Composite dielectric composition having small variation of capacitance with temperature and signal-matching embedded capacitor prepared using the same

A composite dielectric composition for a signal-matching embedded capacitor comprising:

• a mixture of a polymer matrix selected from the group consisting of a polyethylene terephthalate resin, a polyimide resin and any combination thereof and exhibiting a positive variation of capacitance with temperature;
• and
• a ceramic filler having MO6 group(s) or a Perovskite structure and exhibiting a negative variation of capacitance with temperature which is reciprocal to that of the polymer matrix,
• wherein the mixture of polymer matrix and ceramic filler has variation of capacitance with temperature, ΔC/C×100(%) (C:
• Capacitance at 25° C., and ΔC:
• different of capacitance at a temperature range from −55 to 125° C. and at 25° C.), of not more than 5%.

A composite dielectric composition for a signal-matching embedded capacitor comprising:

• a mixture of a polymer matrix selected from the group consisting of a Teflon resin and/or a bismaleimide-methylenedianiline polyimide resin and exhibiting a negative variation of capacitance with temperature;
• and
• a ceramic filler selected from the group consisting of barium titanate, lanthanum titanate, magnesium titanate and any combination thereof and exhibiting a positive variation of capacitance with temperature which is reciprocal to that of the polymer matrix,
• wherein the mixture of polymer matrix and ceramic filler has variation of capacitance with temperature, ΔC/C×100(%) (C:
• Capacitance at 25° C., and ΔC:
• different of capacitance at a temperature range from −55 to 125° C. and at 25° C.), of not more than 5%.