In this paper, we proposed a simultaneous switching noise(SSN) reduction technique in muti-layer beards(MLB) for high-speed digital applications and analyzed them using the Finite Difference Time Domain(FDTD) method. The new method by conductive dielectric substrates reduces SSN couplings and resonances, significantly, which cause series malfunctions in the modem high-speed digital applications.

The $Li_2O-MgO-MgF_2-SiO_2$glasses with addition of $B_2O_3$ were investigated in order to make glass-ceramics for low temperature firing substrate. Glasses were made by melting at $1450^{\circ}C$ in the electronic furnace and crystallized at $750^{\circ}C$. After the crystallization, crystal phases and microstructure were observed. The crystal phases were polycrystalline of lithium boron fluorphlogopite and lithium fluorhectorite. The crystal shape was changed to grande type from needle type with the increase in $B_2O_3$ contents. Average particle size of the glass-ceramics aftar water swelling was $3.77{\mu}{\textrm}{m}$. The optimum sintering temperature and sintering shrinkage of the substrate were $900^{\circ}C$ and 13.4vol%, respectively.

페트롤리엄 피치와 콜타르 피치를 열분해하여 제조한 카본을 리튬이차전지용 부극재료로 사용한 반쪽전지를 제작하여 전극의 충방전 용량 및 cycle 특성, 카본의 열처리 온도와 용량과의 관계에 대하여 고찰하였다. 열처리 온도가 증가함에 따라 초기 충방전 용량은 콜타르 피치 카본의 경우 현저한 증가를 보였으며 페트롤리엄 피치 카본에서는 지속적인 증가를 보이다가 100$0^{\circ}C$ 이상의 온도부터는 다소 감소하는 경향을 나타내었다. 또한, 충방전 횟수가 증가할수록 충전용량은 감소하지만, 가역특성(reversibility)은 90% 이상으로 향상되었다.