A capacitor includes at least two electrode layers opposite to each other and a dielectric layer positioned between the at least two electrode layers. The at least two electrode layers have opposite polarities. Each electrode layer includes a positive electrode and a negative electrode. The positive electrode includes a plurality of first coupling portions spaced substantially evenly and arranged in parallel. The negative electrode includes a plurality of second coupling portions spaced substantially evenly and arranged in parallel. The positive electrode and the negative electrode of each electrode layer are coplanar, and the plurality of first coupling portions interlace with the plurality of second coupling portions.