Electronic module including a low temperature co-fired ceramic (LTCC) substrate with a capacitive structure embedded therein and related methods

A method for making an electronic module comprising:

• forming a low temperature co-fired ceramic (LTCC) substrate with at least one capacitive structure embedded therein by
• arranging first and second unsintered ceramic layers and the at least one capacitive structure therebetween, the at least one capacitive structure comprising a pair of electrode layers, an inner dielectric layer between the pair of electrode layers, a first outer dielectric layer adjacent at least one of the electrode layers and opposite the inner dielectric layer, and a second outer dielectric layer between the first outer dielectric layer and the at least one electrode layer, the inner dielectric layer having a greater dielectric constant than a dielectric constant of the second dielectric layer, and the dielectric constant of the second dielectric layer being greater than a dielectric constant of the first dielectric layer, and
• heating the unsintered ceramic layers and the at least one capacitive structure;
• and
• mounting at least one electronic device on the LTCC substrate and electrically connected to the at least one embedded capacitive structure to form the electronic module.

An electronic module comprising:

• a low temperature co-fired ceramic (LTCC) substrate;
• at least one capacitive structure embedded in said LTCC substrate comprising a pair of electrode layers, an inner dielectric layer between said pair of electrode layers, and at least one outer dielectric layer adjacent at least one of said electrode layers and opposite said inner dielectric layer, said at least one outer dielectric layer having a dielectric constant less than a dielectric constant of said inner dielectric layer;
• and
• at least one electronic device mounted on said LTCC substrate and electrically connected to said at least one embedded capacitive structure.