A system for testing a relay is provided. In one embodiment, the apparatus comprises a separable needle assembly and a device body. The above-described structure reduces parasitic inductance, and the voltage waveform to be applied on the plasma display device’s panel will have reduced ringing phenomenon. Then while holding the film, the stretchrelaxation device moves between the first-third drying chambers in which drying conditions are previously controlled. A plurality of adjacent particles contact each other, but the dielectric shells provide electrical isolation and prevent lateral conduction between the particles of the stratum. A set of posts are provided for holding the mirror plates on a substrate, but not all micromirrors of the micromirror array have posts.