this bond is also sometimes referred to as a micromechanical velcro bond as known in the art a micro velcro bond is made by forming inter locking connectors on both surfaces of the wafers to be bonded and forcing the connectors to inter lock using force the term is not used in the sense of the trademark velcro which is used to identify the source of a wide variety of goods and materials that use velvet crochet bonds made sold or licensed by velcro industry bv located in the netherlands electrical leads 30 may be passed out of the cavity through the seal metal 28 as shown in fig1 a without adversely affecting the predetermined pressure within the cavity in this regard the pressure seal of the present invention is provided by the deformable metal that fills around discontinuities in the seal such as the discontinuity created by the passage of an electrical lead 30 through the seal in addition the electrical leads can pass between those portions of the substrate and the cap that are structurally bonded since the structural bond generally does not extend continuously about the cavity so that the atmosphere within the cavity surrounding device 24 may be maintained at a predetermined pressure it is preferable that the structural bond between substrate 22 and cap 36 be formed outside of the periphery of seal ring 26 it is also preferable that the structural bond be made simultaneously with the pressure seal or made after the pressure seal has been formed otherwise an imperfect seal created by the structural bond may make it.