Patent ID: 8902168

Claim:
A keyboard for an electronic device, having a board, which board has a working surface, a number of keys on said working surface, each with a top, each key is activated by placing a finger on it's top, where said keyboard is below 3 mm thick, across its working surface, excluding the thickness attributed to any component of said device that would exist even in the absence of the keyboard, and where for each of most keys: actuation force is below 100 grams, at least one wall based on said board, separates the top from a number of adjacent tops, each wall has enough height to limit a finger from concurrently activating two keys separated by it, each wall is rigid enough to maintain said necessary height under typical typing pressure, each wall's base covers at least part of a hypothetical line surrounding at least one of said keys, and perimeter of said top is substantially static and has no or negligible movement against the wall.