A glass fiber plate mobile phone back cover and a preparation method thereof

Abstract

The present application relates to the technical field of electronic product shell, in particular to a kind of glass fiber plate mobile phone back cover and preparation method thereof, including glass fiber plate layer, the shielding oil layer being arranged on the upper surface of the glass fiber plate layer, the ink layer being arranged on the upper surface of the shielding oil layer, the UV glue layer being arranged on the upper surface of the ink layer, and the release agent layer being arranged on the lower surface of the glass fiber plate layer, and the ink layer is at least provided three layers.The mobile phone back cover of the present application is made of glass fiber material, has the advantages of light and thin quality, high structural strength, and also has the physical texture, fashionable appearance, high aesthetic degree, greatly improves product appearance effect, and improves product competitiveness.

Description

Technical Field

[0001] This invention relates to the field of electronic product casing technology, specifically to a fiberglass mobile phone back cover and its preparation method. Background Technology

[0002] With the development of the times, smartphones have become increasingly important in people's lives, and the variety of mobile phones has also increased. The appearance of a phone is particularly important when making a purchase decision, as the material, craftsmanship, and color of the phone casing influence people's choices. In the production and processing of mobile phone back covers, methods include injection molding, high-pressure glass molding with an anti-explosion film, and high-pressure molding of sheet metal. While single-color and multi-color combinations are possible, the texture effects are basically limited to single-color and single-texture designs, resulting in limited design flexibility. Existing mobile phone back covers still struggle to achieve many realistic material textures (such as gauze or silk), limiting their design possibilities.

[0003] PMMA / PC composite board phone back covers are widely used because their plastic material properties do not affect phone signals. High surface hardness (i.e., a glass-like effect) can be achieved through surface coating processes, and the inner layer can achieve vibrant decorative effects through UV transfer printing, PVD, and screen printing. Currently, PMMA / PC composite board phone back covers commonly use 0.5mm or 0.64mm thicknesses. When the composite board thickness is below 0.5mm, the low modulus results in insufficient material rigidity and easy deformation; therefore, the minimum thickness is currently 0.5mm. With technological advancements and consumers' increasing demands for portable electronic products, there are requirements for lighter and thinner structural components such as back covers. Therefore, developing new materials that combine the strength and rigidity of metal with the decorative effects of sheet materials has become a hot topic. Fiber-reinforced composite materials, represented by epoxy fiberglass boards, possess specific strength and specific modulus comparable to metals. Currently, the main process for fiberglass board back covers involves first screen printing the base layer on the A-side of the fiberglass board, then performing a transfer process, followed by physical vapor deposition (PVD), then screen printing the intermediate layer, and finally transferring the outer texture layer onto the surface of the intermediate layer. This process can achieve a similar dazzling texture effect to composite boards by using fiberglass materials. However, in this process, on the one hand, the fiberglass texture is difficult to conceal, and on the other hand, because the process layer is directly exposed on the outer surface (A-side), its reliability is at great risk. The product is prone to falling off during use, thus affecting the overall appearance. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a fiberglass mobile phone back cover. The back cover is made of fiberglass material and has the advantages of being lightweight, thin, and having high structural strength. At the same time, it also has a physical feel, a stylish appearance, and high aesthetic appeal, which greatly improves the product's appearance and enhances its competitiveness.

[0005] Another objective of this invention is to provide a method for preparing fiberglass board mobile phone back covers. This method is simple, has low production costs, and reduces the need for PET or explosion-proof film materials. Compared to traditional processes using coating or printing, which require diluents, have low curing rates, and produce volatile compounds, this invention uses adhesives instead. The overall process is optimized, achieving a curing rate of nearly 100%, fundamentally solving the LVOC (low volatile organic compound) problem and meeting subsequent environmental protection requirements. Furthermore, the products produced using this method can achieve a hardness of 5H, improving the hardness of the mobile phone back cover. While traditional processes can achieve a thickness of 0.55mm, this method, based on the thinness of fiberglass board and the optimized process, can achieve a thickness of 0.35mm, saving 0.2mm of thickness, conserving space, increasing battery capacity, and improving overall battery capacity.

[0006] The objective of this invention is achieved through the following technical solution: a fiberglass mobile phone back cover, comprising a fiberglass layer, a masking oil layer disposed on the upper surface of the fiberglass layer, an ink layer disposed on the upper surface of the masking oil layer, a UV adhesive layer disposed on the upper surface of the ink layer, and a release oil layer disposed on the lower surface of the fiberglass layer, wherein the ink layer comprises at least three layers.

[0007] More preferably, the thickness of the fiberglass board layer is 0.3-0.45 mm, the thickness of the masking oil layer is 6-8 μm, the thickness of each ink layer is 6-8 μm, and the thickness of the UV adhesive layer is 9-14 μm.

[0008] Preferably, a logo printing layer is provided between the ink layer and the UV adhesive layer, and the thickness of the logo printing layer is 2-5μm.

[0009] Preferably, the surface of the UV adhesive layer has a texture or logo pattern.

[0010] Preferably, an inner texture layer, a PVD layer, and a medium oil printing layer are further provided between the ink layer and the UV adhesive layer. The inner texture layer is disposed on the upper surface of the ink layer, the PVD layer is disposed on the upper surface of the inner texture layer, the medium oil printing layer is disposed on the upper surface of the PVD layer, and the UV adhesive layer is disposed on the upper surface of the medium oil printing layer.

[0011] The mobile phone back cover of this invention is made of fiberglass material, which has the advantages of being lightweight, thin, and having high structural strength. It also has a physical feel, a stylish appearance, and high aesthetic appeal, which greatly improves the product's appearance and enhances its competitiveness.

[0012] This invention also provides a manufacturing process for a fiberglass mobile phone back cover, comprising the following steps:

[0013] S1. Select a suitable masking ink and print it on the front of the fiberglass board using a screen printing method. After printing, bake and cure it to form a masking layer, which is used to cover the internal battery and packaging frame, etc., to improve the overall appearance of the mobile phone.

[0014] S2. Select different inks according to the different color requirements of the mobile phone back cover, and use a screen to print the ink on the surface of the masking oil layer. After printing, bake and cure to form an ink layer for later use.

[0015] S3. Repeat step S2 multiple times to obtain a semi-finished product;

[0016] S4. The semi-finished product obtained in step S3 is preliminarily polished and shaped to reduce defects in subsequent processes and obtain the shaped product.

[0017] S5. Select the appropriate release oil according to the different color requirements of the mobile phone back cover, and print it on the reverse side of the fiberglass board of the shaped product through the screen. After printing, bake and cure to form a release oil layer for later use.

[0018] S6. Print the logo pattern on the surface of the ink layer of the product after it has been shaped in step S5. After printing, bake it to form the logo printing layer for later use.

[0019] S7. Select UV adhesive according to different product requirements, coat the UV adhesive layer on the surface of the logo printing layer, and place it in a UV device for curing to form a UV adhesive layer, thus obtaining the product for later use.

[0020] S8. The obtained product is punched using a die and machine tool, and holes are drilled using a laser machine to facilitate subsequent CNC machining for shape positioning. According to the actual needs of the product, it is cleaned with detergent and purified water to obtain the finished product.

[0021] More preferably, in step S2, the ink needs to be mixed with the curing agent and the diluent when printing the ink, and the ratio of the amount of ink, curing agent and diluent used when mixed is 0.8-1.2:0.001-0.003:4-8.

[0022] The fiberglass back cover for mobile phones in this invention is manufactured using the method described above. The resulting product is lightweight, thin, and structurally strong. This manufacturing method is simple, has low production costs, and reduces the need for PET or explosion-proof film materials. Compared to traditional processes like dip coating and dip coating printing, which require diluents, have low curing rates, and release volatile compounds, this invention uses adhesive instead. The overall process is optimized, achieving a near 100% curing rate, thus fundamentally solving the LVOC (low volatile organic compound) problem and meeting subsequent environmental protection requirements. Furthermore, the product produced using this method achieves a hardness of 5H, improving the rigidity of the phone back cover. While traditional processes can achieve a thickness of 0.55mm, this method, due to the thinness of the fiberglass material and the optimized process, can achieve a thickness of 0.35mm, saving 0.2mm of thickness, conserving space, increasing battery capacity, and allowing for greater battery capacity.

[0023] More preferably, in step S3, the baking temperature is 60-100℃ and the curing time is 20-40 min when the first repeat of step S2 is performed; the baking temperature is 60-100℃ and the curing time is 60-80 min when the second repeat of step S2 is performed.

[0024] Preferably, in step S1, the baking temperature is 60-100℃ and the curing time is 5-20min.

[0025] Preferably, in step S2, a screen with a tension of 10mm-20mm and a mesh size of 250-350 is used to print ink; in step S2, the baking temperature is 60-100℃ and the curing time is 5-20min.

[0026] Preferably, in step S5, the baking temperature is 60-100℃ and the curing time is 60-80min.

[0027] Preferably, in step S6, the baking temperature is 70-90℃ and the curing time is 40-80min.

[0028] Preferably, in step S7, the energy during curing is controlled at 1200±50 mJ / cm. 2 The light intensity is controlled at 2000±500mW / cm². 2 The pressing speed is 16±2%, the dispensing air pressure is 0.2±0.1kg / cn2, and the glue usage is controlled at 3±1g / pcs.

[0029] The beneficial effects of the present invention are as follows: The mobile phone back cover of the present invention is made of glass fiber material, which has the advantages of being lightweight and thin, having high structural strength, and also has a physical feel, a fashionable appearance, and high aesthetic appeal, which greatly improves the product's appearance and enhances its competitiveness.

[0030] This invention provides a simple and low-cost method for preparing fiberglass mobile phone back covers, reducing the need for PET or explosion-proof film materials. Compared to traditional processes using coating or printing, which require diluents, have low curing rates, and release volatile compounds, this invention uses adhesive instead. The overall process is optimized, achieving a near 100% curing rate, fundamentally solving the LVOC (low volatile organic compound) problem and meeting subsequent environmental protection requirements. Furthermore, the product produced using this method achieves a hardness of 5H, improving the hardness of the mobile phone back cover. While traditional processes can achieve a thickness of 0.55mm, this method, based on the thinness of fiberglass material and the optimized process, can achieve a thickness of 0.35mm, saving 0.2mm of thickness, conserving space, increasing battery capacity, and improving overall battery capacity. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the fiberglass board mobile phone back cover in Embodiment 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the fiberglass board mobile phone back cover in Embodiment 2 of the present invention;

[0033] Figure 3 This is a schematic diagram of the fiberglass board mobile phone back cover in Embodiment 3 of the present invention;

[0034] Figure 4 This is the first process flow diagram of the present invention;

[0035] Figure 5 This is the second process flow diagram of the present invention.

[0036] The attached diagram is labeled as follows: 1-release oil layer, 2-fiberglass board layer, 3-masking oil layer, 4-ink layer, 5-logo printing layer, 6-inner texture layer, 7-PVD layer, 8-media oil printing layer, 9-UV adhesive layer. Detailed Implementation

[0037] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-5 The present invention will be further described below, and the content mentioned in the embodiments is not intended to limit the present invention.

[0038] Example 1

[0039] A fiberglass mobile phone back cover includes a fiberglass layer 2, a masking oil layer 3 disposed on the upper surface of the fiberglass layer 2, an ink layer 4 disposed on the upper surface of the masking oil layer 3, a UV adhesive layer 9 disposed on the upper surface of the ink layer 4, and a release oil layer 1 disposed on the lower surface of the fiberglass layer 2, wherein the ink layer 4 is provided with at least three layers.

[0040] The fiberglass board layer 2 has a thickness of 0.3 mm, the masking oil layer 3 has a thickness of 6 μm, each ink layer 4 has a thickness of 6 μm, and the UV adhesive layer 9 has a thickness of 9 μm.

[0041] The surface of the UV adhesive layer 9 is provided with a texture or logo pattern.

[0042] The fiberglass mobile phone back cover is manufactured through the following steps:

[0043] S1. Select a suitable masking ink and print it on the front of the fiberglass board using a screen printing method. After printing, bake and cure it to form masking layer 3 for later use. The masking ink used is SK4 ink provided by Guangzhou Liancai Inkjet Co., Ltd.

[0044] S2. Select different inks according to the different color requirements of the mobile phone back cover, and use a screen to print the ink on the surface of the masking oil layer 3. After printing, bake and cure to form ink layer 4 for later use.

[0045] S3. Repeat step S2 multiple times to obtain a semi-finished product;

[0046] S4. The semi-finished product obtained in step S3 is preliminarily polished and shaped to obtain the shaped product.

[0047] S5. According to the different color requirements of the mobile phone back cover, select the appropriate release oil, print it on the reverse side of the fiberglass board of the shaped product through the screen, and bake and cure it after printing to form release oil layer 1 for later use.

[0048] S6. Print the logo pattern on the surface of the ink layer 4 of the product after processing in step S5. After printing, bake it to form the logo printing layer 5 for later use.

[0049] S7. According to different product requirements, select UV adhesive, coat the UV adhesive layer 9 on the surface of the logo printing layer 5, and place it in a UV device for curing to form UV adhesive layer 9, thus obtaining the product for later use.

[0050] S8. The obtained product is punched using a die and machine tool, drilled with a laser machine, and cleaned to obtain the finished product.

[0051] In step S2, the ink needs to be mixed with the curing agent and diluent when printing ink. The ratio of the amount of ink, curing agent and diluent used when mixed is 0.8:0.001:4.

[0052] In step S3, the baking temperature is 60℃ and the curing time is 40 min when repeating step S2 for the first time; the baking temperature is 60℃ and the curing time is 80 min when repeating step S2 for the second time.

[0053] In step S1, the baking temperature is 60℃ and the curing time is 20min.

[0054] In step S2, ink is printed using a 250-mesh screen with a tension of 10 mm; in step S2, the baking temperature is 60℃ and the curing time is 20 min.

[0055] In step S5, the baking temperature is 60℃ and the curing time is 80min.

[0056] In step S6, the baking temperature is 70℃ and the curing time is 80min.

[0057] In step S7, the curing energy is controlled at 1150 mJ / cm. 2 The light intensity is controlled at 1500mW / cm². 2 The pressing speed is 14%, the dispensing air pressure is 0.1 kg / cn2, and the glue usage is controlled at 2 g / pcs.

[0058] Example 2

[0059] A fiberglass mobile phone back cover includes a fiberglass layer 2, a masking oil layer 3 disposed on the upper surface of the fiberglass layer 2, an ink layer 4 disposed on the upper surface of the masking oil layer 3, a UV adhesive layer 9 disposed on the upper surface of the ink layer 4, and a release oil layer 1 disposed on the lower surface of the fiberglass layer 2, wherein the ink layer 4 is provided with at least three layers.

[0060] The fiberglass board layer 2 has a thickness of 0.35 mm, the masking oil layer 3 has a thickness of 7 μm, each ink layer 4 has a thickness of 7 μm, and the UV adhesive layer 9 has a thickness of 11 μm.

[0061] A logo printing layer 5 is also provided between the ink layer 4 and the UV adhesive layer 9, and the thickness of the logo printing layer 5 is 2-5μm.

[0062] The surface of the UV adhesive layer 9 is provided with a texture or logo pattern.

[0063] The fiberglass back cover for mobile phones is manufactured through the following steps:

[0064] S1. Select a suitable masking ink and print it on the front of the fiberglass board using a screen printing method. After printing, bake and cure it to form masking layer 3 for later use. The masking ink used is SK4 ink provided by Guangzhou Liancai Inkjet Co., Ltd.

[0065] S2. Select different inks according to the different color requirements of the mobile phone back cover, and use a screen to print the ink on the surface of the masking oil layer 3. After printing, bake and cure to form ink layer 4 for later use.

[0066] S3. Repeat step S2 multiple times to obtain a semi-finished product;

[0067] S4. The semi-finished product obtained in step S3 is preliminarily polished and shaped to obtain the shaped product.

[0068] S5. According to the different color requirements of the mobile phone back cover, select the appropriate release oil, print it on the reverse side of the fiberglass board of the shaped product through the screen, and bake and cure it after printing to form release oil layer 1 for later use.

[0069] S6. Print the logo pattern on the surface of the ink layer 4 of the product after processing in step S5. After printing, bake it to form the logo printing layer 5 for later use.

[0070] S7. According to different product requirements, select UV adhesive, coat the UV adhesive layer 9 on the surface of the logo printing layer 5, and place it in a UV device for curing to form UV adhesive layer 9, thus obtaining the product for later use.

[0071] S8. The obtained product is punched using a die and machine tool, drilled with a laser machine, and cleaned to obtain the finished product.

[0072] In step S2, the ink needs to be mixed with the curing agent and the diluent when printing ink. The ratio of the amount of ink, curing agent and diluent used when mixed is 1.0:0.002:6.

[0073] In step S3, the baking temperature is 80℃ and the curing time is 30 min when repeating step S2 for the first time; the baking temperature is 80℃ and the curing time is 70 min when repeating step S2 for the second time.

[0074] In step S1, the baking temperature is 80℃ and the curing time is 15min.

[0075] In step S2, ink is printed using a 300-mesh screen with a tension of 15 mm; in step S2, the baking temperature is 80℃ and the curing time is 15 min.

[0076] In step S5, the baking temperature is 80℃ and the curing time is 70min.

[0077] In step S6, the baking temperature is 80℃ and the curing time is 60min.

[0078] In step S7, the curing energy is controlled at 1200 mJ / cm. 2 The light intensity is controlled at 2000mW / cm². 2 The pressing speed is 16%, the dispensing air pressure is 0.2 kg / cn2, and the glue usage is controlled at 3 g / pcs.

[0079] Example 3

[0080] A fiberglass mobile phone back cover includes a fiberglass layer 2, a masking oil layer 3 disposed on the upper surface of the fiberglass layer 2, an ink layer 4 disposed on the upper surface of the masking oil layer 3, a UV adhesive layer 9 disposed on the upper surface of the ink layer 4, and a release oil layer 1 disposed on the lower surface of the fiberglass layer 2, wherein the ink layer 4 is provided with at least three layers.

[0081] The fiberglass board layer 2 has a thickness of 0.45 mm, the masking oil layer 3 has a thickness of 8 μm, each ink layer 4 has a thickness of 8 μm, and the UV adhesive layer 9 has a thickness of 14 μm.

[0082] The surface of the UV adhesive layer 9 is provided with a texture or logo pattern.

[0083] An inner texture layer 6, a PVD layer 7, and a medium oil printing layer 8 are further provided between the ink layer 4 and the UV adhesive layer 9. The inner texture layer 6 is disposed on the upper surface of the ink layer 4, the PVD layer 7 is disposed on the upper surface of the inner texture layer 6, the medium oil printing layer 8 is disposed on the upper surface of the PVD layer 7, and the UV adhesive layer 9 is disposed on the upper surface of the medium oil printing layer 8.

[0084] The fiberglass mobile phone back cover is manufactured through the following steps:

[0085] S1. Select a suitable masking ink and print it on the front of the fiberglass board using a screen printing method. After printing, bake and cure it to form masking layer 3 for later use. The masking ink used is SK4 ink provided by Guangzhou Liancai Inkjet Co., Ltd.

[0086] S2. Select different inks according to the different color requirements of the mobile phone back cover, and use a screen to print the ink on the surface of the masking oil layer 3. After printing, bake and cure to form ink layer 4 for later use.

[0087] S3. Repeat step S2 multiple times to obtain a semi-finished product;

[0088] S4. The semi-finished product obtained in step S3 is preliminarily polished and shaped to obtain the shaped product.

[0089] S5. According to the different color requirements of the mobile phone back cover, select the appropriate release oil, print it on the reverse side of the fiberglass board of the shaped product through the screen, and bake and cure it after printing to form release oil layer 1 for later use.

[0090] S6. Print the logo pattern on the surface of the ink layer 4 of the product after processing in step S5. After printing, bake it to form the logo printing layer 5 for later use.

[0091] S7. According to different product requirements, select UV adhesive, coat the UV adhesive layer 9 on the surface of the logo printing layer 5, and place it in a UV device for curing to form UV adhesive layer 9, thus obtaining the product for later use.

[0092] S8. The obtained product is punched using a die and machine tool, drilled with a laser machine, and cleaned to obtain the finished product.

[0093] In step S2, the ink needs to be mixed with the curing agent and diluent when printing ink. The ratio of the amount of ink, curing agent and diluent used when mixed is 1.2:0.003:8.

[0094] In step S3, the baking temperature is 100℃ and the curing time is 40 min when repeating step S2 for the first time; the baking temperature is 100℃ and the curing time is 60 min when repeating step S2 for the second time.

[0095] In step S1, the baking temperature is 100℃ and the curing time is 5 minutes.

[0096] In step S2, ink is printed using a 350-mesh screen with a tension of 20 mm; in step S2, the baking temperature is 100℃ and the curing time is 5 min.

[0097] In step S5, the baking temperature is 100℃ and the curing time is 60min.

[0098] In step S6, the baking temperature is 90℃ and the curing time is 40min.

[0099] In step S7, the curing energy is controlled at 1250 mJ / cm. 2 The light intensity is controlled at 2500mW / cm². 2 The pressing speed is 18%, the dispensing air pressure is 0.3 kg / cn2, and the glue usage is controlled at 4 g / pcs.

[0100] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A fiberglass board mobile phone back cover, characterized in that: It includes a fiberglass board layer, a masking oil layer disposed on the upper surface of the fiberglass board layer, an ink layer disposed on the upper surface of the masking oil layer, a UV adhesive layer disposed on the upper surface of the ink layer, and a release oil layer disposed on the lower surface of the fiberglass board layer, wherein the ink layer comprises at least three layers.

2. The fiberglass board mobile phone back cover according to claim 1, characterized in that: A logo printing layer is also provided between the ink layer and the UV adhesive layer.

3. The fiberglass board mobile phone back cover according to claim 1, characterized in that: The surface of the UV adhesive layer is decorated with textures or logo patterns.

4. A fiberglass board mobile phone back cover according to claim 1, characterized in that: An inner texture layer, a PVD layer, and a medium oil printing layer are further provided between the ink layer and the UV adhesive layer. The inner texture layer is disposed on the upper surface of the ink layer, the PVD layer is disposed on the upper surface of the inner texture layer, the medium oil printing layer is disposed on the upper surface of the PVD layer, and the UV adhesive layer is disposed on the upper surface of the medium oil printing layer.

5. A method for preparing a fiberglass mobile phone back cover as described in claim 1 or 2, characterized in that: The steps include the following: S1. Select a suitable masking ink and print it on the front of the fiberglass board using a screen printing method. After printing, bake and cure it to form a masking layer for later use. S2. Select different inks according to the different color requirements of the mobile phone back cover, and use a screen to print the ink on the surface of the masking oil layer. After printing, bake and cure to form an ink layer for later use. S3. Repeat step S2 multiple times to obtain a semi-finished product; S4. The semi-finished product obtained in step S3 is preliminarily polished and shaped to obtain the shaped product. S5. Select the appropriate release oil according to the different color requirements of the mobile phone back cover, and print it on the reverse side of the fiberglass board of the shaped product through the screen. After printing, bake and cure to form a release oil layer for later use. S6. Print the logo pattern on the surface of the ink layer of the product after it has been shaped in step S5. After printing, bake it to form the logo printing layer for later use. S7. Select UV adhesive according to different product requirements, coat the UV adhesive layer on the surface of the logo printing layer, and place it in a UV device for curing to form a UV adhesive layer, thus obtaining the product for later use. S8. The obtained product is punched using a die and machine tool, drilled with a laser machine, and cleaned to obtain the finished product.

6. The method for preparing a fiberglass mobile phone back cover according to claim 5, characterized in that: In step S1, the baking temperature is 60-100℃ and the curing time is 5-20min.

7. The method for preparing a fiberglass mobile phone back cover according to claim 5, characterized in that: In step S2, ink is printed using a screen with a tension of 10mm-20mm and a mesh size of 250-350. In step S2, the baking temperature is 60-100℃ and the curing time is 5-20min.

8. The method for preparing a fiberglass mobile phone back cover according to claim 5, characterized in that: In step S5, the baking temperature is 60-100℃ and the curing time is 60-80min.

9. The method for preparing a fiberglass board mobile phone back cover according to claim 5, characterized in that: In step S6, the baking temperature is 70-90℃ and the curing time is 40-80min.

10. The method for preparing a fiberglass mobile phone back cover according to claim 5, characterized in that: In step S7, the curing energy is controlled at 1200±50 mj / cm², the light intensity is controlled at 2000±500mW / cm², the pressing speed is 16±2%, the dispensing air pressure is 0.2±0.1kg / cn², and the glue usage is controlled at 3±1g / pcs.

Images