Patent ID: 8087136

Claim:
A production method of an electronic device having an element body, wherein dielectric layers and internal electrode layers are alternately stacked, including the steps of: forming pre-fired internal electrode layers for composing said internal electrode layers after firing by using an internal electrode paste; forming green sheets for composing said dielectric layers after firing by using a green sheet paste; forming a green chip by alternately stacking said green sheets and said pre-fired internal electrode layers; firing said green chip to obtain a sintered body; and annealing said sintered body; wherein said green sheet paste includes a Mg element and a Mn element, said internal electrode paste includes a Ni element and Al 2 O 3 as a co-material, wherein the amount of Al 2 O 3 is 5-20% by weight per 100% by weight of the Ni element, an annealing temperature in said annealing step is higher than 800° C. but not higher than 1300° C., each internal electrode layer includes the Ni element as a major ingredient and an Al element of not less than 0.4% by weight but not higher than 2.4% by weight with respect to the entire internal electrode layer, and a hetero phase including a Mg element and a Mn element is formed in said dielectric layers and/or said internal electrode layers.