Modularized planar coil layer and planar transformer using the same

摘要

Disclosed is a modularized planar coil in the form of a planar coil layer and comprising a coil main body and two pads extended from both ends of the coil main body. The pads respectively locate at a first position at periphery of an imaginary geometric shape that encloses the coil main body and a second position apart from the first position at peripheral of the geometric shape. Winding assemblies of a plurality of the invented planar coil layers and transformers including the invented coil layers are also disclosed. The invention provides a planar transformer that is easy to prepare and useful in the SMT technology.