Electronic devices having scratch-resistant antireflection coatings

An electronic device, comprising:

• a camera;
• a transparent sapphire member that overlaps the camera;
• and
• a visible light antireflection coating on the sapphire member that includes a stack of thin-film interference filter layers including an uppermost thin-film interference filter layer having a first index of refraction, wherein the uppermost thin-film interference filter layer has an index of refraction of greater than 2.0, a lowermost thin-film interference filter layer between the uppermost thin-film interference filter layer and the transparent sapphire member, a second-to-top thin-film interference filter layer that is adjacent to the uppermost thin-film interference filter layer and that has a second refractive index that is lower than the first index of refraction, wherein the uppermost thin-film interference filter layer comprises the same material as at least one of the other thin-film interference filter layers, wherein each filter layer of the stack of thin-film interference filter layers has an individual thickness, and wherein the individual thickness of the uppermost thin-film interference filter layer is less than all of the other individual thicknesses of the thin-film interference filter layers.

An electronic device, comprising:

• a light-based component;
• a transparent member that overlaps the light-based component;
• a visible light antireflection coating on the transparent member that includes a stack of thin-film interference filter layers including an uppermost thin-film interference filter layer and a lowermost thin-film interference filter layer between the uppermost thin-film interference filter layer and the transparent member, wherein the uppermost thin-film interference filter layer has first and second opposing surfaces, wherein the first surface of the uppermost thin-film interference filter layer is coupled to an underlying thin-film interference filter layer, and wherein the uppermost thin-film interference filter layer is a graded index layer having a first refractive index at the first surface;
• and
• a fluoropolymer antismudge layer on the second surface of the uppermost thin-film interference filter layer, wherein the uppermost thin-film interference filter layer has a second refractive index at the second surface that is higher than the first refractive index.