Understanding Capacitive Touch Screens Since Apple launched the first generation iPhone on June 29, 2007(Honan, Mathew, "Apple unveils iPhone", 2007), the way of using the phone started to change. the biggest change is that a mobile phone can control a large touch screen without using a pen on it. Touch screen interfaces are also effective in many other devices, such as tablets, laptops and TVs, influencing technological research in the last 5-6 years. The goal of this essay is to briefly explain the principles involved in the operation of capacitive touch technology. The main focus will be on the basics of what is contained within a capacitive touch screen and what the features are and how capacitive touch screens work. Image from Sony MobileA capacitive touch screen consists of a first plurality of conductive traces formed on a first glass surface; a plurality of capacitive sensing lines between the first plurality of conductive traces; an optically coupled insulating layer of silicon dioxide formed over the first plurality of conductive traces with a plurality of openings exposing the ends of the plurality of capacitive sensing lines; and a conductive layer above the insulating layer that connects to the ends of the plurality of capacitive sensing lines across the plurality of apertures. (L Mozdzyn - US Patent Application 12/210,140, ​​2008) All the layers above are called Projected capacitive touch (PCT) technology, which is a capacitive touch sensing technology that enables more accurate and flexible operation, affecting the conductive layer. (Capacitive Touch (Touch Sensing Technologies — Part 2)". TouchAdvance.com) However, Projected Capacitive Touch (PCT) technology comes in two different types: self-capacitive and mut...... middle of paper... ... – Web.May 21, 2014.< http://www.google.com/patents/US20100066700 >"Floating touch." Developer World Floating touch Comments, nd Web retrieved May 21, 2014. "Capacitive Touch (Touch Sensing Technologies) - Part 2)". TouchAdvance.com. Retrieved May 21, 2014. LK Baxter, Capacitive Sensors : Design and Applications (Wiley-IEEE, 1996. Retrieved May 21, 2014. < http://books.google.co.uk/books?id=Tjd2laRnO4wC&pg=PA156&lpg=PA156&dq=L.+K.+Baxter ,+Capacitive). +Sensors:+Design+and+Applications&source=bl&ots=NwUVthxIZ_&sig=8w0pnPMoygYiw0HkLs0iSb4uFKk&hl=en&sa=X&ei=kUJ9U5mDOoPA7Aa1xoCgCw&ved=0CEEQ6AEwAQ#v=onepage&q=L.%20K.%20Baxter %2C%20Capacitive%20Sensors%3A%20Design%20e%20Applications&f= false>