Concurrent, incremental, and lock-free stack scanning for garbage collectors is disclosed. The fuse comprises forming a first contact member and a second contact member over a respective first region and a second region of a patterned, electrically-conductive silicide layer, wherein the first contact member and the second contact member electrically contact the silicide layer, thereby defining a first interface and a second interface, respectively. When a pair of occluders are used in sequence, an in-line pump may be formed. The array of prisms extends from an edge of the curved perimeter portion to a distance L.