CN112533356B - Circuit board with multipurpose fixing hole and preparation method thereof - Google Patents
Circuit board with multipurpose fixing hole and preparation method thereof Download PDFInfo
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- CN112533356B CN112533356B CN202011260980.0A CN202011260980A CN112533356B CN 112533356 B CN112533356 B CN 112533356B CN 202011260980 A CN202011260980 A CN 202011260980A CN 112533356 B CN112533356 B CN 112533356B
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- 238000005553 drilling Methods 0.000 claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 238000004080 punching Methods 0.000 claims description 8
- 206010066054 Dysmorphism Diseases 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 24
- 238000011161 development Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
-
- 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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0215—Grounding of printed circuits by connection to external grounding means
-
- 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
-
- 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
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/02—Details related to mechanical or acoustic processing, e.g. drilling, punching, cutting, using ultrasound
- H05K2203/0221—Perforating
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/10—Using electric, magnetic and electromagnetic fields; Using laser light
- H05K2203/107—Using laser light
Abstract
The invention provides a circuit board with a multipurpose fixing hole, which comprises: a circuit board body; the drilling round fixing hole is a round through hole special-shaped hole arranged on the circuit board body, is a blind hole formed in the top of the drilling round fixing hole along the axial direction, is communicated with the drilling round fixing hole, and can mark the position of the drilling round fixing hole; the invention provides a circuit board with a multipurpose fixing hole, wherein the circuit board is provided with the multipurpose fixing hole, has testing and fixing functions, reduces the number of the fixing holes, reduces dislocation offset, increases available space in the circuit board, and provides a preparation method of the circuit board with the multipurpose fixing hole, which can accurately control drilling precision and reduce errors.
Description
Technical Field
The invention relates to the technical field of circuit equipment, in particular to a circuit board with a multipurpose fixing hole and a preparation method thereof.
Background
Along with the continuous development of applications such as cloud data, AI, big data, the performance requirement to network server is higher and higher, powerful derives from the promotion of mainboard calculation storage, consequently, electronic product's multifunctionality development, along with cloud calculation, big data are popularized, performance requirement to server product is higher and higher, circuit board function and part test are more and more important, avoid appearing unusual and lead to the user can't use relevant application or state such as card machine, electronic product is towards the refinement, miniaturization development simultaneously, board area is littleer and more, the function is more and more, various locating holes are also than many, how to realize the most function in minimum space, it is the main aspect of present electronic product competition to put more functional modes. Meanwhile, the ICT \ FCT test difficulty of the PCB is continuously increased due to the improvement of complexity.
Circular fixed orifices error is great on the mainboard that present mainboard used when ICT \ FCT test, and puts the fixed orifices on the mainboard, also brings the challenge for the mainboard space, has following problem: the inside fixed orifices of board require more, and the hole occupies the area of board on the mainboard, leads to partial part to put the space restricted, leads to the test fixture skew to lead to the test error easily when fixed when 3 fixed orifices have the error, unable test, and unable maintenance and maintenance cost are higher, and maintainability is lower.
Disclosure of Invention
The invention provides a circuit board with a multi-purpose fixing hole, wherein the multi-purpose fixing hole is formed in the circuit board, so that the circuit board has the functions of testing and fixing, the number of the fixing holes is reduced, the offset of dislocation is reduced, and the available space in the circuit board is increased.
The invention also provides a preparation method of the circuit board with the multipurpose fixed hole, which can accurately control the drilling precision and reduce errors.
The technical scheme provided by the invention is as follows:
a circuit board having a multipurpose securing hole, comprising:
a circuit board body;
drilling a round fixing hole which is a round through hole arranged on the circuit board body;
the special-shaped hole is a blind hole formed in the top of the drilled circle fixing hole along the axial direction, is communicated with the drilled circle fixing hole, and can mark the position of the drilled circle fixing hole;
the top cap is annular and is located on the surface of the circuit board body, the top cap is located on the edge of the round drilling fixing hole, and the top cap is provided with a plurality of through holes and can be connected with a ground wire.
Preferably, the special-shaped blind hole is square, triangular or oval.
Preferably, the round fixing hole is a non-copper-deposition hole, the margin between the round fixing hole and the circuit board is greater than 1.8D, wherein D is the aperture of the round fixing hole, and the aperture of the fixing hole is 125mils or 159mils, wherein mil represents thousandth of an inch.
Preferably, the via holes are distributed on the top cap in a circumferential array mode, the inner wall of the via holes is plated with copper, and the diameter of each via hole is 10 mils.
Preferably, the dysmorphism hole is non-heavy copper hole, just dysmorphism hole width and length are 59mils, dysmorphism hole angle is 19.7mils, dysmorphism hole error is 3 mils.
Preferably, the depth of the profiled hole is 0.3H; wherein H is the thickness of the circuit board.
Preferably, the top cap is made of metal and plated with copper on the surface, and the diameter of the ring in the copper plating position is more than (M +78.74) mils; wherein M is the diameter of the fixing nut; the special-shaped hole edge is provided with a non-copper-plated distance area, and the distance between the non-copper-plated distance area and the special-shaped hole edge is 8 mils.
A preparation method of a circuit board with a multipurpose fixing hole comprises the following steps:
marking the drilling position of a circuit board body, and forming a through drilling round fixing hole at the drilling position by using a drilling device;
step two, forming a special-shaped hole at the top of the drilling round fixing hole by using a punching device;
forming a copper plating area on the surface of the top cap, and bonding the top cap to the edge of the round drilling fixing hole;
and fourthly, forming a through hole on the top cap by utilizing the punching device.
Preferably, the perforating device is a laser-beam drill or a drill blade.
Preferably, the diameter of the drill bit is 0.6-0.8mm, and the rotating speed is 600-700 rpm/min.
Advantageous effects
The invention provides a circuit board with a multi-purpose fixing hole, wherein the multi-purpose fixing hole is formed in the circuit board, so that the circuit board has the functions of testing and fixing, the number of the fixing holes is reduced, the offset of dislocation is reduced, and the available space in the circuit board is increased.
The invention also provides a preparation method of the circuit board with the multipurpose fixed hole, which can accurately control the drilling precision and reduce errors.
The invention also provides the size of the multipurpose fixing hole, and can ensure that the fixing hole has fixing and testing functions and simultaneously provides better mechanical property.
Drawings
Fig. 1 is a schematic structural diagram of a circuit board with a multi-purpose fixing hole according to the present invention.
Fig. 2 is a sectional view of the multipurpose fixing hole according to the present invention.
Fig. 3 is a schematic structural view of the multiple-top cap according to the present invention.
Fig. 4 is a flow chart of a method for manufacturing a circuit board with a multi-purpose fixing hole according to the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. 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 should be noted that in the description of the present invention, the terms "in", "upper", "lower", "lateral", "inner", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, based on the technical problem of the background art, the present invention provides a circuit board with a multipurpose fixing hole, comprising: circuit board body 110, drill round fixing hole 120, profile hole 130 and top cap 140.
The drilling round fixing hole 120 is a round through hole arranged on the circuit board body 110, preferably, the drilling round fixing hole 120 is a threaded hole which can form threaded fit with a bolt to fixedly mount the circuit board body 110, and the special-shaped hole 130 is a blind hole extending from the top of the drilling round fixing hole 120 along the axial direction to the bottom of the drilling round fixing hole 120 and communicated with the drilling round fixing hole 120, so that the position of the drilling round fixing hole can be identified and a guiding effect can be achieved; the top cap 140 is annular and is located on the surface of the circuit board body 110, the top cap 140 is located at the edge of the circular fixing hole 120, and the top cap has a plurality of through holes 141 for connecting to a ground wire.
When the multifunctional fixing hole is used, the circuit board body 110 is fixed on an ICT testing machine or an FCT testing machine through the multifunctional fixing hole, after testing is completed, the circuit board body 110 is fixedly installed through bolts, the multifunctional fixing hole is formed in the circuit board, testing and fixing functions are achieved, and the available area of the circuit board is increased.
In another embodiment, as shown in fig. 2, the shaped blind holes 130 are square, triangular or oval, and the blind holes mainly play a role in positioning and guiding. The special-shaped blind holes are added in the round-drilled fixing holes 110, wherein the round-drilled fixing holes 110 are firstly manufactured, then the special-shaped blind holes 130 are manufactured at the top of the round-drilled fixing holes to reduce offset errors, the round holes are drilled holes of screw holes, and the lower special-shaped holes are ICT/FCT. The ICT \ FCT is used during manufacturing and testing, is not used after being installed on a case, and is directly locked with the case by using a middle hole as a positioning hole of a screw hole.
In another embodiment, the round fixing hole 120 is a non-copper-deposition hole, and the edge distance between the round fixing hole 120 and the circuit board is greater than 1.8D, where D is the diameter of the round fixing hole, and the diameter of the fixing hole is 125mils or 159mils, where mil represents thousandth of an inch.
In another embodiment, the shaped hole 130 is a non-copper-sinking hole, and the width and length of the shaped hole 130 are both 59mils, the angle of the shaped hole 130 is 19.7mils, and the error of the shaped hole is ± 3 mils.
In another embodiment, the profile hole depth is 0.3H; wherein H is the thickness of the circuit board.
As shown in fig. 3, the top cap 140 is made of metal and plated with copper on the surface, and the diameter of the inner ring of the copper plated position is greater than (M +78.74) mils; wherein M is the diameter of the fixing nut; the special-shaped hole edge is provided with a non-copper-plated distance area, and the distance between the non-copper-plated distance area and the special-shaped hole edge is 8 mils.
In another embodiment, the vias 141 are distributed on the top cap 140 in a circular array, and the inner wall is plated with copper, the diameter of the via is 10mils, and the via on Pad, which is identified as a screw hole of a normal structure model, is connected to GND property, and EMC is more effectively connected to GND.
The implementation takes the working process of the circuit board with the multipurpose fixing hole as an example, and further explains the following steps:
the circuit board is connected with an ICT tester through a multipurpose fixing hole to realize typical connection, all elements on the circuit board 110 are detected, the open short circuit, the bad circuit, the missing of the elements, the wrong elements, the defects of the elements, the bad welding and the like of the circuit are checked, the positions of the defects can be clearly pointed out, a user can be effectively helped to ensure the quality of products and improve the overhauling efficiency of defective products, and after the overhauling is finished, the male ICT tester of the circuit board body 110 is dismounted;
the circuit board is connected with an FCT testing machine through a multipurpose fixing hole, and the circuit board of a target product is subjected to functional testing through power-on simulation, so that the following testing parameters can be obtained: voltage, current, power, frequency, emulation etc. and the tool test speed of full automatic control mode is very fast and test data is accurate. The unit to be tested on the circuit board is used as a functional body, an input signal is provided for the unit to be tested, and the signal is detected according to the design requirement of the functional body. And the automation degree of detection is improved by an advanced and flexible scheme. The method greatly shortens the fault finding time, is the best method for quickly repairing and finding faults, the circuit board is detached after the test is finished, is not used after being installed on a case, and is directly locked with the case by using the middle hole as a positioning hole of the screw hole.
The invention also provides a preparation method of the circuit board with the multipurpose fixing hole, which comprises the following steps:
step S110, marking the drilling position of the circuit board body 110, and forming a through drilling round fixing hole 120 at the drilling position by using a drilling device;
step S120, forming a special-shaped hole 130 at the top of the round drilling fixing hole 120 by using a punching device;
step S130, forming a copper plating area on the surface of the top cap 140, and bonding the top cap 140 to the edge of the round drilling fixing hole 120;
step S140, forming a via hole 141 on the top cap 140 by using a punching device.
Preferably, the perforating device is a laser perforating machine or a drill, the diameter of the drill is 0.6-0.8mm, and the rotating speed is 600-700 rpm/min.
The invention provides a preparation method of a circuit board with a multi-purpose fixed hole, which can accurately control the drilling precision and reduce errors.
As shown in table 1, in order to further verify and test the mechanical properties of the drilled hole, a 40G 11ms square wave is adopted for impact, the gravity is downward, the impact wave is applied to the hole position of the main board fixing screw, and the maximum torque force which can be borne by the multi-purpose fixing hole manufactured by the manufacturing method provided by the invention is detected.
TABLE 1 torsion experiment result table
Wherein, brass, low carbon steel and stainless steel are fixing bolt materials, and the maximum torsion value born by the fixing hole is designed according to fixing bolts made of different materials.
The invention provides a circuit board with a multi-purpose fixing hole, wherein the multi-purpose fixing hole is formed in the circuit board, so that the circuit board has the functions of testing and fixing, the number of the fixing holes is reduced, the offset of dislocation is reduced, and the available space in the circuit board is increased. The preparation method of the circuit board with the multipurpose fixing hole is further provided, the drilling precision can be accurately controlled, and errors are reduced. The invention also provides the size of the multipurpose fixing hole, and can ensure that the fixing hole has fixing and testing functions and simultaneously provides better mechanical property.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (6)
1. A circuit board having a multi-purpose fixing hole, comprising:
a circuit board body;
drilling a round fixing hole which is a round through hole arranged on the circuit board body;
the special-shaped hole is a blind hole formed in the top of the drilled circle fixing hole along the axial direction, is communicated with the drilled circle fixing hole, can mark the position of the drilled circle fixing hole, and is square, triangular or oval;
the top cap is annular and is positioned on the surface of the circuit board body, the top cap is positioned at the edge of the drilled round fixing hole, and the top cap is provided with a plurality of through holes and can be connected with a ground wire;
the round fixing hole is a non-copper-deposition hole, the edge distance between the round fixing hole and the circuit board is more than 1.8D, wherein,
the diameter of the round-drilling fixing hole is 125mils or 159mils, wherein mils represents thousandths of an inch;
the through holes are distributed on the top cap in a circumferential array mode, copper is plated on the inner wall of the through holes, and the diameter of each through hole is 10 mils;
the dysmorphism hole is the non-heavy copper hole, just dysmorphism hole width and length are 59mils, dysmorphism hole error is 3 mils.
2. The circuit board with multipurpose fixing holes of claim 1, wherein the profiled holes have a depth of 0.3H; wherein H is the thickness of the circuit board.
3. The circuit board with multipurpose fastener holes of claim 2, wherein said top cap is made of metal and is plated with copper on its surface, said plated copper having a ring diameter greater than M +78.74 mils; wherein M is the diameter of the fixing nut; the special-shaped hole edge is provided with a non-copper-plated distance area, and the distance between the non-copper-plated distance area and the special-shaped hole edge is 8 mils.
4. A method for manufacturing a circuit board with a multipurpose fixing hole using the circuit board with a multipurpose fixing hole according to any one of claims 1 to 3, comprising:
marking the drilling position of a circuit board body, and forming a through drilling round fixing hole at the drilling position by using a drilling device;
step two, forming a special-shaped hole at the top of the drilling round fixing hole by using a punching device;
forming a copper plating area on the surface of the top cap, and bonding the top cap to the edge of the round drilling fixing hole;
and fourthly, forming a through hole on the top cap by utilizing the punching device.
5. The method for manufacturing a circuit board with multiple fixing holes according to claim 4, wherein the punching device is a laser punching machine or a drill.
6. The method as claimed in claim 5, wherein the diameter of the drill is 0.6-0.8mm, and the rotation speed is 600-700 rpm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260980.0A CN112533356B (en) | 2020-11-12 | 2020-11-12 | Circuit board with multipurpose fixing hole and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260980.0A CN112533356B (en) | 2020-11-12 | 2020-11-12 | Circuit board with multipurpose fixing hole and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112533356A CN112533356A (en) | 2021-03-19 |
| CN112533356B true CN112533356B (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202011260980.0A Active CN112533356B (en) | 2020-11-12 | 2020-11-12 | Circuit board with multipurpose fixing hole and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114983Y (en) * | 2007-09-03 | 2008-09-10 | 青岛海信电器股份有限公司 | Installation hold and circuit board with this install hole |
| CN101778536A (en) * | 2009-01-09 | 2010-07-14 | 深圳玛斯兰电路科技实业发展有限公司 | Process for controlling diameter of integrated positioning hole of inner cord board for printed circuit board |
| JP2010251402A (en) * | 2009-04-13 | 2010-11-04 | Toyota Motor Corp | Processing method of through hole |
-
2020
- 2020-11-12 CN CN202011260980.0A patent/CN112533356B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201114983Y (en) * | 2007-09-03 | 2008-09-10 | 青岛海信电器股份有限公司 | Installation hold and circuit board with this install hole |
| CN101778536A (en) * | 2009-01-09 | 2010-07-14 | 深圳玛斯兰电路科技实业发展有限公司 | Process for controlling diameter of integrated positioning hole of inner cord board for printed circuit board |
| JP2010251402A (en) * | 2009-04-13 | 2010-11-04 | Toyota Motor Corp | Processing method of through hole |
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| CN112533356A (en) | 2021-03-19 |
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