That means it has no gaps. You can use a switch in a circuit to create a gap in a circuit. This can be used to switch it on and off. When a switch is open (off), there is a gap in the circuit.

This paper presents a modelling technique for achieving accurate switching waveforms of typical power converter systems. The interconnection model of a power printed circuit board (PCB) is based on ...

A Design-for-test (DfT) technique is proposed in this paper for a test method, by which detecting open defects occurring interconnects between 3D stacked SRAM IC and a printed circuit board and among ...