Capacitor and manufacturing method thereof

The invention discloses a capacitor and a manufacturing method thereof. The capacitor comprises a first electrode, a dielectric substance and a second electrode. The first electrode is arranged on a dielectric layer. The dielectric substance covers sidewalls and the top surface of the first electrode. The second electrode covers the dielectric substance and the dielectric layer, wherein the orthographic projection area of the second electrode on the dielectric layer is greater than the orthographic projection area of the first electrode on the dielectric layer. The capacitor disclosed by the invention has good reliability. 本发明公开种电容器及其制造方法，该电容器包括第电极、介电质以及第二电极。第电极位于介电层上。介电质覆盖第电极的侧壁与顶面。第二电极覆盖介电质与介电层，其中第二电极于介电层上的正投影面积大于第电极于介电层上的正投影面积。本发明的电容器具有良好信赖度。