To get more information about mTouch sensing solutions visit 
http://www.mirochip.com/mtouch and read the following articles:
- Capacitive Sensors by Larry K. Baxter ISBN 0-7803-5351-X
- AN1101, AN1102, AN1103, AN1104 – Covers Basic Cap Touch
- AN1250 – Cap Touch with CTMU
- AN1254 – Capacitive Touch Algorithm Simulation
- AN1298 – Capacitive Touch Using Only an ADC (CVD)
- AN1325 – mTouch™ Metal Over Cap Technology
- AN 1334 –Techniques for Robust Touch Sensing Design