Place chocolate in a large, heat-proof bowl over a pan of barely simmering water. Stir until melted and smooth.
Remove bowl from heat and stir in half of the potato chips.
Spread onto a nonstick pan into a rectangle, about ¼ inch thick. Sprinkle salt over all chocolate, then lightly press the remaining potato chips into the chocolate.
Set in a cool place to set for 1-2 hours. Break into pieces and serve.