Patent ID: 8186027

Claim:
A method for fabricating a vibrator comprising steps of: fabricating plural piezoelectric green sheets of slurry having desired composition; forming first upper and lower cover layers by forming through-holes in predetermined sheets of the green sheets; filling at least one through-hole of the first upper and lower cover layers with organic paste; providing predetermined sheets of the green sheets as a vibration active sheet and second upper and lower cover layers, wherein said second upper and lower cover layers comprise burning passages through which an organic matter is capable of being communicated with an environment; forming an upper internal electrode between the vibration active sheet and the first upper cover layer and a lower internal electrode between the vibration active sheet and the first lower cover layer; laminating said first upper and lower cover layers on the upper and lower portions of the vibration active sheet, respectively, and laminating said second upper and lower cover layers on the upper and lower portions of the first upper and lower cover layers, respectively, to form a laminate; simultaneously sintering the laminate; removing the organic matter by heat treatment; sealing the burning passages with epoxy; and forming external electrodes, each of which is connected to each of the upper and lower internal electrodes, on said laminate.