Adhesive material for touch screens

Abstract

A pressure sensitive spacer coating for a touch screen may include a silicone adhesive material dissolved in a solvent. A touch screen may also include a first layer including a first conductive coating, a second layer including a second conductive coating, and a silicone pressure sensitive adhesive disposed between the first layer and the second layer. A method of manufacturing a touch screen may include providing a first layer having a first translucent conductive surface. The method may also include providing a second layer having a second translucent conductive surface. The method may also include applying an adhesive solution including silicone on at least one of the first conductive surface and the second conductive surface. The touch screen can be an analog or a matrix resistive touch screen. The adhesive can be applied by screen printing. The adhesive can be mixed with a slow evaporating solvent before screen printing.

Description

technical field [0001] The present invention relates to touch sensors or touch screens. More specifically, the present invention relates to parting adhesive materials for touch sensors or touch screens. Background technique [0002] Typically, touch sensors or touch screens, such as capacitive or resistive touch screens, are used in front of computer-driven displays that can change images or in front of immutable displays that can enhance fixed images. A touch sensor or touch screen provides an interface so that a person can pass commands to a computer or other control device. Touch screens can be used with many devices such as computers, control panels, controllers, small organizers such as PALM TM Laptops, available from Palm, Inc. of Santa Clara, CA), arcade games, or other electronic devices that require human-computer interaction. Typically, a touch screen is placed on top of (in front of) the display and includes at least one conductive layer that can be used to sen...

AI Technical Summary

Problems solved by technology

However, polymers using solvent-based acrylic PSAs are difficult to screen print

For example, acrylic PSAs are prone to foaming and stringy rheology

Additionally, acrylic PSAs tend to have too low a solids content to adequately achieve the desired final dry thickness

Also, acrylic PSAs are generally only useful in faster evaporating solvents, which can "clog" the printing screen

Images