KR20160041871A - Apparatus and Method for drying or sintering material - Google Patents

Abstract

The present invention relates to a device and a method for drying and sintering a material using a laser and, more specifically, relates to a device and a method for drying and sintering the material using the laser, wherein the device for drying and sintering the material reduces a repairing time by spraying the material with fluidity such as ink or powder when a substrate such as an FPD and a PCB is repaired using the material with fluidity and drying and sintering the sprayed material at the same time. The device for drying and sintering the material also repairs a failure which is difficult to be repaired, and applies the material with fluidity such as the ink or the powder to 3D printing. The device for drying and sintering a material using a laser comprises: a spray module spraying the material; a laser source supplying a laser beam to dry and sinter the sprayed material; a beam control module controlling a shape of the laser beam supplied from the laser source; and an optical module radiating the laser beam in which the shape is controlled by the beam control module to the sprayed material. According to the device and the method for drying and sintering a material using a laser, the material can be sprayed, dried, and sintered at the same time during a process of repairing a failure, and does not require to pass through an additional drying and sintering process; thereby reducing a time of repairing the failure, and the device having a simple composition. Moreover, the failure, which cannot be repaired as an existing device uses a material with fluidity such as ink or powder, can be repaired; and a three-dimensional structure can be manufactured as the material with the fluidity which cannot be applied to an existing 3D printing is applied.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a drying and sintering material,

The present invention relates to an apparatus and a method for dry-sintering a material using a laser, and more particularly, to a method for forming a pattern or sintering a target by spraying a material made of ink or powder in the form of a substrate or an object, And drying and sintering the material for drying and sintering.

Recently, the spread of various mobile devices including smart phones and tablet PCs has grown rapidly, and FPDs and PCBs of various sizes have been increasing rapidly as the share of TVs adopting FPDs such as LCDs and OLEDs has increased.

A substrate on which circuit wiring such as an FPD or a PCB is formed is manufactured through various process steps, and defects are generated in the circuit wiring substrate due to various factors during the process. These defects occur not only in defects in which the driving circuit wiring for driving the FPD and the PCB are open / shorted but also in the color filters included in the display of the FPD, and there is a problem that the yield is decreased due to such defects.

Conventionally, the number of such defects has been determined based on the number of defects. However, if the circuit wiring or the driving element is short-circuited or short-circuited in recent years, it may be a normal product by cutting or wiring the part, And the mass production yield is increased by using a device for repairing it.

Conventional defect repair devices use a laser to break shorted wiring parts or spray powder material and then sinter using laser to connect the open wiring part. However, not only the problem of substrate damage due to laser but also CVD Therefore, there is a problem in that the chamber is indispensably required, the structure is complicated, and defects can not be repaired at room temperature.

In order to overcome the disadvantages of such a conventional defect repairing apparatus, a method of repairing defects by drying or sintering a jetted material by irradiating a laser beam onto the jetted material after jetting the ink material has recently become popular. In this method, There is a problem that the time required for repairing defects is long and the height of the wiring to be repaired is limited due to drying and sintering of the sprayed material by irradiating a laser in a separate process step. That is, since the ink material is in a liquid state with fluidity, it is difficult to form the wiring at a certain height or more since it flows down during the process of entering the separate process after injection.

In addition, in the case of 3D printing in recent years, a support structure is necessary to support a section to be molded in order to form a three-dimensional structure. Therefore, there is a difficulty in applying materials having fluidity after injection such as ink or powder. There is a problem that only limited material is applied.

JP 2007-281435 A

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method of repairing a substrate such as an FPD or a PCB by using a fluid material such as ink or powder, The present invention provides a drying and sintering apparatus and method using a laser capable of shortening the time and repairing defects that are difficult to repair and applying a fluid material such as ink or powder to 3D printing.

In order to accomplish the above object, the present invention provides a drying and sintering apparatus using a laser, the apparatus comprising: a spray module movably installed to spray the material; a laser source for supplying a laser beam for drying and sintering the sprayed material; An optical module for irradiating an annular laser beam adjusted by the beam adjusting module around a position where the material is injected, And the optical module moves the laser beam of the annular shape irradiated around the position where the material is injected to the position where the material is injected in accordance with the movement of the injection module.

Also, the beam adjusting module may include a conical lens, and the shape of the laser beam may be adjusted to an annular shape using the conical lens.

Further, the beam adjusting module may further include a focusing lens, and the position of the focusing lens may be adjusted to adjust the size of the annular laser beam.

In addition, the beam adjusting module includes an annular slit, and the shape of the laser beam can be adjusted to an annular shape using the slit.

In addition, the injection module may include an ink nozzle for ejecting an ink-like material.

Further, in the ink nozzle, the ink-like material can be injected using electrohydraulic.

In addition, the injection module may include a spray nozzle for spraying a powdery material.

According to another aspect of the present invention, there is provided a method of drying and sintering a material using a laser, the method comprising: spraying the material onto an injection position using an injection module; Supplying a laser beam through a laser source to dry and sinter the sprayed material; Adjusting the shape of the laser beam to an annular shape; Irradiating the laser beam of the annular shape having the shape adjusted to the periphery of the injection position where the material is injected using the optical module; And moving the injection module to move an annular laser beam irradiated around the injection position to the injection position.

In addition, in the step of spraying the material, the material is an ink-like material and can be sprayed using electrohydraulics.

Also, in the step of adjusting the shape of the laser beam, the shape of the laser beam may be adjusted in an annular shape using the beam adjusting module including the conical lens.

Further, in the step of adjusting the shape of the laser beam, the beam adjusting module may further include a focusing lens, and adjusting the size of the annular laser beam by adjusting the position of the focusing lens.

Also, in the step of adjusting the shape of the laser beam, the shape of the laser beam can be adjusted in an annular shape using the beam adjusting module including the slit.

The present invention having the above-described structure has an effect that the material can be dried and sintered simultaneously with the spraying of the material in the process of repairing defects.

In addition, since there is no need to perform a process of drying and sintering separately, the time for repairing defects can be reduced and the structure of the equipment can be simplified.

In addition, there is an effect of repairing defects that could not be repaired using a fluid material such as conventional ink or powder.

In addition, there is an effect that a three-dimensional structure can be manufactured by applying a material having fluidity that could not be applied in conventional 3D printing.

FIG. 1 is a conceptual diagram of a drying and sintering apparatus using a laser according to an embodiment of the present invention,
FIGS. 2A and 2B are diagrams showing the structure of a first embodiment of a beam adjusting module in a dry sintering apparatus using a laser according to the present invention,
3 is a view showing the configuration of the second embodiment of the beam adjusting module in the material sintering apparatus using the laser of the present invention,
4 is a view showing a post-spray drying and sintering process of a dry sintering apparatus using a laser according to the present invention,
5 is a view for explaining a process of controlling the size of an annular beam in a dry sintering apparatus using a laser according to the present invention,
6 is a flowchart of a method of drying and sintering a material using the laser of the present invention.

Hereinafter, an apparatus and a method for drying and sintering a work using a laser according to the present invention will be described in detail with reference to the drawings.

1 is a conceptual diagram of a drying and sintering apparatus using a laser according to an embodiment of the present invention.

Referring to FIG. 1, a drying and sintering apparatus using a laser according to the present invention will be described. A drying and sintering apparatus using a laser according to the present invention includes a spray module for spraying a material suitable for repairing defects such as FPD, A laser source 200 for supplying a laser beam to obtain heat for drying or sintering the material injected from the injection module 100; And an optical module 400 for irradiating the laser beam adjusted by the beam adjusting module 300 to the sprayed material so that the sprayed material is dried and sintered.

The material drying and sintering apparatus using the laser of the present invention is mainly applied to an apparatus utilizing a metal material which is dried and sintered at a high temperature, and it includes circuit elements for driving electronic components such as FPD and PCB, The present invention can be applied to an apparatus for repairing defects of a substrate 10 on which a substrate 15 is formed or spraying a material and drying and sintering the substrate 10 to form a three-dimensional structure.

Defects occurring in the substrate 10 on which the wiring patterns 15 are formed are caused by various factors during the manufacturing process, but foreign materials are mainly removed from the defects in which foreign substances are introduced during the process and the wirings formed on the substrate 10 are opened or shorted Conductive material is used for the damaged wiring to form a normal circuit wiring.

When a conductive material is sprayed in the form of ink or powder, it is necessary to evaporate the solvent contained in the ink and to sinter and solidify the sprayed material in order to form a wiring. Even when spraying the powder material, the drying process is not necessary unlike the ink, but the sintering process for forming the wiring is essential.

As described above, conventionally, in the case of repairing a wiring formed on a substrate 10 using a material such as ink, a material made of ink or the like is sprayed, and the stage is moved for drying and sintering There is a problem in that there is a defect such as thick wiring that can not be repaired because it takes a lot of time to repair the defect and the shape of ink or the like has fluidity.

The drying and sintering apparatus using the laser according to the present invention can dramatically reduce the time required to repair defects by irradiating the laser to the sprayed material and drying or sintering the material simultaneously with the spraying of the material, 3D printing, which is capable of repairing defects normally, can be made in ink or powder form in 3D printing to produce 3D structures, and then dried and sintered at the same time as spraying on the object. .

The injection module 100 of the present invention is a structure for spraying the material when repairing defects of the substrate 10 or fabricating a three-dimensional structure. The injection module 100 injects a variety of materials in a suitable manner. When injecting an ink-like material, pneumatic pressure may be used, or heating or a piezoelectric element may be used. Since the jetting module 100 of the present invention only needs to jet the ink-like material, any method may be used as long as it is suitable for the material. However, a spraying method in which conductive ink is discharged by using electrohydraulics is suitable for the dry sintering apparatus of the present invention in terms of precision.

In addition, the injection module 100 may be a method of discharging a powdery material. In this case, it may be necessary to coat the powder so that the temporary adhesion between the powders is maintained, or the powdery material may be sintered at the same time It may be necessary to reduce the size of the laser beam irradiated around the firing module 100. This is because, in the case of the powder, compared to the ink form, there is a possibility of flowing simultaneously with the spraying.

The laser source 200 of the present invention performs a function of supplying a laser beam for supplying heat required for drying and sintering the material injected from the injection module 100. The laser beam supplied from the laser source 200 can be selected and applied to an appropriate wavelength band and an output band according to the material to be jetted, and it is usually convenient to use a carbon dioxide laser capable of high output as an industrial laser. Of course, depending on the material, it may be necessary to use a low output power, or if the absorption rate is excellent at a specific wavelength band, the laser of the corresponding wavelength band may be used.

The beam adjusting module 300 of the present invention is a structure for adjusting the shape of the laser beam 210 supplied from the laser source 200. 2A and 2B are views showing a first embodiment of the beam adjustment module 300. The beam adjustment module 300 of the present invention includes a beam adjustment module 300 for modifying the laser beam 210 supplied from the laser source 200, And changes the shape of the laser beam 210 so that the sprayed material can be dried and sintered simultaneously with spraying. It is preferable to control the shape of the laser beam in an annular shape because the laser beam of an annular shape passes through the sprayed material regardless of the direction of the injection module 100 . Of course, in order to dry and sinter simultaneously with spraying, it is preferable to irradiate the laser beam to the sprayed position, but in this case, since the sprayed material is scattered due to the irradiated laser beam or the shape thereof is likely to be disturbed, . Referring to FIG. 4, it can be explained that dry sintering is possible at the same time as jetting, and there is no problem in drying and sintering regardless of the direction of the jetting module 100. For example, when the jetting module 100 moves from left to right, Shaped laser beam is irradiated from the rear of the injection module 100, there is a problem that the laser beam can not be accurately irradiated to the sprayed material when moving in a straight direction or moving in a curved shape. In contrast, when the annular laser beam 310 is irradiated to surround the nozzle 150 for spraying the material in the injection module 100, the laser beam is applied to the injected material regardless of the direction of the injection module 100 It is possible to investigate.

Referring to FIG. 2A, a first embodiment of the beam adjustment module 300 for adjusting the laser beam supplied from the laser source 200 into an annular shape will be described. When a laser beam is incident on the conical lens 320, The laser beam is changed into an annular shape due to the conical lens 320 passing through the lens 320. 2A, an annular laser beam is produced by using two conical lenses 320. However, in order to prevent the size of the annular beam from varying according to the height of the beam adjusting module 300 by forming a parallel annular beam, It is possible to use only one conical lens 320 when the height of the beam adjusting module 300 is constant.

FIG. 2B is a view showing a state in which the focus lens 330 is disposed between the conical lenses 320 and the focus lens 330 is moved left and right to adjust the size of the annular beam incident on the right conical lens 320, The size of the annular beam irradiated around the beam spot can be simply controlled. Of course, the size of the annular beam can be adjusted even if the focus lens 330 is positioned at the end of the right lens, not between the lenses 320 of the conical shape.

3 is a view illustrating a second embodiment of the beam adjustment module 300. In order to adjust the shape of the laser beam in a desired shape, a slit 350 having a desired shape is used. When the laser beam is irradiated on the slit 350, the laser beam passes through the slit 350, so that the laser beam can be adjusted to a desired shape. After the laser beam passes through the slit 350, the focus lens 330 may be disposed to adjust the size of the laser beam irradiated around the injection module 100.

5 is a view showing another method of adjusting the size of the laser beam whose shape is adjusted. In the middle of the laser beam, a beam splitter 360 is disposed, a concave or convex conical mirror 370 is arranged on the upper and lower sides, When the beam is reflected by the beam splitter 360 and emitted into the annular shape, the focus lens 330 is disposed at the end of the laser beam to move the focus lens 330 to the left and right to adjust the size of the annular beam . When the beam splitter 360 passes / reflects only the specific polarized light, a polarizing plate 380 may be disposed at the front end of the conical mirror 370 to adjust the polarization direction.

The beam adjusting module 300 of the present invention is not limited to the above-described method, but may be of any type as long as it can adjust the shape of the laser beam to a desired shape. However, as described above with reference to FIG. 4, It is advantageous that the sprayed material can be dried and sintered almost simultaneously with spraying regardless of the moving direction and the shape of the injection module 100. [

The optical module 400 controls the optical path of the laser beam whose shape is controlled by the beam adjusting module 300 and irradiates the optical path around the injection module 100. In order to adjust the optical path in a desired direction, the optical module 400 may use a scanner, but a driver lens and a mirror may be combined to control the optical path of the laser beam whose shape is adjusted. That is, it is irrelevant to adopt any method as long as the optical path of the laser beam can be adjusted as desired.

FIG. 6 is a flowchart illustrating a method of drying and sintering a material using the laser of the present invention. Referring to FIG. 6, a method of drying and sintering a material using the laser of the present invention will be described.

First, the method of drying and sintering a material using laser according to the present invention repairs defects on a pattern 15 or ejects a material onto a substrate 10 or an object to manufacture a three-dimensional structure. (S100) A laser beam for supplying heat required for drying and sintering the material is supplied through a laser source 200. S110 The laser beam supplied from the laser source 200 is supplied to a jetting module (S120) The laser beam whose shape is adjusted is irradiated around the injection module 100 by adjusting the optical path using the optical module 400 (S130). The shape of the laser beam is adjusted so that the laser beam can be irradiated around the injection module 100, so that it can be dried and sintered almost at the same time as the injection of the material, so that it is possible to repair defects that are difficult to repair in the past, It is possible to produce a three-dimensional structure using one material.

Substrate: 10 Injection module: 100
Laser source: 200 beam adjustment module: 300
Optical module: 400

Claims (12)

In a dry sintering apparatus using a laser,
A spray module movably installed to spray the material,
A laser source for supplying a laser beam for drying and sintering the sprayed material,
A beam adjusting module for adjusting the shape of the laser beam supplied from the laser source in an annular shape,
And an optical module for irradiating a laser beam of an annular shape adjusted in the beam adjusting module around a position where the material is injected,
Wherein the optical module moves an annular laser beam irradiated around a position where the material is injected to a position where the material is injected in accordance with movement of the injection module.
In claim 1,
Wherein the beam conditioning module comprises a conical lens,
Wherein the shape of the laser beam is adjusted to an annular shape by using the conical lens.
In claim 1,
Wherein the beam conditioning module further comprises a focusing lens,
Wherein the laser beam size of the annular shape is adjusted by adjusting the position of the focusing lens.
In claim 1,
Wherein the beam adjustment module includes an annular slit,
Wherein the shape of the laser beam is adjusted to an annular shape using the slit.
In claim 1,
Wherein the jetting module includes an ink nozzle for jetting an ink-like material.
In claim 5,
Wherein the ink-like material in the ink nozzle is sprayed using an electrohydraulic method.
In claim 1,
Wherein the spray module includes a spray nozzle for spraying a powdery material.
A method of dry-sintering a material using a laser,
Spraying the material onto an injection position using an injection module;
Supplying a laser beam through a laser source to dry and sinter the sprayed material;
Adjusting the shape of the laser beam to an annular shape;
Irradiating the laser beam of the annular shape having the shape adjusted to the periphery of the injection position where the material is injected using the optical module;
And moving the injection module to move an annular laser beam irradiated around the injection position to the injection position.
In claim 8,
In the step of spraying the material,
Wherein the material is an ink-like material and is sprayed using an electrohydraulic method.
In claim 8,
In the step of adjusting the shape of the laser beam,
Wherein the shape of the laser beam is adjusted in an annular shape by using the beam adjusting module including the conical lens.
In claim 10,
In the step of adjusting the shape of the laser beam,
Wherein the beam adjusting module further comprises a focusing lens and adjusting the size of the annular laser beam by adjusting the position of the focusing lens.
In claim 8,
In the step of adjusting the shape of the laser beam,
Wherein the shape of the laser beam is adjusted in an annular shape using the beam adjustment module including the slit.

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