Yonsei University

Gachon University of Industry-Academic Cooperation Foundation

Kyoung Su Park

No Cheol Park

Byung Han Ko

Dong Su Park

Sang Geuk Jeong

A method of modifying the surface of a coating layer applied to a substrate includes a step (s) of preparing a substrate by performing pretreatment, a step (s) of coating the substrate with a coating layer, and a step (s) of modifying the surface of the coating layer by vibrating the substrate in the vertical direction. The surface modification method does not include a separate chemical process.

Vibration-based coating layer surface modification method considering boundary layer thickness

The present invention relates to a multi-layer capacitor. The multi-layer capacitor of the present invention includes a main body formed by alternately stacking a plurality of dielectric layers and a plurality of inner electrode layers, in which all the plurality of dielectric layers are poled in a same direction; a cover layer for covering and protecting the main body from outside; and outer electrodes electrically connected to the inner electrode layers to apply voltage to the inner electrode layers. Since deformation is offset overall in the multi-layer capacitor of the present invention, the piezoelectric effect occurs in an opposite direction in each of adjacent dielectric layers due to the poling process, and thus the present invention has an effect of reducing vibration and noise.

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Seoul, South Korea

Kyoung Su Park