TWI831996B - Massive micro-dispensing method and device - Google Patents

Abstract

A massive micro-dispensing method, including: applying glue in the grooves of the glue-dip platform through a dispensing machine; scraping the glue in the grooves to avoid overflowing the glue-dip platform; and using an array of detectors to The needle is misaligned and penetrated into the groove multiple times, and each time the micro-texture structure at the end of the probe determines the amount of glue that sticks. In order to realize the top-opening method, a large-volume micro-dispensing device of the present invention includes: a glue-dipping platform, a scraper, a dispensing machine and a large-volume transfer probe module. The glue-dipping platform has a groove, and the massive transfer probe module configures a set of probes of the array. Among them, the glue allows micro-LEDs or QDs to stick to the end of the probe, and as the probe moves to a predetermined position, a single large-volume transfer operation can be easily completed.

Description

Massive micro-dispensing method and device

The present invention relates to dispensing technology for displays, in particular to a method of massive micro-dispensing and a device for realizing massive micro-dispensing using the method.

Today's displays have entered the high-tech field of being light, thin, short, and small. It mainly relies on the special photoelectric properties of some micro light-emitting diodes (Micro LED, hereinafter referred to as micro LED) or quantum dots (Quantum Dot, abbreviated as QD) to produce pure three primary color lights of red, green and blue (RGB). in the display industry.

Whether it is a micro-LED or QD, they all have a tiny size and are solidified on a substrate using conductive silver glue. A dispensing equipment is used to place conductive silver glue at a designated position on the substrate. After baking at a certain temperature, the conductive silver glue becomes solid, allowing micro LEDs or QDs to adhere to the surface of the substrate.

However, the current dispensing equipment is stuck in the single-point dispensing technology. Assuming that 10,000 micro-LEDs or QDs are adhered to the substrate, the dispensing equipment needs to perform a single-point dispensing action and operate continuously and uninterrupted 10,000 times; or, 10,000 dispensing equipment needs to perform a single-point dispensing operation at the same time. glue action.

Therefore, how to improve the shortcomings of traditional dispensing technology has become an urgent issue to be solved in the present invention.

In view of this, the inventor of this case proposed a massive micro-dispensing method. The main purpose is to use the paving method to obtain a uniform amount of glue with the micro-texture structure of the array during multiple dislocation bonding processes, helping Micro LED or QD completes mass transfer.

The present invention proposes a large-volume micro-dispensing device, whose main purpose is to realize the efficiency of the top-opening method to complete the large-volume transfer of micro-LEDs or QDs.

Based on the achievement of the above objectives, the massive micro-dispensing method of the present invention includes:

Gluing: Use a glue dispensing machine to apply glue to the grooves of the glue platform;

Smoothing: Smooth the glue in the groove to avoid overflowing the glue-stained platform; and

Sticking: The probes of the array are dislocated multiple times and penetrate into the groove. The micro-texture structure at the end of the probe determines the amount of glue sticking each time.

In this way, in the massive micro-dispensing method of the present invention, the glue-spreading platform spreads glue with a uniform thickness in the groove, allowing the probe to penetrate deeply into the groove multiple times to dip the glue-like substance. Because of the misalignment, the position where the probe is inserted into the groove is different every time, resulting in a micro-textured structure with a uniform amount of glue.

When the probe leaves the glue-dipping platform, the glue causes the micro LED or QD to stick to the end of the probe. As the probe moves to a predetermined position (such as carrying a substrate), a single large-volume transfer operation can be easily completed. .

In order to realize the performance of the top-opening method on large-volume transfer, the massive micro-dispensing device of the present invention includes: a glue-dip platform with a groove; a glue-dispensing machine to apply glue in the groove; and a scraper Smooth out the glue in the groove; and, a massive transfer probe module operates a set of probes of the array to penetrate deeply into the groove, and the end of the probe forms a micro-texture structure to determine the amount of glue stuck .

Wherein, the micro-texture structure is a ridge that raises the end of the probe. Alternatively, the microtextured structure is a dimple that is sunk into the tip of the probe.

In addition, the gel is conductive silver-tin. When the temperature of the probe changes, the degree to which the conductive silver-tin (ie the gel) adheres to the micro-texture structure will change accordingly.

In order to make the purpose, features and advantages of the present invention easy to understand, one or more preferred embodiments are described in detail below with reference to the attached drawings.

Figure 1 is a flow chart depicting the massive micro-dispensing method of the present invention, which goes through the following three procedures:

10 steps of glue application: Use a glue dispensing machine to apply the glue into the groove of the glue platform;

12 steps of paving: Smooth the glue in the groove to avoid overflowing the glue-stained platform; and

14 steps of adhesion: The probes of the array are dislocated multiple times and penetrated into the groove. Each time, the micro-texture structure at the end of the probe determines the amount of glue to be adhered.

As shown in Figures 2 to 4, in order to realize the efficiency of the top-opening method in terms of large-volume transfer, a large-volume micro-dispensing device of the present invention includes: a glue-dipping platform 20, a scraper 24, and a dispensing machine 30 With a Mass Transfer Probe Module 40. The adhesive platform 20 is provided with a groove 22 , and the mass transfer probe module 40 is configured with a set of probes 42 of the array.

In Figure 2, the glue dispensing machine 30 extrudes four strips of glue 32, and each strip of glue 32 is applied to the bottom surface of the groove 22 along the width direction of the glue platform 20 to complete the glue coating step.

In Figure 3, the scraper 24 slides through the groove 22 along the length direction of the glue platform 20, and spreads glue 32 with uniform thickness on the bottom surface of the groove 22 to avoid overflowing the glue platform 20, and completes the paving. Flat steps.

As shown in FIG. 4 , the mass transfer probe module 40 moves laterally (or horizontally), and the probes 42 are operated multiple times to penetrate into the groove 22 along the longitudinal (or vertical) direction. The position where the probe 42 penetrates into the groove 22 once is staggered from the position where it landed in the groove 22 last time. This ensures that the end of the probe 42 is soaked in approximately the same glue 32 to complete the adhesion step.

Figure 5 is a perspective view showing that the end 44 of the probe 42 forms a micro-texture structure 46A. In the figure, the micro-textured structure 46A is an annular groove, which sinks into the end 44 of the probe 42 and determines the amount of glue that sticks.

As for the embodiments of the dimpled state, there are also the micro-textured structure 46D in Figure 8 and the micro-textured structure 46E in Figure 9 .

Figure 6 is also a perspective view, showing that the micro-texture structure 46B is a ring-shaped ridge. The ridge bulges the end 44 of the probe 42 to determine the adhesion amount of the glue.

Examples that express the ridge state include the micro-texture structure 46C in Figure 7, the micro-texture structure 46F in Figure 10, the micro-texture structure 46G in Figure 11, and the micro-texture structure 46H in Figure 12.

Looking back at Figure 4, the gel 32 is conductive silver tin. When the temperature of the probe 42 (or the mass transfer probe module 40 ) changes, the extent to which the conductive silver tin (ie, the glue 32 ) adheres to the micro-texture structure will change accordingly.

The temperature change referred to here can change the temperature of the probe 42 through one of three propagation modes: heat conduction, heat convection, and heat radiation.

When the probe 42 leaves the glue-dipping platform, the glue 32 causes the micro LED or QD (not shown) to adhere to the probe 42 and move to a predetermined position (such as a loading substrate) to complete the transfer operation.

10: Glue 12: Pave 14: Sticky 20: Glue-dipping platform 22: Groove 24:Scraper 30:Glue dispensing machine 32:Gel 40: Mass transfer probe module 42:Probe 44:End 46A, 46B, 46C, 46D, 46E, 46F, 46G, 46H: micro-texture structure

Figure 1 depicts the process of the massive micro-dispensing method of the present invention. Figures 2 to 4 show the device of the present invention for realizing massive micro-dispensing. Figures 5 to 12 show the shape of the microtexture structure.

20: Glue-dipping platform

22: Groove

32:Gel

40: Mass transfer probe module

42:Probe

Claims (2)

A large-volume micro-dispensing device includes: a glue-dipping platform with a groove; a glue dispenser for applying a glue substance in the groove; and a scraper for smoothing the groove. The gel inside; and a massive transfer probe module for inserting an array of probes into the groove, and the end of each probe forms a micro-texture structure to determine the gel. The amount of adhesion of the object; wherein each probe can change the degree to which the glue adheres to the micro-texture structure by changing the temperature, wherein the micro-texture structure is raised on the end of each probe embossed. A large-volume micro-dispensing device includes: a glue-dipping platform with a groove; a glue dispenser for applying a glue substance in the groove; and a scraper for smoothing the groove. The gel inside; and a massive transfer probe module for inserting an array of probes into the groove, and the end of each probe forms a micro-texture structure to determine the gel. The amount of adhesion of the object; wherein each probe can change the degree to which the glue adheres to the micro-texture structure by changing the temperature, wherein the micro-texture structure is sunk into the recess of the end of each probe. Pattern.

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