Sealing and welding electrode of microminiature relay

A sealing and welding electrode of a microminiature relay is composed of an upper electrode, a lower electrode and insulating material, wherein a layer of the insulating materials (2) is added between a forming cavity, used for locating the outline of a housing, of the sealing and welding electrode and the outline of the housing (3), the thickness of the insulating materials (2) which is added between a forming cavity of the upper electrode (1) and the housing (3) is 0.05mm-0.3 mm. The dimension of an inner cavity of the insulating materials (2) is 0.01 mm-0.05 mm bigger than the boundary dimension of the housing, the boundary dimension of the insulating materials (2) and the dimension of an inner cavity of the upper electrode (1) are the same or in an interference fit which is equal to or less than 0.05 mm, and therefore, the upper electrode (1) and the insulating materials (2) are connected into a whole. In the sealing and welding electrode of the microminiature relay, the layer of the insulating materials