Embodiments described herein may be related to apparatuses, processes, systems, and/or techniques for fabricating semiconductor packages that use a SiC layer that is coupled with another layer that includes another material. The SiC layer may be an active layer that includes devices, such as transistors, that are coupled with devices that may be in the other layer. The SiC layer may be coupled with the other layer using fusion bonding, hybrid bonding, layer transfer, and/or bump and island formation techniques. Other embodiments may be described and/or claimed.