TW201435512A - Scanned type UV-LED exposure device - Google Patents

Abstract

A scanned type ultraviolet light emitting diode (UV-LED) exposure device is disclosed, which exposes a large object area by using a periodic UV-LED exposure light source with a fixed rate in an exposure task without requirement of stopping movement of device, so as to periodically repeat a use of an exposure light source to increase use efficiency of an energy source. Further, by means of alternatively arranged LEDs, uniformity of radiant illumination of an LED light source is improved, such that uniformity of exposure is improved and thus resulting in an improved yield. In addition, according to a structure design of upper and lower exposure stations and a periodic moving ring assembly of the present invention, the volume of the device is reduced, a production space and energy consumption is saved thereby reducing production cost. By means of utilizing the periodic moving ring assembly to drive the LED light source, a workpiece sufficiently employs an available space between the upper and lower exposure stations and the periodic moving ring assembly, so as to perform exposure of both the upper and lower exposure stations at the same time, thereby saving energy consumption as well as effectively and relatively increasing a production rate and therefore raising production efficiency.

Description

Scanning UV-LED exposure device

The invention relates to a scanning UV-LED exposure device, in particular to an LED exposure machine with a large area divided area exposure function, in particular to a UV-LED exposure light source with a periodic cycle at a fixed rate, for a large area. The target area does not need to stop moving during the scanning exposure process, and the purpose of increasing the energy use efficiency by increasing the exposure efficiency of the exposure light source to increase the uniformity of exposure is achieved.

In the past, the exposure machine of non-UV-LED system was large, and the production space was also large, which led to an increase in investment cost. However, the exposure process using ultraviolet (UV) is not particularly improved. The exposure light source exposes the divided area for the exposure target area. When the light source moves in different divided areas, the movement of the light source → braking → moving the light source must be repeated, so that the scanning speed is irregular and the UV light source is unstable. Such a method for exposing a certain LED position is also easy to cause insufficient irradiance and insufficient exposure uniformity, thereby lowering the yield of the product; in addition, when the prior art performs the exposure process, the light source needs to be always turned on. Therefore, the life of the UV light source is short, and the warm-light preparation operation is required before the start of each interruption, so that the light source ON/OFF is also difficult to control.
In view of the problem of the lack of uniformity of the overlapping illumination areas of the light source in the prior art, the conventional user cannot meet the needs of the user to achieve the purpose of increasing the uniformity of exposure and improving the efficiency of energy use in actual use.

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide a UV-LED exposure light source that performs periodic cycle at a fixed rate, and does not need to stop moving when scanning a large-area target area. A scanning UV-LED exposure apparatus that continuously recycles an exposure light source to increase energy use efficiency and increases exposure uniformity.
A secondary object of the present invention is to provide a scanning UV-LED exposure apparatus that can reduce the size of the apparatus, save production space and energy consumption, reduce production costs, and improve production efficiency.
For the purpose of the above, the present invention is a scanning UV-LED exposure apparatus comprising: an exposure unit comprising a set of exposure stations and a lower exposure stage spaced apart from each other, the corresponding two planes for placing the coating a substrate having a photoresist layer formed on the substrate by a photosensitive material, and two planes for placing the substrate are used as linear target exposure regions; a UV-LED illumination unit is two-dimensional a directional array of LED arrays, and the LED array is composed of a plurality of UV-LED linear strips arranged in parallel with each other, and the UV-LED strips are separated from each other, each The UV-LED linear light bar comprises a plurality of light emitting diodes linearly arranged in a longitudinal region of the light bar, and a longitudinal axis of each UV-LED linear light bar and a longitudinal axis of the linear target exposure region of the upper and lower exposure stations And a cycle of the moving ring is disposed at a central position of the upper exposure stage and the lower exposure stage in the exposure unit, and an outer side of the exposure unit is provided with a light-emitting diode composed of the UV-LED linear light strip Polar array Source, the cycle moving ring does not need to stop during the exposure process, rotates at a fixed rate, and moves the LED array light source composed of the UV-LED linear light bar outside the ring to facilitate the LED array The light source performs exposure of the linear target exposure areas of the upper and lower exposure stages in a cyclic scan manner.
In a specific embodiment, the cycle-type moving ring system includes: a driving wheel disposed at one end of the circulating cycle of the cycle to drive the rotation of the cycle of the cycle; The carrier pulley group is disposed on the inner side of the cycle period moving ring, and includes a plurality of carrier pulleys for carrying the cycle period moving ring and the weight of the UV-LED linear type light bar outside the cycle of the cycle, and assisting the The cycle of the cycle moves smoothly; an inducer is disposed in the cycle and moves relative to the other end of the drive wheel to assist the rotation of the cycle; and an active heat dissipation component is disposed in the cycle The inside of the cycle moves the ring to actively dissipate the moving ring of the cycle.
In the above embodiment, the scanning type UV-LED exposure apparatus is configured to form a horizontal cycle periodic moving structure of the upper and lower layers by the driving wheel and the induction wheel.
In the foregoing embodiment, the scanning type UV-LED exposure apparatus is disposed at an inner side of the circulation cycle moving ring and spaced apart from the driving wheel and the induction wheel.
In the foregoing embodiment, the active heat dissipating component may be a water-cooled heat dissipating component or an air-cooling heat dissipating component.
In the above embodiment, the scanning UV-LED exposure apparatus comprises a secondary optical component and a light-emitting diode light source.
The above scanning type UV-LED exposure apparatus is in the foregoing embodiment, and the secondary optical element may be a lens or a mirror.
In the above embodiment, the UV-LED linear light strip can be a lens type linear light strip or a mirror type linear light strip.
In a specific embodiment, the scanning UV-LED exposure device is further provided with a diffusion plate over the LED array, and the diffusion plate covers the LEDs.
In the above embodiment, the diffusion type UV-LED exposure apparatus covers the light-emitting diodes in a one-piece structure.
In the above embodiment, the diffusion type UV-LED exposure apparatus covers the light-emitting diodes with a rib structure.
In the above embodiment, the diffusion type UV-LED exposure apparatus covers the light-emitting diodes in a plurality of strip structures.
In the above embodiment, the diffusion type UV-LED exposure apparatus is a UV-resistant material, and may be quartz or glass.
In the above embodiment, the scanning UV-LED exposure device is in the upward rotation and downward rotation of the outer UV-LED linear light bar when the cycle is moved upward and downward at the two end points. Each of the light emitting diode systems can be further controlled to be in a closed state.
In the above embodiment, the UV-LED linear light strips are arranged in a direction parallel to the longitudinal axis of the linear target exposure area.
In a specific embodiment, the scanning UV-LED exposure device is arranged in a misaligned manner in the adjacent two columns of the UV-LED linear light strips.

100. . . Scanning UV-LED exposure device

10. . . Exposure unit

11. . . Upper exposure station

12. . . Lower exposure station

13. . . Linear target exposure area

20. . . UV-LED lighting unit

twenty one. . . LED array light source

twenty two. . . UV-LED line light strip

twenty three. . . Light-emitting diode

twenty four. . . Diffuser

231. . . Secondary optics

232. . . Light-emitting diode source

30. . . Cycle cycle

31. . . Driving wheel

32. . . Pulley wheel group

321. . . Pulley wheel

33. . . Induction wheel

34. . . Active heat sink

Fig. 1 is a schematic view showing the structure of the present invention.
2 is a top plan view of a UV-LED lighting unit in accordance with an embodiment of the present invention.
Figure 3 is a top plan view of a UV-LED lighting unit in accordance with another embodiment of the present invention.

Please refer to FIG. 1 to FIG. 3, which are schematic views of the structure of the present invention, a schematic view of a UV-LED illumination unit according to an embodiment of the present invention, and a UV-in another embodiment of the present invention. A schematic view of the LED lighting unit. As shown in the figure: the invention is a scanning UV-LED exposure device, which is an LED exposure machine with a large-area divided area exposure function, which can transmit the illumination light received by the light source through the reticle, corresponding to the workpiece. The target exposure area is projected to be illuminated. The scanning UV-LED exposure apparatus 100 includes at least an exposure unit 10, a UV-LED illumination unit 20, and a cyclic period moving ring 30.
The exposure unit 10 mentioned above comprises a set of exposure stations 11 and a lower exposure stage 12 spaced apart from each other, and the corresponding two planes are used for placing a substrate coated with a photoresist layer (not shown). The resist layer is formed of a photosensitive material formed on the substrate, and the two planes on which the substrate is placed are used as the linear target exposure region 13.
The above-mentioned UV-LED illumination unit 20 is composed of a two-dimensionally arranged light-emitting diode array light source 21, and the light-emitting diode array light source 21 is composed of a plurality of UV-LED linear light strips 22 arranged in parallel with each other. The UV-LED linear light strips 22 are mutually separated from each other, and each of the UV-LED linear light strips 22 includes a plurality of light-emitting diodes 23 arranged linearly in a longitudinal region of the light strip, and each UV- The longitudinal direction of the LED linear strips 22 is perpendicular to the longitudinal axes of the linear exposure regions 13 of the upper exposure stage 11 and the lower exposure stage 12.
The cyclic cycle moving ring 30 mentioned above is disposed at a central position of the upper exposure stage 11 and the lower exposure stage 12 in the exposure unit 10, and is disposed on the outer side thereof to form the UV-LED linear type light bar 22 at intervals. The light emitting diode array light source 21.
The UV-LED linear light strips 22 are arranged in parallel with the longitudinal axis of the linear target exposure area 13, and the light-emitting diodes 23 in the adjacent columns of the UV-LED linear light strips 22 are arranged in a misaligned manner. As shown in Fig. 2, the radiant energy of each of the UV-LED linear strips 22 can be effectively superimposed.
The light-emitting diode 23 includes a secondary optical element 231 and a light-emitting diode light source 232. When the secondary optical element 231 is a lens, the UV-LED linear light strip 22 is a lens type. The linear light bar is as shown in Fig. 2; when the secondary optical element 231 is a mirror, the UV-LED linear light bar 22 is a mirror type linear light bar, as shown in Fig. 3.
The cyclic cycle moving ring 30 includes a driving wheel 31, a carrier pulley group 32, an induction wheel 33, and an active heat dissipating component 34. The circulating cycle moving ring 30 is composed of the driving wheel 31 and the induction wheel 33. The horizontal loop period moving structure of the upper and lower layers is formed. The driving wheel 31 is disposed at one end of the circulating cycle moving ring 30 for driving the rotation of the circulating cycle 30; the carrier wheel group 32 includes a plurality of carrier pulleys 321 The 321 series are disposed at an inner side of the circulating cycle moving ring 30, and are spaced apart from the driving wheel 31 and the induction wheel 33 by an appropriate spacing for carrying the cycle period moving ring 30 and the cycle moving ring. 30 The weight of the outer UV-LED linear light bar 22, and assists the rotation of the moving ring 30 in the cycle; the induction wheel 33 is disposed in the cycle of the moving ring 30 and opposite to the other end of the driving wheel 31, to assist the Rotating the rotation of the ring 30; and the active heat dissipating component 34 is disposed inside the cycle of the moving ring 30 for actively dissipating the cycle ring 30, wherein the active heat dissipating component 34 can be a Water-cooled heat sink or an air-cooled heat sink.
The diffusing plate 24 is further disposed on the upper surface of each of the light emitting diodes 23, and the diffusing plate 24 is made of a UV transparent material. Quartz or glass. In a specific embodiment, the diffusion plate 24 is covered with a whole structure over the LEDs 23, as shown in FIG. 1; in another specific embodiment, the diffusion plate 24 is a The rib structure covers the LEDs 23; in still another embodiment, the diffusion plate 24 covers the LEDs 23 in a plurality of strip structures.
As described above, a new scanning UV-LED exposure apparatus 100 is constructed.
When in use, the cycle moving ring 30 does not need to stop during the exposure process, and its rotation is mainly driven by the driving wheel 31, and is assisted by the induction wheel 33 to rotate at a fixed rate, and the UV-LED line type is moved outside the ring. The light-emitting diode array light source 21 is composed of the light bar 22, so that the light-emitting diode array light source 21 performs exposure of the linear exposure target area 13 of the upper exposure stage 11 and the lower exposure stage 12 in a cyclic scan manner. Moreover, when the cycle period moving ring 30 is rotated upward and downward at the two end points, the outer UV-LED line type light bar can be further controlled at each of the light-emitting diodes 23 at the upward rotation and the downward rotation. In order to close the state, the life of the light source can be extended to further save energy consumption.
Therefore, the scanning UV-LED exposure apparatus of the present invention uses a UV-LED exposure light source which performs periodic cycle at a fixed rate, and does not need to stop moving when scanning a large-area target area is performed, and the exposure light source can be obtained. Continuously recycling and increasing the efficiency of energy use, and increasing the uniformity of the illuminance of the light-emitting diode array light source to the linear target exposure area by misalignment, thereby increasing the uniformity of exposure, thereby effectively improving the yield of the product; The invention adopts the structural design of the upper and lower exposure stage and the circulation cycle moving ring, which can reduce the volume of the device, save production space and energy consumption, and reduce the production cost, and use the cycle to move the ring to drive the light-emitting diode array light source to make the workpiece up and down. The space between the exposure stage and the cycle-period moving ring can make full use of the space to simultaneously expose the upper and lower exposure stages, thereby saving energy consumption and effectively increasing the production speed to achieve higher production efficiency.
In summary, the present invention is a scanning UV-LED exposure device, which can effectively improve various shortcomings of the conventional use, and uses a UV-LED exposure light source with a periodic cycle at a fixed rate to perform a scanning exposure process on a large-area target area. When the movement is not required, the exposure light source can be continuously recycled and reused to increase the energy use efficiency, the exposure uniformity can be increased, the device volume can be reduced, the production space and energy consumption can be saved, the production cost can be reduced, and the production efficiency can be improved. In turn, the invention can be made more progressive, more practical, and more in line with the needs of the user. It has indeed met the requirements of the invention patent application, and has filed a patent application according to law.
However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

100. . . Scanning UV-LED exposure device

10. . . Exposure unit

11. . . Upper exposure station

12. . . Lower exposure station

13. . . Linear target exposure area

20. . . UV-LED lighting unit

twenty two. . . UV-LED line light strip

twenty three. . . Light-emitting diode

twenty four. . . Diffuser

30. . . Cycle cycle

31. . . Driving wheel

32. . . Pulley wheel group

321. . . Pulley wheel

33. . . Induction wheel

34. . . Active heat sink

Claims (16)

A scanning UV-LED exposure apparatus includes:
An exposure unit comprising a plurality of upper and lower exposure stages spaced apart from each other, wherein the corresponding two planes are used for placing a substrate coated with a photoresist layer formed of a photosensitive material on the substrate Above, and placing the two planes of the substrate as linear target exposure areas;
A UV-LED illumination unit is composed of a light-emitting diode array light source arranged in a two-dimensional direction, and the light-emitting diode array light source is composed of a plurality of UV-LED linear light strips arranged in parallel with each other, and the UVs - LED linear light strips are mutually separated from each other, each UV-LED linear light strip comprises a plurality of light emitting diodes arranged linearly in a longitudinal region of the light strip, and the longitudinal direction of each UV-LED linear light strip is The longitudinal axes of the linear target exposure areas of the upper and lower exposure stages are perpendicular to each other; and a cycle-period moving ring is disposed at a central position of the upper exposure stage and the lower exposure stage interval in the exposure unit, and is disposed at an outer interval thereof Laying the light-emitting diode array light source composed of the UV-LED linear light strip, the cycle moving ring does not need to stop when performing the exposure process, and rotates at a fixed rate, and the UV-LED linear light strip on the outer side of the moving ring is formed. The LED array light source is used to expose the linear target exposure area of the upper and lower exposure stages in a cyclic scan manner. The scanning type UV-LED exposure apparatus according to claim 1, wherein the cyclic period moving ring system comprises:
a driving wheel is disposed at one end of the moving ring of the cycle to drive the rotation of the moving ring of the cycle;
A support pulley group is disposed on the inner side of the cycle period moving ring, and includes a plurality of carrier pulleys for carrying the cycle cycle moving ring and the weight of the UV-LED linear type light bar outside the cycle of the cycle, and assisting The cycle of the moving ring rotates smoothly;
An inducer wheel is disposed on the cycle of the cycle and is opposite to the other end of the drive wheel for assisting rotation of the cycle of the cycle; and an active heat dissipating component is disposed inside the cycle of the cycle ring for Active cooling of the moving ring of the cycle. The scanning type UV-LED exposure apparatus according to claim 2, wherein the cycle-period moving ring is formed by the driving wheel and the inducer to form a horizontal circulation period moving structure of the upper and lower layers. The scanning type UV-LED exposure apparatus according to claim 2, wherein the plurality of carrier pulleys are spaced apart from each other inside the circulation cycle moving ring, and have a relationship between the driving wheel and the induction wheel The spacing is separated. The scanning UV-LED exposure apparatus according to claim 2, wherein the active heat dissipating component is a water-cooling heat dissipating component or an air-cooling heat dissipating component. The scanning UV-LED exposure apparatus according to claim 1, wherein the light emitting diode system comprises a secondary optical component and a light emitting diode light source. The scanning UV-LED exposure apparatus of claim 6, wherein the secondary optical component is a lens or a mirror. The scanning UV-LED exposure apparatus according to claim 1, wherein the UV-LED linear light strip can be a lens type linear light strip or a mirror type linear light strip. The scanning UV-LED exposure apparatus according to the first aspect of the invention, wherein the light-emitting diode array light source is further provided with a diffusion plate, and the diffusion plate covers the light-emitting diodes. The scanning type UV-LED exposure apparatus according to claim 9, wherein the diffusion plate covers the respective light-emitting diodes in a one-piece structure. The scanning type UV-LED exposure apparatus according to claim 9, wherein the diffusion plate is covered with a rib structure over the respective light emitting diodes. The scanning UV-LED exposure apparatus according to claim 9, wherein the diffusion plate covers a plurality of strips over the respective LEDs. The scanning UV-LED exposure apparatus according to claim 9, wherein the diffusion plate is a UV-resistant material and may be quartz or glass. The scanning type UV-LED exposure apparatus according to claim 1, wherein the outer cycle of the UV-LED linear light bar is rotated upward when the cycle is moved upward and downward at both ends. And each of the light-emitting diode systems at the downward rotation can be further controlled to be in a closed state. The scanning UV-LED exposure apparatus of claim 1, wherein the UV-LED linear strips are arranged in a direction parallel to a longitudinal axis of the linear target exposure area. The scanning UV-LED exposure apparatus according to claim 1, wherein the light-emitting diode systems in adjacent ones of the UV-LED linear light strips are misaligned.