A fast, flexible carry scheme for use in clustered field programmable gate array architectures is described. In a separate operation an interconnection substrate structure is produced in a continuous roll-to-roll fashion. The connecting member can flex in response to spinal loading to provide dynamic stabilization, although rigid engagement relationships are also contemplated. A detected mismatch in current levels between the positive and negative rails of the port indicates a ground fault in the port. Flow control in case of a service level agreement violation is implemented either by reducing the server side window size or by delaying acknowledgement packets sent by the client. The insulating film includes a projection extending in the cavity, and a portion of the cavity is disposed between the projection and the first electrode.