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Mutual capacitive touch screen sensor and preparation method thereof

A technology of touch screen and functional sheet, which is applied in the field of touch screen research, can solve the problems of poor metal bridging structure scribing effect, high precision requirements of metal bridging process, and difficult production, etc., to achieve high production yield, reduced thickness, and long service life Effect

Pending Publication Date: 2017-03-08
常州第六元素半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Due to the high precision requirements of the metal bridging process, it is difficult to make on PET and it is not resistant to bending. At the same time, the marking experience of the metal bridging structure is poor, and the metal highlights inside can be seen when it is finished.

Method used

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  • Mutual capacitive touch screen sensor and preparation method thereof
  • Mutual capacitive touch screen sensor and preparation method thereof
  • Mutual capacitive touch screen sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A mutual capacitive touch screen functional sheet, see figure 1 , 2 As shown, the entire mutual capacitive touch screen functional sheet is transparent, and each layer is made of transparent materials. The black and white in the figure are only used to clearly distinguish and display the structural features of the product. The mutual capacitance touch screen functional sheet includes a base film 1, an ITO driving layer 2, an isolation layer 3, a graphene sensing layer 4 and a protective adhesive layer 5, the base film 1, an ITO driving layer 2, an isolation layer 3, and a graphene sensing layer 4 and the protective adhesive layer 5 are closely attached in turn. The ITO driving layer 2 is a patterned ITO film. see image 3 As shown, the patterned ITO film forms the vertical electrode 21, also known as the Y electrode, which is indicated by the black part in the figure. The graphene sensing layer 4 is a patterned graphene film, see Figure 6 As shown, the patterned g...

Embodiment 2

[0056] A method for preparing a mutual capacitive touch screen functional sheet, comprising the steps of:

[0057] 1. A layer of Cu is sputtered on a single-layer ITO (thickness is 250 μm) structure PET, and the thickness of Cu is controlled within 300-400nm; image 3 As shown, the Y electrode 21 of the mutual capacitive touch screen is formed after ITO patterning;

[0058] 2. see Figure 4 As shown, the entire surface of the ITO driving layer 2 is coated with SiO 2 , SiO 2 The thickness is 50±10nm, which constitutes the isolation layer 3. When coating, the overlapping position of the graphene sensing layer and the metal wire 6 and the gold finger tip 7 need to be kept out of the air;

[0059] 3. On the isolation layer, make the photoresist pattern 42 of photoresist by exposure process, as Figure 5 As shown, the blank space indicates that there is photoresist, the black bar indicates that there is no photoresist, and the thickness of the photoresist pattern is about 1000n...

Embodiment 3

[0064] The preparation method of the mutual capacitive touch screen functional sheet, the process steps are the same as in Example 1, the difference is:

[0065] 1. In step 1, a layer of AIMoAI is sputtered to make the induction line;

[0066] 2. The isolation layer adopts OC.

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Abstract

The invention discloses a mutual capacitive touch screen sensor and a preparation method thereof. The structure of the mutual capacitive touch screen sensor comprises a substrate film, an ITO (Indium Tin Oxide) driving layer arranged on the substrate film, a separating layer arranged on the ITO driving layer, a graphene sensing layer arranged on the TIO driving layer, and a protective adhesive layer arranged on the graphene sensing layer, wherein the graphene sensing layer is a patterned graphene film; the ITO driving layer and the graphene sensing layer are correspondingly connected with a capacitive sensing chip through conductors. With the adoption of the method, the thickness of the whole mutual capacitive touch screen sensor can be greatly reduced on the premise that the marking effect is ensured; the thickness of the mutual capacitive touch screen is 1 / 3 that of a double-layer singe-surface ITO structure under the same marking effect.

Description

technical field [0001] The invention relates to a mutual capacitance touch screen functional sheet and a preparation method thereof, which are used for mobile phone touch screens and the like, and belong to the field of touch screen research. Background technique [0002] The capacitive touch screen uses the current induction of the human body to work. When the finger touches the metal layer, due to the electric field of the human body, a coupling capacitance is formed between the user and the surface of the touch screen. For high-frequency current, the capacitance is a direct conductor, which will affect the overall capacitance of the circuit. characteristic. The types of capacitive touch screens are classified according to the way of inductive capacitance, which can be divided into surface capacitive and projected capacitive. Projected capacitive touch screens can be divided into self-capacitance and mutual capacitance according to the scanning method. The self-capacitanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/044
Inventor 袁凯王炜谭化兵
Owner 常州第六元素半导体有限公司