Patent ID: 7852187

Claim:
A multilayer winding comprising a stack body and multiple external pins connected to the stack body, wherein the stack body comprises: multiple sub-stacks stacked to each other, wherein each sub-stack has two first metal rings and a first insulation layer interposed between the two first metal rings, wherein each first metal ring has: a first center line; a center-shift opening formed on one position of the first metal ring to be distant from the first center line; to first and central mounts outwardly extended from the center-shift opening, wherein the central mount is located on the center line; and top and bottom faces, wherein one of the two first metal rings is stacked upon the other first metal ring, so the sub-stack has an upper first metal ring and a lower first metal ring, wherein the top face of the upper first metal ring faces to the top of the lower first metal ring; at least one second metal rings, each of which is interposed between two corresponding adjacent sub-stacks, wherein each second metal ring has: a second center line aligned to the first center line; two half rings each of which has a top surface, a bottom surface, two ends, an interconnecting mount and an askew mount, wherein one of the two ends is integrated with the interconnecting mount, and the askew mount is extended outwardly from the other end, wherein the interconnecting side is located on the center line, and the askew mount crosses the second center line; and a second insulation layer interposed between the two half rings; wherein one of the two half rings intersect, so the sub-stack has an upper half ring and a lower half ring, wherein the top surface of the upper half ring faces to the top of the lower half ring; and multiple third insulation layers, each of which is interposed between the sub-stack and the second metal ring.