Multi-part electronic device housing having contiguous filled surface

A housing for an electronic device comprising:

• a body formed from a first metal material and defining a first side and a first portion of a rear surface of the housing;
• an antenna window formed from a second metal material and defining at least a portion of a second side opposite to the first side and a second portion of the rear surface of the housing;
• and
• an insert formed from a non-metal material and positioned at least partially within a gap defined between the body and the antenna window, wherein:
• the housing is configured to pass electromagnetic signals through at least one of the insert or the antenna window.

A tablet computing device comprising:

• a cover defining a front external surface of the tablet computing device;
• a display module positioned below the cover;
• a first housing portion formed from a first conductive material and defining a first portion of a rear external surface opposite to the front external surface;
• a second housing portion formed from a second conductive material and defining a second portion of the rear external surface;
• and
• a non-conductive component positioned at least partially within a gap between the first housing portion and the second housing portion and defining a third portion of the rear external surface, the tablet computing device configured to transmit and receive electromagnetic signals through the gap.