CN107803876A - A kind of PCB cover plate for drilling hole and preparation method thereof - Google Patents
A kind of PCB cover plate for drilling hole and preparation method thereof Download PDFInfo
- Publication number
- CN107803876A CN107803876A CN201711045653.1A CN201711045653A CN107803876A CN 107803876 A CN107803876 A CN 107803876A CN 201711045653 A CN201711045653 A CN 201711045653A CN 107803876 A CN107803876 A CN 107803876A
- Authority
- CN
- China
- Prior art keywords
- paper
- cardboard
- cover plate
- drilling hole
- pcb cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011111 cardboard Substances 0.000 claims abstract description 71
- 239000011087 paperboard Substances 0.000 claims abstract description 55
- 239000000123 paper Substances 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims description 25
- 238000000576 coating method Methods 0.000 claims description 25
- 239000002657 fibrous material Substances 0.000 claims description 4
- 238000013036 cure process Methods 0.000 claims description 3
- 239000002390 adhesive tape Substances 0.000 abstract description 13
- 238000004080 punching Methods 0.000 abstract description 11
- 239000000835 fiber Substances 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 13
- 230000000694 effects Effects 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 235000013312 flour Nutrition 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000004260 weight control Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- 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
- H05K2203/0214—Back-up or entry material, e.g. for mechanical drilling
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laminated Bodies (AREA)
- Drilling And Boring (AREA)
Abstract
The invention provides a kind of PCB cover plate for drilling hole and preparation method thereof, wherein, the cover plate includes a paper or cardboard, and paper or the cardboard upper surface is 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 present invention 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, can preferably solve the problems such as burr, sudden and violent hole, the drill point that poor, fiber length of rough surface, planarization of brown paper etc. is also easy to produce in Drilling operation twine bits, adhesive tape, cost is far below cold punching plate simultaneously, can preferably be used for back drill Drilling operation.
Description
Technical field
The present invention relates to PCB cover plates field, more particularly to a kind of PCB cover plate for drilling hole and preparation method thereof.
Background technology
Existing PCB back drills technology is that non-transmitting Conductive layer portions in the via hole after heavy copper are used into machine drilling processing side
Formula removes, and to ensure the part signal transmission stability retained, is advantageous to high speed transmission of signals.PCB back drill technology generally uses
High-frequency electronic principle of induction rig carries out the back drill processing that drills, and loop is turned on by drill point tip contacts cover plate using high-frequency electronic
(conductor) or pcb board start to calculate the lower depth bored of design.The cover plate of back drill generally use has aluminium flake+cold punching plate, one side at present
Copper-clad plate, one side covering aluminum plate, overlay film aluminium flake etc..In PCB back drill Drilling operations, the metal in cover plate（Aluminium or copper）Play to be formed
High-frequency electronic turns on the effect in loop, and suppresses Drilling operation burr；The upper surface that cold punching plate or one side cover copper (or aluminium) plate is exhausted
Edge material is advantageous 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, one side covering aluminum plate, overlay film aluminium flake manufactured cover plate cost compared with
Height, in recent years, PCB producers also use a kind of New Scheme and substituted, and way is to plate last layer gold on the pcb board surface for treating back drill
Belong to such as tin, Chrome, for substituting aluminium or copper in cover plate, form high-frequency electronic conducting loop, while suppress 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 scheme 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, prior art has yet to be improved and developed.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of PCB cover plate for drilling hole and its preparation
Method, it is intended to solve existing cover plate cost it is higher and be also easy to produce burr in drilling, sudden and violent hole, drill point twine silk, adhesive tape etc.
Problem.
Technical scheme is as follows：
A kind of PCB cover plate for drilling hole, wherein, including a paper or cardboard, paper or the cardboard upper surface be sequentially coated with dye
Chromatograph 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；The paper or
The thickness of cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2。
Described 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。
Described PCB cover plate for drilling hole, wherein, the gloss oil of the upper surface coating of the paper or cardboard is UV gloss oil.
Described PCB cover plate for drilling hole, wherein, the coated weight of the light oil reservoir on the upper and lower surface of paper or cardboard is
5-50 g/m2。
Described PCB cover plate for drilling hole, wherein, it is also coated with having illicit sexual relations between the lower surface of the paper or cardboard and light oil reservoir
Chromatograph.
Described PCB cover plate for drilling hole, wherein, the paper or cardboard are prepared by short fiber material.
Described PCB cover plate for drilling hole, wherein, the color of the dye layer is light brown or green.
Described PCB cover plate for drilling hole, wherein, the upper and lower surface of paper or cardboard is smooth surface.
Described PCB cover plate for drilling hole, wherein, the cardboard is white background white board.
A kind of preparation method of PCB cover plate for drilling hole, wherein, including step；
Dye layer is coated in the upper surface of paper or cardboard；
Light oil reservoir is coated on the upper and lower surface of paper or cardboard；
Cure process is carried out to the paper or cardboard, obtains the PCB cover plate for drilling hole with predetermined hardness.
Beneficial effect：
The invention provides a kind of PCB cover plate for drilling hole, including a paper or cardboard, paper or the cardboard upper surface applies successively
Dye layer and at least one layer of light oil reservoir are covered with, the lower surface of the paper or cardboard is at least coated with one layer of light oil reservoir；It is described
The thickness of paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2.The present invention selects suitable thickness and the paper of grammes per square metre
Or cardboard, and coat dye layer and light oil reservoir on the surface of paper or cardboard, can preferably solve brown paper rough surface,
The problems such as burr, sudden and violent hole, the drill points that are also easy to produce in Drilling operation such as planarization is poor, fiber length twine bits, adhesive tape, while cost
Far below cold punching plate, it can preferably be used for back drill Drilling operation.
Brief description of the drawings
Fig. 1 is a kind of structural representation of PCB cover plate for drilling hole preferred embodiment of the present invention.
Fig. 2 is a kind of flow chart of the preparation method preferred embodiment of PCB cover plate for drilling hole of the present invention.
Embodiment
The present invention provides a kind of PCB cover plate for drilling hole and preparation method thereof, to make the purpose of the present invention, technical scheme and effect
Fruit is clearer, clear and definite, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only
Only to explain the present invention, it is not intended to limit the present invention.
Referring to Fig. 1, Fig. 1 is a kind of structural representation of PCB cover plate for drilling hole preferred embodiment provided by the present invention,
As illustrated, the cover plate includes a paper or cardboard 10, the upper surface of paper or cardboard 10 is sequentially coated with dye layer 20
And at least one layer of light oil reservoir 30, the lower surface of the paper or cardboard 10 is at least coated with one layer of light oil reservoir 40；The paper
Or the thickness of cardboard 10 is 0.2-0.4mm, grammes per square metre 150-350g/m2。
Specifically, prior art is using made of aluminium flake+cold punching plate, single-side coated copper plate, one side covering aluminum plate, overlay film aluminium flake
The cost of cover plate is higher, even existing new alternative solution plates layer of metal such as tin etc. on the pcb board surface for treating back drill, uses
In substituting aluminium or copper in cover plate, high-frequency electronic conducting loop is formed, while suppress the burr of Drilling operation；Then during back drill again
The technical scheme of a piece of insulating materials such as cold punching plate, brown paper etc. is being 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
Difference, the problems such as Drilling operation is also easy to produce burr, sudden and violent hole, drill point twine silk, adhesive tape.
In order to solve the above problems, the paper or cardboard of the invention by selecting suitable thickness and grammes per square metre, and in paper
Or the surface coating dye layer and light oil reservoir of cardboard, can preferably solve poor, fiber length of rough surface, planarization of brown paper etc.
The problems such as burr, sudden and violent hole, the drill point being also easy to produce in Drilling operation twine bits, adhesive tape, while cost is far below cold punching plate, can be more
Good is used for back drill Drilling operation.
Further, the present invention has higher requirement to the paper or cardboard of selection, is 0.2- generally from 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 plate produces 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 plate and pcb board so that processing break flour easily falls into cover plate and pcb board
Between, so as to influence chip removal and machining accuracy.Therefore, preferred thickness of the present invention is 0.25-0.30mm, grammes per square metre 200-300g/m2
Paper or cardboard, can both avoid producing the compactness that excessive break flour ensures that paper or cardboard and pcb board, so as to ensureing plus
Work precision.
It is preferred that paper of the present invention or cardboard are prepared by short fiber material, short fiber material has
The discharge of break flour when being drilled beneficial to PCB, bits are twined so as to effectively reduce drill point.
Further, the present invention to the upper surface of paper or cardboard by dyeing, cover plate when facilitating look at PCB drillings
And whether pcb board occurs exception, it is preferable that is considered from cost control, the upper surface of the paper or cardboard is coated and dyed
Layer.It is preferred that the color of the dye layer is light brown or green, but not limited to this.
In the present invention, the upper and lower surface of paper or cardboard is smooth surface, and the setting of smooth surface not only improves
It is adjacent to PCB surface, suppresses processing break flour and fall between cover plate and PCB；Also it is beneficial to the coating of surface gloss oil and coated weight control simultaneously
System, reduces cost.
It is preferred that cardboard of the present invention or paper are two-sided white board or white background white board, preferably white background white board.
Further, the gloss oil of the upper surface coating of the paper or cardboard be UV gloss oil or be UV gloss oil with it is common
Gloss oil combination layer, the coated weight of the light oil reservoir on the upper and lower surface of paper or cardboard is 5-50 g/m2。
Specifically, it is proposed by the present invention to coat light oil reservoir on the upper and lower surface of paper or cardboard, preferably applied in upper surface
At least one layer of UV light oil reservoirs are covered, one layer of common light oil reservoir is at least coated in lower surface.As a rule, the hardness of UV gloss oil and smooth
Degree is better than common gloss oil, therefore UV gloss oil is coated in the outer surface of paper or cardboard, can improve the hardness of coating surface
And smoothness, be advantageous to improve sudden and violent hole and adhesive tape；Further, the coating number of plies is more or coating thickness is thicker, is more beneficial to change
It is apt to sudden and violent hole and adhesive tape, improves the reuse number of adhesive tape, integrated cost and effect factor, the present invention preferably paper or paper
The coated weight of the light oil reservoir on the upper and lower surface of plate is 5-50 g/m2；The lower surface of paper or cardboard can coat at least one layer of common
Light oil reservoir, because lower surface is adjacent to PCB, influenceed by Drilling operation smaller, surface is smooth and has certain hardness, therefore is control
This is made, preferably lower surface coats one layer of common gloss oil.
Based on a kind of above-mentioned PCB cover plate for drilling hole, present invention also offers a kind of preparation method of PCB cover plate for drilling hole,
Wherein, as shown in Fig. 2 including step；
S10, the upper surface of paper or cardboard coat dye layer；
S20, the upper and lower surface of paper or cardboard coat light oil reservoir；
S30, cure process is carried out to the paper or cardboard, obtain the PCB cover plate for drilling hole with predetermined hardness.
Specifically, the thickness of the paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2；The paper or
The coated weight of the light oil reservoir on the upper and lower surface of cardboard is 5-50 g/m2。
The PCB cover plate for drilling hole specific embodiments prepared below for the present invention：
Embodiment 1：
From 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m2, lower surface coating light
Oily 8g/ m2。
Embodiment 2：
From 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 15g/ m2, lower surface coating
Gloss oil 8g/ m2。
Embodiment 3：
From 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 25g/ m2, lower surface coating
Gloss oil 8g/ m2。
Embodiment 4：
From 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating gloss oil 8g/ m2, lower surface coating light
Oily 8g/ m2。
Embodiment 5：
From 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：
From 250g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating gloss oil 15g/ m2, lower surface coating
Gloss oil 8g/ m2。
Embodiment 7：
From 180g/ m2Two-sided white board, two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m2, lower surface coating light
Oily 8g/ m2。
Embodiment 8：
It is two-sided to dye light brown, upper smooth surface coating UV oil 8g/ m from 350g/m2 two-sided white board2, lower surface coating light
Oily 8g/ m2。
Following table one is effect table of the cover plate in PCB boring procedures in the above embodiment of the present invention.
The embodiment effect chart of table one
| 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 | Typically | It is extremely slight | It is moderate | It is more serious | Nothing |
| Embodiment 8 | Typically | 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 of cardboard, which twine bits to hole position precision, burr, drill point, certain shadow
Ring；Surface coats common gloss oil, easy sudden and violent hole, easily glued adhesive tape；Surface coating UV oil has in terms of sudden and violent hole and adhesive tape preferably to be changed
Kind, coated weight is bigger, and effect is better.
In summary, the invention provides a kind of PCB cover plate for drilling hole, including a paper or cardboard, the paper or paper
Plate upper surface is 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 light oil reservoir；The thickness of the paper or cardboard is 0.2-0.4mm, grammes per square metre 150-350g/m2.Present invention selection is suitable thick
The paper or cardboard of degree and grammes per square metre, and dye layer and light oil reservoir are coated on the surface of paper or cardboard, can preferably solve ox-hide
Burr, sudden and violent hole, the drill point that poor, fiber length of rough surface, planarization of paper etc. is also easy to produce in Drilling operation twine bits, adhesive tape etc.
Problem, while cost is far below cold punching plate, can preferably be used for back drill Drilling operation.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of PCB cover plate for drilling hole, it is characterised in that including a paper or cardboard, paper or the cardboard upper surface is 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, it is characterised 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, it is characterised in that the upper surface coating of the paper or cardboard
Gloss oil be UV gloss oil.
4. PCB cover plate for drilling hole according to claim 1, it is characterised in that the light on the upper and lower surface of paper or cardboard
The coated weight of oil reservoir is 5-50 g/m2。
5. PCB cover plate for drilling hole according to claim 1, it is characterised in that the lower surface of the paper or cardboard and light
Dye layer is also coated between oil reservoir.
6. PCB cover plate for drilling hole according to claim 1, it is characterised 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, it is characterised in that the color of the dye layer be light brown or
Green.
8. PCB cover plate for drilling hole according to claim 1, it is characterised in that the upper and lower surface of paper or cardboard is
Smooth surface.
9. PCB cover plate for drilling hole according to claim 1, it is characterised in that the cardboard is white background white board.
10. a kind of preparation method of PCB cover plate for drilling hole, it is characterised in that including step；
Dye layer is coated in the upper surface of paper or cardboard；
Light oil reservoir is coated on the upper and lower surface of paper or cardboard；
Cure process is carried out to the paper or cardboard, obtains the PCB cover plate for drilling hole with predetermined hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045653.1A CN107803876B (en) | 2017-10-31 | 2017-10-31 | Cover plate for PCB drilling and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045653.1A CN107803876B (en) | 2017-10-31 | 2017-10-31 | Cover plate for PCB drilling and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107803876A true CN107803876A (en) | 2018-03-16 |
| CN107803876B CN107803876B (en) | 2024-05-03 |
Family
ID=61591035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711045653.1A Active CN107803876B (en) | 2017-10-31 | 2017-10-31 | Cover plate for PCB drilling and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107803876B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109176703A (en) * | 2018-08-01 | 2019-01-11 | 广州美维电子有限公司 | A kind of boring method improving high thick diameter pcb board borehole accuracy |
| CN111251366A (en) * | 2020-01-17 | 2020-06-09 | 珠海纵航科技有限公司 | PCB drilling cover plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009004430A (en) * | 2007-06-19 | 2009-01-08 | Toyo Cloth Co Ltd | Backup board for drilling, and method of manufacturing the same |
| CN204728142U (en) * | 2015-06-30 | 2015-10-28 | 烟台博源科技材料股份有限公司 | A kind of two-sided aluminized paper |
| CN206123803U (en) * | 2016-10-11 | 2017-04-26 | 深圳市柳鑫实业股份有限公司 | PCB machine drilling is with apron |
| CN207480768U (en) * | 2017-10-31 | 2018-06-12 | 深圳市柳鑫实业股份有限公司 | A kind of PCB cover plate for drilling hole |
-
2017
- 2017-10-31 CN CN201711045653.1A patent/CN107803876B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009004430A (en) * | 2007-06-19 | 2009-01-08 | Toyo Cloth Co Ltd | Backup board for drilling, and method of manufacturing the same |
| CN204728142U (en) * | 2015-06-30 | 2015-10-28 | 烟台博源科技材料股份有限公司 | A kind of two-sided aluminized paper |
| CN206123803U (en) * | 2016-10-11 | 2017-04-26 | 深圳市柳鑫实业股份有限公司 | PCB machine drilling is with apron |
| CN207480768U (en) * | 2017-10-31 | 2018-06-12 | 深圳市柳鑫实业股份有限公司 | A kind of PCB cover plate for drilling hole |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109176703A (en) * | 2018-08-01 | 2019-01-11 | 广州美维电子有限公司 | A kind of boring method improving high thick diameter pcb board borehole accuracy |
| CN111251366A (en) * | 2020-01-17 | 2020-06-09 | 珠海纵航科技有限公司 | PCB drilling cover plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107803876B (en) | 2024-05-03 |
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