A method of forming a low dielectric constant structure. The invention is characterized in that in an electrochemical cell, comprising a channel structure for feeding, circulating and discharging fluids necessary for the operation of said cell, at least one element modifying the flow cross-section is integrated into at least one channel of the channel structure for automatic control of at least one fluid flow. The body can provide structural support for the input device. When the status of a destination changes from congested to non-congested, the deferred queue is examined to see if any deferred frames can now be forwarded to their destination.