Abstract: A ceramic green sheet structure has a ceramic green sheet including at least a ceramic material and a resin and a conductive layer formed on the ceramic green sheet. An electrode non-formed area has a porosity equal to or greater than 17%, and preferably, equal to or less than 25%. Moreover, an electrode formed area where the conductive layer is formed may have a smaller porosity than the electrode non-formed area where no conductive layer is formed.

Abstract: A dielectric ceramic composition comprised of at least dielectric particles having barium titanate as its main ingredient, wherein the ratio of dielectric particles having a surface diffusion structure comprised of a main ingredient phase comprised of the main ingredient and a diffusion phase present around the main ingredient phase with respect to said dielectric particles is 60% or more and the ratio of dielectric particles having a domain in the main ingredient phase with respect to the dielectric particles having the surface diffusion structure is 20% or less. According to the present invention, a dielectric ceramic composition and electronic device realizing good high temperature accelerated life can be provided.

Abstract: A dielectric ceramic composition comprised of at least dielectric particles having barium titanate as its main ingredient, wherein the ratio of dielectric particles having a surface diffusion structure comprised of a main ingredient phase comprised of the main ingredient and a diffusion phase present around the main ingredient phase with respect to said dielectric particles is 60% or more and the ratio of dielectric particles having a domain in the main ingredient phase with respect to the dielectric particles having the surface diffusion structure is 20% or less. According to the present invention, a dielectric ceramic composition and electronic device realizing good high temperature accelerated life can be provided.

Abstract: A dielectric ceramic composition including dielectric particles comprising a main ingredient phase having barium titanate as its main ingredient and a diffusion phase present at the periphery of said main ingredient phase, wherein when an average value of the depth where sub ingredient elements present at said diffusion phase diffuses from a surface of said diffusion phase toward a center of said dielectric particle is designated as an average diffusion depth, a dispersion of the average diffusion depth among the dielectric particles is, in terms of CV value, 5 to 30%. According to the present invention, an electronic device excellent in all of the dielectric constant, high temperature accelerated life, TC bias, and IR temperature dependency can be provided.

Abstract: A ceramic green sheet structure has a ceramic green sheet including at least a ceramic material and a resin and a conductive layer formed on the ceramic green sheet. An electrode non-formed area has a porosity equal to or greater than 17%, and preferably, equal to or less than 25%. Moreover, an electrode formed area where the conductive layer is formed may have a smaller porosity than the electrode non-formed area where no conductive layer is formed.

Abstract: A dielectric ceramic composition comprised of at least dielectric particles having barium titanate as its main ingredient, wherein the ratio of dielectric particles having a surface diffusion structure comprised of a main ingredient phase comprised of the main ingredient and a diffusion phase present around the ingredient phase with respect to said dielectric particles is 60% or more the ratio of dielectric particles having a domain in the main ingredient phase with respect to the dielectric particles having the surface diffusion structure is 20% or less. According to the present invention, a dielectric ceramic composition and electric device realizing good high temperature accelerated life can be provided.

Abstract: A dielectric ceramic composition including dielectric particles comprising a main ingredient phase having barium titanate as its main ingredient and a diffusion phase present at the periphery of said main ingredient phase, wherein when an average value of the depth where sub ingredient elements present at said diffusion phase diffuses from a surface of said diffusion phase toward a center of said dielectric particle is designated as an average diffusion depth, a dispersion of the average diffusion depth among the dielectric particles is, in terms of CV value, 5 to 30%. According to the present invention, an electronic device excellent in all of the dielectric constant, high temperature accelerated life, TC bias, and IR temperature dependency can be provided.

Abstract: A dielectric ceramic composition including dielectric particles and grain boundary phases present among these dielectric particles, wherein when measuring a concentration of Si and/or element “A” contained in the grain boundary phases (where, “A” is at least one element selected from cationic elements with an effective ion radius in sixfold coordination of 0.065 nm to 0.085 nm), the concentration of the Si and/or element “A” disperses depending on the position in the grain boundary phases, and the dispersion of the concentration of Si and/or elmemt “A” in the grain boundary phases is, in terms of CV value, larger than 10% and less than 58%. According to the present invention, a dielectric ceramic composition and an electronic device excellent in capacity-temperature characteristic while realizing a good high temperature accelerated life can be realized.