Substrate circuit for keyboard

An information handling system comprising:

• a processor;
• and
• a keyboard communicatively coupled to the processor, the keyboard comprising a plurality of keys, each key of the plurality of keys comprising:
• a circuit assembly comprising:
• a substrate;
• a first metal layer patterned into a circuit and formed on the substrate;
• and
• a membrane comprising a second metal layer interfaced between a first electrically-insulative layer and a second electrically-insulative layer, and assembled to the first metal layer such that the first electrically-insulative layer is interfaced between the first metal layer and the second metal layer;
• and
• a keycap mechanically coupled to the circuit assembly via a mechanical member having a spring force biased to separate the keycap from the circuit assembly by a predetermined distance, such that when a force is applied to the keycap to overcome the spring force, the first metal layer comes in physical contact with the second metal layer.

A method for making a keyboard, comprising assembling a circuit assembly by:

• patterning a first metal layer into a circuit on a substrate;
• interfacing a membrane comprising a second metal layer between a first electrically-insulative layer and a second electrically-insulative layer;
• and
• assembling the membrane to the first metal layer such that the first electrically-insulative layer is interfaced between the first metal layer and the second metal layer.