Delta Electronics, Inc.

Nan Ya Printed Circuit Board Corporation

Cheng-An Wu

Min-Fu Hsieh

Wei-Lun Kao

A circuit board structure is provided. The circuit board structure includes a first insulating layer, a second insulating layer, a vertical conductive feature, and an electronic element. The first insulating layer has multiple bumps thereon. The second insulating layer is disposed on the first insulating layer. The vertical conductive feature includes a first via hole and a second via hole extending vertically in the first insulating layer. The electronic element is disposed in the second insulating layer and surrounded by the bumps. The electronic element is electrically connected to the first via hole.

Circuit board structure and method for forming the same

The present disclosure provides a stator and winding assembly thereof. The stator includes a stator core including a tube wall and a hollow portion and a winding assembly. The winding assembly is disposed in the hollow portion and includes a first winding group and a second winding group. The first winding group includes plural winding units disposed on an inner side of the tube wall and defining an outer layer. The second winding group includes plural winding units disposed on an inner side of the outer layer and defining an inner layer. Any one of the projections of the winding units at the inner layer is partially overlapped with the projections of the two adjacent winding units at the outer layer. A number of turns of the winding units of the first winding group is equal to or greater than that of the winding units of the second winding group.

Growing community of inventors

Taoyuan, Taiwan

Cheng-An Wu