Packaging device and laminated coil thereof

The utility model discloses a packaging device and a laminated coil thereof. The laminated coil comprises a first insulating dielectric layer, a laminated circulating body and a second insulating dielectric layer, the first insulating medium layer is provided with a lead-out layer, and the lead-out layer is formed by opening holes in the first insulating medium layer and filling conductive paste; the second insulating dielectric layer is provided with a through hole layer, and the through hole layer is formed by opening a hole in the second insulating dielectric layer and filling conductive slurry; the laminated circulating body comprises more than two insulating medium layers which respectively comprise printed electrode patterns; the printed electrode pattern on each insulating dielectric layer is in an open ring shape, and the inner ring area of at least one open ring shape is smaller than the inner ring areas of other open ring shapes. By reducing the area of a part of the inner electrode coil, the stray