pridejo v stik med seboj ., ne glede na to, ali je sintrana prevodna pasta ali ozdravljena prevodna lepila, so neprevodna pred visokotemperaturno sintranjem in ozdravljenjem .
Glavni razlog je, da prevodni delci ne pridejo v stik med seboj in se ne oblikujejo noben prevodni kanali . šele po infiltraciji ali ozdravitvi visokotemperature naredi obliko prevodne kanale, tako da vodi elektriko .
Postopek priprave
Postopek priprave sintrane prevodne paste je kot primer, da ponazori postopek priprave paste . najprej tehta srebrni prah in stekleni prah glede na to, da je formula . po tem, ko temeljito mešajo srebrni prah in stekleni prah, v organski prevoz Srebrna pasta, ker porazdelitev vsake komponente v pasti ni dovolj enakomerna in jo je treba homogenizirati ., je v glavnem homogenizirana in izpopolnjena z metodami, kot so rezkanje kroglic ali tri-rolo
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Glavni parametri zmogljivosti
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Nj Možnost je preučiti površinsko napetost stekla, ko se stopi . Dobra zmožnost je pogoj za učinkovito širjenje, ta pogoj
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