CN103085440A - Optical adhesive fast drying method during capacitive touch screen laminating process - Google Patents
Optical adhesive fast drying method during capacitive touch screen laminating process Download PDFInfo
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- CN103085440A CN103085440A CN2013100425789A CN201310042578A CN103085440A CN 103085440 A CN103085440 A CN 103085440A CN 2013100425789 A CN2013100425789 A CN 2013100425789A CN 201310042578 A CN201310042578 A CN 201310042578A CN 103085440 A CN103085440 A CN 103085440A
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- optical cement
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Abstract
The invention belongs to the field of electronic and information technology, and provides an optical adhesive fast drying method during a capacitive touch screen laminating process. First, optical adhesive is coated on a substrate glass plated with a transparent conductive film; vacuum heating drying is directly carried out upon the substrate glass coated with the optical adhesive; a glass protection cover plate is covered on the substrate glass, and the substrate glass and the glass protection cover plate are subjected to pneumatic thermo-compression bonding. According to the method, a vacuum drying technology is adopted, such that an ideal optical adhesive humidity can be rapidly artificially obtained. The adhesive strength of the optical adhesive is greatly improved, such that rebounding of the capacitive screen module after lamination and hot-press can be effectively inhibited, and lamination yield is greatly improved. Compared with an optical adhesive natural drying process, with the vacuum drying process, optical adhesive humidity can be more easily controlled, production period is shortened, and comprehensive economic benefit is improved. The method has high practicality, and good popularization and application values.
Description
Technical field
The invention belongs to electronic information technical field, relate in particular to a kind of quick-drying method of optical cement in attaching capacitive touch screens process.
Background technology
The key link of capacitive touch screen manufacturing process is the applying of TP module, namely use solid state optics glue (hereinafter to be referred as OCA) that ito glass (TP) and safety glass cover plate are bonded together, and then insert froth breaking in the high pressure defoamer, namely get the capacitance plate module after taking out from the high pressure defoamer.After yet the capacitance plate module that takes out from the high pressure defoamer was placed a period of time, the part module bubble can occur again, and we are referred to as " the first pressure rebounded ".Find through comparative analysis, " first press bounce-back " mainly results from the OCA underdry.Be directly used in applying if will newly grind the OCA that cuts, the first bounce-back rate of pressing up to more than 40%, is fitted after natural drying a period of time and the OCA that mill cuts is placed in proof cabinet again, and the first bounce-back rate of pressing can obviously reduce, drying time is longer, and the first bounce-back rate of pressing is lower.Although the head that natural drying OCA can suppress in capacitance plate applying process preferably presses bounce-back, produce that turnover period is long, efficient is low, storage pressure is large, is difficult to large quantities of volume productions.At present, the capacitance plate of the domestic same industry is fitted the first bounce-back rate of pressing mostly more than 20%.Therefore, adopting new method to carry out rapid draing to improve its bonding force to OCA, is the effective way that improves the attaching capacitive touch screens yield.
Summary of the invention
The invention provides a kind of quick-drying method of optical cement in attaching capacitive touch screens process, be intended to solve that prior art provides that solid state optics glue is carried out quick-drying method, drying effect is undesirable, and the bonding force of dry rear solid state optics glue is not strong, the first higher problem of bounce-back rate of pressing.
The object of the present invention is to provide a kind of quick-drying method of optical cement in attaching capacitive touch screens process, the method comprises the following steps:
Step 1 applies optical cement being coated with on the substrate glass of nesa coating;
Step 2 is carried out vacuum and heating drying to the substrate glass that is coated with optical cement;
Step 3, cover glass cover sheet on substrate glass carries out pneumatic heat pressure adhesive with substrate glass and glass protection cover plate.
Further, in step 1, the thickness that applies optical cement on substrate glass is 200um.
Further, the substrate glass that is coated with optical cement is carried out vacuum and heating drying in vacuum drying chamber.
Further, when the substrate glass that is coated with optical cement is carried out vacuum and heating drying, the temperature 50 C left and right, below air pressure 0.3pa, be 15min drying time.
Further, in step 3, after substrate glass and glass protection cover plate carry out pneumatic heat pressure adhesive, need hot pressing deaeration in the high pressure defoamer.
At first the quick-drying method of optical cement in attaching capacitive touch screens process provided by the invention applies optical cement being coated with on the substrate glass of nesa coating; Then the substrate glass that is coated with optical cement is carried out vacuum and heating drying; Cover glass cover sheet on substrate glass, carry out pneumatic heat pressure adhesive with substrate glass and glass protection cover plate at last; The method adopts vacuum drying technique, can artificially obtain rapidly desirable optical cement humidity, the bonding force of optical cement is significantly promoted, thereby effectively suppress the bounce-back after capacitance plate module applying hot pressing, binding yield is increased substantially, natural drying with respect to optical cement, the humidity of vacuum drying optical cement more easy to control has shortened the production cycle, has promoted overall economic efficiency, practical, have stronger propagation and employment and be worth.
Description of drawings
Fig. 1 is the realization flow figure of the quick-drying method of optical cement in the attaching capacitive touch screens process that provides of the embodiment of the present invention.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explaining the present invention, and be not used in and limit invention.
Fig. 1 shows the realization flow of the quick-drying method of optical cement in the attaching capacitive touch screens process that the embodiment of the present invention provides.
The method comprises the following steps:
Step S101 applies optical cement being coated with on the substrate glass of nesa coating;
Step S102 carries out vacuum and heating drying to the substrate glass that is coated with optical cement;
Step S103, cover glass cover sheet on substrate glass carries out pneumatic heat pressure adhesive with substrate glass and glass protection cover plate.
In embodiments of the present invention, in step S101, the thickness that applies optical cement on substrate glass is 200um.
In embodiments of the present invention, the substrate glass that is coated with optical cement is carried out vacuum and heating drying in vacuum drying chamber.
In embodiments of the present invention, when the substrate glass that is coated with optical cement is carried out vacuum and heating drying, the temperature 50 C left and right, below air pressure 0.3pa, be 15min drying time.
In embodiments of the present invention, in step S103, after substrate glass and glass protection cover plate carry out pneumatic heat pressure adhesive, need hot pressing deaeration in the high pressure defoamer.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
Purpose of the present invention: adopt a kind of method of the rapid draing optical cement for technology for attaching capacitive touch screens, overcome the deficiency of traditional coating technique, improve the bonding force of optical cement, the first bounce-back rate of pressing of decrease has improved production efficiency.
Basic principle of the present invention: the capacitance plate module occur bubble namely the reason of " first press bounce-back " be, it is smooth that glass surface is owed, when slightly External Force Acting being arranged after heat pressure adhesive, strain everywhere and stress distribution are just inhomogeneous, optical cement thickness is also inhomogeneous and even do wet degree varies everywhere, so that regional area bonding force not enough (less than bounce) and bubble appears in bounce-back.The bonding force of optical cement and its humidity are closely related, and suitable humidity has maximum adhesion.Control suitable optical cement humidity well, just can realize effectively bondingly after hot pressing, make everywhere bonding force greater than bounce, thereby suppress bounce-back.The present invention adopts vacuum drying technique, can realize fast suitable optical cement humidity, thereby improves the binding yield of capacitance plate module.
Technical scheme of the present invention: mainly study a kind of optical cement vacuum drying technique for the attaching capacitive touch screens process, can reach the purpose of rapid draing optical cement.Namely make a kind of vacuum drying chamber, this vacuum drying chamber can be created the accurate vacuum environment of a suitable temperature, with the heating that is placed in one of the ito glass (TP) of having pasted optical cement, the interior moisture content of colloid is heated rear rapidly to accurate vacuum environment pervaporation, thereby obtains quick-drying effect.Fit and hot pressing with the safety glass cover plate through the vacuum drying ito glass (TP) that posts optical cement above-mentioned again, make the first bounce-back rate decrease of pressing.
Effect of the present invention: adopt vacuum drying technique, can artificially obtain rapidly desirable optical cement humidity, the bonding force of optical cement is significantly promoted, thereby effectively suppress the bounce-back after capacitance plate module applying hot pressing, binding yield is increased substantially.Natural drying with respect to optical cement, the humidity of vacuum drying optical cement more easy to control, thus the production cycle is shortened greatly, economic benefit obviously promotes.
Embodiment 1: getting the ito glass (TP) of a 110mm * 56mm * 1.0mm specification and the thickness of a slice same size is the thick optical cement of 175um, first both are pasted together, then insert in vacuum drying chamber, vacuum drying chamber is heated to 50 ℃ of left and right, and air pressure is evacuated to below 0.3pa, keep this state to take out after dry 1 hour, itself and safety glass cover plate are fit together, again the module that posts is inserted hot pressing deaeration in the high pressure defoamer, take out cooling rear test package after 45 minutes.
A kind of optical cement quick drying technology in technology for attaching capacitive touch screens of the present invention, processing step is: be coated with on the substrate glass of nesa coating, apply optical cement (thickness is 200um), then heat drying in vacuum drying chamber, the temperature 50 C left and right, below air pressure 0.3pa, be 15min drying time.The cover glass cover sheet, carry out pneumatic heat pressure adhesive with two blocks of glass again.The present invention adopts vacuum drying technique, can artificially obtain rapidly desirable optical cement humidity, has improved the bonding force of optical cement, has effectively suppressed the appearance of capacitance plate module bubble, and the yields amplitude improves.Natural drying with respect to optical cement, the humidity of vacuum drying optical cement more easy to control, and the production cycle greatly shorten, economic benefit is obvious.The present invention relates to the technology that realizes fast of optical cement humidity, is a kind of new technology that can be widely used in attaching capacitive touch screens.
At first the quick-drying method of optical cement in the attaching capacitive touch screens process that the embodiment of the present invention provides applies optical cement being coated with on the substrate glass of nesa coating; Then the substrate glass that is coated with optical cement is carried out vacuum and heating drying; Cover glass cover sheet on substrate glass, carry out pneumatic heat pressure adhesive with substrate glass and glass protection cover plate at last; The method adopts vacuum drying technique, can artificially obtain rapidly desirable optical cement humidity, the bonding force of optical cement is significantly promoted, thereby effectively suppress the bounce-back after capacitance plate module applying hot pressing, binding yield is increased substantially, natural drying with respect to optical cement, the humidity of vacuum drying optical cement more easy to control has shortened the production cycle, has promoted overall economic efficiency, practical, have stronger propagation and employment and be worth.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. the quick-drying method of optical cement in an attaching capacitive touch screens process, is characterized in that, the method comprises the following steps:
Step 1 applies optical cement being coated with on the substrate glass of nesa coating;
Step 2 is carried out vacuum and heating drying to the substrate glass that is coated with optical cement;
Step 3, cover glass cover sheet on substrate glass carries out pneumatic heat pressure adhesive with substrate glass and glass protection cover plate.
2. the method for claim 1, is characterized in that, in step 1, the thickness that applies optical cement on substrate glass is 200um.
3. the method for claim 1, is characterized in that, the substrate glass that is coated with optical cement is carried out vacuum and heating drying in vacuum drying chamber.
4. the method for claim 1, is characterized in that, when the substrate glass that is coated with optical cement is carried out vacuum and heating drying, and the temperature 50 C left and right, below air pressure 0.3pa, be 15min drying time.
5. the method for claim 1, is characterized in that, in step 3, after substrate glass and glass protection cover plate carry out pneumatic heat pressure adhesive, needs hot pressing deaeration in the high pressure defoamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310042578.9A CN103085440B (en) | 2013-01-28 | 2013-01-28 | Optical adhesive fast drying method during capacitive touch screen laminating process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310042578.9A CN103085440B (en) | 2013-01-28 | 2013-01-28 | Optical adhesive fast drying method during capacitive touch screen laminating process |
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| Publication Number | Publication Date |
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| CN103085440A true CN103085440A (en) | 2013-05-08 |
| CN103085440B CN103085440B (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310042578.9A Expired - Fee Related CN103085440B (en) | 2013-01-28 | 2013-01-28 | Optical adhesive fast drying method during capacitive touch screen laminating process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279242A (en) * | 2013-06-04 | 2013-09-04 | 深圳市宇顺电子股份有限公司 | Capacitive touch screen fitting method |
| CN105260072A (en) * | 2015-11-02 | 2016-01-20 | 深圳市立德通讯器材有限公司 | CTP full fitting technology |
| CN109375391A (en) * | 2018-09-30 | 2019-02-22 | 云谷（固安）科技有限公司 | The process equipment and processing method of display module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630209A (en) * | 2009-06-10 | 2010-01-20 | 中国南玻集团股份有限公司 | Manufacturing method of touch screen module |
| CN101650622A (en) * | 2009-08-18 | 2010-02-17 | 城步鼎盛微电子科技有限公司 | Technology for attaching capacitive touch screens |
| CN101973155A (en) * | 2010-08-24 | 2011-02-16 | 深圳市中显微电子有限公司 | Adhering method of capacitance-type touch screen and base plate and adhering method of capacitance-type touch screen and display module |
-
2013
- 2013-01-28 CN CN201310042578.9A patent/CN103085440B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630209A (en) * | 2009-06-10 | 2010-01-20 | 中国南玻集团股份有限公司 | Manufacturing method of touch screen module |
| CN101650622A (en) * | 2009-08-18 | 2010-02-17 | 城步鼎盛微电子科技有限公司 | Technology for attaching capacitive touch screens |
| CN101973155A (en) * | 2010-08-24 | 2011-02-16 | 深圳市中显微电子有限公司 | Adhering method of capacitance-type touch screen and base plate and adhering method of capacitance-type touch screen and display module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279242A (en) * | 2013-06-04 | 2013-09-04 | 深圳市宇顺电子股份有限公司 | Capacitive touch screen fitting method |
| CN105260072A (en) * | 2015-11-02 | 2016-01-20 | 深圳市立德通讯器材有限公司 | CTP full fitting technology |
| CN109375391A (en) * | 2018-09-30 | 2019-02-22 | 云谷（固安）科技有限公司 | The process equipment and processing method of display module |
| CN109375391B (en) * | 2018-09-30 | 2021-12-07 | 云谷（固安）科技有限公司 | Processing equipment and processing method of display module |
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| CN103085440B (en) | 2015-02-25 |
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Granted publication date: 20150225 Termination date: 20160128 |