Capacitive touch screen and preparation method

Abstract

The invention discloses a capacitive touch screen and a preparation method. The capacitive touch screen comprises a glass panel layer, a film layer and a flexible circuit board, wherein the glass panel layer and the film layer are sequentially laminated from top to bottom, the lower surface of the glass panel layer is provided with an induction electrode layer and an induction electrode outgoing line layer, and the induction electrode outgoing line layer is an ITO (Indium Tin Oxide) induction electrode layer; the upper surface of the film layer is provided with a drive electrode layer and a drive electrode outgoing line layer, the surface of glass panel layer provided with the induction electrode layer and the surface of the film layer provided with the drive electrode layer are mutually glued through a transparent insulating glue layer, and the induction electrode outgoing line layer and the drive electrode outgoing line layer are connected in such a way that the front sides and reverse sides are bonded through the flexible circuit board. According to the capacitive touch screen provided by the invention, the induction electrode layer and the drive electrode layer can be etched by a laser etching technology, and the relevant parameters can be regulated to etch a conducting film and relevant leads better, therefore the etching process can be simplified, the process yield can be greatly improved, and the production cost can be reduced.

Description

technical field [0001] The invention relates to the field of touch screens, in particular to a capacitive touch screen and a preparation method. Background technique [0002] The touch screen is an input device that can facilitate the interaction between people and computers and other portable mobile devices. In recent years, capacitive touch screens based on indium tin oxide (ITO) transparent conductive films, especially projected capacitive screens, which can perform multi-finger recognition and realize multi-touch, have been widely used in mobile Internet devices, such as smart phones and portable tablet computers. . [0003] At present, the mainstream projected capacitive screens on the market mainly include G+G / G+F and G+F+F structures according to their structure. The projected capacitive screens with G+G structure include cover glass, adhesive layer and conductive glass. The total thickness is about 1.4mm; the G+F structure includes cover glass, adhesive layer and c...

AI Technical Summary

Problems solved by technology

Moreover, the G+G / G+F structure has the following disadvantages: the former is relatively thick and heavy, and cannot achieve light and thin effects, and requires the use of bridging or jumper processes, which virtually increases the difficulty of the process and requires high precision; The latter structure is rarely used due to the increased risk of product reliability due to the use of the above process

Using yellow photolithography, acid etching, or etching paste etching is cumbersome, long-term, and pollutes the environment. Especially, the conductive pattern using ITO plus metal wiring needs to be etched multiple times due to different conductive substances. Or printing silver paste after etching, resulting in high production cost of touch screen, low production yield, many and complicated equipment, and high production environment requirements. With the increasingly fierce market competition, the cost pressure is becoming increasingly prominent. The requirement to simplify the process and reduce costs has become Urgent requirements in the field of touch screen

Images