TW552237B - Molding apparatus for mass production of duplications having thereon a micro-pattern - Google Patents

Abstract

The present invention is concerned with an improved molding apparatus for mass production of a variety of plastic or metal duplications having thereon a micro-pattern to the scale of micron or sub-micron. The present invention is suited for the applications such as micro-pitch CD disks manufacturing or bio-chips.

Description

552237 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to the manufacturing technology of mold cores with microstructures or replicated patterns and the mold structure thereof, especially a microstructure mold with high yield, high production efficiency and low cost Ren manufacturing technology and its mold structure. The advantages of the present invention are that it can greatly reduce the processing time and cost of mold cores, and overcome the limit of dimensional accuracy of mechanical precision machining. In the invention, the microstructure is transferred to the metal sheet by electro-forming in a yellow light lithography process: the metal sheet is then combined with the mold core ', which can be applied to a large number of reproducible productions, such as optical discs or biochips with microstructures. In addition, through the yellow light process, complex micro-patterns or multi-mode structures can be made on one stamper, and the actual production efficiency of one-mode multi-cavity is greatly improved. ^ Prior technology Generally, in order to be able to extend or change functions to produce new products in mass replication production, it is necessary to develop new molds, regardless of time or cost. The traditional molding technology is to gradually reduce the processed products (CNC, FMS, engraving machine, etc.) to miniaturization, and the fine structure below the traditional level. In order to respond to the existing mass production type replication machine. In the development and design of new molds, it will cause a certain degree of wave. The finished product shape is mechanically applied to the molds and mold cores. However, in recent years, mechanical processing has been unable to process micron and other future product miniaturization trends and effective use.

Page 10 552237 V. Description of the invention (2) and money wasted in re-developing the mold clock. The applicant is based on the shortcomings of this traditional machine and based on the years of laboratories engaged in manufacturing this type of products. It is proposed that the invention can have microstructure, related experience, and careful invention to reduce the production cost, and increase the production technology of the invention to the existing replica machine mold, using gold f and yield. The thin metal plate with ~ pattern is combined with the mold core. The drum-following technology will have a development model—a tool—a time—and a cost, and—which can achieve the purpose of saving by the present invention. & Summary of the invention of micro-structured products The production of precision itching-grade micro-encapsulation surgery techniques and molds will produce a large number of hair products 8 ^ · Processing. Solve the bottlenecks encountered. Traditional large size and precision, micro-junctions are usually machined (CNC, FMS products are quite difficult, mainly because the micro-structure product size range is transferred to gold metal and then the technology is combined, that is, a large number of copies can be copied in the mold cavity The practice can also show that this hair #copy type 棬 a mass production i machine mass production structure products κ ^ Limited to, wedge engraving machine, etc. ^ about. :) Processing tolerances ^ This combined with Huang Guangwei '溥 plate, and then The metal is finished to make the mold. The desired finished product. You Ming's superiority. Micro-junction, mold kernel, micron, difference film, thin sheet, last one

Page 11 552237 V. Description of the invention (3) The present invention abandons the general traditional machining and adopts the transfer mold mounting (Stamper Mounting) mold kernel, which can indeed transfer the microstructure pattern to the mold to produce the finished product. The invention can be widely applied to products with complex microstructures at present, such as light guide plates, micro-lens arrays, biological wafers, and the like. With lithography technology, the scope of application can be expanded to produce nano-grade products in the future. ---———---- 一 —___ _ __ _ In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, 'a preferred embodiment is given below, in conjunction with the accompanying drawings, A detailed description is as follows. Embodiment Please refer to FIG. 1. FIG. 1 is a schematic cross-sectional view of the metal bonding technology of the present invention. In the process of making mold cores, the most important thing is to consider the impact of future product molding and subsequent effects, so as not to affect the quality of the finished microstructure. Therefore, pressure must be applied to maintain the flatness of the mold surface. However, the general pressing method easily damages the surface microstructure of the metal sheet. As shown in the figure, the metal bonding technology used in the present invention is to first plate a thin metal plate 10, such as a nickel plate, and the surface of the mold core 12 with a copper metal layer 14 and then between two steel metal layers 14 Fill in the intermediate bonding layer 16 of indium (I η) or indium alloy, and heat to 20 ° C ~ 40 (TC, pressurize to 300 ~ 40 〇kg / cm2 (to

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V. Description of the invention (4) Magnetic force, mechanical force, etc.) The two metal layers 14 are adhered and fixed. The above access method is only one of the preferred embodiments of the present invention. Those skilled in the art may refer to the invention σ and may use other equivalent joining methods to achieve the same as the present invention ^ such as bonding with super strong glue, mechanical The method of locking, the present invention is not limited to the joining method of the metal sheet 10 and the mold core 12. Metal bonding has a strong bonding force, so this method D is generally recommended. In addition, the intermediate bonding layer 16 can also be heated by heating to separate the metal sheet 丨 〇 and the mold core ”to achieve the purpose of reuse. See also Figures 2 and 3, of which Figure 2 is a schematic diagram of the present invention using magnetic force to avoid microstructure damage, and Figure 3 is a schematic diagram of the present invention using a mechanical plate to fix the microstructure to avoid damage to the microstructure. To avoid damage to the microstructure, the present invention The following design is used: 1. Place a magnet 24 or other magnetic force source under the metal mold core 22 and suck the top metal sheet 20. Fix the metal sheet 20 at the correct position, as shown in ^^. 22 is fixed in the cavity 29 of a mold 28. An indium metal layer 26 is formed between the metal sheet 20 and the mold core 22. = · Mechanically fixed. As shown in FIG. 3, the metal mold core 2 2 is fixed In the mold cavity 29 of one ^ 28. Between the metal sheet 20 and the mold core 22 is an indium gold from 26. A mechanical platen 3 has a region other than the microstructure on the surface of the transfer film plate 20, such as In the surrounding area, apply pressure. Ία & Gold has a good adhesion to metal, and also has thermal conductivity. After bonding various metal sheets to the mold core, it will not be copied.

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Due to the reciprocating action of the machine, it may cause falling or displacement.

The invention combines micro-electromechanical technology and metal bonding technology, and changes the manufacturing method of molds and mold cores, and can produce products with micro and nano structures. Different from the conventional method of mechanically processing the mold core, but after the lithography process, a metal sheet with a microstructure is electroformed and fixed to the mold core by metal bonding. Finally, an injection machine, a hot press, a press, etc. Mass production of the above replication-type forming machines. The invention can not only eliminate the limit of mechanical processing, but also has a simple production method. It can produce microstructured products without changing the existing mold-strip j, and can produce highly complex microstructured finished products. Successfully produced a variety of microstructures in production, such as light guide plate (LGP), micr0-lens array, etc., and can achieve the transfer rate, high-automation production process. Its application field will be forming molds with clad metal structure, and the method of manufacturing technology of this mold kernel can produce microstructure mold kernel, especially for industrial replicating production technology, who need microstructure mold kernel, In addition to the production of microstructure mold cores, this method of mold core manufacturing technology can also develop diversified products due to the function of replacement mold cores. Please refer to FIG. 4. FIG. 4 is a schematic diagram of a multi-cavity application of the present invention. ^ The present invention uses a thin metal plate to adhere to the mold kernel. The method can be applied to the multi-cavity of the mold to show the superiority of the present invention. As shown in Figure 4, “reproducible machine 40, such as injection machine, hot press, die casting machine, etc.” includes an upper mold 42 and a lower mold 44.

Page 14 552237 V. Description of the invention (6) The mold cores 46 fixed with the same or different micro-structure metal sheets (or called transfer stencil staraper) are respectively placed in the corresponding mold cavities 49. Taking plastic injection molding as an example, the plastic is ejected from the plastic injection port (not shown) of the upper mold 42 through hot extrusion, flows through the flow channel 48 to the cavity 49, and then passes through the cold part system (not shown) in the lower mold 46. Cool forming. It should be emphasized that the present invention is not limited to the application in the field of plastic injection molding, metal molding, such as town alloy molding, or other reproducible products that can be transferred and pressed in a molten state and require a microstructure on it. Application of invention _. Please refer to FIG. 5 'FIG. 5 is a sound chart of the mold clamping of the upper and lower molds of the present invention. As shown in Figure 5, the mold clothes commonly used in the industry are mainly upright. The upper mold 52 will be closely combined with the lower mold 54 when in use. 2 of the mold cavity 5 9 provided. The plastic is injected into the mold cavity 59 through the ejection opening of the upper mold 52 through the hot pressing pressure through the direction indicated by the arrow. In addition, according to another preferred embodiment of the present invention, the upper mold may also be provided with a corresponding mold core, and a transfer template having a microstructure is also connected thereto. This allows the production of replicating products with microstructures on both sides of the process. 'For example, double-sided microstructures or biochips with microchannels. Please refer to FIG. 6, which shows a side view of another preferred embodiment of the present invention. The present invention can also use a single piece of transfer stencil 60 with a plurality of microstructure ^ case areas 6 丨 on it, so that the transfer stencil 60 can be directly bonded with the above-mentioned metal bonding method: mold 6 4 through a bonding layer 6 3 Without using mold kernels. Plastic can flow to the corresponding mold cavity through the flow channel 66 provided on the lower end surface of the upper mold 62. 552237 _ ^ _____ 5. Description of the invention (7) 67. In summary, the advantage of the present invention is that it can greatly save mold development time and costs. To produce a new product, simply replace the mold core in the cavity, <. That is to say, there is no need to change the mold design significantly, as long as the mold core is taken out and the mold core attached to the new graphic sheet is inserted, a different product can be produced. In this way, not only the life of the mold and the replicating machine can be extended, but also a lot of development costs and time can be saved. All the above advantages cannot be achieved by traditional mechanical processing, which shows that the present invention has fully complied with the statutory requirements of industrial availability, novelty, and progress as stipulated by the Patent Law. The application was filed in accordance with the Patent Law. The patent in this case was approved. < s ^ The above description is only a preferred embodiment of the present invention. All equal changes and modifications made within the scope shall fall within the scope of the invention patent.

Page 16 552237 Simple illustration of the diagram Simple illustration of the diagram The figure shows the damage of the facet structure. The avoidance of the avoidance technique. The attachment and suction force is magnetic gold. The book is clearly issued. The damage structure of the figure is slightly avoided. The Mingfa Book is a three-picture book. The four diagrams show that this is the five or six diagrams. -Picture view-I-mode application of the example shown by the side-by-side! Use I-synthetic application | with more points in the acupoint | mode-mode | down 3-one | on the Ming-I Explanation of symbols 10 Metal sheet 12 Mold core 14 Metal layer 16 Intermediate bonding layer 20 Metal sheet 22 Mold core 24 Magnet 26 Indium metal layer 28 Mold 29 Mold six 30 Mechanical platen 40 Reproducible machine 42 Upper mold 44 Lower mold 46 mold Ren 48 runner 49 mold cavity 50 mold 52 upper mold 54 lower mold 56 mold kernel 59 mold cavity

Page 17 552237 Brief description of the drawings 60 Transfer stencil 61 Microstructure pattern area 62 Upper mold 63 Bonding layer 64 Lower mold 66 Runner 67 Cavity 1 ^ 1 Page 18

Claims (1)

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