TWI733199B - Cutting mat, manufacturing method thereof and cutting machine including the same - Google Patents

Abstract

A manufacturing method of a cutting mat is provided. The manufacturing method of a cutting mat includes the following steps: (a) providing a rubber mat; (b) texturing the rubber mat; (c) sputtering a coating material on the textured rubber mat; and (d) baking the coated rubber mat at 130~150℃ f or 60~80 seconds, wherein the coating material includes polytetrafluoroethene, and the rubber mat is a silicone-free rubber mat.

Description

Cutting gasket, its preparation method and cutting jig containing the same

The present invention relates to a cutting gasket, a preparation method thereof, and a cutting jig including the same, and more specifically, to a cutting gasket with improved hydrophobicity, a preparation method thereof, and a cutting jig including the same.

Today's electronics-related industries, such as PCB, LED and semiconductor industries, often use cutting jigs composed of cutting pads made of rubber on an aluminum alloy platform in the cutting process. However, since water is sprayed to lower the temperature of the blade during the production process, dust will be generated after cutting, so water and dust will remain on the surface of the rubber cutting gasket of the conventional cutting jig when the entire cutting process is completed.

Since the surface of the rubber cutting gasket of the conventional cutting jig has poor hydrophobicity, there will be a problem of stuck dust during continuous use, which will cause residues (water and powder) on the cutting jig during the continuous production process. Chips) stick to the processed object, causing a certain percentage of the abnormal appearance of the processed object, and it is easy to cause overkill problems in which the inspection machine misjudges the good product as the bad product. In addition to the above-mentioned problems, the poor surface hydrophobicity of the rubber cutting gasket will also cause difficulty in cleaning by personnel and a long cleaning time, which directly and indirectly increases the manufacturing cost.

In view of the above-mentioned problems of the prior art, the purpose of the present invention is to provide a cutting gasket with improved hydrophobicity, a preparation method thereof, and a cutting jig containing the same.

According to one objective of the present invention, a method for preparing a cutting gasket is provided, which includes the following steps: (a) providing a rubber gasket; (b) a roughened rubber gasket; (c) spraying paint on the roughened rubber gasket On-chip; and (d) Bake the sprayed rubber gasket at a temperature of 130-150°C for 60-80 seconds, where the coating contains Teflon, and the rubber gasket is a non-silicone rubber gasket.

Preferably, the rubber gasket can be made of nitrile rubber.

Preferably, the step (c) and the step (d) may further include the step (e) of allowing the sprayed rubber gasket to stand for 60-100 minutes.

Preferably, the cycle of steps (c), (e) and (d) can be repeated more than 5 times.

Preferably, in step (c), the paint can be sprayed with a thickness of 2-5 μm each time.

Preferably, in step (c), the paint can be sprayed at an angle of 45° with the normal direction of the roughened rubber gasket.

Preferably, the coating may contain 60~70wt% Teflon.

Preferably, the step of roughening the rubber gasket includes grinding the surface of the rubber gasket with sandpaper of size ≧600.

According to another object of the present invention, a cutting pad made by the above method is provided.

According to another object of the present invention, a cutting jig is provided, which includes a cutting platform and the above-mentioned cutting pad.

Based on the above, the cutting gasket, its preparation method and the cutting jig including it according to the present invention can have one or more of the following advantages: (1) reduce the problem of dust and moisture remaining on the cutting jig; (2) Improve the problem of anti-sticking of the processed objects; (3) Reduce the frequency and time of cleaning the cutting jig; and (4) Reduce the probability that the inspection machine will misjudge a good product as a bad product.

10: Cutting gasket preparation method

20, 20’: Cutting gasket

21: Rubber gasket

23: Paint

30: Cutting platform

40: metal plate

100: cutting fixture

201: Roughened rubber gasket

203: Coating

301: first cutting groove

302: second cutting groove

303: Cutting unit

305: Adsorption hole

307: Adsorption Groove

411: Connecting hole

S101~S107: steps

DR1: First direction

DR2: Second direction

The embodiment of the present invention can be more easily understood from the following description by combining the drawings, in which: Figure 1 is a flow chart of a method for preparing a cutting gasket according to an exemplary embodiment of the present invention; Figure 2 is a flow chart based on the present invention. A schematic cross-sectional view of each stage in the method of preparing a cutting shim according to an exemplary embodiment of the present invention; Fig. 3 is a schematic plan view of a cutting jig including a cutting shim according to an exemplary embodiment of the present invention; Fig. 4 is A schematic plan view of the metal plate under the cutting jig according to an exemplary embodiment of the present invention; the part (a) of Figure 5 shows that the smooth nitrile rubber gasket without a coating formed thereon is actually placed on the cutting platform for testing Photographs of residual moisture, part (b) of Figure 5 is a photo of residual moisture after the cutting pad according to an exemplary embodiment of the present invention is actually placed on a cutting platform for testing; and Figure 6 is a comparison diagram of yields of products prepared using a smooth nitrile rubber gasket without a coating formed thereon and a cut gasket according to an exemplary embodiment of the present invention.

The present invention will be described more fully with reference to the drawings in which exemplary embodiments of the present invention are shown. As those with ordinary knowledge in the art will recognize, the embodiments of the present invention may be modified in form and details in various different ways without departing from the spirit or scope of the present disclosure. The drawings and description are illustrative rather than restrictive, and the same element symbols are used throughout the specification to denote the same elements.

Hereinafter, the present invention will be explained in detail with reference to Fig. 1 and Fig. 2. FIG. 1 is a flowchart of a method 10 for preparing a cutting gasket according to an exemplary embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of each stage in the method of manufacturing the cutting gasket 20 according to an exemplary embodiment of the present invention. As shown in Figure 1, the method 10 for preparing a cutting gasket according to an exemplary embodiment of the present invention includes a step S101 of providing a rubber gasket, a step S103 of roughening the rubber gasket, a step S105 of spraying paint, and baking the sprayed Step S107 of the rubber gasket.

Referring to part (a) and part (b) of FIG. 1 and FIG. 2, in step S101, the rubber gasket 21 may have a sheet-like structure with a flat surface. In the present invention, the rubber gasket is a non-silicone rubber gasket to prevent it from contaminating the semiconductor components during the cutting process for semiconductor components. The materials made of the non-silicone rubber gasket include, but are not limited to, natural rubber, Natural rubber, neoprene rubber, nitrile rubber, styrene butadiene rubber, brominated base rubber, isobutyl rubber, polysulfide rubber, chlorosulfonated polyethylene, butyl rubber, polyurethane rubber, polyacrylate rubber, fluorine-26 rubber , Cyclized rubber and butadiene rubber. In a preferred embodiment, the non-silicone rubber gasket is made of nitrile rubber.

In step S103, a roughening process is performed on the rubber gasket 21 provided in step S101, and the roughened rubber gasket 201 has the structure shown in part (b) of FIG. 2. In one embodiment Among them, the step of roughening the rubber gasket includes grinding the surface of the rubber gasket with sandpaper of number ≧600. When the roughening of the rubber gasket surface is performed with sandpaper of number <600, the rubber surface will be too rough, making it difficult for the paint sprayed on it in the subsequent steps to form a complete coating, resulting in the possibility of the paint in actual use. It will stick to the processed object. In one embodiment, the step of roughening the rubber gasket includes grinding the surface of the rubber gasket with 600 sandpaper, and then sequentially applying 1000 and 1200 sandpaper to the surface of the rubber gasket. In addition to the above-mentioned steps of roughening the rubber gasket with sandpaper, the roughening process of the present invention can be carried out by any other conventional suitable process, as long as the surface of the roughened rubber gasket is ground with 600 sandpaper. The surface roughness of the rubber gasket can be similar.

Referring to part (c) of FIG. 1 and FIG. 2, in step S105, the process of spraying the paint 23 on the roughened rubber gasket 201 is performed. In the present invention, the coating 23 contains 60~70wt% Teflon and 30~35wt% organic solvent. The Teflon can include Teflon PTFE, Teflon FEP, Teflon PFA, Teflon ETFE, and mixtures thereof. The organic solvent is not specifically limited, and it can be capable of making Teflon powder Any suitable organic solvent evenly distributed in it for the spraying process. In one embodiment, the paint 23 can be sprayed at an angle of 45° with the normal direction of the roughened rubber gasket 201. When the paint 23 is sprayed at an angle of 45° with the normal direction of the roughened rubber gasket 201 When spraying at an angle of, the coating 23 can be evenly coated on the surface of the roughened rubber gasket 201. In one embodiment, the paint 23 with a thickness of about 2-5 μm can be sprayed on the roughened rubber gasket 201 each time, and the number of spraying can be determined according to needs. When the coating 23 sprayed each time is too thick, the organic solvent in the coating 23 will become difficult to volatilize, which is not conducive to the formation of subsequent coatings.

Referring to part (d) and part (e) of FIG. 1 and FIG. 2, in step S107, the roughened rubber gasket 201 coated with the paint 23 is baked to form the final coating layer 203 and For the cut gasket 20 of the roughened rubber gasket 201, the baking temperature can be 130-150°C and the baking time can be 60-80 seconds. When the baking temperature exceeds 150°C, the roughened rubber gasket 201 may be denatured. When the baking time is less than 60 seconds or the baking temperature is lower than 130°C, the coating 23 may not be able to form the coating 203. When the baking time is greater than 80 seconds, the coating formed in the subsequent steps may be reversely adhered to the processed object during actual use.

According to an embodiment, step S105 and step S107 may further include a standing step, that is, before performing the baking process of step S107, it may further include standing for about 60-100 minutes of the semi-finished product obtained from step S105 The step is to make the organic solvent in the coating 23 volatilize before baking to optimize the effect of forming the coating 203. In one embodiment, the cycle including step S105, standing step, and step S107 may be repeated 5 times or more to form the coating layer 203 having a thickness of >10 μm. In an embodiment, the thickness of the coating 203 may be ≧25 μm .

Another object of the present invention is to provide a cutting gasket produced by the above-mentioned cutting gasket preparation method. Referring to part (e) of FIG. 2, the cutting gasket 20 of the present invention includes a coating 203 and a roughened rubber gasket 201.

Another object of the present invention is to provide a cutting jig 100 including the cutting pad as described above. FIG. 3 is a schematic plan view of a cutting jig 100 including a cutting pad 20' according to an exemplary embodiment of the present invention. Referring to Fig. 3, the cutting jig 100 of the present invention includes a cutting platform 30 and a cutting pad 20'. In an embodiment, the cutting jig 100 may include a cutting platform 30 and a Teflon coating. The cutting platform 30 can be made of metal materials, and examples of metal materials include but are not limited to For iron, stainless steel, aluminum and combinations thereof. As shown in Figure 3, the cutting platform 30 may include a central part with a cutting pattern and a peripheral part surrounding the central part. The cutting pad 20' or a Teflon coating may cover the entire central part and part of the cutting platform 30. The surrounding part. The cutting pattern may include a plurality of first cutting grooves 301 extending along a first direction DR1 and a plurality of second cutting grooves 302 extending along a second direction DR2 intersecting with the first direction DR1. The plurality of first cutting grooves 301 and the plurality of second cutting grooves 302 can be staggered to form a plurality of cutting units 303. The cutting pattern may further include a plurality of suction holes 305 for connecting a vacuum device, and each cutting unit 303 includes at least one suction hole 305, so as to be fixedly placed on the cutting platform 30 by suction and suction provided by an additional vacuum device. The upper cutting pad 20' and/or the processed object to be cut. In one embodiment, each cutting unit 303 may further include a suction groove 307. The suction groove 307 may have an L shape and a linear shape, and surround the cutting unit 303 without contacting each other, as shown in FIG. 3 . In an embodiment, the suction hole 305 may be located in the middle of the cutting unit 303 and/or in the suction groove 307, but the invention is not limited thereto.

Since the Teflon coating and the cutting pad of the present invention as described above cover the central part of the cutting pattern containing the adsorption holes 305, the cutting jig of the present invention having the above structure can be used for Teflon coating or cutting. The gasket has a smooth cutting surface and a smooth inner surface of the adsorption hole. With the smooth cutting surface and inner surface, the cutting jig of the present invention can minimize dust and moisture residue during the cutting and/or washing process. , To reduce the possibility of misjudgment caused by subsequent contamination of the processed material and uneven adsorption, and the possibility of blocking the adsorption holes.

In another embodiment, a metal plate may be further included under the cutting platform. FIG. 4 is a schematic plan view of the metal plate 40 under the cutting jig according to an exemplary embodiment of the present invention. The metal plate 40 may have a cutting pattern corresponding to the cutting platform 30 and a communication hole 411. As shown in FIG. 4, the communication hole 411 may be located around the cutting pattern to communicate with the suction hole 305, the first cutting groove 301, and the second cutting groove 302 as shown in FIG. In one embodiment, the metal plate 40 can also be formed with a Teflon coating and the cutting gasket of the present invention as described above to reduce dust and moisture residues in the cutting and/or washing process, and reduce subsequent Possibility of secondary contamination of processed objects

The following provides examples of the present invention and comparative examples to illustrate the advantages of the present invention in detail.

Example 1

Take a rubber gasket made of nitrile rubber and grind the surface of the rubber gasket with 600 grit sandpaper to form a roughened rubber gasket.

With a coating containing 60~70wt% Teflon, the roughened rubber gasket is sprayed at an angle of 45° with the normal direction of the surface of the roughened rubber gasket, and each spray is 5 μm . Spraying.

After the sprayed rubber gasket is allowed to stand for 60-100 minutes, it is baked at a temperature of about 150° C. for about 60 seconds, and the cycle including spraying, standing and baking is repeated 5 times to obtain a cut gasket 1.

Comparative example 1

Except that the baking temperature was adjusted to 120°C, a cut pad A was produced in the same manner as in Example 1.

Comparative example 2

Except that the baking time was adjusted to 90 seconds, the cut shim B was produced in the same manner as in Example 1.

Comparative example 3

Except that the baking time was adjusted to 90 seconds, the cut pad C was produced in the same manner as that described in Comparative Example 1.

Comparative example 4

Except for grinding the surface of the rubber gasket with No. 400 sandpaper, the cut gasket D was produced in the same manner as described in Example 1.

Comparative example 5

Except for grinding the surface of the rubber gasket with No. 400 sandpaper, the cut gasket E was produced in the same manner as that described in Comparative Example 1.

Comparative example 6

Except for grinding the surface of the rubber gasket with No. 400 sandpaper, the cut gasket F was produced in the same manner as that described in Comparative Example 2.

Comparative example 7

Except for grinding the surface of the rubber gasket with No. 400 sandpaper, the cut gasket G was produced in the same manner as that described in Comparative Example 3.

The preparation conditions of the cutting pads of the above-mentioned Example 1 and Comparative Examples 1-7 are listed in Table 1 below.

It can be seen from Table 1 above that in Comparative Examples 1-7, the paint cannot form a complete coating, that is, the cutting gaskets A to G do not contain a complete Teflon coating, so in actual use Although cutting the gaskets A~G can also reduce the water residue, it will cause the problem of paint anti-sticking.

Then, Example 1 and the smooth nitrile rubber gasket without coating formed thereon (indicated by cutting gasket 0 in Table 2) were actually placed on a cutting platform for testing. The test results obtained are shown in Table 2 below.

Part (a) of Figure 5 is a photo of the moisture remaining after the cutting gasket 0 is actually placed on the cutting platform for testing, and part (b) of Figure 5 is the water after the cutting gasket 1 is actually placed on the cutting platform for testing. For the remaining photos, part (a) of Fig. 6 is the yield rate of the product prepared by using the cutting shim 0 four times, and part (b) of Fig. 6 is the yield rate of the product prepared by using the cutting shim 1 for four times. Depend on It can be seen from Figure 5 and Table 2 that, compared to the smooth nitrile rubber gasket without coating formed thereon (ie cutting gasket 0), the cutting gasket 1 of the embodiment of the present invention can effectively improve the hydrophobicity of the cutting platform. Performance, thereby reducing dust residue, and improving cutting pad printing and foreign matter residue. Therefore, compared with the cutting shim 0, the use of the cutting shim 1 can reduce the cleaning frequency and cleaning time of the cutting shim, and it is less likely to cause the problem of the residue (water and powder) to stick to the workpiece. In turn, it can reduce the miscarriage problem of the inspection machine misjudge the good product as the bad product. Refer to Figure 6, it can be seen that using the cutting gasket 1 to prepare the product can increase the product yield by an average of 3%.

Next, the characteristics of the cutting gasket 1 are further tested, and it can be seen that the cutting gasket according to the exemplary embodiment of the present invention has the following characteristics: Corrosion resistance: can withstand the addition of molten alkali metals, fluorinated media and higher than 300 . ℃ All strong acids except sodium hydroxide (including fluoroantimonic acid, aqua regia), strong bases, strong oxidants, reducing agents and various organic solvents.

Weather resistance: It has the best aging life among plastics.

Self-lubricating: It has the smallest coefficient of friction among plastics and is an ideal oil-free lubricating material.

Surface non-stickiness: No known solid material can adhere to the surface, and it is a solid material with the smallest surface energy.

Non-toxic: It is physiologically inert, and has no adverse reactions as artificial blood vessels and organs implanted in the body for a long time.

Insulation: It can withstand 1500 volts high voltage, is not affected by the environment and frequency, the resistivity can reach 1018Ω.cm, the dielectric loss is small, and the breakdown voltage is high.

Non-combustibility: The oxygen limit index is below 90.

Oxidation resistance: resistant to corrosion by strong oxidants.

Acidity: Neutral.

Atmospheric aging resistance: radiation resistance and low permeability: long-term exposure to the atmosphere, the surface and performance remain unchanged.

It can be seen from the above that the cutting gasket manufactured according to the embodiment of the present invention has better hydrophobic properties, and has corrosion resistance, weather resistance, self-lubricity, surface non-stickiness, non-toxicity, insulation, non-combustibility, and oxidation resistance. The use of cutting jigs with cutting pads manufactured according to the embodiments of the present invention can reduce the problem of dust and moisture remaining on the cutting jigs, improve the problem of anti-sticking of the processed objects, and reduce The frequency and time of cleaning the cutting jigs and reduce the probability that the inspection machine will misjudge a good product as a bad product.

It should be understood that the embodiments described herein should be regarded as descriptive concepts rather than limiting usage. The description of the aspects or features of each embodiment should generally be regarded as applicable to similar aspects or features in other embodiments. Although the present invention has been described with reference to the drawings, those skilled in the art will understand that various changes in form and details of the present invention do not depart from the scope and spirit defined by the scope of the following patent applications.

10: Cutting gasket preparation method

S101~S107: steps

Claims (8)

A preparation method of a cutting gasket includes the following steps: (a) providing a rubber gasket; (b) roughening the rubber gasket, and grinding the surface of the rubber gasket with sandpaper of number ≧600; (c) ) Spray a paint on the roughened rubber gasket; and (d) Bake the sprayed rubber gasket at a temperature of 130~150℃ for 60~80 seconds, wherein the coating contains 60~70wt% iron Flon, and the rubber gasket is non-silicone rubber gasket. The method for preparing a cutting gasket according to claim 1, wherein the rubber gasket is made of nitrile rubber. The method for preparing a cut gasket according to claim 1, wherein between step (c) and step (d), it further comprises step (e) of standing the sprayed rubber gasket for 60-100 minutes. The method for preparing a cut gasket according to claim 3, wherein the cycle of steps (c), (e) and (d) is repeated more than 5 times. The method for preparing a cutting gasket according to claim 4, wherein in step (c), the coating is sprayed with a thickness of 2-5 μm each time. The method for preparing a cut gasket according to claim 1, wherein in step (c), the paint is sprayed at an angle of 45° with the normal direction of the roughened rubber gasket. A cutting shim, which is produced by the method for preparing a cutting shim according to any one of claim 1 to claim 6. A cutting jig, comprising: a cutting platform; and the cutting pad according to claim 7, placed on the cutting platform.

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