Liquid material application method and liquid material application apparatus

Abstract

This invention provides a liquid material application method and a liquid material application device. The liquid material application method includes: providing a liquid material application device, a moving mechanism provided on a machine table, the moving mechanism being provided with a glue valve for liquid material application; for a predetermined coating unit path, allocating the liquid material extrusion amount and the number of times the glue valve controller triggers a signal during liquid material application according to the unit path, adopting a variable liquid material extrusion application point frequency method during triggering, and performing remainder processing on excess liquid material extrusion points; thereby optimizing the application of liquid material.

Description

Technical Field

[0001] This invention relates to a liquid material application method and liquid material application equipment, and more particularly to a piezoelectrically driven liquid material application method and liquid material application equipment. Background Technology

[0002] In general chip packaging processes, there is often a need to bond two components together, such as attaching a die to a substrate or attaching a heat sink to both the substrate and the die. This bonding operation usually uses a glue valve that can apply a viscous liquid material to the workpiece by extrusion. In order to perform liquid material application at high speed, such glue valves have been developed to use piezoelectricity to drive a plunger to extrude the liquid material contained in a liquid chamber. The extruded liquid material is usually applied to the surface of the workpiece in a "dot" manner. In a predetermined coating length, the number of liquid material dots to be extruded and the size of each dot are usually calculated first, and the glue valve is driven by a trigger signal. Each trigger usually applies a fixed number of predetermined dots, such as one dot or three dots, as a fixed application frequency.

[0003] Please see Figure 1 The existing liquid material application method, when the predetermined coating unit path L is known, involves the operator applying liquid material extrusion at three points as the controller trigger signal for each glue valve, with the number of extrusions occurring after the first trigger d1, the second trigger d2, and so on. After the fifth trigger (d5), there may be only one more point to complete the unit path L. Triggering again is inappropriate, as it will cause coating outside the unit path L. To solve this problem, the frequency of liquid material extrusion points triggered by the glue valve controller should be set to one point or an even number of points each time. However, while this frequency setting can still reach the predetermined unit path L, it will undoubtedly increase the number of triggers. If one point is extruded each time, 16 triggers are needed; if two points are extruded each time, 8 triggers are needed. Compared to the original method of extruding three points each time (only 6 triggers), the liquid material extrusion coating speed will slow down, leading to a decrease in total output and failing to meet expected efficiency. Furthermore, excessively frequent triggering of the glue valve controller signal will require a large amount of data processing during the operation, reducing data transmission speed and causing excessive waiting time for data processing.

[0004] Please see Figure 2Another solution is to extrude the three points of the sixth trigger d6 onto the same position, thus achieving complete coating of the unit path L. However, this will result in the extruded liquid material at the position of the sixth trigger d6 having three points. At this point, due to the excessive liquid material, slight errors will accumulate continuously, eventually causing significant deviations and resulting in defective products. There are indeed areas for improvement in the current liquid material application method. Summary of the Invention

[0005] Therefore, the object of the present invention is to provide a liquid material application method that allows the liquid material to be applied in a more optimized manner.

[0006] Another object of the present invention is to provide a liquid material application device using the liquid material application method.

[0007] The liquid material application method according to the present invention includes: providing a liquid material application device, wherein a moving mechanism is provided on a machine table, and the moving mechanism is provided with a glue valve for liquid material application; for a predetermined coating unit path, allocating the liquid material extrusion amount and the number of times the controller of the glue valve is triggered during liquid material application according to the unit path, and performing remainder processing on the excess liquid material extrusion points by adopting a variable liquid material extrusion point frequency method during triggering.

[0008] According to another object of the present invention, a liquid material application apparatus can be used to perform the liquid material application method as described above.

[0009] The liquid material application method and liquid material application equipment of the present invention adopt a variable liquid material extrusion application point frequency method when the controller of the glue valve is triggered, which can appropriately control the number of times the controller of the glue valve is triggered, so that the motor moving speed does not have to be reduced due to data processing, and the liquid material can be applied in a more optimized manner, thereby improving operating efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of an existing technology for a liquid material application method.

[0011] Figure 2 This is a schematic diagram of an existing technology for another liquid material application method.

[0012] Figure 3 This is a three-dimensional schematic diagram of a liquid material application device, used to illustrate an embodiment of the present invention.

[0013] Figure 4 This is a schematic diagram of the liquid material application equipment using a rubber valve.

[0014] [Symbol Explanation]

[0015] 1: Machine table surface

[0016] 2: Mobile mechanism

[0017] 21: Seat

[0018] 211: Slide rail

[0019] 22: Crossbeam

[0020] 221: Slide rail

[0021] 23: Fixed base

[0022] 24: Track

[0023] 241: Slide rail

[0024] 242: Slide

[0025] 3: Operating mechanism

[0026] 31: Glue Valve

[0027] 32: Rangefinder

[0028] 33: Controller

[0029] 4: Rail frame

[0030] 41: Side frame

[0031] 42: Belt

[0032] d1: First trigger

[0033] d2: Second trigger

[0034] d3: Third trigger

[0035] d4: Fourth trigger

[0036] d5: Fifth trigger

[0037] d6: Sixth trigger

[0038] L: Unit path Detailed Implementation

[0039] Please see Figure 3 This invention will be illustrated using a liquid material extrusion device as shown in the figure. The device has a moving mechanism 2 mounted on a machine platform 1. The moving mechanism 2 has an operating mechanism 3 capable of X, Y, and Z axial displacement. Below the operating mechanism 3 is a rail frame 4 for transporting the material to be extruded.

[0040] The moving mechanism 2 has two gantry-type frames 21 located on both sides, each frame 21 having a Y-axis slide rail 211; a crossbeam 22 is spanned between the two gantry-type frames 21, the crossbeam 22 having an X-axis slide rail 221; a fixed seat 23 is provided on the crossbeam 22, a rail seat 24 is provided on the fixed seat 23, a Z-axis slide rail 241 is provided on the rail seat 241, and a slide block 242 is provided on the slide rail 241, the slide block 242 being used to mount the operating mechanism 3;

[0041] The operating mechanism 3 is located on the slide 242 of the moving mechanism 2 and includes: a glue valve 31 and a rangefinder 32; the glue valve 31 is piezoelectric driven and applies liquid material by extruding liquid material droplets, and is equipped with a controller 33; the rangefinder 32 can measure distance using laser or infrared light.

[0042] The track frame 4 is located below two gantry-type support frames 21 along the X-axis. It has two side frames 41 that are spaced apart and parallel to each other. Each side frame 41 has a driveable belt 42 on its inner side facing each other. The belt 42 forms a conveying flow path for stopping or conveying the crop to be applied.

[0043] Please see Figure 3 , 4 In the liquid material application method of this embodiment of the invention, when using the adhesive valve 31 to coat the liquid material, for a known predetermined coating unit path L, the liquid material extrusion amount and the number of trigger signals of the controller 33 of the adhesive valve 31 during liquid material application are allocated according to the unit path L. In this embodiment, a variable liquid material extrusion point frequency method is adopted to perform remainder processing on the excess liquid material extrusion points. Among the multiple trigger signals of the controller 33 of the adhesive valve 31 in the unit path L, there are segments with the same trigger signal but different liquid material extrusion point numbers, as shown in the figure. Figure 4 Taking the unit path L shown as an example, in the initial stage of liquid material application, the number of liquid material extrusion application points is divided into three segments as the trigger signal of the controller 33 of the glue valve 31. Each trigger constitutes a segment of three-point liquid material extrusion, with the first trigger d1 and the second trigger d2... After the fifth trigger d5 forms a total of five trigger point segments, the sixth trigger d6, which is a point segment at the end of the unit path L, will trigger once. In this sixth trigger d6 point segment, the controller 33 will trigger once and only perform liquid material extrusion at one point to compensate for the remaining number of liquid material extrusion points due to errors on the travel path, thus fully achieving the liquid material performance of the predetermined unit path L.

[0044] In this embodiment of the invention, the controller 33 of the glue valve 31 is triggered to change the frequency of liquid material extrusion application points. When liquid material is extruded in a unit path L, the number of liquid material extrusion application points triggered by the controller 33 can be varied. In addition to the above-mentioned application method, the first trigger d1 can be used as one point and the second trigger d2 can be used as another point. The sixth trigger (d6) results in three points for each of the five triggers combined, or the first trigger (d1) and the second trigger (d2) each result in three points, the third trigger (d3) results in one point, and the fourth trigger (d4) results in one point. The sixth trigger d6 is three points, but when the liquid material is initially extruded, the controller 33 trigger is used once to extrude more points of liquid material, and the last controller 33 trigger is used to extrude fewer points of liquid material before the end of the unit path L. This can achieve the lowest number of controller 33 triggers throughout the process and improve the efficiency of liquid material application.

[0045] The liquid material application method and equipment of the present invention adopt a variable liquid material extrusion application point frequency mode when the controller 33 of the glue valve 31 is triggered, which can appropriately control the number of triggers of the controller 33 of the glue valve 31, so that the motor moving speed does not have to be reduced due to data processing, and the liquid material can be applied in a more optimized manner, thereby improving operating efficiency.

[0046] The above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification of the present invention shall still fall within the scope of the patent of the present invention.

Claims

1. A method for applying liquid materials, comprising: A liquid material application device is provided, comprising a moving mechanism on a machine platform, the moving mechanism being equipped with a glue valve for applying the liquid material; characterized in that: For a predetermined coating unit path, the liquid material extrusion amount and the number of controller trigger signals of the adhesive valve during liquid material application are allocated according to the unit path. A variable liquid material extrusion application point frequency method is adopted. During liquid material extrusion application in the unit path, the number of liquid material extrusion application points triggered by the controller trigger signal is as follows: when liquid material extrusion is initially performed, a larger number of liquid material extrusion points are performed with one controller trigger, and a smaller number of liquid material extrusion points are performed with the last controller trigger before the end of the unit path.

2. The liquid material application method as described in claim 1, wherein, The variable frequency of liquid material extrusion application points refers to the segment in the unit path where the controller trigger signal of the glue valve has the same trigger signal but different liquid material extrusion points during the liquid material extrusion application in the unit path.

3. The liquid material application method as described in claim 1, wherein, The initial liquid material extrusion is performed by triggering the controller once to perform liquid material extrusion at three points.

4. A liquid material application device, which can be used to perform the liquid material application method as described in any one of claims 1 to 3.

5. The liquid material application equipment as described in claim 4, wherein, The moving mechanism includes: two gantry-type frames located on both sides, each frame having a slide rail; a crossbeam spanning between the two gantry-type frames, the crossbeam having a slide rail; a fixed seat on the crossbeam, the fixed seat having a rail seat; a slide rail on the rail seat, the slide rail on the rail seat having a slide block, the slide block being used to mount an operating mechanism on which the rubber valve is mounted.

6. The liquid material application equipment as described in claim 5, wherein, The operating mechanism is equipped with a rangefinder.

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