CN207480768U - A kind of PCB cover plate for drilling hole - Google Patents
A kind of PCB cover plate for drilling hole Download PDFInfo
- Publication number
- CN207480768U CN207480768U CN201721423178.2U CN201721423178U CN207480768U CN 207480768 U CN207480768 U CN 207480768U CN 201721423178 U CN201721423178 U CN 201721423178U CN 207480768 U CN207480768 U CN 207480768U
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- paper
- cardboard
- cover plate
- drilling hole
- pcb cover
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- Laminated Bodies (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The utility model provides a kind of PCB cover plate for drilling hole, wherein, the cover board includes a paper or cardboard, and the paper or cardboard upper surface are sequentially coated with dye layer and at least one layer of light oil reservoir, and the lower surface of the paper or cardboard is at least coated with one layer of light oil reservoir；The thickness of the paper or cardboard is 0.2 0.4mm, and grammes per square metre is 150 350g/m2.The utility model selects suitable thickness and the paper or cardboard of grammes per square metre, and coat dye layer and light oil reservoir on the surface of paper or cardboard, the problems such as burr, sudden and violent hole, the drill point that poor, fiber length of rough surface, planarization that brown paper can preferably be solved etc. is also easy to produce in Drilling operation twine bits, adhesive tape, cost can preferably be used for back drill Drilling operation far below cold punching plate simultaneously.
Description
Technical field
The utility model is related to PCB cover boards field more particularly to a kind of PCB cover plate for drilling hole.
Background technology
Existing PCB back drills technology is that Conductive layer portions non-transmitting in the via hole after heavy copper are used machine drilling processing side
Formula removes, and to ensure the part signal transmission stability retained, is conducive to high speed transmission of signals.PCB back drill technology generally uses
High-frequency electronic principle of induction drilling machine carries out drilling back drill processing, and circuit is connected by drill point tip contacts cover board using high-frequency electronic
(conductor) or pcb board start to calculate the lower depth bored of design.The cover board of back drill generally use has aluminium flake+cold punching plate, single side at present
Copper-clad plate, single side covering aluminum plate, overlay film aluminium flake etc..In PCB back drill Drilling operations, the metal in cover board（Aluminium or copper）It plays to be formed
The effect in circuit is connected in high-frequency electronic, and inhibits Drilling operation burr；The upper surface that cold punching plate or single side cover copper (or aluminium) plate is exhausted
Edge material is conducive to Drilling operation and enters to bore positioning, improves the hole position precision of processing.
But due to aluminium flake+cold punching plate, single-side coated copper plate, single side covering aluminum plate, overlay film aluminium flake manufactured cover board cost compared with
Height, in recent years, PCB producers also use a kind of New Scheme and substitute, and way is in the pcb board surface plating last layer gold for treating back drill
Belong to such as tin, Chrome, for substituting the aluminium or copper in cover board, form high-frequency electronic conducting circuit, while inhibit the hair of Drilling operation
Thorn；Then a piece of insulating materials such as cold punching plate, brown paper etc. is being placed above again during back drill, is playing protection metal covering and raising adds
The hole position precision effect of work.The cold punching plate cost used in technical solution is still higher, and brown paper rough surface, planarization are poor,
The problems such as Drilling operation is also easy to produce burr, sudden and violent hole, drill point twine silk, adhesive tape.
Therefore, the prior art has yet to be improved and developed.
Utility model content
In view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of PCB cover plate for drilling hole, it is intended to
It is higher and be also easy to produce burr in drilling, the problems such as sudden and violent hole, drill point twine silk, adhesive tape to solve existing cover board cost.
The technical solution of the utility model is as follows：
A kind of PCB cover plate for drilling hole, wherein, including a paper or cardboard, the paper or cardboard upper surface coat successively
There are dye layer and an at least one layer of light oil reservoir, the lower surface of the paper or cardboard is at least coated with one layer of light oil reservoir；The paper
It opens or the thickness of cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2。
The PCB cover plate for drilling hole, wherein, the thickness of the cardboard or paper is 0.25-0.3mm, grammes per square metre 200-
300 g/m2。
The PCB cover plate for drilling hole, wherein, the gloss oil of the upper surface coating of the paper or cardboard is UV gloss oil.
The PCB cover plate for drilling hole, wherein, the coated weight of the light oil reservoir on the paper or the upper and lower surface of cardboard is
5-50 g/m2。
The PCB cover plate for drilling hole, wherein, it is also coated with having illicit sexual relations between the lower surface and light oil reservoir of the paper or cardboard
Chromatograph.
The PCB cover plate for drilling hole, wherein, the paper or cardboard are prepared by short fiber material.
The PCB cover plate for drilling hole, wherein, the color of the dye layer is light brown or green.
The PCB cover plate for drilling hole, wherein, the paper or the upper and lower surface of cardboard are smooth surface.
The PCB cover plate for drilling hole, wherein, the cardboard is white background white board.
Advantageous effect：The utility model provides a kind of PCB cover plate for drilling hole, including a paper or cardboard, the paper
Or cardboard upper surface is sequentially coated with dye layer and at least one layer of light oil reservoir, the lower surface of the paper or cardboard at least coats
There is one layer of light oil reservoir；The thickness of the paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2.The utility model selects
The paper or cardboard of suitable thickness and grammes per square metre, and dye layer and light oil reservoir are coated on the surface of paper or cardboard, it can be preferable
Solve brown paper burr, sudden and violent hole, drill point that rough surface, planarization be poor, fiber is grown etc. is also easy to produce in Drilling operation twine bits,
The problems such as adhesive tape, while cost can preferably be used for back drill Drilling operation far below cold punching plate.
Description of the drawings
Fig. 1 is a kind of structure diagram of PCB cover plate for drilling hole preferred embodiment of the utility model.
Specific embodiment
The utility model provides a kind of PCB cover plate for drilling hole, to make the purpose of this utility model, technical solution and effect more
Add it is clear, clear and definite, below to the utility model be further described.It should be appreciated that specific embodiment described herein is only
Only to explain the utility model, it is not used to limit the utility model.
Referring to Fig. 1, Fig. 1 shows for a kind of structure of PCB cover plate for drilling hole preferred embodiment provided by the utility model
It is intended to, as shown in the figure, the cover board includes a paper or cardboard 10, the paper or 10 upper surface of cardboard are sequentially coated with dyeing
The lower surface of layer 20 and at least one layer of light oil reservoir 30, the paper or cardboard 10 is at least coated with one layer of light oil reservoir 40；It is described
The thickness of paper or cardboard 10 is 0.2-0.4mm, grammes per square metre 150-350g/m2。
Specifically, the prior art is using made of aluminium flake+cold punching plate, single-side coated copper plate, single side covering aluminum plate, overlay film aluminium flake
The cost of cover board is higher, even existing novel alternative solution is in pcb board surface plating last layer metal such as tin for treating back drill etc., use
In substituting aluminium or copper in cover board, high-frequency electronic conducting circuit is formed, while inhibit the burr of Drilling operation；Then during back drill again
In the technical solution that a piece of insulating materials such as cold punching plate, brown paper etc. is placed above, protection metal covering can be played and raising adds
The hole position precision effect of work.But to still have cost higher for prior art, and using brown paper rough surface, planarization
The problems such as difference, Drilling operation is also easy to produce burr, sudden and violent hole, drill point twine silk, adhesive tape.
To solve the above-mentioned problems, the utility model is by selecting the paper or cardboard of suitable thickness and grammes per square metre, and
The surface of paper or cardboard coats dye layer and light oil reservoir, and rough surface, the planarization that can preferably solve brown paper are poor, fiber
The problems such as burr, sudden and violent hole, the drill point being also easy to produce in Drilling operation such as long twines bits, adhesive tape, while cost is far below cold punching plate,
Back drill Drilling operation can be preferably used for.
Further, the utility model has higher requirement to the paper or cardboard of selection, and it is 0.2- usually to select thickness
0.4mm, grammes per square metre 150-350g/m2Paper or cardboard, when paper or calliper are too thick（Such as more than 0.4mm）When, then
Cover board generates excessive break flour in Drilling operation so that drill point twines bits, so as to influence chip removal；When paper or calliper are too thin
（It is, for example, less than 0.2mm）When, then it can influence the degree of being adjacent to of cover board and pcb board so that processing break flour easily falls into cover board and pcb board
Between, so as to influence chip removal and machining accuracy.Therefore, the utility model preferred thickness is 0.25-0.30mm, grammes per square metre 200-
300g/m2Paper or cardboard, can both avoid generating the compactness that excessive break flour ensures that paper or cardboard and pcb board, from
And ensure machining accuracy.
Preferably, paper or cardboard are prepared by short fiber material used by the utility model, staple fiber material
Material is conducive to the discharge of break flour during PCB drillings, and bits are twined so as to effectively reduce drill point.
Further, the utility model is dyed by the upper surface to paper or cardboard, when facilitating look at PCB drillings
Whether cover board and pcb board are abnormal, it is preferable that are considered from cost control, the upper surface of the paper or cardboard is coated
Dye layer.Preferably, the color of the dye layer is light brown or green, but not limited to this.
In the utility model, the paper or the upper and lower surface of cardboard are smooth surface, and the setting of smooth surface is existing
It is adjacent to conducive to PCB surface, processing break flour is inhibited to fall between cover board and PCB；Also it is conducive to surface gloss oil simultaneously to coat and coat
Amount control, reduces cost.
Preferably, cardboard described in the utility model or paper are two-sided white board or white background white board, preferably white background is white
Cardboard.
Further, the gloss oil of the upper surface of the paper or cardboard coating be UV gloss oil or be UV gloss oil with it is common
The coated weight of the light oil reservoir on gloss oil combination layer, the paper or the upper and lower surface of cardboard is 5-50 g/m2。
Specifically, the utility model proposes the upper and lower surface of paper or cardboard coat light oil reservoir, preferably in upper table
Face coats at least one layer UV light oil reservoirs, and one layer of common light oil reservoir is at least coated in lower surface.Usually, the hardness of UV gloss oil and
Smoothness is better than common gloss oil, therefore UV gloss oil is coated in the outer surface of paper or cardboard, can improve coating surface
Hardness and smoothness are conducive to improve sudden and violent hole and adhesive tape；Further, the coating number of plies is more or coating film thickness is thicker, more sharp
In improving sudden and violent hole and adhesive tape, the reuse number of adhesive tape is improved, comprehensive cost and effect factor, the utility model are preferred
The coated weight of the light oil reservoir on paper or the upper and lower surface of cardboard is 5-50 g/m2；The lower surface of paper or cardboard can coat at least
One layer of common light oil reservoir since lower surface is adjacent to PCB, is influenced smaller by Drilling operation, and surface is smooth and has certain hardness i.e.
Can, therefore cost in order to control, preferably lower surface coat one layer of common gloss oil.
The PCB cover plate for drilling hole specific embodiments prepared below for the utility model：
Embodiment 1：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 2：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 15g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 3：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 25g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 4：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating gloss oil 8g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 5：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating gloss oil 10g/ m2, UV oil 5g/
m2, lower surface coating gloss oil 8g/ m2。
Embodiment 6：
Select 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating gloss oil 15g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 7：
Select 180g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Embodiment 8：
The two-sided white board of 350g/m2 is selected, it is two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m2, lower surface applies
Cover gloss oil 8g/ m2。
Following table one is effect table of the cover board in PCB boring procedures in the utility model above-described embodiment.
One embodiment effect chart of table
| Case | Hole position precision | Sudden and violent hole | Adhesive tape | Burr | Drill point twines bits |
| Embodiment 1 | It is good | Slightly | It is moderate | Slightly | Nothing |
| Embodiment 2 | It is good | It is extremely slight | It is moderate | Slightly | Nothing |
| Embodiment 3 | It is good | Nothing | It is moderate | Slightly | Nothing |
| Embodiment 4 | It is good | It is more serious | Seriously | Slightly | Nothing |
| Embodiment 5 | It is good | It is extremely slight | It is moderate | Slightly | Nothing |
| Embodiment 6 | It is good | Slightly | Seriously | Slightly | Nothing |
| Embodiment 7 | Generally | It is extremely slight | It is moderate | It is more serious | Nothing |
| Embodiment 8 | Generally | Slightly | It is moderate | Slightly | It is more serious |
From the point of view of above-mentioned experimental result, the thickness or grammes per square metre size device to hole position precision of cardboard, burr, drill point twines bits has centainly
Influence；Surface coats common gloss oil, easy sudden and violent hole, easily glued adhesive tape；Surface coating UV oil has preferably in terms of sudden and violent hole and adhesive tape
Improvement, coated weight is bigger, and effect is better.
In conclusion the utility model provides a kind of PCB cover plate for drilling hole, including a paper or cardboard, the paper
Or cardboard upper surface is sequentially coated with dye layer and at least one layer of light oil reservoir, the lower surface of the paper or cardboard at least coats
There is one layer of light oil reservoir；The thickness of the paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2.The utility model selects
The paper or cardboard of suitable thickness and grammes per square metre, and dye layer and light oil reservoir are coated on the surface of paper or cardboard, it can be preferable
Solve brown paper burr, sudden and violent hole, drill point that rough surface, planarization be poor, fiber is grown etc. is also easy to produce in Drilling operation twine bits,
The problems such as adhesive tape, while cost can preferably be used for back drill Drilling operation far below cold punching plate.
It should be understood that the application of the utility model is not limited to above-mentioned citing, those of ordinary skill in the art are come
It says, can be improved or converted according to the above description, all these modifications and variations should all belong to the appended power of the utility model
The protection domain of profit requirement.
Claims (9)
1. a kind of PCB cover plate for drilling hole, which is characterized in that including a paper or cardboard, the paper or cardboard upper surface are successively
Coated with dye layer and at least one layer of light oil reservoir, the lower surface of the paper or cardboard is at least coated with one layer of light oil reservoir；Institute
The thickness for stating paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2。
2. PCB cover plate for drilling hole according to claim 1, which is characterized in that the thickness of the cardboard or paper is 0.25-
0.3mm, grammes per square metre are 200-300 g/m2。
3. PCB cover plate for drilling hole according to claim 1, which is characterized in that the upper surface of the paper or cardboard coats
Gloss oil be UV gloss oil.
4. PCB cover plate for drilling hole according to claim 1, which is characterized in that the paper or the light on the upper and lower surface of cardboard
The coated weight of oil reservoir is 5-50 g/m2。
5. PCB cover plate for drilling hole according to claim 1, which is characterized in that the lower surface and light of the paper or cardboard
Dye layer is also coated between oil reservoir.
6. PCB cover plate for drilling hole according to claim 1, which is characterized in that the paper or cardboard are by short fiber material
It is prepared.
7. PCB cover plate for drilling hole according to claim 1, which is characterized in that the color of the dye layer for light brown or
Green.
8. PCB cover plate for drilling hole according to claim 1, which is characterized in that the paper or the upper and lower surface of cardboard are
Smooth surface.
9. PCB cover plate for drilling hole according to claim 1, which is characterized in that the cardboard is white background white board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721423178.2U CN207480768U (en) | 2017-10-31 | 2017-10-31 | A kind of PCB cover plate for drilling hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721423178.2U CN207480768U (en) | 2017-10-31 | 2017-10-31 | A kind of PCB cover plate for drilling hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207480768U true CN207480768U (en) | 2018-06-12 |
Family
ID=62478280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721423178.2U Active CN207480768U (en) | 2017-10-31 | 2017-10-31 | A kind of PCB cover plate for drilling hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207480768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107803876A (en) * | 2017-10-31 | 2018-03-16 | 深圳市柳鑫实业股份有限公司 | A kind of PCB cover plate for drilling hole and preparation method thereof |
| CN112770506A (en) * | 2020-12-10 | 2021-05-07 | 惠州市特创电子科技股份有限公司 | Back drilling method of circuit board and circuit board |
-
2017
- 2017-10-31 CN CN201721423178.2U patent/CN207480768U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107803876A (en) * | 2017-10-31 | 2018-03-16 | 深圳市柳鑫实业股份有限公司 | A kind of PCB cover plate for drilling hole and preparation method thereof |
| CN107803876B (en) * | 2017-10-31 | 2024-05-03 | 深圳市柳鑫实业股份有限公司 | Cover plate for PCB drilling and preparation method thereof |
| CN112770506A (en) * | 2020-12-10 | 2021-05-07 | 惠州市特创电子科技股份有限公司 | Back drilling method of circuit board and circuit board |
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