A membrane applied to the ostium of an atrial appendage for blocking blood from entering the atrial appendage which can form blood clots therein is disclosed. In an example, a method of dicing a semiconductor wafer having a plurality of integrated circuits involves forming a mask above the semiconductor wafer, the mask composed of a layer covering and protecting the integrated circuits. According to a first embodiment, if the requested resource on the network has predictive failure information that indicates the resource may soon fail, a message is returned to the requesting computer with information that includes possible alternative sites from which the information may be obtained. In other preferred embodiments, both the substrate and the flexible circuitry have openings into which a device of greater profile such as, for example, an AMB or a logic device with or without a resident heat sink are provided with a volume to occupy without adding the full profile of the taller device to the profile of the module itself.