Patent ID: 8878641

Claim:
An electronic component comprising: a substrate; a thin-film element layer provided on the substrate; first and second bump electrodes provided on a surface of the thin-film element layer; and an insulator layer provided on the surface of the thin-film element layer and filling a first space between the first bump electrode and the second bump electrode, wherein the thin-film element layer contains a first spiral conductor, which is a plane coil pattern, the first bump electrode is connected to an internal peripheral end of the first spiral conductor, the second bump electrode is connected to an external peripheral end of the first spiral conductor, each of the first and second bump electrodes has a first exposure surface exposed to a principal surface of the insulator layer and a second exposure surface exposed to an end face of the insulator layer, the first exposure surface of the first bump electrode and the first exposure surface of the second bump electrode have different shapes and sizes, and each second exposure surface of the first and second bump electrodes is provided above the thin-film element layer, the electronic component further comprising third and fourth bump electrodes provided on the surface of the thin-film element layer, wherein the thin-film element layer further contains a second spiral conductor magnetically coupled to the first spiral conductor and composed of a plane coil pattern, the insulator layer fills a second space between the first to fourth bump electrodes, the third bump electrode is connected to an internal peripheral end of the second spiral conductor, the fourth bump electrode is connected to an external peripheral end of the second spiral conductor, each of the third and fourth bump electrodes has a first exposure surface exposed to the principal surface of the insulator layer and a second exposure surface exposed to the end face of the insulator layer, the first exposure surface of the third bump electrode and the first exposure surface of the fourth bump electrode have mutually different shapes and sizes, and each second exposure surface of the third and fourth bump electrodes is provided above the thin-film element layer.