CN208111327U

CN208111327U - A kind of touch film press-key structure

Info

Publication number: CN208111327U
Application number: CN201820677578.4U
Authority: CN
Inventors: 张文庆; 李锋
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2018-05-08
Filing date: 2018-05-08
Publication date: 2018-11-16
Anticipated expiration: 2028-05-08

Abstract

The utility model relates to a kind of touch film press-key structures, including PET base and cover board, cover board lower surface silk-screen has semi-transparent key figure, PET base upper surface is printed with figure layer circuit, OCA or double-sided adhesive are provided between the figure layer circuit and key figure, the figure layer circuit is silver paste figure layer circuit, and the silver paste figure layer circuit leads to PET base edge by silver paste cabling, and carbon is coated on the silver paste cabling at PET base edge and is starched；Black ink or white ink are coated in addition to key figure and visible area in the cover board lower surface.The utility model is not easily to fall off by the silver paste figure layer circuit obtained in PET base by yellow light process, and performance may；Plug connection is realized with mainboard after carbon coating pulp layer on silver paste cabling, is improved grafting point abrasion performance, is increased the reliability of electric connecting point.

Description

A kind of touch film press-key structure

Technical field

The utility model relates to a kind of film keys, refer specifically to a kind of touch film press-key structure.

Background technique

With constantly bringing forth new ideas for electronic technology and advancing by leaps and bounds for digital technology, the touch controlled key on many products is all used Film key is as control button, and film key is at low cost, simple process and the advantages application range such as good hand touch, beautiful and generous It is increasing.

Current film key is to make thin film circuit as conductive inductive material using PEDOT or ITO mostly. The thin film circuit of PEDOT class film key is to be made on PEDOT substrate or PET base substrate by silk screen printing process, PEDOT class Although film key has the advantages that simple process, technical difficulty are low, due to the limitation of silk screen printing process, line layer is easy tide Wet, the conductive coating paint of covering is easy to fall off, so that thin film circuit is easily damaged, therefore product reliability is relatively poor；And it is right In ITO class film key, thin film circuit can only be then made again, since ITO film is main by buying ITO film at present It is obtained by external import, and expensive, so that the manufacturing cost of ITO class film key is very high.

Utility model content

In order to solve the above-mentioned technical problem, it is thin to provide a kind of reliable performance, low-cost touch for the utility model Film press-key structure.

To achieve the goals above, the utility model adopts the following technical scheme：

A kind of touch film press-key structure, including PET base and cover board, cover board lower surface silk-screen have semi-transparent key figure Shape, PET base upper surface are printed with figure layer circuit, are provided with OCA or double-sided adhesive between the figure layer circuit and key figure, The figure layer circuit is silver paste figure layer circuit, and the silver paste figure layer circuit leads to PET base edge by silver paste cabling, Carbon is coated on the silver paste cabling at PET base edge to starch；It is coated in addition to key figure and visible area in the cover board lower surface Black ink or white ink.

Several gas vents are offered in PET base.

Insulating oil layer of ink is coated on silver paste figure layer circuit, the cross section of above-mentioned insulating oil layer of ink is semicircle Type.

The silver wire line width of the silver paste cabling at above-mentioned silver paste figure layer circuit and PET base edge is less than 20 microns.

The silver paste cabling at above-mentioned silver paste figure layer circuit and PET base edge is made by silver paste particle by yellow light process.

Above-mentioned silver paste particle is nano-scale particle.

The utility model uses above-mentioned technical solution, has the following advantages and effect：

1, the utility model passes through yellow light process by the silver paste particle in PET substrate surface silk-screen Nano grade size Figure layer circuit is made, process structure is simple, while coating dielectric ink on silver paste figure layer circuit and being protected；In silver paste cabling Gas vent is opened up in the PET base of two sides and carries out dehumidifying, is protected bottom silver paste cabling not aoxidized, is effectively prevented silver paste in tide Wet environment accelerates migration and the fracture of silver layer, improves the reliability of thin film switch.

2, the utility model realizes plug connection with mainboard after carbon coating pulp layer on silver paste cabling, and it is resistance to improve grafting point Abrasivity increases the reliability of electric connecting point；Simultaneously because film key, to the of less demanding of light transmittance, the utility model is adopted With the silver paste technique of MetalMesh nano-scale particle, the silver wire line width of silver paste cabling does not have to very carefully, and line width is i.e. less than 20 microns Can, therefore technology difficulty is lower.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model film press-key structure；

Fig. 2 is the structural schematic diagram of the utility model film press-key structure another embodiment；

Fig. 3 is the sectional view along A-A of Fig. 2.

Appended drawing reference is as follows：1-PET base, 2- insulating oil layer of ink, 3- key figure, 4- cover board, 5-OCA or double-sided adhesive, 6- figure layer circuit, 7- gas vent, 8- silver paste cabling, 9- carbon slurry.

Specific embodiment

Below with reference to the accompanying drawings the utility model is described in detail.For purposes of clarity, it is saved in attached drawing and explanation It has omited process unrelated with the utility model, known to persons of ordinary skill in the art, title or the expression of processing and has retouched It states.

The utility model is described further with reference to the accompanying drawing.

As shown in Figure 1-3, the utility model provides a kind of touch film press-key structure, including PET base 1 and cover board 4, silk-screen has the semi-transparent key figure 3 with the one of cover board 4 on 4 lower surface of cover board, 1 upper surface of PET base be printed with The figure layer circuit 6 of 1 one of PET base, is provided with OCA or double-sided adhesive 5 between the figure layer circuit 6 and key figure 3；Institute It states 4 lower surface of cover board and is coated with black ink 41 or white ink 41 in addition to key figure and visible area.The figure layer circuit 6 For silver paste figure layer circuit, the silver paste figure layer circuit leads to the edge of PET base 1 by silver paste cabling 8.On 1 side of PET base Carbon slurry 9 is also coated on the surface of the silver paste cabling 8 of edge, the silver paste cabling 8 at 1 edge of PET base of carbon coating slurry 9 is used as lead Electrical connection can be realized with mainboard grafting, carbon slurry has excellent wearability and electric conductivity, silver paste cabling can be protected not by oxygen Change.

For film key, to the of less demanding of light transmittance, therefore the silver wire line width on silver paste figure layer circuit does not have to Very thin, silver wire line width is less than 20 microns, and the silver paste cabling 8 at 1 edge of silver paste figure layer circuit and PET base is by nanoscale silver Particle is starched to make by yellow light process.

In order to which silver paste figure layer circuit 6 and silver paste cabling 8 is effectively protected, walked in silver paste figure layer circuit 6 and silver paste Silk screen printing process silk-screen dielectric ink is used on line 8, forms insulating oil layer of ink 2,2 silk-screen of insulating oil layer of ink is at semi-circular section Face is covered on silver paste cabling 8 or silver paste figure layer circuit 6, and the insulating oil layer of ink 2 in semi-circular section not only saves area coverage, together When also can effective protection silver paste figure layer circuit silver paste cabling.

Silver paste accelerates to migrate in wet environment in order to prevent, and several gas vents 7, the exhaust are offered in PET base 1 Hole 7 does not influence silver paste figure layer circuit 6 and silver paste cabling 8.

When the utility model makes, the silver paste particle in 1 surface coated with nano grade of PET base first passes through yellow light process Silver paste figure layer circuit of the silver wire line width less than 20 microns and the silver paste cabling 8 with silver paste figure layer circuit connection are made, then in silver Silk-screen insulating oil layer of ink and carbon coating slurry protection silver paste cabling on cabling are starched, then gas vent 7 is set in PET base 1, finally by OCA or OCR 5 are bonded with cover board 4.

Although technical solutions of the utility model have been described in detail it should be appreciated that without departing from by appended right Various changes, substitution and transformation can be carried out in the case where the spirit and scope of the utility model defined by it is required that.Moreover, this The range of application is not limited only to the specific embodiment of process, equipment described in specification, means, method or step.This Those of ordinary skill in field holds from the disclosure of the utility model it will be readily understood that can be used according to the utility model The row function essentially identical to corresponding embodiment described herein obtains the result essentially identical with it, existing and future Process, equipment, means, method or step to be developed.Therefore, the attached claims are intended to wrap in the range of them Include such process, equipment, means, method or step.

Claims

1. a kind of touch film press-key structure, it is characterised in that：Including PET base and cover board, cover board lower surface silk-screen has half Saturating key figure, PET base upper surface are printed with figure layer circuit, are provided between the figure layer circuit and key figure OCA or double-sided adhesive, the figure layer circuit are silver paste figure layer circuit, and the silver paste figure layer circuit is led to by silver paste cabling PET base edge is coated with carbon on the silver paste cabling at PET base edge and starches；The cover board lower surface except key figure and Black ink or white ink are coated with outside visible area.

2. a kind of touch film press-key structure according to claim 1, it is characterised in that：It is offered in PET base Several gas vents.

3. a kind of touch film press-key structure according to claim 1, it is characterised in that：In silver paste figure layer circuit It is upper to be coated with insulating oil layer of ink；The cross section of the insulating oil layer of ink is semi-circular.

4. a kind of touch film press-key structure according to claim 1 or 2, it is characterised in that：Silver paste figure layer electricity Road silver wire line width is less than 20 microns.

5. a kind of touch film press-key structure according to claim 4, it is characterised in that：Silver paste figure layer circuit and The silver paste cabling at PET base edge is made by silver paste particle by yellow light process.

6. a kind of touch film press-key structure according to claim 5, it is characterised in that：The silver paste particle is to receive Scale particles.