US 5,144,527 A · Multilayer capacitor and method of fabricating the same

Abstract

A multilayer capacitor constructed using a monolithic type dielectric body in which a plurality of dielectric layers are laminated with inner electrodes being interposed therebetween and having a structure in which the width of the inner electrodes is made smaller than that of the dielectric layers so that side margin regions are provided in side parts of the inner electrodes. In this multilayer capacitor, the inner electrodes originally have the same width as the dielectric layers and have side edges which are exposed at side surfaces of the above described monolithic type dielectric body. The exposed side edges of the inner electrodes are etched or physically removed to form the above described side margin regions. The side margin regions are formed by removing parts of the inner electrodes by etching or physical removal, so that the width of the side margin regions is accurately achieved. In addition, the multilayer capacitor is constructed by forming the above side margin regions after overlapping the inner electrodes while they still have the same width as the dielectric layers, so that the overlapping area of the inner electrodes is accurately controlled.

Claims19

Dependent claims

A multilayer capacitor which has a monolithic type dielectric body having respective opposed pairs of end surfaces, side surfaces, and top and bottom surfaces, in which a plurality of dielectric layers are laminated with inner electrodes being interposed therebetween and in which the width of said inner electrodes between said side surfaces is made smaller than that of said dielectric layers so that side margin regions are provided at side parts of the inner electrodes, and having a pair of outer electrodes formed on respective end surfaces of said monolithic type dielectric body which are conductively connected to predetermined ones of said inner electrodes;

the multilayer capacitor being characterized in that said side margin regions are formed by etching side edges of said inner electrodes, at said side surfaces of the monolithic type dielectric body;
wherein the inner electrodes initially have the same width as said dielectric layers, and the side edges of the inner electrodes are exposed at said side surfaces, before said etching;
each of said outer electrodes extending onto said side, top and bottom surfaces from the respective end surface so as to form a five-sided cap on said monolithic type dielectric body.

A method of fabricating a multilayer capacitor which includes a monolithic type dielectric body having respective opposed pairs of end surfaces, side surfaces, and top and bottom surfaces, in which a plurality of dielectric layers are laminated with inner electrodes being interposed therebetween and in which the width of the inner electrodes between said side surfaces is made smaller than that of said dielectric layers so that side margin regions are provided at side parts of the inner electrodes, and having a pair of outer electrodes formed on said end surfaces of said monolithic type dielectric body which are conductively connected to predetermined ones of said inner electrodes, comprising the steps of:

obtaining a monolithic type dielectric body in which a plurality of dielectric layers are laminated with inner electrodes being interposed therebetween and the width of the inner electrodes being made equal to that of the dielectric layers;
forming a pair of outer electrodes said end surfaces of said monolithic type dielectric body which are conductively connected to predetermined ones of said inner electrodes, said outer electrodes extending onto said side, top and bottom surfaces from said end surfaces so as to form a 5-sided cap on said multilayer capacitor;
forming side margin regions at side parts of the inner electrodes by etching side edges of said inner electrodes at said side surfaces of the monolithic type dielectric body at which said side edges of said inner electrodes are exposed.

Dependencies are inferred from the claim text.

Multilayer capacitor and method of fabricating the same

Life of this patent

Multilayer capacitor and method of fabricating the same

Life of this patent

Abstract

Claims19