High volumetric capacitance low fired X7R MLC capacitor

A new low fired, high permittivity (K 4400) X7R dielectric suitable for use in MLC capacitors with active layer thickness of 10 /spl mu/ or less has been developed. The dielectric is based on fine grain barium titanate powder with small amount of sintering aid to promote densification of the MLCs at or below 1100/spl deg/C. 70Ag/30Pd was used for the internal electrode. MLCs in 0805-130 nF and 1206-330 nF chips gave an active volumetric capacitance in excess of 6000 /spl mu/F/in/sup 3/. The following is a summary of the properties: fired density /spl ap/97.5% of theoretical; aging rate at 25/spl deg/C is -2.0% per decade; insulation resistance at 100 volts at 25/spl deg/C, 2 minutes /spl ap/10/sup 5/ ohm-farad; ultimate dielectric breakdown /spl ap/100 V//spl mu/.<>