PURPOSE: To secure a good continuity between an internal conductor pattern and an external electrode and to enhance reliability by a method wherein an extraction part of the internal conductor pattern is constituted of two layers by an extraction electrode and an auxiliary electrode which have been formed on two green sheets.
CONSTITUTION: An extraction part is constituted of the following two layers: an extraction electrode 19 of an internal conductor pattern 11 formed on a green sheet 12; an extraction auxiliary electrode 3 formed on a green sheet 4. The sheet 12 is sandwiched between sheets 4; in addition, they are sandwiched between dummy green sheets 13 and pressure-bonded. After that, this assembly is baked and united; a raw body 2 is formed; external electrodes 15 are applied; a chip coil 1 is obtained. Thereby, a thickness of the extraction part is doubled; a conductive component such as silver, palladium or the like is left in large quantities at the extraction part during a baking operation. consequently, a good continuity between the internal conductor pattern and the external electrodes is secured; reliability is enhanced.
ISODA HARUHISA
YAMANAKA YOSHIBUMI
TAKEUCHI HIROYUKI
| JP61188321B |