Sensor device including elastic cover including portions with varying heights and a gap between portions

A sensor device, comprising:

• a substrate;
• a force sensor on the substrate;
• a light emitter to emit light from over the substrate;
• a light receiver to receive light on the substrate, and detect proximity of an object;
• and
• an elastic cover made of an elastic material;
• wherein
• the elastic cover includes:
• a first portion covering the force sensor;
• a second portion extending around the light emitter and the light receiver, through at least spaces between the light emitter, the light receiver, and the force sensor;
• and
• a third portion coupling the first portion and the second portion to each other;
• the third portion in the elastic cover has a lower height from the substrate than the first and second portions;
• and
• the elastic cover includes a gap between the first portion and the second portion.