TWI815736B - Method for testing instant hardness of thermal type protection film - Google Patents

Abstract

A method for testing the instant hardness of thermal type protection film, comprising: providing a baked screen printing substrate, the screen printing substrate is provided with a plurality of protection zones and a plurality of test zones, and a thermal type protection film is screen printed on the protection zones and the test zones; conveying the screen printing substrate to a hardness testing machine, and using a test probe of the hardness testing machine to test the hardness of the test zones, after the test probe is tested, the hardness test information is generated and transmitted; and the hardness testing machine judges whether the thermal type protection film on the screen printing substrate is completely solidified, and generates a test result information according to the hardness test information. Based on the hardness testing machine, the solidified situation of the thermal type protection film can be judged immediately according to the hardness test before production.

Description

Instantaneous test method for hardness of thermally cured protective adhesive

The invention relates to the field of testing, and in particular to a method for instant testing of the hardness of thermally cured protective glue.

A circuit is formed on the glass substrate. The substrate with the circuit is screen-printed with heat-curing protective glue, also known as peelable glue, to protect the circuit on the substrate before the LED bonding process. Usually, thermally cured protective adhesives are cured by baking in an oven. However, as the size of the glass substrate increases, uneven heating in the oven will become more obvious. Therefore, thermally cured protective adhesives are usually tested and inspected to avoid Due to the incomplete reaction of thermosetting protective glue, glue may fall off or residual glue may be produced in subsequent processes.

The traditional inspection method is to tear off the thermosetting protective glue and use Fourier-transform infrared spectroscopy (FTIR) to identify differences in material properties using the difference in vibration energy of functional groups to confirm whether the thermosetting protective glue is completely cured. However, , such inspection is time-consuming and has a great impact on the productivity of production.

The hardness of the cured thermosetting protective glue is directly related to the degree of thermosetting reaction of the thermosetting protective glue. In other words, the higher the hardness, the more complete the thermosetting reaction. Therefore, in the actual field, pencils of different hardnesses are usually tested for protective glue. If the hardness reaches a certain hardness or above, for example, the hardness of pencil H, and no indentation or scratches are visible to the naked eye, the reaction is considered complete. Although this method can quickly identify and solve the traditional problem of affecting production speed. However, since each operator applies different strengths, it is difficult to standardize the judgment criteria. Too small an application of force may lead to misjudgment of incompletely reacted thermosetting protective glue, while an excessive application of force may even destroy the thermosetting protection. Glue the circuit you want to protect. In addition, the production of pencil toner will pollute the cleanliness of the clean room.

In order to solve the above problems, in some embodiments, a method for instant testing of the hardness of thermally cured protective glue is provided including: preparing a baked screen printing substrate, with a plurality of protection zones and a plurality of test areas on the screen printing substrate, The protective area and the test area are screen-printed with heat-curing protective glue; the screen-printed substrate is transported to the hardness testing machine, and at least one test probe on the hardness testing machine is used to test the hardness of the test area. At least one test probe is testing Finally, a hardness test information is generated and output; and the hardness test machine determines whether the heat-curing protective glue on the screen printing substrate is completely cured based on the hardness test information, and generates test result information.

In some embodiments, the hardness testing machine provides different test loads when the test probe is tested. In more detail, in some embodiments, the load applied to the test probe is 20g and 100g.

In some embodiments, the hardness testing machine includes a plurality of test probes, and the test probes respectively correspond to different hardnesses. For example, in some embodiments, the hardness of the test probe corresponds to the hardness of 6B, 4B, 3B, HB, H, 2H, 4H, 6H, and 7H pencils, and the test probe is made of polymer, ceramic, or metal.

In some embodiments, the test areas are located on both sides of the screen printing substrate.

In some embodiments, the test area is located at the perimeter of the screen-printed substrate and surrounds the protected area.

In some embodiments, the test areas are located at four corners of the screen-printed substrate.

In some embodiments, the hardness testing machine further includes an optical lens to generate a post-test surface image, and the hardness testing machine generates test result information based on the post-test surface image and the hardness test information.

In some embodiments, the hardness testing machine includes a screen to present test result information.

As mentioned in the previous embodiment, after the screen printing substrate is baked, the hardness test is directly performed with a hardness testing machine, which can instantly determine whether the heat-curing protective glue is completely cured, thereby avoiding glue loss or damage in the subsequent process. Residual glue is produced. At the same time, it also avoids the problems of particles and dust, and can maintain the cleanliness of subsequent process machines and process environments.

It should be understood that, when an element is referred to as being "disposed on" another element, it can mean that the element is directly located on the other element, or that intervening elements may be present to connect the element to the other element through the intervening elements. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, it will be understood that there are no intervening elements present.

In addition, the terms “first”, “second” and “third” are only used to distinguish one element, component, region or section from another element, component, region, layer or section and do not indicate Its inevitable sequence. In addition, relative terms, such as "lower" and "upper," may be used herein to describe one element's relationship to another element, and it will be understood that these relative terms are intended to encompass differences in the orientation of the device in addition to the orientation illustrated in the figures. position. For example, if the device in one of the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. This only represents a relative orientation relationship, not an absolute orientation relationship.

Figure 1 is a flow chart of the instant test method for hardness of thermally cured protective adhesive. Figure 2 is a top view of the first embodiment of the screen printing substrate. Figure 3 is a partial side view of the first embodiment of the hardness testing machine. As shown in FIG. 1 , the instant hardness testing method S1 of the thermally cured protective glue includes: a preparation step S10 , a testing step S20 , and a result generating step S30 . Referring to Figure 2 at the same time, the preparation step S10 is to prepare the baked screen printing substrate 1. The screen printing substrate 1 has a plurality of protection zones 10 and a plurality of test zones 20. On the protection zones 10 and the test zone 20, the screen printing substrate 1 has Heat curing protective glue 30. Here, the position of the test area 20 is adjusted according to the circuit design of the screen printing substrate 1, but it is all set in the dummy area. In this embodiment, the test area 20 is located on both sides of the screen printing substrate 1 to protect Area 10 is located in the center of the screen printing substrate 1 .

Referring to Figure 3 at the same time, the test step S20 is to transport the screen printing substrate 1 to the hardness testing machine 100, for example, place it on the carrier 105, and perform a hardness test on the test area 20 with the test probe 110 on the hardness testing machine 100. For example, the hardness of the test probe 110 can be corresponding to the hardness of an H pencil, and a load of 100g is applied to pressurize and move the heat-curing protective glue 30 in the test area 20. After the test, the test probe 110 is simultaneously protected according to the tested heat-curing protection glue 30. The position of the glue 30 generates feedback, thereby generating hardness test information and outputting it. Here, the hardness testing machine 100 actually includes not only the carrier 105, the test probe 110 and other components, but also recording media and calculation programs for calculation and recording (not shown in the figure). These components or programs can be used in industrial applications. Computer, desktop computer, notebook computer to achieve.

In more detail, the test probe 110 is made of polymer, ceramic or metal, thereby avoiding the generation of dust and particles and maintaining the cleanliness of the machine and the overall process environment.

The result generating step S30 is for the hardness testing machine 100 to comprehensively determine whether the heat-curing protective glue 30 on the entire screen printing substrate 1 is completely cured based on the hardness test information and the hardness test information of multiple test areas 20, and generate test result information. , such as OK/NG. Further, the hardness testing machine 100 includes a screen 120, and the real-time hardness testing method of the thermal curing protective adhesive further includes a result display step S40, which presents the test result information on the screen 120 for on-site personnel to decide whether to transmit the screen printing substrate 1 to subsequent processes. process stage.

Further, in the test step S20, different loads can also be provided, for example, a load of 20g and 100g can be applied to the test probe 110 to perform a hardness test to confirm the hardness of the thermally cured protective glue 30 and provide the hardness testing machine 100 to calculate Test result information has more parameters for judgment.

Figure 4 is a top view of the second embodiment of the screen printing substrate. Figure 5 is a top view of the third embodiment of the screen printing substrate. As shown in Figures 4 and 5, and with reference to Figure 2, the test area 20 of the screen printing substrate 1 can be appropriately configured according to the position of the overall protection zone and the layout of the circuit. For example, as shown in Figure 4, the test area 20 is located at the periphery of the screen printing substrate 1 and surrounds the protection zone 10; and as shown in Figure 5, the test areas 20 are located at the four corners of the screen printing substrate 1. Usually, the screen printing substrate 1 scans the barcode of the screen printing substrate 1 to access the relative positions of the protection zone 10 and the test area 20 of the screen printing substrate 1. After the test step S20, the screen printing substrate 1 scans the barcode of the screen printing substrate 1 according to the thermal curing protective glue 30 on the multiple test areas 20. The hardness is calculated to determine whether the heat-curing protective glue 30 on the protective zone 10 is completely cured, and test result information is generated. This is only an example and not a limitation. In fact, the test area 20 is limited to the invalid area, and its arrangement position can be adjusted according to the actual circuit layout.

Figure 6 is a partial side view of the second embodiment of the hardness testing machine. Further, as shown in FIG. 6 , the hardness testing machine 100 may include a plurality of test probes 110 , for example, 110A, 110B... to 110I. For the sake of clarity, not all of them are shown in the figure. Multiple test probes 110 can be installed on the turntable 107 and can rotate and perform hardness testing alternately. The hardness of the test probe 110 can respectively correspond to the hardness of 6B, 4B, 3B, HB, H, 2H, 4H, 6H, and 7H pencils. Here, "softest" is used as the order of arrangement. The above is only an example, not a limitation. The actual hardness, quantity, arrangement, and assembly method can be adjusted according to the required specifications.

In addition, the test probe 110 is made of polymer, ceramic or metal to avoid the generation of powder. When the test probe 110 is pressurized and moved from soft to hard and if no indentation is produced, the harder test probe 110 is replaced until the highest hardness is reached. If traces or damage defects are produced, the corresponding hardness is recorded as the hardness of the test area 20 . In this way, the overall hardness distribution can be confirmed and relevant data can be fed back to adjust the relevant parameters of the baking process.

Figure 7 is a partial side view of the third embodiment of the hardness testing machine. As shown in FIG. 7 , the hardness testing machine 100 further includes an optical lens 130 , which, after the testing step S20 , further captures and generates a surface image of the tested test area 20 after the test. If the thermal curing protective glue 30 undergoes a thermal curing reaction and the internal cross-linking property is lower than 60%, a white mist-like phenomenon will be found. In addition, through the optical lens 130, it can also be found whether there are obvious micropores, cracks, etc. for further confirmation. Thermal curing protective glue has 30 degrees of thermal curing. The hardness testing machine 100 generates test result information based on the surface image and hardness testing information.

Furthermore, the hardness testing machine 100 can conduct artificial intelligence training through optical and hardness related data, and cooperate with artificial intelligence to make more rapid judgments and improve the accuracy of inspection.

In summary, after the screen printing substrate 1 is baked, the hardness test is directly performed with the hardness testing machine 100, which can instantly determine whether the heat-curing protective glue 30 is completely cured, thereby avoiding the occurrence of dropout in the subsequent process. Glue may produce residual glue, while also avoiding problems with particles and dust, and maintaining the cleanliness of subsequent processing machines and the process environment.

Although the technical content of the present invention has been disclosed above in the form of preferred embodiments, it is not intended to limit the present invention. Any slight changes and modifications made by anyone skilled in the art without departing from the spirit of the present invention should be covered by the present invention. Within the scope of the present invention, the protection scope of the present invention shall be subject to the scope of the appended patent application.

1: Screen printing substrate 10:Protected area 20:Test area 30: Heat curing protective glue 100: Hardness testing machine 105: Carrier platform 107:Turntable 110:Test probe 110A~110I: test probe 120:Screen 130: Optical lens S1: Instant test method for hardness of thermally cured protective adhesive S10: Preparatory steps S20: Test steps S30: Result generation steps S40: Result display steps

Figure 1 is a flow chart of the instant test method for hardness of thermally cured protective adhesive. Figure 2 is a top view of the first embodiment of the screen printing substrate. Figure 3 is a partial side view of the first embodiment of the hardness testing machine. Figure 4 is a top view of the second embodiment of the screen printing substrate. Figure 5 is a top view of the third embodiment of the screen printing substrate. Figure 6 is a partial side view of the second embodiment of the hardness testing machine. Figure 7 is a partial side view of the third embodiment of the hardness testing machine.

1: Screen printing substrate

10:Protected area

20:Test area

30: Heat curing protective glue

100: Hardness testing machine

105: Carrier platform

110:Test probe

120:Screen

Claims (10)

An instant hardness testing method for thermally cured protective adhesive, including: Prepare a baked screen-printing substrate, which has a plurality of protection zones and a plurality of test areas, and a heat-curing protective glue is screen-printed on the protection zones and the test areas; Transport the screen printing substrate to a hardness testing machine, use at least one test probe on the hardness testing machine to perform a hardness test on the test areas. After testing, the at least one test probe generates a hardness test information, and to output; and The hardness testing machine determines whether the heat-curing protective glue on the screen printing substrate is completely cured based on the hardness testing information, and generates test result information. The instant hardness testing method of heat-cured protective adhesive as described in claim 1, wherein the hardness testing machine provides different testing loads during at least one test of the testing probe. The method for instant testing of the hardness of thermally cured protective glue as described in claim 2, wherein the loads applied to the test probe are 20g and 100g. The instant hardness testing method of heat-cured protective adhesive as described in claim 1 or 2, wherein the hardness testing machine includes a plurality of test probes, and the test probes respectively correspond to different hardnesses. The instant test method for the hardness of heat-cured protective glue as described in request item 4, wherein the hardness of the test probes corresponds to the hardness of 6B, 4B, 3B, HB, H, 2H, 4H, 6H, and 7H pencils respectively, and the Some test probes are made of polymers, ceramics or metals. The instant hardness testing method of heat-cured protective adhesive as described in claim 1, wherein the test areas are located on both sides of the screen printing substrate. The method for instant testing of the hardness of heat-cured protective glue as described in claim 1, wherein the test areas are located at the periphery of the screen printing substrate and surround the protective areas. The instant hardness testing method of heat-cured protective adhesive as described in claim 1, wherein the test areas are located at four corners of the screen printing substrate. The instant hardness testing method of heat-cured protective adhesive as described in claim 1, wherein the hardness testing machine further includes an optical lens to generate a post-test surface image, and the hardness testing machine is based on the post-test surface image and the Hardness test information generates the test result information. The real-time hardness testing method of heat-cured protective adhesive as described in claim 1 or 9, wherein the hardness testing machine includes a screen to present the test result information.

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