Touch screen overlay with improved conductor durability

Details Touch screen overlay with improved conductor durability Touch screen overlay with improved conductor durability

G - Physics

06

K

340/135.1

G06K 11/06 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1298631

- 21 - TITLE TOUCH SCREEN OVERLAY WITH IMPROVED CONDUCTOR DURABILITY ABSTRACT OF THE DISCLOSURE A touch screen overlay for use on the viewing surface of a visual display device formed from a flexible membrane laminate having improved conductor durability. The flexible laminate comprises first and second flexible substrates formed of transparent polyester material. An array of parallel transparent conductors is deposited on a surface of each flexible substrate. The two flexible substrates are joined together by an adhesive sheet of polyester material. The substrates are joined so that transparent conductors are deposited on the surface of each flexible substrate which faces away from the viewing surface when the overlay is attached to the visual display device. The two arrays, when so superimposed, form a grid-like pattern, separated by the thickness of the upper one of the flexible substrates and the adhesive sheet. A third flexible substrate also formed of polyester material covers the surface of the upper one of the other flexible substrates carrying the upper array of parallel conductors. The second and third flexible substrates are also joined by an adhesive sheet of polyester material. When the overlay is contacted either by finer touch or by a stylus, the transparent conductors located in tile laminated below the contact area will subjected substantially only to compression forces. EL-4301

603520

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