High dielectric constant embedded capacitors

An embedded capacitor having a dielectric constant of at least 2600 comprising

• a) a pluirality of glass-based green tapes, each glass-based green tape having printed circuitry thereon;
• b) a multilayer capacitor comprising a dielectric green tape made by depositing a layer made from a capacitor ink of a mixture of lead-magnesium-niobate powder, about 10% by weight of the ink of lead oxide powder, and about 1% by weight of the ink of barium titanate, and an organic vehicle, the dielectric green tape coated with a silver conductor layer;
• and
• c) one or two layers of glass-based green tape over the capacitor.

A method of making embedded high dielectric constant capacitors comprising

• a) stacking a plurality of glass-based green tapes having circuitry thereon;
• b) stacking a plurality of dielectric green tapes made from lead-magnesium-niobate, barium titanate and lead oxide powders, each coated with a conductive layer of silver;
• c) assembling a multilayer tape stack comprising the glass-based green tapes of step a), the dielectric green tapes of step b) and one or two overlying glass-based green tapes,
• d) laminating the stack, and
• e) firing the stack at a temperature below about 900° C.

An embedded capacitor having a dielectric constant of at least 2600 comprising

• a) a plurality of glass-based green tapes, each glass-based green tape having printed circuitry thereon,
• b) a multilayer capacitor comprising a dielectric green tape made from a mixture of lead-magnesium-niobate powder, lead oxide powder, barium titanate and an organic vehicle, the dielectric green tape coated with a silver conductor layer;
• and
• c) one or two layers of glass-based green tape over the capacitor layer, wherein the glass-based green tapes are TCE matched to gallium arsenide.