CN216979589U

CN216979589U - Antibacterial structure based on laser direct writing lithography technology

Info

Publication number: CN216979589U
Application number: CN202220639921.2U
Authority: CN
Inventors: 董坤; 桂成群; 薛兆丰; 刘星宇
Original assignee: Siwan Shanghai Semiconductor Technology Co ltd
Current assignee: Siwan Shanghai Semiconductor Technology Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-15
Anticipated expiration: 2032-03-22

Abstract

The utility model provides an antibacterial structure based on a laser direct-writing photoetching technology, which comprises a polyester film layer and an ultraviolet curing glue layer adhered on the polyester film layer, wherein the ultraviolet curing glue layer is formed by periodically arranging three shapes which are viewed as long hexagons, a first rectangle and a second rectangle, the long hexagons comprise two long edges and four bevel edges, the long edges and the bevel edges form 135 degrees, two adjacent bevel edges form 90 degrees, the long hexagons are arranged in a row direction along the orthogonal direction of the long edges, the long edge direction is a column direction, the first rectangle is respectively arranged between every two adjacent long hexagons in each row, the two adjacent long hexagons in the column direction are staggered for a certain distance in the row direction, the two opposite bevel edges of the two long hexagons in the adjacent rows are parallel, and a second rectangle is respectively arranged between the two bevel edges. The utility model adopts a hydrophobic and oleophobic structure, thereby greatly reducing the risk of water and oil accumulation on the surface of the structure and further reducing the possibility of bacterial breeding.

Description

Antibacterial structure based on laser direct writing lithography technology

Technical Field

The utility model relates to the field of micro-nano manufacturing, in particular to an antibacterial structure based on a laser direct-writing photoetching technology.

Background

The antibacterial structure is increasingly applied to the industries such as light industry, medical treatment, information household appliances and the like as a functional micron film. In the manufacturing links of digital products such as computers, tablet computers, mobile phones and the like, the antibacterial structure is reasonably applied, so that the growth of bacteria attached to the digital products with high daily use frequency can be inhibited, and chemicals can be replaced to reduce bacterial pollution caused by long-term contact and battery heat.

At present, aiming at the antibacterial measures adopted by digital products, antibacterial materials or external protective sleeve parts are mostly added in the manufacturing link of a product shell, but no ideal solution is provided for a press contact display module with the highest use frequency. In the prior art, common metal antibacterial materials are used as protective films, but the applied electronic products shield imaging display information, and the imaging function of electronic equipment can be well protected by using photocatalytic materials. Therefore, how to manufacture a high-performance micro-nano structure with an antibacterial function and display information protection in a large scale is a difficult problem to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model provides an antibacterial structure based on a laser direct-writing photoetching technology, aiming at overcoming the defects in the prior art.

The utility model relates to an antibacterial structure based on a laser direct writing photoetching technology, which comprises a polyester film layer and an ultraviolet curing glue layer adhered on the polyester film layer, wherein the ultraviolet curing glue layer is formed by periodically arranging three shapes of a long hexagon, a first rectangle and a second rectangle in front view, the size of the first rectangle is larger than that of the second rectangle,

the long hexagons are composed of two long edges and four oblique edges, the long edges and the oblique edges form 135 degrees, two adjacent oblique edges form 90 degrees, the long hexagons are arranged in a row direction and a column direction along the orthogonal direction of the long edges, one first rectangle is arranged between each two adjacent long hexagons in each row, two adjacent long hexagons in the column direction are staggered for a certain distance in the row direction, two opposite oblique edges of two long hexagons in adjacent rows are parallel, and one second rectangle is arranged between the two oblique edges.

Preferably, the thickness of the polyester film layer is 3 micrometers.

Preferably, the thickness of the ultraviolet light curing glue layer is 2 microns.

Preferably, the long sides of the long hexagons are 12 microns and the hypotenuse is 10.39 microns.

Preferably, the spacing between adjacent long hexagons in each row is 24 microns.

Preferably, the first rectangle is 12 microns long and 6 microns wide, and the minimum gap between the long sides of the first rectangle and the long sides of the long hexagon is 3 microns.

Preferably, the second rectangle is 8.5 microns long and 4.2 microns wide, with a minimum gap of 1.75 microns between the long side of the second rectangle and the hypotenuse of the long hexagon.

The utility model has the following beneficial effects:

according to the antibacterial structure based on the laser direct writing photoetching technology, the ultraviolet light curing glue layer can realize a minimum 1750 nanometer microstructure, the twin space of common cocci (with the diameter of 500-1000 nanometers) is effectively limited, and the breeding of bacteria can be reduced. The antibacterial structure provided by the utility model is provided with a polyester film (PET) layer and an Ultraviolet (UV) curing glue layer, can be used as a protective film for imaging display, does not interfere with the normal display effect, and can greatly expand the application market of the antibacterial structure.

Drawings

Fig. 1 is a schematic top view of a part of an antibacterial structure based on a laser direct-writing lithography technology of the present invention.

Fig. 2 is a partial front view schematic diagram of the antibacterial structure based on the laser direct writing lithography technology of the present invention.

Fig. 3 is a partial structural perspective view of the antibacterial structure based on the laser direct writing lithography technology of the present invention.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings. It should be noted that the embodiments mentioned in the present description are not exhaustive and do not represent the only embodiments of the present invention. The following examples are given for the purpose of clearly illustrating the utility model and are not intended to limit the embodiments thereof. It will be apparent to those skilled in the art that various changes and modifications can be made in the embodiment without departing from the spirit and scope of the utility model, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the utility model.

As shown in fig. 1 to 3, the antibacterial structure based on the laser direct writing lithography technology of the present invention includes a polyester film layer 1 and an ultraviolet light curing glue layer 2 adhered to the polyester film layer 1. The ultraviolet curing glue layer 2 is formed by periodically arranging three shapes of a long hexagon 21, a first rectangle 22 and a second rectangle 23 in front view. The size of the first rectangle 22 is larger than the size of the second rectangle 23.

Specifically, long hexagon 21 comprises two long edges and four hypotenuses, the long edge with the hypotenuse forms 135, and two adjacent hypotenuses all form 90, adopt the design of big inclination can effectively reduce greasy dirt and adhere to structure edge. The long hexagons 21 are arranged in a row direction perpendicular to the long sides and a column direction perpendicular to the long sides. One first rectangle 22 is arranged between each adjacent long hexagon 21 in each row. In addition, two adjacent long hexagons in the column direction are staggered by a certain distance in the row direction, two opposite oblique sides of the two adjacent long hexagons in the row are parallel, and one second rectangle 23 is arranged between the two oblique sides. Here, the offset distance is preferably one-half of the distance between the two long sides of the long hexagon.

In a preferred embodiment, the thickness of the mylar layer 1 is 3 microns. The thickness of the ultraviolet light curing glue layer 2 is 2 microns. The long side of the long hexagon is 12 microns, and the hypotenuse is 10.39 microns. The distance between the two long sides of each long hexagon 21 is 12 micrometers. And the spacing between adjacent long hexagons in each row is 24 microns. The pitch is the distance between the vertices of the 90 ° angle (the angle between the two hypotenuses) of adjacent long hexagons. That is, the distance between the adjacent long sides of adjacent long hexagons in each row is 12 micrometers.

Preferably, the first rectangle 22 has a length of 12 microns and a width of 6 microns, and the minimum gap between the long sides of the first rectangle 22 and the long sides of the long hexagon 21 is 3 microns. Here, the long sides of the first rectangle 22 are diametrically opposed and parallel to the long sides of the long hexagon 21.

Preferably, the length of the second rectangle is 8.5 microns, the width is 4.2 microns, and the minimum clearance between the long side of the second rectangle and the hypotenuse of the long hexagon is 1.75 microns, so that the growth of most bacteria with the diameter of less than 1 millimeter can be inhibited. Here, the long side of the second rectangle 23 is exactly opposite and parallel to the hypotenuse of the long hexagon 21.

As described above, the ultraviolet-curable glue layer 2 of the antibacterial structure of the present invention has extremely small slits (gaps) formed between the respective shaped layers (i.e., the long hexagonal layer, the first rectangular layer, and the second rectangular layer), and the water drop angle of the slits is close to 80 degrees, and thus has high hydrophobicity.

The antibacterial structure is manufactured by utilizing a laser direct writing photoetching technology, and comprises the following steps:

(a) selecting quartz glass as a laser direct writing substrate;

(b) and determining the specification of the substrate, selecting photoresist, carrying out spin coating, and then carrying out soft baking. In the step, the type of the photoresist, the specification of the substrate and the spin coating thickness are determined according to the area height required by the antibacterial structure; determining the rotary coating speed according to the photoresist type, the substrate specification and the spin coating thickness;

(c) and guiding the gray level image designed by the antibacterial structure into laser direct writing equipment, and photoetching the photoresist by adopting a gray level exposure technology. In the step, the size of the antibacterial structure needs to be designed, the gray input value is determined, a gray graph is manufactured, and laser power calculation is carried out on the antibacterial structure gray graph through laser direct writing. The grey scale map of the antimicrobial structure may have positive or negative input grey scale values. When the gray value of the input gray-scale image of the antibacterial structure adopts a negative value, the expected antibacterial structure can be obtained through 1 transfer;

(d) after the photoresist is exhausted, carrying out immersion development on the photoresist by adopting spin coating developing solution to obtain a photoresist antibacterial structure, and then carrying out hard baking (film hardening heat treatment);

(e) coating UV (Ultraviolet) curing glue on the surface of the photoresist, attaching a polyester film (PET), and performing Ultraviolet irradiation on the UV glue after die assembly;

(f) after ultraviolet irradiation and solidification, the UV glue film and the photoresist are demoulded and separated, and then baked (aged) to obtain the antibacterial structure of the utility model.

The antibacterial structure is designed to adopt a hydrophobic and oleophobic structure, so that the risk of water and oil accumulation on the surface of the structure is greatly reduced, and the possibility of bacterial breeding is reduced.

The antibacterial structure prepared based on the laser direct writing photoetching technology has the minimum microstructure size of less than 2 microns, and the diameter of common bacteria is between 0.5 micron and 5 microns, so that the twinning of most bacteria can be inhibited.

The antibacterial structure of the utility model is provided with an Ultraviolet (UV) curing glue layer, which is a single-component visible light curing high-transparency pollution-free environment-friendly adhesive and can be widely applied to various light sources and pulse light sources, the glue layer is 2 microns, the phenomena of weak light and defocusing caused by attenuation of light source incident light along with the increase of the thickness of a film substrate material are improved, and the incident light can be furthest ensured to display imaging information.

The antibacterial structure comprises a polyester film (PET) layer, is a commonly used electronic equipment touch control capacitance film, has good friction resistance, high and low temperature resistance, chemical resistance and oil resistance, adopts a 3-micron film thickness, can ensure that the film has certain resistance, also considers the characteristics of a photosensitive film, and can effectively protect the imaging display effect.

It will be apparent to those skilled in the art that the above embodiments are merely illustrative of the present invention and are not to be construed as limiting the present invention, and that changes and modifications to the above described embodiments may be made within the spirit and scope of the present invention as defined in the appended claims.

Claims

1. An antibacterial structure based on a laser direct writing photoetching technology is characterized by comprising a polyester film layer and an ultraviolet curing glue layer adhered on the polyester film layer, wherein the ultraviolet curing glue layer is formed by periodically arranging three shapes of a long hexagon, a first rectangle and a second rectangle in front view, the size of the first rectangle is larger than that of the second rectangle,

2. The laser direct write lithography based antimicrobial structure according to claim 1, wherein said polyester film layer has a thickness of 3 microns.

3. The laser direct write lithography based antimicrobial structure according to claim 2, wherein the uv curable glue layer has a thickness of 2 μm.

4. The laser direct write lithography based antimicrobial structure according to claim 3, wherein the long sides of the long hexagons are 12 microns and the hypotenuse is 10.39 microns.

5. The laser direct write lithography based antimicrobial structure according to claim 4, wherein the spacing between adjacent long hexagons in each row is 24 microns.

6. The laser direct-write lithography-based antimicrobial structure according to claim 5, wherein the first rectangle has a length of 12 microns and a width of 6 microns, and the minimum gap between the long side of the first rectangle and the long side of the long hexagon is 3 microns.

7. The laser direct write lithography based antimicrobial structure according to claim 6, wherein said second rectangle is 8.5 microns long and 4.2 microns wide, and the minimum gap between the long side of said second rectangle and the hypotenuse of said long hexagon is 1.75 microns.