Abstract: Techniques and apparatuses directed to component shielding are described in this document. A first aspect relates to a system including a printed circuit board (PCB) oriented along a first plane, a device on the PCB, and a component shield having a wall structure oriented perpendicular to the first plane and a cover structure connected to the wall structure. The system includes a housing structure oriented along a second plane that is substantially parallel to the first plane. The first and second planes define a shielded space within which the component shield and the device reside. The system further includes a shielding layer residing at least partially between the cover and housing structures. The shielding layer has an irregular cross-section along a fourth plane perpendicular to at least one of the first or second planes and a third plane. The irregular cross-section includes a protrusion that extends from the third plane.

Abstract: A fan includes a motor base, a bearing, an impeller, a stator and a magnetic element. The motor base has a bearing stand in a center portion thereof. The bearing is accommodated within the bearing stand. The impeller includes a metallic case, a hub, plural blades and a rotating shaft. The metallic case has a top surface and a sidewall. The hub is sheathed around the metallic case. The blades are disposed around an outer periphery of the hub. The rotating shaft is protruded from a center portion of the top surface and penetrated through the bearing stand, wherein no raised ring structure is formed in the top surface of the metallic case, and the rotating shaft and the metallic case are jointed together by a laser welding process. The magnetic element is disposed on an inner wall of the metallic case and aligned with the stator.