CN111447747A - Flexible printed board shape manufacturing method - Google Patents
Flexible printed board shape manufacturing method Download PDFInfo
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- CN111447747A CN111447747A CN202010415395.7A CN202010415395A CN111447747A CN 111447747 A CN111447747 A CN 111447747A CN 202010415395 A CN202010415395 A CN 202010415395A CN 111447747 A CN111447747 A CN 111447747A
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- 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
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
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- 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
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0017—Etching of the substrate by chemical or physical means
- H05K3/0026—Etching of the substrate by chemical or physical means by laser ablation
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- 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
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0047—Drilling of holes
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- 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
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/005—Punching of holes
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Laminated Bodies (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The embodiment of the invention discloses a method for manufacturing the appearance of a flexible printed board, which comprises the following steps: designing a forming pattern of the flexible printed board, wherein the forming pattern comprises a punching position and a non-punching position, and the punching position and the non-punching position are distributed in a staggered manner to form the forming pattern; manufacturing an outer layer covering film of the flexible printed board: arranging through holes on the outer covering film; manufacturing the appearance of the flexible printed board: and attaching the outer layer covering film to a flexible printed board to be punched with the forming pattern, punching the flexible printed board according to the forming pattern, and removing punching waste materials to form the appearance of the flexible printed board. The embodiment of the invention adopts a matching structure design of non-punching positions without a cover film, and designs the punching groove to replace the punching seam, thereby forming a manufacturing process, avoiding the problems of extrusion, pulling, thermal expansion and the like of the flexible printed board during punching, and simultaneously solving the tearing problem of the flexible printed board when the components are welded and then the flexible printed board is pulled apart.
Description
Technical Field
The invention relates to the technical field of electronic manufacturing, in particular to a method for manufacturing the appearance of a flexible printed board.
Background
Flexible Printed Circuit (FPC) and flex-rigid Printed Circuit boards have been widely used in the fields of high-end consumer electronics, medical instruments, automobiles, and avionics, based on their flexibility and high reliability.
The flexible printed board used in the field of large-scale industrial equipment has larger size and more bonding pads, so the requirements on the appearance and the expansion and contraction of the flexible printed board are stricter, and a higher precision and an expansion and contraction control method are required during punching processing.
At present, a flexible printed board with a large size is manufactured in a seam punching mode, a plurality of small non-punching positions of the flexible printed board and an auxiliary area of the flexible printed board are reserved, when a component is welded subsequently, the auxiliary area can further serve as a supporting structure of the flexible printed board, and the welding support of a product is ensured, as shown in fig. 1.
And after the components are welded subsequently, breaking the connecting position, and taking the flexible printed board down from the auxiliary area of the flexible printed board to complete welding manufacture.
However, the shape manufacturing mode of the punched seam has the following problems:
the seam punching requires a thinner punching cutter, on one hand, if the punching times are too many, the edge of the punching cutter can be broken, and on the other hand, the punching cutter can not reach the theoretical width of the seam punching by 0mm no matter the thickness of the punching cutter, so that the punching cutter can extrude, pull, thermally expand and even tear the flexible printed board during and after punching.
Because the flexible printed board is not completely punched out by the product punching seam, but a tiny connecting position is reserved, when the cutter is punched and retreated, the connecting position is possibly broken by pulling the cutter, and the connection between the flexible printed board and the auxiliary area is influenced.
After the components are welded, when the flexible printed board is taken down, the connection position is tightly connected with the flexible printed board, so that the flexible printed board is easily torn when the connection position is broken, and the product is scrapped.
Disclosure of Invention
The embodiment of the invention provides a method for manufacturing the appearance of a flexible printed board, which is used for solving the problems of extrusion, pulling, thermal expansion and tearing generated when the appearance of the flexible printed board is punched.
The invention provides a method for manufacturing the appearance of a flexible printed board, which comprises the following steps:
designing a forming pattern of the flexible printed board: the flexible printed board forming method comprises designing punching positions and non-punching positions, wherein the punching positions are through groove bodies with certain width formed after punching, the non-punching positions are partitions distributed among the punching positions, the non-punching positions are connecting bridge bodies and are used for connecting a flexible printed board body area and a flexible printed board auxiliary area, and the punching positions and the non-punching positions are continuously distributed in a staggered mode to form the forming pattern;
manufacturing an outer layer covering film pattern of the flexible printed board: manufacturing a through hole on the outer layer covering film, wherein the position of the through hole is correspondingly overlapped with the position of the non-punching position, the center of the through hole is overlapped with the center of the non-punching position, and the aperture of the through hole is larger than the width of the connecting bridge body;
manufacturing the appearance of the flexible printed board: and attaching the outer layer covering film to a flexible printed board to be punched with the forming pattern, punching the flexible printed board according to the forming pattern, and removing punching waste materials to form the appearance of the flexible printed board.
According to the embodiment of the invention, the punching seam is replaced by the punching groove according to the shape graph of the flexible printed board, on one hand, the punching knife of the punching groove is generally a double-edged knife, the punching process is not easy to break, on the other hand, the punching through groove can enable the flexible printed board to effectively release material stress after the shape is punched, the product deformation caused by expansion and contraction extrusion is avoided, and the problem that the flexible printed board is pulled by a cutter when the cutter is withdrawn can not be generated in the punching through groove; the non-punching position is reserved during punching, the position of the non-punching position corresponding to the outer layer covering film layer is designed to be a through hole, and the outer layer covering film has high toughness, so that the design and the manufacture can effectively ensure that the flexible printed board cannot be torn due to excessive tearing of the outer layer covering film when the flexible printed board is taken down subsequently; the embodiment of the invention generally comprises two parts of design and manufacture, wherein the design comprises a design punching position, a design non-punching position and a design outer cover film through hole, the manufacture comprises the steps of firstly manufacturing the outer cover film through hole, then manufacturing an attached outer cover film, and punching the outer layer according to the appearance of the flexible printed board to form an integral and interrelated manufacturing process, thereby solving the problems of extrusion, pulling, thermal expansion and tearing generated when the appearance of the flexible printed board is punched.
As an optional mode, the number of the punching positions is more than or equal to 1, and the number of the non-punching positions is more than or equal to 1.
As an alternative, the punching position is a through slot pattern extending a certain distance to the auxiliary area along the contour of the body area.
As an optional mode, the width of the through groove body is 0.5 mm-0.8 mm.
As an optional mode, the diameter of the through hole formed in the outer layer covering film is 0.6mm to 0.8 mm.
As an optional mode, the connecting bridge body is rectangular, and the width dimension of the rectangle is 0.3 mm-0.6 mm.
As an optional mode, the connecting bridge body is in a trapezoid shape, the width of the upper bottom of the trapezoid is 0.2-0.4 mm, and the width of the lower bottom of the trapezoid is 0.5-0.8 mm.
Alternatively, the through hole is formed by punching or drilling or laser cutting.
As an alternative, the outer cover film is attached with a tolerance of ± 0.15 mm.
As an alternative, the punching of the flexible printed board adopts a 15-25 ton punching machine.
According to the embodiment of the invention, under the overall flow of designing the punching position, designing the non-punching position, designing the outer-layer cover film through hole, manufacturing the attached outer-layer cover film, and punching the outer layer according to the appearance of the flexible printed board, the number and the shape of the connecting positions are designed and manufactured, so that the reliability of effective connection between the flexible printed board and the auxiliary area is ensured, the width of the through groove, the width of the non-punching position and the diameter of the through hole are designed and manufactured, the operability and the reliability of the tearing of the connecting position of the non-punching position are ensured, the attaching precision and the punching mode of the outer-layer cover film are designed and manufactured, the precision range of the outer-layer cover film and the flexible printed board body can be ensured, and.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a seam punching effect according to the background art of the present invention;
fig. 2 is a schematic diagram illustrating through hole manufacturing and bonding of an outer cover film in a method for manufacturing a flexible printed board shape according to an embodiment of the present invention;
fig. 3 is a schematic view of a cross-sectional structure a-a of fig. 2 according to a method for manufacturing a flexible printed board profile according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a die-cut outline of a method for manufacturing an outline of a flexible printed board according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a section B-B of fig. 4 in a method for manufacturing a flexible printed board profile according to an embodiment of the present invention;
fig. 6 is a schematic view of a cross-sectional structure C-C of fig. 4 in a method for manufacturing a flexible printed board profile according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a design of a structure for attaching a non-punching position and an outer cover film in a method for manufacturing a flexible printed board shape according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a non-punching position and an outer cover film attaching structure of a flexible printed board outline manufacturing method according to an embodiment of the present invention after punching;
fig. 9 is a schematic view of another design of a non-punching position and outer cover film attaching structure of a method for manufacturing a flexible printed board outline according to an embodiment of the present invention;
fig. 10 is a schematic diagram of another non-punching position and outer cover film attaching structure of a flexible printed board outline manufacturing method according to an embodiment of the present invention after punching;
fig. 11 is a schematic diagram of a design forming pattern and a manufacturing outline flow of a method for manufacturing an outline of a flexible printed board according to an embodiment of the present invention.
Reference numerals:
10. a flexible printed board 11,Flexible printed board shape12, a flexible printed board body area, 13, a flexible printed board auxiliary area, 101, an outer layer covering film, 102, a flexible printed board layer, 20, a seam punching structure, 21, a seam punching, 22, a connecting position, 30, a through hole, 40, a flexible printed board forming pattern, 401, a punching position (through groove body), 402 and a non-punching position (connecting bridge)Body), 50, punch cutter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, which is a schematic view of a seam punching effect in the background art of the present invention, after seam punching is performed, a flexible printed board shape (11) and a flexible printed board auxiliary area (12) form a seam punching structure (20), wherein a punching position forms a seam punching (21), a non-punching position forms a connection position (22), and when a component is welded and then broken, the connection position (22) is broken, so that the flexible printed board shape (11) is torn off from the flexible printed board auxiliary area (12).
Referring to fig. 2 to 6, which are schematic diagrams of a design and manufacturing process of a method for manufacturing a flexible printed board according to an embodiment of the present invention;
the method comprises the following steps: designing a molding pattern (40) of a flexible printed board (10): the flexible printed board forming die comprises design die cutting positions (401) and non die cutting positions (402), wherein the die cutting positions (401) are through groove bodies with certain width formed after die cutting, the non die cutting positions (402) are partitions distributed among the die cutting positions, the non die cutting positions (402) are connecting bridge bodies and are connected with a flexible printed board body region (12) and a flexible printed board auxiliary region (13), and the die cutting positions (401) and the non die cutting positions (402) are distributed in a continuous staggered mode to form a forming pattern (40);
manufacturing an outer layer covering film (101) pattern of the flexible printed board (10): manufacturing a through hole (30) on the outer layer covering film (101), wherein the position of the through hole (30) is correspondingly overlapped with the position of the non-punching position (402), the circle center of the through hole (30) is overlapped with the center of the non-punching position (402), and the aperture of the through hole (30) is larger than the width of the connecting bridge body (402);
manufacturing flexible printed board appearance（11）: and attaching the outer layer covering film (101) to a flexible printed board (10) to be punched to form a forming pattern, punching the flexible printed board (10) according to the forming pattern (40), and removing punching waste to form the appearance (11) of the flexible printed board.
As shown in fig. 2, a schematic diagram of manufacturing and attaching a through hole (30) of an outer cover film (101) in a method for manufacturing an outline of a flexible printed board according to an embodiment of the present invention is shown; after the outer layer covering film (101) is used for manufacturing the through hole (30), the outer layer covering film is attached to the flexible printed board (10) in an accurate alignment mode.
FIG. 3 is a schematic diagram of a cross-sectional structure A-A of FIG. 2 according to an embodiment of the present invention; and forming a matched structure without the outer layer covering film (101) at the position of the through hole (30) of the outer layer covering film by the flexible printed board (10) after the outer layer covering film (101) is attached, so that a foundation is made for the next process.
Fig. 4 is a schematic diagram of a die-cut outline of a method for manufacturing an outline of a flexible printed board according to an embodiment of the present invention; and punching the outer shape of the flexible printed board (10) after the outer layer covering film (101) is attached to the flexible printed board to form a flexible printed board forming pattern (40), wherein the flexible printed board forming pattern comprises a punching position (401) and a non-punching position (402), and the non-punching position (402) is correspondingly overlapped with the through hole (30).
FIG. 5 is a schematic structural diagram of a cross-section B-B of FIG. 4 according to an embodiment of the present invention; FIG. 6 is a schematic view of the cross-sectional structure of FIG. 4 in a cross-sectional view of C-C according to an embodiment of the present invention; the position of the non-punching position (402) after the punching outline processing only exists in the flexible printed board (10) and does not exist in the outer covering film (101), so that the outer covering film (101) can not be adhered when the outer covering film is pulled apart subsequently.
Fig. 7 is a schematic view of a design of a structure where a non-punching position (402) and an outer cover film (101) are attached in a flexible printed board outline manufacturing method according to an embodiment of the present invention; the non-punching position (402) is a connecting bridge body, the connecting bridge body (402) is rectangular, the width dimension of the rectangular connecting bridge body is 0.3-0.6 mm, the non-punching position (402) overlaps the corresponding position of the outer cover film (101), a through hole (30) exists, the aperture of the through hole (30) is larger than the width dimension of the connecting bridge body, therefore, when the connecting bridge body is broken, the outer cover film (101) cannot be adhered to the non-punching position (402), and the flexible printed board is prevented from being broken when the connecting bridge body is broken.
As shown in fig. 8, which is a schematic diagram of a non-punching position (402) and an outer cover film (101) in a lamination structure of a flexible printed board outline manufacturing method provided by an embodiment of the present invention after punching, as shown in the figure, a through groove of the punching position (401) and a connecting bridge body of the non-punching position (402) are formed after punching, the outer cover film (101) covers a flexible printed board (10), and the connecting bridge body (402) does not have the outer cover film (101), that is, only the flexible printed board layer (102) is reserved at the connecting bridge body (402), and when a component is welded and torn, the problem that the flexible printed board is torn due to adhesion of the cover films does not exist.
Fig. 9 is a schematic view of a fitting structure of a non-punching position (402) and an outer cover film (101) in the method for manufacturing a flexible printed board outline according to the embodiment of the present invention; the non-punching position (402) is a trapezoid connecting bridge body, the width of the upper bottom of the trapezoid is 0.2-0.4 mm, the width of the lower bottom of the trapezoid is 0.5-0.8 mm, and a gap exists between the trapezoid and the through hole.
As shown in fig. 10, which is a schematic diagram of a non-punching position (402) and an outer cover film (101) in a lamination structure of a flexible printed board outline manufacturing method provided by an embodiment of the present invention after punching, as shown in the figure, a through groove of the punching position (401) and a connecting bridge body of the non-punching position (402) are formed after punching, the outer cover film (101) covers the flexible printed board (10), and the connecting bridge body (402) does not have the outer cover film (101), that is, only the flexible printed board layer (102) is reserved at the connecting bridge body (402), and when a component is soldered and then torn off, the problem that the cover film is adhered to tear the flexible printed board does not exist.
As an alternative mode, the number of the punching positions (401) is more than or equal to 1, and the number of the non-punching positions (402) is more than or equal to 1.
Alternatively, the punching sites (401) are a pattern of through slots (401) extending a distance along the contour of the body region to the auxiliary region.
As an optional mode, the width of the through groove (401) is 0.5 mm-0.8 mm.
As an optional mode, the diameter of the through hole (30) arranged on the outer covering film (101) is 0.6-0.8 mm.
Alternatively, the through-hole (30) is formed by punching or drilling or laser cutting.
Optionally, the outer cover film (101) is attached with a tolerance of ± 0.15 mm.
As an alternative mode, the punching flexible printed board (10) adopts a punching machine of 15 tons to 25 tons.
Fig. 11 is a schematic diagram illustrating a design forming pattern and a manufacturing outline flow of a method for manufacturing an outline of a flexible printed board according to an embodiment of the present invention; when a forming graph is designed, three links of designing a punching position (401), designing a non-punching position (402) and designing an outer-layer covering film through hole (30) are corresponding to each other and are matched with each other, and a logic control and alignment position design basis is made for subsequent processing and manufacturing; when the appearance is manufactured, the through holes (30) of the outer layer covering film (101) need to be manufactured firstly, then the outer layer covering film (101) is attached, the appearance is punched, and all links need to be carried out in sequence, so that the overall manufacturing effect is formed.
According to the embodiment of the invention, the punching seam is replaced by the punching groove according to the shape pattern of the flexible printed board (10), so that the punching knife breakage caused by punching seam and the restriction of the punching seam on the internal stress release after punching the flexible printed board (10) are effectively avoided, and the deformation problems of extrusion, thermal expansion and contraction and tearing of the flexible printed board (10) are avoided; based on the design of the notching, the design and manufacturing method that only the flexible printed board body (102) is reserved at the non-punching position (402) and the outer layer covering film (101) is not reserved is adopted, so that the problem that the flexible printed board body is torn when the flexible printed board is torn after being welded is effectively solved; the overall technology of the embodiment of the invention comprises design and manufacture, adopts flow design, forms an integral supporting flow which is not interchangeable and mutually corresponding in each process, realizes effective manufacture of the appearance of the flexible printed board, can improve the manufacture quality and the product reliability, and reduces the product rejection rate.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for manufacturing the appearance of a flexible printed board is characterized by comprising the following steps:
designing a forming pattern of the flexible printed board: the flexible printed board forming method comprises designing punching positions and non-punching positions, wherein the punching positions are through groove bodies with certain width formed after punching, the non-punching positions are partitions distributed among the punching positions, the non-punching positions are connecting bridge bodies and are used for connecting a flexible printed board body area and a flexible printed board auxiliary area, and the punching positions and the non-punching positions are continuously distributed in a staggered mode to form the forming pattern;
manufacturing an outer layer covering film pattern of the flexible printed board: manufacturing a through hole on the outer layer covering film, wherein the position of the through hole is correspondingly overlapped with the position of the non-punching position, the center of the through hole is overlapped with the center of the non-punching position, and the aperture of the through hole is larger than the width of the connecting bridge body;
manufacturing the appearance of the flexible printed board: and attaching the outer layer covering film to a flexible printed board to be punched with the forming pattern, punching the flexible printed board according to the forming pattern, and removing punching waste materials to form the appearance of the flexible printed board.
2. The method for manufacturing the appearance of the flexible printed board according to claim 1, wherein the number of the punching positions is greater than or equal to 1, and the number of the non-punching positions is greater than or equal to 1.
3. The method for manufacturing the appearance of the flexible printed board according to claim 1, wherein the punching position is a through groove pattern extending to the auxiliary region for a certain distance along the outline of the body region.
4. The method for manufacturing the appearance of the flexible printed board according to claim 1, wherein the width of the through slot is 0.5mm to 0.8 mm.
5. The method for manufacturing the outer shape of the flexible printed board according to claim 1, wherein the diameter of the through hole provided in the outer cover film is 0.6mm to 0.8 mm.
6. The method for manufacturing the external shape of the flexible printed board according to claim 1, wherein the connection bridge body is rectangular, and the width dimension of the rectangle is 0.3mm to 0.6 mm.
7. The method for manufacturing the appearance of the flexible printed board according to claim 1, wherein the connecting bridge body is trapezoidal, the width of the upper bottom of the trapezoid is 0.2mm to 0.4mm, and the width of the lower bottom of the trapezoid is 0.5mm to 0.8 mm.
8. The method for manufacturing the outer shape of the flexible printed board according to claim 1, wherein the through hole is manufactured by punching, drilling or laser cutting.
9. The method for manufacturing the outer shape of the flexible printed board according to claim 1, wherein the outer cover film is attached to the flexible printed board with a tolerance of ± 0.15 mm.
10. The method for manufacturing the appearance of the flexible printed board according to claim 1, wherein the die-cut flexible printed board is die-cut by a 15-25 ton press.
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| CN202010415395.7A CN111447747A (en) | 2020-05-15 | 2020-05-15 | Flexible printed board shape manufacturing method |
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| CN202010415395.7A CN111447747A (en) | 2020-05-15 | 2020-05-15 | Flexible printed board shape manufacturing method |
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| CN113411950A (en) * | 2021-05-11 | 2021-09-17 | 深圳市景旺电子股份有限公司 | Circuit board and manufacturing method thereof |
| CN115003009A (en) * | 2022-06-09 | 2022-09-02 | 博敏电子股份有限公司 | Method for improving board dividing burrs of flexible printed board and flexible printed board structure thereof |
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