CN116347782A - Manufacturing method of carbon oil printing - Google Patents
Manufacturing method of carbon oil printing Download PDFInfo
- Publication number
- CN116347782A CN116347782A CN202310036904.9A CN202310036904A CN116347782A CN 116347782 A CN116347782 A CN 116347782A CN 202310036904 A CN202310036904 A CN 202310036904A CN 116347782 A CN116347782 A CN 116347782A
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- Prior art keywords
- carbon oil
- size
- pad
- printing
- design size
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000007639 printing Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229910000679 solder Inorganic materials 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052802 copper Inorganic materials 0.000 abstract description 19
- 239000010949 copper Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000007650 screen-printing Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 206010015866 Extravasation Diseases 0.000 description 1
- 101000590281 Homo sapiens 26S proteasome non-ATPase regulatory subunit 14 Proteins 0.000 description 1
- 101001114059 Homo sapiens Protein-arginine deiminase type-1 Proteins 0.000 description 1
- 102100023222 Protein-arginine deiminase type-1 Human genes 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000036251 extravasation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
- H05K3/1216—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing
- H05K3/1225—Screens or stencils; Holders therefor
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
The invention discloses a manufacturing method of carbon oil printing, which comprises the steps of obtaining the PAD design size of a carbon oil plate; obtaining a solder mask windowing design size according to the PAD design size; carrying out data compensation on the design size of the welding-resistant windowing to obtain the processing size of the welding-resistant windowing, wherein the data compensation mode is to enable the single-side size of the design size of the welding-resistant windowing to be smaller than the design size of the PAD, so that the edge of the PAD is covered by the welding-resistant ink layer after the welding-resistant windowing to form a lap joint structure; obtaining the design size of the carbon oil film; carrying out data compensation on the designed size of the carbon oil film to obtain the processed size of the carbon oil film, wherein the data compensation mode is that the single-side size of the designed size of the carbon oil film is larger than the designed size of the PAD, the carbon oil printing is filled with the solder resist to form a carbon oil finger after windowing, and the plane of the carbon oil finger is higher than the plane of the lap joint structure; the problems that the PAD base material is not oiled and the fingers of carbon oil are uneven and copper is exposed at the side edge can be effectively solved; the welding-resistant window is reduced, the carbon oil printing is increased, and the bonding structure is designed, so that the process difficulty is reduced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of carbon oil printing of circuit boards, in particular to a manufacturing method of carbon oil printing.
Background
The carbon oil has the characteristics of good conductivity, stability, corrosion resistance and the like, and can play roles in protection and conduction, so that the carbon oil is widely applied to key positions of a circuit board; however, in the process of printing carbon oil by using the paper substrate, the situation of shrinkage of a circuit and copper exposure due to carbon oil deviation is easy to occur, so that the subsequent use of the circuit board is not facilitated.
At present, a position needing to be printed with carbon oil on a circuit board is provided with a welding prevention window on a circuit copper surface, a layer of step is formed between printing ink and the copper surface, the welding prevention edge of the step is not easy to fall off oil when the carbon oil is printed, the pressure is increased to ensure that oil seepage is easy to occur when the carbon oil is discharged, copper exposure or oil seepage is caused when the carbon oil is not discharged, the reworking amount is increased, and the scrapping is increased. In the prior art, the welding-preventing window is manufactured to be tangent to the edge of the copper PAD and has no step, the size of the welding-preventing window is identical to the actual required size of the copper PAD, and the design size of the welding-preventing window is tangent to the edge of the copper PAD or slightly larger than the edge of the copper PAD, so that the quality of carbon oil printing can be improved, the step is reduced after carbon oil filling, and further, the condition that carbon oil seeps onto a welding-resisting ink layer is prevented; however, the problem that the copper PAD substrate cannot be covered completely easily still exists, and the design of directly enabling the copper PAD to be flush with the solder resist ink layer requires equipment manufacturing precision to be about 1mil, and common manufacturing equipment cannot be met accurately, so that more defects can be generated in industrial production; therefore, there is a need for a more elaborate method of preparing carbon oil printing.
Disclosure of Invention
In order to solve the following problems in the prior art: the problem that copper leakage and micro-short extravasation easily occur in carbon oil printing is solved firstly; the invention discloses a scheme for solving the problem; furthermore, the problems of high precision requirement and complicated process of the manufacturing process are required to be solved.
The invention discloses a manufacturing method of carbon oil printing,
providing a carbon oil plate and obtaining the PAD design size of the carbon oil plate;
obtaining a solder mask windowing design size according to the PAD design size;
carrying out data compensation on the design size of the solder mask opening to obtain the processing size of the solder mask opening, wherein the data compensation mode is that the single-side size of the design size of the solder mask opening is smaller than the PAD design size, so that the edge of the PAD is covered by the solder mask ink layer after the solder mask opening to form a lap joint structure;
obtaining the design size of the carbon oil film according to the PAD design size;
and carrying out data compensation on the designed size of the carbon oil film to obtain the processed size of the carbon oil film, wherein the data compensation mode is that the unilateral size of the designed size of the carbon oil film is larger than the PAD designed size, the carbon oil printing is filled with the solder resist to form a carbon oil finger after windowing, and the plane of the carbon oil finger is higher than the plane of the lap joint structure.
Preferably, the welding-resistant windowing design size is reduced by at least 0.1mm on one side compared with the PAD design size, so that the welding-resistant windowing machining size is obtained.
Preferably, the carbon oil film design size is increased by at least 0.2mm on one side compared with the PAD design size, so as to obtain the carbon oil film processing size.
Preferably, the thickness of the carbon oil is 0.8-1.6mil, and the resistance value of the carbon oil is less than or equal to 750 ohms.
Preferably, the carbon oil is baked after printing to form a carbon oil finger.
Preferably, the printing speed of the carbon oil is 1.5-1.8m/min, and the baking is carried out at 150 ℃ for 30min.
Preferably, an ink-coated knife is used in carbon oil printing, wherein the angle of a scraper of the ink-coated knife is 15-30 degrees, and the pressure of the scraper is 6-7kg/cm 2 。
The beneficial effects of the invention are as follows: the invention discloses a manufacturing method of carbon oil printing, which comprises the steps of providing a carbon oil plate and obtaining the PAD design size of the carbon oil plate; obtaining a solder mask windowing design size according to the PAD design size; carrying out data compensation on the design size of the welding-resistant windowing to obtain the processing size of the welding-resistant windowing, wherein the data compensation mode is to enable the single-side size of the design size of the welding-resistant windowing to be smaller than the design size of the PAD, so that the edge of the PAD is covered by the welding-resistant ink layer after the welding-resistant windowing to form a lap joint structure; obtaining the design size of the carbon oil film according to the PAD design size; carrying out data compensation on the designed size of the carbon oil film to obtain the processed size of the carbon oil film, wherein the data compensation mode is that the single-side size of the designed size of the carbon oil film is larger than the designed size of the PAD, the carbon oil printing is filled with the solder resist to form a carbon oil finger after windowing, and the plane of the carbon oil finger is higher than the plane of the lap joint structure; the problems that the PAD base material is not oiled and the fingers of carbon oil are uneven and copper is exposed at the side edge can be effectively solved; meanwhile, good quality is achieved by adopting the structure design of reducing the solder mask window, enlarging the carbon oil printing and overlapping the edges, meanwhile, the process difficulty is reduced, and the production efficiency is improved.
Drawings
FIG. 1 is a diagram of a circuit design architecture of the present invention;
FIG. 2 is a schematic view of a vertical cross-section of the structure of the present invention;
FIG. 3 is a diagram of a prior art process for preparing a physical object;
FIG. 4 is a diagram of a manufacturing method of the present invention.
Component symbol description:
1、PAD；
2. a solder resist ink layer;
3. carbon oil finger;
A. welding resistance windowing processing size;
B. the size of a carbon oil film technician;
C. PAD design dimensions.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to the accompanying drawings.
In the following description, details of selected examples are given to provide a more thorough understanding of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. It should be understood that the detailed description is intended to illustrate the invention, and is not intended to limit the invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.
The invention discloses a manufacturing method of carbon oil printing, please refer to fig. 1-4;
providing a carbon oil plate and obtaining the PAD design size of the carbon oil plate; the screen printing plate can be manufactured by adopting the conventional process means in the prior art, for example, a 51T screen gauze is added with 18um water film, when the water film is pasted, the screen printing plate is fully wetted by clear water, the water film is pasted to be flat and free of holes, and after the completion, the excessive water is extruded, and the coating is uniform;
obtaining a solder mask windowing design size according to the PAD design size; the PAD design size C is a standard size designed on a drawing, and parameters such as carbon-oil spacing, PAD spacing and the like are ensured, so that defects caused by equipment precision in the preparation process can be improved when data compensation is performed for the process; therefore, the scheme achieves good product effect through adjustment of the preparation process;
carrying out data compensation on the design size of the welding-resistant windowing to obtain the processing size A of the welding-resistant windowing, wherein the data compensation mode is to enable the single-side size of the design size of the welding-resistant windowing to be smaller than the PAD design size, so that the edge of the PAD1 is covered by the welding-resistant ink layer 2 after the welding-resistant windowing to form a lap joint structure; in the preparation process, in order to enable the solder mask windowing to achieve a preset effect, the prior art is designed by adopting a size larger than a line PAD, so that more than a preset amount can be filled after the carbon oil is printed, the carbon oil is inwards recessed after being printed, copper exposure is easy to occur at the contact position of the carbon oil and a solder mask ink layer, the cost is easy to increase if the ink amount is increased, after the ink amount is increased, the edges of the solder mask ink layer and the copper PAD are always cut flat or tangential, the carbon oil can be overflowed irregularly, and the overflow part is easy to leak after friction, so that the carbon oil finger is in a micro short circuit to cause the defect; the scheme is to reduce the design size of the solder mask window in a reverse way so that the edge positions of the solder mask ink layer and the copper PAD are adhered to each other to a certain extent, and the solder mask ink layer is lapped on the same PAD;
obtaining the design size of the carbon oil film according to the PAD design size;
carrying out data compensation on the designed size of the carbon oil film to obtain a processed size B of the carbon oil film, wherein the data compensation mode is that the unilateral size of the designed size of the carbon oil film is larger than the designed size of the PAD, the carbon oil printing is filled with the solder resist to form a carbon oil finger after windowing, and the plane of the carbon oil finger is higher than the plane of the lap joint structure; the carbon oil film design size is obtained according to the original PAD design size, but the processing size of the solder resist ink is obtained after the data compensation of the solder resist ink design size, so that in order to accept the lap joint structure, the connection stability and the smoothness and the excellence of ink printing are ensured, the data compensation of the carbon oil film design size is that a single side is larger than the PAD design size, and if the lap joint structure is not formed, the processing size of the carbon oil film is simply enlarged, and then the carbon oil film is easy to overflow and uneven; the thickness of the matched lap joint structure in the vertical direction is slightly increased, copper PAD can be completely filled, no overflow phenomenon occurs, and the whole process is bidirectionally adjusted, so that the machining allowance is large, and compared with the prior art, the excellent production of the carbon oil finger 3 can be realized without an ultrahigh-precision machining means; and the defects of uneven carbon oil fingers and abnormal copper exposure on the side surfaces are eliminated.
In this embodiment, the solder mask opening design size is reduced by at least 0.1mm on one side compared to the PAD design size to obtain the solder mask opening process size.
In this embodiment, the design size of the carbon oil film is increased by at least 0.2mm on one side compared with the PAD design size to obtain the processing size of the carbon oil film.
In this embodiment, the carbon oil thickness is 0.8-1.6mil and the carbon oil resistance is less than or equal to 750 ohms.
In this embodiment, the carbon oil post-printing bake forms a carbon oil finger. In the scheme, the forming can be realized only by printing and baking in sequence, and the vertical carbon oil silk screen printing is printed after the horizontal carbon oil silk screen printing baking adopted in the high-precision manufacturing process in the prior art is not needed, and the baking is performed once again; of course, the baking of the scheme is finished once based on the technical means, so that the shaping can be finished after one baking.
In this example, the carbon oil printing speed is 1.5-1.8m/min and the bake is 150 degrees celsius for 30 minutes.
Preferably, an ink-coated knife is used in carbon oil printing, the angle of the doctor blade of the ink-coated knife is 15-30 DEG, and the pressure of the doctor blade is 6-7kg/cm 2 。
Means of implementation
The preparation process of the carbon oil plate is to prepare the carbon oil plate by screen printing firstly, preparing a 51T screen gauze for screen printing and adding 18 mu m water film, fully wetting the screen plate by clear water when the water film is stuck, and sticking the water film to be flat and free of holes, removing excessive water after the completion, and uniformly coating without dirt; then stirring the carbon oil, placing the carbon oil in a refrigerator for refrigeration, removing the carbon oil before use, vibrating the carbon oil with an ink stirrer for more than 10 minutes, opening a tank, stirring uniformly, controlling the annual time between 250 and 300PS after stirring uniformly, and adding a diluent according to the annual time of the carbon oil; the screen plate is added after stirring uniformly again before printing, the carbon oil is required to be stored in a refrigerator in a sealing way after printing, the temperature is controlled to be 16-20 ℃, and the carbon oil is required to be thawed in advance for 4H when being reused; the carbon oil printing is carried out and the molding and cleaning are needed; then entering carbon oil printing, and compensating according to the data to obtain a welding-resistant windowing processing size and a carbon oil film processing size, wherein the carbon oil printing is produced by additionally arranging an ink-covered knife printer platform to prevent missing printing and poor printing, the printing speed of the carbon oil printing is adjusted to 1.5-1.8m/min, the angle of a scraper is 15-30 ℃, and the pressure of the scraper is 6.0-7.0kg/cm < 2 >; the printing alignment is required to be aligned and adjusted OK, the carbon oil PAD is required to be arranged in the middle of the carbon oil windowing, and the printing carbon oil is fully covered on the anti-welding windowing PAD to ensure that the carbon oil is moderate left and right; when carbon oil is printed, the screen plate is cleaned when the machine is stopped for more than 30min according to the reverse-sticking screen bottom of the 50PNL paper-absorbing screen printing film, the screen plate is cleaned up and down when the screen plate is cleaned, and after the screen plate is cleaned, the screen printing white paper is printed until the white paper surface is inspected to be completely free of carbon oil residues, the screen printing film is used for reverse-sticking the screen bottom, and then printing production is carried out; and the thickness of the carbon oil after printing is 0.8-1.6mil, and the resistance value of the carbon oil is inspected according to the production requirement; baking with a vertical oven at 150deg.C for 30min.
The invention has the technical effects that:
the problems that the PAD base material is not oiled and the fingers of carbon oil are uneven and copper is exposed at the side edge can be effectively solved; meanwhile, good quality is achieved by adopting the structure design of reducing the solder mask window, enlarging the carbon oil printing and overlapping the edges, meanwhile, the process difficulty is reduced, and the production efficiency is improved.
The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be thought by those skilled in the art should fall within the protection scope of the present invention.
Claims (7)
1. A method for manufacturing carbon oil printing is characterized in that,
providing a carbon oil plate and obtaining the PAD design size of the carbon oil plate;
obtaining a solder mask windowing design size according to the PAD design size;
carrying out data compensation on the design size of the solder mask opening to obtain the processing size of the solder mask opening, wherein the data compensation mode is that the single-side size of the design size of the solder mask opening is smaller than the PAD design size, so that the edge of the PAD is covered by the solder mask ink layer after the solder mask opening to form a lap joint structure;
obtaining the design size of the carbon oil film according to the PAD design size;
and carrying out data compensation on the designed size of the carbon oil film to obtain the processed size of the carbon oil film, wherein the data compensation mode is that the unilateral size of the designed size of the carbon oil film is larger than the PAD designed size, the carbon oil printing is filled with the solder resist to form a carbon oil finger after windowing, and the plane of the carbon oil finger is higher than the plane of the lap joint structure.
2. The method of claim 1, wherein the solder mask window design is reduced unilaterally by at least 0.1mm compared to the PAD design to provide the solder mask window process dimension.
3. The method for manufacturing carbon oil printing according to claim 1, wherein the carbon oil film design size is increased by at least 0.2mm on one side compared with the PAD design size to obtain the carbon oil film processing size.
4. The method for producing carbon oil print according to claim 1, wherein the thickness of the carbon oil is 0.8-1.6mil, and the resistance value of the carbon oil is less than or equal to 750 ohm.
5. The method of claim 1, wherein the carbon oil is baked after printing to form a carbon oil finger.
6. The method for manufacturing carbon oil printing according to claim 5, wherein the printing speed of the carbon oil is 1.5-1.8m/min, and the baking is carried out at 150 ℃ for 30min.
7. The method for producing carbon oil print according to claim 5, wherein an ink-coated knife is used in the carbon oil print, the doctor angle of the ink-coated knife is 15-30 DEG, and the doctor pressure is 6-7kg/cm 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310036904.9A CN116347782A (en) | 2023-01-10 | 2023-01-10 | Manufacturing method of carbon oil printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310036904.9A CN116347782A (en) | 2023-01-10 | 2023-01-10 | Manufacturing method of carbon oil printing |
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| CN116347782A true CN116347782A (en) | 2023-06-27 |
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ID=86888329
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| CN202310036904.9A Pending CN116347782A (en) | 2023-01-10 | 2023-01-10 | Manufacturing method of carbon oil printing |
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2023
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| US4801489A (en) * | 1986-03-13 | 1989-01-31 | Nintendo Co., Ltd. | Printed circuit board capable of preventing electromagnetic interference |
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