Abstract: A contact structure and manufacturing method thereof is provided. A substrate having a first conductive layer and a dielectric layer thereon is provided. The dielectric layer has a contact opening that exposes a portion of the first conductive layer. A conductive nano-particle layer is formed on the exposed surface of the first conductive layer. Thereafter, a second conductive layer is formed inside the contact opening to cover the conductive nanoparticle layer and form a contact structure. The conductive nanoparticle layer at the bottom of the contact prevents the second conductive layer from peeling off and costs much less to produce.

Abstract: A safety control switch including a push button ignition switch, which consists of a slide, a push button, a compression spring, a brake block, and a contact metal spring plate, for controlling gas flow and igniter in a gas-fired ignition gun, and a locking device mounted on the housing of the gas-fired ignition gun and moved relative to the brake block of the push button ignition switch between a first position to stop the push button and the slide from operation and a second position to let the push button and the slide be operated.