SMT washers are SMDS (Surface mounted equipment) that use SMT (Surface mounted Technology) as ground terminals. SMT washers are designed for PCB grounding to effectively reduce faults and EMI noise in the electronic housing. SMT gaskets can be installed quickly, with proper electrical conductivity, superior durability, reliability, excellent heat resistance and electrical grounding characteristics. 

A ground gasket that can be SMT, the compressibility of silica gel, and the low resistance of the silver surface. Make the grounding more reliable, and can be SMT mount process to make the operation easier.

The minimum size of the optical module is 2 x 1 x 1mm