Shoreline (beachfront)
Beginner
The edge of a chip that faces its neighbor and holds the connections between them. Like a coast, there’s only so much of it.
Novice
The length of die edge devoted to an interface. Side-by-side links can only use bumps in a strip behind the facing edges, so bandwidth is quoted per millimeter of shoreline.
Expert
Grows only with the perimeter while logic grows with area, which is why edge-limited I/O tightens as dies grow. UCIe specifies bump maps with a fixed shoreline per module, so finer pitch buys a shallower PHY, not a wider one.