Touch pad with flexible substrate

A capacitive device comprising:

• a flexible circuit substrate that is dimensionally stable up to a first temperature,
• a first plurality of conductors disposed on the flexible circuit substrate;
• and
• a first plurality of conductive pads disposed on the flexible circuit substrate and coupled to the first plurality of conductors, wherein the first plurality of conductive pads is configured to couple to a second plurality of conductive pads disposed on a sensor substrate, wherein the sensor substrate is dimensionally stable up to a second temperature that is lower than the first temperature and wherein the capacitive sensor substrate is not dimensionally stable at the first temperature, wherein the capacitive device is configured to detect changes in capacitance.

A capacitive device comprising:

• a sensor substrate;
• a first plurality of conductor pads disposed on the sensor substrate, wherein the first plurality of conductor pads is configured to be coupled to a second plurality of conductor pads disposed on a flexible circuit substrate that is dimensionally stable up to a first temperature, wherein the sensor substrate is dimensionally stable up to a second temperature that is lower than the first temperature and wherein the sensor substrate is not dimensionally stable at the first temperature;
• a first plurality conductors disposed on the sensor substrate and coupled to the first plurality of conductor pads;
• and
• a first plurality of sensing elements disposed on the sensor substrate and coupled to the first plurality of conductors, wherein the sensing elements are configured detect changes in capacitance.