Abstract: In one example, an electronic device includes a substrate and a cover structure. The cover structure includes an upper cover wall comprising an upper wall outer surface and an upper wall inner surface opposite to the upper wall outer surface, cover sidewalls extending from the upper wall inner surface and coupled to the substrate. The upper cover wall and the cover sidewalls define a cavity. A channel structure is in the upper cover wall extending inward from the upper wall inner surface. A first electronic component is coupled to the substrate within the cavity and a thermal interface material (TIM) is coupled to the upper wall inner surface and the first electronic component. A portion of the TIM is within the channel structure. Other examples and related methods are also disclosed herein.