According to certain embodiments, an electronic device comprises: a front case including a seating portion, and a display module disposed in the seating portion; wherein the front case includes a first fiducial mark, wherein the first fiducial mark includes: a first fiducial gap; a first area surrounding at least a portion of the first fiducial gap having a first surface roughness; and a second area exclusive with the first area, having a second surface roughness that is different from the first surface roughness.