CN109108318A - A kind of boring method improving borehole accuracy - Google Patents
A kind of boring method improving borehole accuracy Download PDFInfo
- Publication number
- CN109108318A CN109108318A CN201810833027.7A CN201810833027A CN109108318A CN 109108318 A CN109108318 A CN 109108318A CN 201810833027 A CN201810833027 A CN 201810833027A CN 109108318 A CN109108318 A CN 109108318A
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- CN
- China
- Prior art keywords
- plate
- sword
- borehole accuracy
- production plate
- nozzle
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of boring methods for improving borehole accuracy, comprising the following steps: production plate contraposition is placed on drilling machine table top；It needs to drill through hole location on production plate using ultrashort cutting drill nozzle and first drills out blind hole, the bottom of the blind hole is located in the dielectric layer under table copper；The long thickness for being less than production plate of the sword of the ultrashort cutting drill nozzle；Continue drill down on the basis of the blind hole using long cutting drill nozzle identical with ultrashort cutting drill nozzle sword diameter and drill production plate, to form through-hole；The long thickness for being greater than production plate of the sword of the long cutting drill nozzle.Using the method for the present invention by the way that the precision of drilling can be effectively improved by the way of drilling twice, and micro- borehole accuracy for boring and (boring nozzle diameter≤0.3mm) is improved to greatest extent, meet borehole accuracy≤2mil boring requirement.
Description
Technical field
The present invention relates to printed wiring board manufacture technology fields, and in particular to a kind of boring method for improving borehole accuracy.
Background technique
As printed circuit board develops to miniaturization, high-precision densification direction, the density in hole constantly rises and pitch of holes is continuous
Reduce, cause borehole accuracy requirement higher and higher, drilling is positioned using drilling machine upper platen (chock plate) using pin, and lamination is reduced
Number and the on circuit boards modes such as lid coating aluminium flake guarantee borehole accuracy；The above method is bored in specific drilling using disposable
Circuit board is worn, but requirement is unable to satisfy for the existing boring method of hole position accuracy requirement≤2mil plank, and use coating aluminium
Though piece can improve borehole accuracy but unit cost is high, while also be unable to satisfy hole position accuracy≤2mil boring requirement.
Summary of the invention
It is an object of the invention to overcome existing technological deficiency, provide a kind of boring method for improving borehole accuracy,
This method can effectively improve the precision of drilling by way of drilling twice, and improve micro- bore to greatest extent and (bore nozzle diameter
≤ 0.3mm) borehole accuracy, meet borehole accuracy≤2mil boring requirement.
It is including following in order to solve the above-mentioned technical problems, the present invention provides a kind of boring method for improving borehole accuracy
Step:
S1, production plate contraposition is placed on drilling machine table top；
S2, it needs to drill through hole location on production plate using ultrashort cutting drill nozzle and first drills out blind hole, the bottom position of the blind hole
In dielectric layer under table copper；The long thickness for being less than production plate of the sword of the ultrashort cutting drill nozzle；
S3, continue drill down on the basis of the blind hole using long cutting drill nozzle identical with ultrashort cutting drill nozzle sword diameter and bore
Production plate is worn, to form through-hole；The long thickness for being greater than production plate of the sword of the long cutting drill nozzle.
Preferably, in step S2, the sword diameter of the ultrashort cutting drill nozzle is 0.2mm, a length of 1.9mm of sword, and handle diameter is
3.175mm。
Preferably, in step S3, the sword diameter of the long cutting drill nozzle is 0.2mm, and a length of 3.8mm of sword, handle diameter is 3.175mm.
Preferably, in step S2, the depth of the blind hole is 0.4-0.5mm.
It preferably, further include step S11 between step S1 and S2: in production plate surface upper cover unification size and production plate phase
Same aluminium flake then tapes at the edge of production plate and aluminium flake and fixes the two.
Preferably, the sword of the long cutting drill nozzle is long is greater than production the sum of plate and the thickness of aluminium flake.
Preferably, step S1 specifically includes the following steps:
S01, one block of chock plate is first placed on drilling machine table top；
S02, three pin holes are bored on chock plate, then pin is inserted into pin hole；
S03, then using pin as positioning datum the fine backing plate of the identical wood of size and production plate are successively installed on chock plate
On.
Preferably, it in step S11, tapes at the edge of the wooden fine backing plate, production plate and aluminium flake and fixes three.
Preferably, the production plate is the multilayer for being press-fitted together as one core material and outer copper foil by prepreg
Plate.
Compared with prior art, the invention has the following beneficial effects:
The method of the present invention is for the through-hole in same aperture and same position on production plate, and using two kinds, sword diameter is identical but sword is long
Different cutter carries out drilling processing twice, and drilling for the first time drills out blind hole on production plate using ultrashort cutting drill nozzle, using super
The long shorter characteristic of the sword of short cutting drill nozzle, can increase to greatest extent and bore nozzle rigidity, reduce the amplitude of oscillation for boring nozzle in drilling, improve
Borehole accuracy, and the blind hole drilled out for the first time can provide precisely processing anchor point for second of drilling, second of drilling is blind
Production plate is once drilled using long cutting drill nozzle on the basis of hole, to form through-hole, plate table will be produced when drilling because of first time
Face layers of copper brill go, cutting resistance when second of drilling can be reduced in this way, can be further reduced long cutting drill nozzle drilling when
The amplitude of oscillation, to further improve borehole accuracy；The method of the present invention is improved micro- to greatest extent by way of drilling twice
The borehole accuracy for boring and (boring nozzle diameter≤0.3mm), meets borehole accuracy≤2mil boring requirement；And the method for the present invention can will be existing
Coating aluminium flake used in technology replaces with common aluminium flake (i.e. without the aluminium flake of coating), can effectively reduce drilling cost.
Specific embodiment
In order to more fully understand technology contents of the invention, below in conjunction with specific embodiment to technical side of the invention
Case is described further and illustrates.
Embodiment
The present embodiment provides a kind of boring methods for improving borehole accuracy, specifically includes the following steps:
(1), one block of chock plate is first placed on drilling machine table top, and chock plate is fixed on drilling machine table top by screw,
For protecting drilling machine table top.
(2), the pin hole that three apertures are 3.15mm, three pins are bored at the position of corresponding production plate edges of boards on chock plate
Nail hole is in angular distribution, and then the pin that diameter is 3.15mm is fitted into pin hole by iron hammer.
(3), the fine backing plate of the identical wood of size and production plate are successively then installed on chock plate using pin as positioning datum
On, the location hole positioned with bayonet fittings is drilled at the position that corresponds to pin on the wooden fine backing plate and production plate in advance；The wooden fine pad
The effect of plate are as follows: first is that protection drilling machine table top, second is that prevent aperture after drilling from the problem of criticizing cutting edge of a knife or a sword occur, third is that when as drilling
Dust suction buffer area.
(4), in production plate surface upper cover unification size aluminium flake identical with production plate, then in the wooden fine backing plate, production plate
It tapes with the edge of aluminium flake and fixes three, when preventing drilling, the problem that displacement causes hole inclined occurs in aluminium flake；The effect of aluminium flake
Have first is that borehole accuracy can be improved, second is that preventing aperture after drilling from the problem of criticizing cutting edge of a knife or a sword occur.
(5), it after drilling aluminium flake using ultrashort cutting drill nozzle, needs to drill through hole location on production plate and first drills out blind hole, blind hole
Bottom be located at the dielectric layer (i.e. semi-solid preparation layer) under table copper Nei, the depth of blind hole is 0.4-0.5mm；
Specifically, the sword diameter of ultrashort cutting drill nozzle is 0.2mm, a length of 1.9mm of sword, handle diameter is 3.175mm.
Specifically, the long thickness for being less than production plate of the sword of ultrashort cutting drill nozzle, and the sword length of ultrashort cutting drill nozzle is greater than aluminium flake
Thickness.
(6), continue drill down on the basis of blind hole using long cutting drill nozzle identical with ultrashort cutting drill nozzle sword diameter and drill
Plate is produced, to form through-hole.
Specifically, the sword diameter of long cutting drill nozzle is 0.2mm, a length of 3.8mm of sword, handle diameter is 3.175mm；And the sword of long cutting drill nozzle
It is long to be greater than production the sum of plate and the thickness of aluminium flake.
Among the above, the specific manufacturing process for producing plate is as follows:
S1, sawing sheet: outputing core plate by jigsaw size 520mm × 620mm, core thickness 2.0mm, outer copper foil with a thickness of
1OZ；According to design requirement, the position for drilling after pressing is reserved on core material, which is known as the position that drills.
S2, internal layer circuit production (negative film technique): inner figure transfer is coated on core plate photosensitive with vertical application machine
Film, 8 μm of the film thickness monitoring of light-sensitive surface；Using Full-automatic exposure machine, completed on core plate with 5-6 lattice exposure guide rule (21 lattice exposure guide rule)
Internal layer circuit exposure；Soft board core plate after exposure development is etched internal layer circuit by internal layer etching, and the measurement of internal layer line width is
3mil；Then internal layer AOI checks the defects of opening short circuit, route notch, route pin hole of internal layer circuit, defective to scrap processing,
Flawless product goes out to downstream.
S3, pressing: (sequence generally overlapped is outer layer copper after being overlapped core plate and outer copper foil in advance by prepreg
Foil, prepreg, core plate, prepreg, outer copper foil), then select lamination appropriate by superimposed sheet according to plate Tg
Be press-fitted together as one, formed production plate, produce plate with a thickness of 2.5mm.
It is provided for the embodiments of the invention technical solution above to be described in detail, specific case used herein
The principle and embodiment of the embodiment of the present invention are expounded, the explanation of above embodiments is only applicable to help to understand this
The principle of inventive embodiments；At the same time, for those skilled in the art, according to an embodiment of the present invention, in specific embodiment party
There will be changes in formula and application range, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (9)
1. a kind of boring method for improving borehole accuracy, which comprises the following steps:
S1, production plate contraposition is placed on drilling machine table top；
S2, it needs to drill through hole location on production plate using ultrashort cutting drill nozzle and first drills out blind hole, the bottom of the blind hole is located at table
In dielectric layer under copper；The long thickness for being less than production plate of the sword of the ultrashort cutting drill nozzle；
S3, continue drill down on the basis of the blind hole using long cutting drill nozzle identical with ultrashort cutting drill nozzle sword diameter and drill life
Plate is produced, to form through-hole；The long thickness for being greater than production plate of the sword of the long cutting drill nozzle.
2. the boring method according to claim 1 for improving borehole accuracy, which is characterized in that described ultrashort in step S2
The sword diameter of cutting drill nozzle is 0.2mm, and a length of 1.9mm of sword, handle diameter is 3.175mm.
3. the boring method according to claim 1 or 2 for improving borehole accuracy, which is characterized in that in step S3, the length
The sword diameter of cutting drill nozzle is 0.2mm, and a length of 3.8mm of sword, handle diameter is 3.175mm.
4. the boring method according to claim 1 for improving borehole accuracy, which is characterized in that in step S2, the blind hole
Depth be 0.4-0.5mm.
5. the boring method according to claim 1 for improving borehole accuracy, which is characterized in that also wrapped between step S1 and S2
Include step S11: in production plate surface upper cover unification size aluminium flake identical with production plate, then at the edge of production plate and aluminium flake
It tapes and fixes the two.
6. the boring method according to claim 5 for improving borehole accuracy, which is characterized in that the sword of the long cutting drill nozzle is long
Greater than production the sum of plate and the thickness of aluminium flake.
7. the boring method according to claim 5 for improving borehole accuracy, which is characterized in that step S1 specifically includes following
Step:
S01, one block of chock plate is first placed on drilling machine table top；
S02, three pin holes are bored on chock plate, then pin is inserted into pin hole；
S03, then using pin as positioning datum successively the fine backing plate of the identical wood of size and production plate are installed on chock plate.
8. the boring method according to claim 7 for improving borehole accuracy, which is characterized in that in step S11, in the wooden fine pad
The edge of plate, production plate and aluminium flake, which is taped, fixes three.
9. the boring method according to claim 1 for improving borehole accuracy, which is characterized in that the production plate is by half
The multi-layer board that core material and outer copper foil are press-fitted together as one by cured sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833027.7A CN109108318A (en) | 2018-07-26 | 2018-07-26 | A kind of boring method improving borehole accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833027.7A CN109108318A (en) | 2018-07-26 | 2018-07-26 | A kind of boring method improving borehole accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109108318A true CN109108318A (en) | 2019-01-01 |
Family
ID=64862232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810833027.7A Pending CN109108318A (en) | 2018-07-26 | 2018-07-26 | A kind of boring method improving borehole accuracy |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112672520A (en) * | 2021-01-14 | 2021-04-16 | 珠海杰赛科技有限公司 | Processing method of crimping hole of circuit board |
| CN114953033A (en) * | 2022-07-28 | 2022-08-30 | 广州添利电子科技有限公司 | Method for mechanically drilling through hole with high aspect ratio |
| CN115157375A (en) * | 2022-06-22 | 2022-10-11 | 昆山镭崴光电科技有限公司 | Through hole drilling process flow method |
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| US7225536B2 (en) * | 2005-04-07 | 2007-06-05 | Ho-Ching Yang | Precasting multi-layer PCB process |
| CN103118486A (en) * | 2013-01-29 | 2013-05-22 | 惠州中京电子科技股份有限公司 | Aluminum based circuit board with component plug holes and manufacturing method of aluminum based circuit board |
| CN103786189A (en) * | 2014-01-21 | 2014-05-14 | 广州兴森快捷电路科技有限公司 | Drilling method for achieving PCB high hole-site precision |
| CN105636357A (en) * | 2016-03-18 | 2016-06-01 | 奥士康科技股份有限公司 | Method for controlling hole position accuracy of back drill hole |
| CN106424802A (en) * | 2016-11-09 | 2017-02-22 | 珠海杰赛科技有限公司 | Processing method for improving drilling hole position accuracy of PCB |
| CN106604546A (en) * | 2016-11-12 | 2017-04-26 | 广东科翔电子科技有限公司 | Printed-circuit board short-slot slotted hole forming method |
| CN206422980U (en) * | 2017-01-23 | 2017-08-18 | 东莞同昌电子有限公司 | Circuit boring fixed structure |
-
2018
- 2018-07-26 CN CN201810833027.7A patent/CN109108318A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7225536B2 (en) * | 2005-04-07 | 2007-06-05 | Ho-Ching Yang | Precasting multi-layer PCB process |
| CN103118486A (en) * | 2013-01-29 | 2013-05-22 | 惠州中京电子科技股份有限公司 | Aluminum based circuit board with component plug holes and manufacturing method of aluminum based circuit board |
| CN103786189A (en) * | 2014-01-21 | 2014-05-14 | 广州兴森快捷电路科技有限公司 | Drilling method for achieving PCB high hole-site precision |
| CN105636357A (en) * | 2016-03-18 | 2016-06-01 | 奥士康科技股份有限公司 | Method for controlling hole position accuracy of back drill hole |
| CN106424802A (en) * | 2016-11-09 | 2017-02-22 | 珠海杰赛科技有限公司 | Processing method for improving drilling hole position accuracy of PCB |
| CN106604546A (en) * | 2016-11-12 | 2017-04-26 | 广东科翔电子科技有限公司 | Printed-circuit board short-slot slotted hole forming method |
| CN206422980U (en) * | 2017-01-23 | 2017-08-18 | 东莞同昌电子有限公司 | Circuit boring fixed structure |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112672520A (en) * | 2021-01-14 | 2021-04-16 | 珠海杰赛科技有限公司 | Processing method of crimping hole of circuit board |
| CN115157375A (en) * | 2022-06-22 | 2022-10-11 | 昆山镭崴光电科技有限公司 | Through hole drilling process flow method |
| CN114953033A (en) * | 2022-07-28 | 2022-08-30 | 广州添利电子科技有限公司 | Method for mechanically drilling through hole with high aspect ratio |
| CN114953033B (en) * | 2022-07-28 | 2023-02-03 | 广州添利电子科技有限公司 | Method for mechanically drilling through hole with high aspect ratio |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190101 |