为了满足目前精细电路板制作的需要,研制了一种含纳米银的光固化导电油墨,并研究了纳米银对双重固化和电导率的影响.通过将均一分散的纳米银溶液与光固化树脂、光引发剂和热引发剂混合来配制油墨.固化过程包括光固化和热固化两步.纳米银粉的添加量以及热处理的条件对电子率都有影响.结果表明:纳米银粉为固含量的70%时制得的导电油墨在200℃下处理5min,电阻率可达5×10~(-6)Ω·cm.
A UV curable conductive ink containing silver ( Ag) nanoparticles was developed so as to satis-fy the requirement of the ultra - fine PCB manufacturing presently, and the effects of Ag nanoparticles on dual - curing process and electrical conductivity were studied. The ink was prepared by uniformly dis-persed Ag nanopartilces in organic solvent mixing with UV curable polymer, photoinitiator and thermal in-itiator. The curing process of the ink included UV curing and thermal curing and therefore it was a dual - curing process. Both Ag nanoparticles content and heat treatment conditions affected electrical resistivi-ty. Electrical resistivity of the ink decreased to as low as 5 ×10 (-6)Ω·cm by using 70% silver nanoparti-cles and heat treat at 200 oC for 5 min.
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