A manufacturing method and fixture for side printing of LTCC components

Abstract

The present invention proposes a manufacturing method and fixture of a LTCC component side printing fixture, which can process hundreds of components by side printing at one time, and has high printing precision and good printing film quality. The fixture uses a stainless steel sheet with a certain thickness and surface roughness as a substrate, and then uses a laser to open hundreds of rectangular grooves in the form of an array on the steel sheet, and then covers both sides of the steel sheet with soft silicone of a certain thickness and hardness as a protective layer, and finally presses to form a whole, and finally uses the laser again to open grooves again in the form of the same array, and finally obtains a high-precision side printing fixture.

Description

Technical Field

[0001] The invention belongs to the technical field of side printing fixtures, and in particular relates to a manufacturing method of a LTCC component side printing fixture and the fixture. Background Art

[0002] Side printing is a key process for LTCC components to achieve electrical connectivity. However, the size of components is very small, and there are many unit wafers in one wafer taping. Side printing one by one is extremely inefficient and cannot meet the requirements of mass production. If you directly purchase a professional side printing machine, the equipment investment will be huge, and if there is not a large enough market, it will not be economical.

[0003] The current fixtures used for side printing of LTCC components either have a small number of components to be processed at a time, or the fixtures themselves have complex structures, high costs, and low reproducibility.

[0004] The following related patents in the prior art:

[0005] Patent 1) A fixture for printing multiple small low-temperature co-fired ceramic substrates (invention patent, application number CN201510126851.5);

[0006] Patent 2) A device and method for synchronous side printing of four small-size LTCC chip circuits (invention patent, application number CN201310552504.X);

[0007] Patent 3) A ceramic substrate side printing method and printing device (invention patent, application number CN201210332571.6);

[0008] The fixture models provided by Patent 1) and Patent 2) have complex structures and are extremely expensive, and the number of components processed at a single time is extremely small, so they are only suitable for making a small number of component samples; the fixture structure provided by Patent 3) is much more streamlined, and the number of components processed at a single time has been greatly increased, but the metal frame of the fixture is still completed by machining, which is relatively expensive and has low reproducibility. Summary of the invention

[0009] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for manufacturing a LTCC component side printing fixture and a fixture, which can economically produce the LTCC component side printing fixture and has strong reproducibility.

[0010] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0011] The present invention provides a method for manufacturing a LTCC component side printing fixture, comprising the following steps:

[0012] The steel sheet with certain thickness and surface roughness is used as the substrate;

[0013] The limiting grooves are opened in the steel sheet in the form of an array;

[0014] The two sides of the steel sheet are covered with soft silicone of a certain thickness and hardness as a protective layer, and pressed together to form an integral splint;

[0015] The whole clamp is grooved again in the same array as the first time to obtain a side printing fixture.

[0016] Further, a stainless steel sheet with a certain thickness and surface roughness is used as a substrate, comprising:

[0017] According to the size of the LTCC components to be side-printed, select a stainless steel sheet with suitable thickness and surface roughness.

[0018] The effect of the above settings: The appropriate surface roughness can improve the bonding force between the stainless steel sheet and the soft silicone while ensuring that the surface of the fixture remains flat, thereby increasing the service life of the fixture.

[0019] Furthermore, for 1206 size components, a stainless steel sheet with a thickness of 0.2 mm and a surface roughness of Ra = 3.2 μm was selected;

[0020] For 0805 size components, select stainless steel sheets with a thickness of 0.1 mm and a surface roughness of Ra = 1.6 μm;

[0021] For 0603 size components, select stainless steel sheets with a thickness of 0.05mm and a surface roughness of Ra=0.8μm.

[0022] Furthermore, the limiting grooves are opened in the steel sheet in the form of an array, including:

[0023] Laser is used to open an array of limiting grooves on the stainless steel sheet. The limiting grooves are rectangular in shape, and the length and width of the grooves must be 10% larger than the length and thickness of the device.

[0024] Furthermore, in the blank area between the outer side of the outermost groove and the edge of the steel sheet, eight circular holes with a diameter of 3 mm are evenly opened along the edge by laser, and the center of the circular hole needs to be more than 15 mm away from the edge of the steel sheet.

[0025] The effect of the above settings: The role of the round hole is to ensure that the soft silicone adheres better to the steel sheet and improve the service life of the clamp.

[0026] Furthermore, a "cross" shaped groove is opened at the four corners of the blank area.

[0027] The effect of the above settings: used for alignment during subsequent printing.

[0028] Furthermore, soft silicone with a certain thickness and hardness is respectively covered on both sides of the steel sheet as a protective layer, and pressed together, including:

[0029] Use paper tape to wrap the four sides of the steel sheet.

[0030] Take a smooth metal plate and lay a piece of white paper soaked in oil on it;

[0031] The mass ratio of the hard phase and the adhesive phase of the soft silicone is adjusted to 2:3, so that the viscosity of the glue is controlled at 60-80 Pa·s for easy leveling. In addition, the Shore hardness after curing needs to be controlled at 40-50 HA to improve the wear resistance of the fixture and thus increase its service life.

[0032] Apply the prepared soft silicone to one side of the steel sheet, with the thickness of the glue just reaching the thickness of the paper tape, then turn it over and apply the glue on the other side as well.

[0033] Place the steel sheet coated with glue on a metal plate covered with white paper, then lay a piece of white paper soaked in oil on the steel sheet, and then press a smooth flat plate on it to ensure that the thickness of the glue is uniform, and then allow the colloid to cure for 12 hours.

[0034] The effect of the above settings: Spread a piece of white paper soaked in oil to facilitate the later gas discharge.

[0035] Furthermore, the thickness of the paper tape needs to be determined according to the size of the LTCC components to be side-printed;

[0036] For 1206 size components, the thickness of the paper tape is 0.6mm;

[0037] For 0805 size components, the thickness of the paper tape is 0.5mm;

[0038] For 0603 size components, the thickness of the paper tape is 0.3mm.

[0039] The effect of the above settings: The purpose of the paper tape is to control the overall thickness of the fixture.

[0040] Further, the whole splint is grooved again in the same array as the first time, including:

[0041] After curing, the steel sheet covered with glue is laser-grooved for the second time, and the center of each groove coincides with the center of the first groove on the steel sheet;

[0042] The size of the limit groove should be determined according to the size of the LTCC components to be side-printed;

[0043] The length and width of the slot size must be 1% smaller than the length and thickness of the device.

[0044] Furthermore, the method further comprises: cleaning the clamp after grooving again.

[0045] In a second aspect, the present invention provides a side printing fixture, wherein the fixture is manufactured by the method described in the first aspect.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The fixture of the present invention has a simple structure, the material used is inexpensive, the manufacturing process of the fixture itself is simple, the service life is long, and the fixture has strong replicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a front view of the clamp of the present invention;

[0049] Figure 2 It is a cross-sectional view of the clamp limiting groove of the present invention.

[0050] In the figure: 1. Limiting groove; 2. Alignment groove; 3. Reinforcement through hole; 4. Silicone gel; 5. Stainless steel sheet. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0052] In the description of this embodiment, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this embodiment and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this embodiment.

[0053] Embodiment 1:

[0054] This embodiment provides a method for manufacturing a LTCC component side printing fixture, comprising the following steps:

[0055] Step 1: According to the size of the LTCC components to be printed, select a stainless steel sheet with suitable thickness and surface roughness. The appropriate surface roughness can improve the bonding force between the stainless steel sheet and the soft silicone while ensuring that the surface of the fixture remains flat, thereby increasing the service life of the fixture. Generally, for 1206 size components, a stainless steel sheet with a thickness of 0.2mm and a surface roughness of Ra=3.2μm can be selected; for 0805 size components, a stainless steel sheet with a thickness of 0.1mm and a surface roughness of Ra=1.6μm can be selected; for 0603 size components, a stainless steel sheet with a thickness of 0.05mm and a surface roughness of Ra=0.8μm can be selected.

[0056] Step 2: Use laser to make an array of limit grooves on the stainless steel sheet. The limit grooves are rectangular in shape and their size depends on the size of the components. Generally, the length and width of the grooves need to be 10% larger than the length and thickness of the device. In addition, in the blank area between the outer side of the outermost groove and the edge of the steel sheet, use laser to evenly open 8 circular holes with a diameter of 3mm along the edge. The center of the circular hole needs to be more than 15mm away from the edge of the steel sheet. The function of the circular hole is to ensure that the soft silicone adheres better to the steel sheet and improve the service life of the fixture. In addition, at the four corners of the blank area, open a "cross" shaped groove for alignment during subsequent printing.

[0057] Step 3: Use paper tape to wrap the edges of the steel sheet. The thickness of the paper tape should be determined according to the size of the LTCC components to be printed. Generally, for 1206 size components, the thickness of the paper tape is 0.6mm; for 0805 size components, the thickness of the paper tape is 0.5mm; for 0603 size components, the thickness of the paper tape is 0.3mm. The purpose of the paper tape is to control the overall thickness of the fixture.

[0058] Step 4: Take a smooth metal plate and lay a piece of white paper soaked in soybean oil on it to facilitate the subsequent gas discharge.

[0059] Step 5: Adjust the ratio of the hard phase and the adhesive phase of the soft silicone to 2:3 (mass ratio) so that the viscosity of the glue is controlled at 60-80 Pa·s for easy leveling. In addition, the Shore hardness after curing needs to be controlled at 40-50 HA to improve the wear resistance of the fixture and thus increase its service life.

[0060] Step 6: Apply the prepared soft silicone to one side of the steel sheet. The thickness of the glue should just reach the thickness of the paper tape. Then turn it over and apply the glue on it as well.

[0061] Step 7: Place the steel sheet coated with glue on a metal plate covered with white paper, then lay a piece of white paper soaked in soybean oil on the steel sheet, and then press a smooth flat plate on it to ensure that the thickness of the glue is uniform. Finally, allow the colloid to cure for 12 hours.

[0062] Step 8: After curing, the steel sheet covered with glue is laser-grooved for the second time. The center of each groove coincides with the center of the first groove on the steel sheet. The size of the groove should be determined according to the size of the LTCC component to be printed. Generally, the length and width of the groove should be 1% smaller than the length and thickness of the device.

[0063] Step 9: Clean the fixture to complete the fixture production.

[0064] Embodiment 2:

[0065] The fixture generated by the method described in Example 1 is as follows Figure 1-2 As shown, the fixture can be used for side printing processing of 1206 size components. The total thickness of the fixture is 1.4mm and it can hold 196 components at a time.

[0066] The clamp is manufactured by the method described in the first embodiment, and is a stainless steel sheet 5 on which a limiting groove 1 and an alignment groove 2 are provided, and a reinforcement through hole 3 is provided at the edge.

[0067] Appropriate surface roughness can improve the bonding force between the stainless steel sheet 5 and the soft silicone 4 while ensuring that the surface of the fixture remains flat, thereby increasing the service life of the fixture. Generally, for 1206 size components, a stainless steel sheet with a thickness of 0.2mm and a surface roughness of Ra=3.2μm can be selected; for 0805 size components, a stainless steel sheet with a thickness of 0.1mm and a surface roughness of Ra=1.6μm can be selected; for 0603 size components, a stainless steel sheet with a thickness of 0.05mm and a surface roughness of Ra=0.8μm can be selected.

[0068] The shape of the limiting groove 1 is rectangular, and the size needs to be determined according to the size of the component. The length and width of the groove size need to be 10% larger than the length and thickness of the component.

[0069] In addition, in the blank area between the outer side of the outermost groove and the edge of the steel sheet, 8 circular holes with a diameter of 3 mm are evenly opened along the edge by laser. The center of the circular hole needs to be more than 15 mm away from the edge of the steel sheet. The role of the circular hole is to ensure that the soft silicone 4 is better attached to the steel sheet and to increase the service life of the clamp.

[0070] The fixed alignment is to open a "cross" shaped alignment groove 2 at the four corners of the blank area for alignment during subsequent printing.

[0071] like Figure 2As shown, it is a cross-sectional view of the limiting groove 1, and the limiting groove 1 is made of soft silicone 4.

[0072] The ratio of the hard phase and the adhesive phase of the soft silicone 4 is adjusted to 2:3 (mass ratio), so that the viscosity of the glue is controlled at 60-80 Pa·s for easy leveling, and the Shore hardness after curing needs to be controlled at 40-50 HA to improve the wear resistance of the fixture and thus increase its service life.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0077] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A method for manufacturing a side printing fixture for LTCC components, It is characterized in that The following steps are involved: The steel sheet with certain thickness and surface roughness is used as the substrate; Limiting grooves are opened in the steel sheet in the form of an array; The two sides of the steel sheet are covered with soft silicone of a certain thickness and hardness as a protective layer, and pressed together to form an integral splint; The whole clamp is grooved again in the same array as the first time to obtain a side printing fixture; The substrate is a steel sheet with a certain thickness and surface roughness, including: According to the size of the LTCC components to be printed, select a steel sheet with suitable thickness and surface roughness; For 1206 size components, select steel sheets with a thickness of 0.2 mm and a surface roughness of Ra = 3.2 μm; For 0805 size components, select steel sheets with a thickness of 0.1 mm and a surface roughness of Ra = 1.6 μm; For 0603 size components, select steel sheets with a thickness of 0.05mm and a surface roughness of Ra = 0.8μm; The limit grooves are opened in the form of an array on the steel sheet, including: Use laser to make array limit grooves on the steel sheet. The limit grooves are rectangular in shape, and the length and width of the grooves must be 10% larger than the length and thickness of the device. The method further comprises: In the blank area between the outer side of the outermost groove and the edge of the steel sheet, eight circular holes with a diameter of 3 mm are evenly opened along the edge using a laser. The center of the circular hole must be at least 15 mm away from the edge of the steel sheet. At the four corners of the blank area, open a "cross" shaped slot; The two sides of the steel sheet are covered with soft silicone of a certain thickness and hardness as a protective layer and pressed together, including: Use paper tape to wrap the four sides of the steel sheet. Take a smooth metal plate and lay a piece of white paper soaked in oil on it; Adjust the mass ratio of the hard phase and the adhesive phase of the soft silicone to 2:3, so that the viscosity of the glue is controlled at 60-80 Pa·s for easy leveling, and the Shore hardness after curing needs to be controlled at 40-50 HA; Apply the prepared soft silicone to one side of the steel sheet, with the thickness of the glue just reaching the thickness of the paper tape, then turn it over and apply the glue on the other side as well; Place the steel sheet coated with glue on a metal plate covered with white paper, then lay a piece of white paper soaked in oil on the steel sheet, and then press a smooth flat plate on it to ensure that the thickness of the glue is uniform, and then allow the glue to cure for 12 hours; The thickness of the paper tape should be determined according to the size of the LTCC components to be side-printed; For 1206 size components, the thickness of the paper tape is 0.6mm; For 0805 size components, the thickness of the paper tape is 0.5mm; For 0603 size components, the thickness of the paper tape is 0.3mm.

2. The method for manufacturing the LTCC component side printing fixture according to claim 1, It is characterized in that The entire plate is regrooved in the same pattern as the first time, including: After curing, the steel sheet covered with glue is laser-grooved for the second time, and the center of each groove coincides with the center of the first groove on the steel sheet; The size of the limit groove should be determined according to the size of the LTCC components to be side-printed; The length and width of the slot size must be 1% smaller than the length and thickness of the device.

3. The method for manufacturing the LTCC component side printing fixture according to claim 1, It is characterized in that The method further comprises: cleaning the clamp after the regrooving.

4. A side printing fixture, It is characterized in that The clamp is manufactured by the method according to any one of claims 1-3.

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