Patent ID: 8014121

Claim:
An electrical discharge countermeasure device for preventing occurrence of electrical discharge on an electrically conductive structure in an environment in which high-energy electrons impinge onto the structure or on an electronic element mounted to a surface of the structure, which electrical discharge would otherwise occur when the potential of the structure or the electronic element increases in the negative direction due to a negative charge flowing thereinto, the electrical discharge countermeasure device comprising: an insulating tape bonded to the surface of the electrically conductive structure, the insulating tape being partially cut-removed so as to expose a portion of the surface of the electrically conductive structure; an electrically conductive adhesive applied to the exposed portion of the surface of the electrically conductive structure; and an insulating film or a plastic film reinforced by electrically conductive fibers, which is bonded to the electrically conductive adhesive, such that a portion of the electrically conductive adhesive is exposed to the outside, wherein when the electrically conductive structure encounters higher-energy electrons, the insulating film or the plastic film reinforced by electrically conductive fibers is charged, so that a strong electric field is applied to the electrically conductive adhesive, and electrons are emitted from the electrically conductive adhesive through field electron emission, to thereby prevent the potential of the electrically conductive structure from increasing in the negative direction.