Electric Property And Design Of Embedded Capacitor

Compare with the design technology of traditional Discrete capacitors, thetechnology of embedded capacitor can improve the effectiveness of thepackage, enhance electric performance of device and reduce the cost ofelectronics assembly. The technology of embedded capacitor has a importanteffect on microelectronics technology. Dielectric materials are the importantpart of embedded capacitor and the property of dielectric materials decide onthe performance of embedded capacitor. Compound ceramic nanoparticle withpolymer and utilize the advantage of ceramic nanoparticle and polymer, suchas high dielectric constant of ceramic particle and flexibility of polymer, highquality of embedded capacitor can be manufactured using laminated andmicroelectronic technology.In this paper, polyimide and epoxy resin have been chosen as the polymermatrix and BaTiO3nanoparticle as the filler. The embedded capacitors have been prepared through lamination and minus layer method. Microstructure ofdielectric film and the influence of microstructure on dielectric property havebeen studied. The dielectric property of embedded capacitors has been alsostudied at different frequency and temperature. The results show thatembedded capacitors of different polymer matrix have better dielectricproperty prepared through lamination and minus layer method. In thefrequency range of100Hz~1MHz, dielectric constant of embedded capacitorof BT/EP achieve18. dielectric loss＜0.02, dielectric strength is24V/μm. Ithas better temperature stability in the range of-30℃~100℃. The dielectricconstant of embedded capacitor of BT/PI reach30, dielectric loss is below0.05and dielectric strength is210V/μm. It also has better temperature stabilityin the range of-50℃~150℃. Experimental results show that the embeddedcapacitors with BT/EP and BT/PI dielectric films can be effective used inmicroelectronic technology.