CN103552125A - Machining method of red rubber sheet through hole - Google Patents
Machining method of red rubber sheet through hole Download PDFInfo
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- CN103552125A CN103552125A CN201310453324.6A CN201310453324A CN103552125A CN 103552125 A CN103552125 A CN 103552125A CN 201310453324 A CN201310453324 A CN 201310453324A CN 103552125 A CN103552125 A CN 103552125A
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- red film
- lubricating oil
- aluminium flake
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Abstract
The invention discloses a machining method of a red rubber sheet through hole. The method includes: placing an aluminum sheet on a base plate; fixing a to-be-machined red rubber sheet on the aluminum sheet; smearing lubricant on the surface of the to-be-machined red rubber sheet; placing another aluminum sheet on the to-be-machined red rubber sheet, and smearing lubricant on the aluminum sheet; drilling the through hole on the to-be-machined red rubber sheet; removing residual lubricant on the red rubber sheet. The method has the advantages that the radiation design introducing the aluminum sheets and lubricant is used, radiation of red rubber sheet drilling is improved, modification, caused by excessive heat, of the red rubber sheet can be avoided, and excellent quality of the red rubber sheet through hole can be guaranteed; due to the enhanced radiation capability, excessive heat of the red rubber sheet can be avoided even drilling speed is increased moderately, low drilling efficiency of traditional red rubber sheet drilling is improved, and red rubber sheet drilling efficiency is increased effectively.
Description
Technical field
The present invention relates to a kind of processing method of red film through hole.
Background technology
In the preparation process of pcb board, the boring contraposition of plate need to be used red film.During due to boring, red film at high temperature easily occurs to go bad, and heat dissipation problem has become the difficulties that red film through hole is made.Be limited to heat dissipation problem, the low and inefficiency of the quality of red film through hole.In addition,, when machining small footpath, the through hole content of red film is prone to burr, burr and the quality problems such as burns.
Prior art is to avoid the generation of the problems referred to above, normally uses low parameter operation instead, and feed velocity declines 50%.The decline of feed velocity, can extend the drilling time of red film undoubtedly, affects manufacturing schedule.
Summary of the invention
In view of this, the present invention, for solving the problems of the technologies described above, provides a kind of processing method of red film through hole, makes the through hole quality of making on red film in this way good, without bad phenomenon such as orifice ring burr, micropore burn, occur, and the make efficiency of through hole is high.
Technical scheme provided by the invention is:
A processing method for red film through hole, is characterized in that, comprising:
On a backing plate, aluminium flake is set;
Red film to be processed is fixed on aluminium flake;
In red film to be processed surface coating lubricating oil;
On red film to be processed, place again an aluminium flake, and in aluminium flake surface coating lubricating oil;
On red film to be processed, drill through hole;
Removing remains in the lubricating oil on red film.
Compare with the processing method of conventional red film through hole, the present invention introduces the heat dissipation design of aluminium flake and lubricating oil cooperation, and the heat that drill bit produces outwards conducts by lubricating oil and aluminium flake, realizes quick heat radiating, has improved the heat dissipation problem of red film boring.Can effectively solve red film because of overheated and rotten problem, guarantee the outstanding quality of red film through hole.In addition, because heat-sinking capability strengthens, suitably improve penetration rate, it is overheated that red film can not occur yet; So just, improve traditional low problem of red film drilling efficiency, effectively improved the drilling efficiency of red film.
The described use amount that spreads upon the lubricating oil on red film to be processed is 15-20 milliliter/0.04 square metre, described in spread upon the lubricating oil on aluminium flake use amount be 5-10 milliliter/0.04 square metre.
Above-mentioned lubricating oil can adopt any lubricating oil on the market.Lubricating oil has the good capacity of heat transmission, is spread upon on red film to be processed and aluminium flake, and the heat that drill bit can be produced outwards transmits, and avoids the appearance of concentration of local heat, arrives outstanding heat dispersion.
Lubricating oil, as the necessary article on pcb board production line, possesses the thermal conduction characteristic of lubricating oil.Due to its application widely, preferably lubricating oil is as the lubricating oil of heat conduction, convenient convenience and with low cost.
In addition, under the encirclement of lubricating oil, the chip producing during bit bore enters in lubricating oil, can prevent dust dusting polluting environment.
Described aluminium flake size and red film to be processed measure-alike; Described aluminium flake thickness is 0.15 ± 0.05 millimeter.
Aluminium has good heat conduction and heat radiation ability, in the top and bottom of red film, is arranged at the large aluminium flakes such as red film, and the heat that is conducted out by lubricating oil is via the further conduction of aluminium flake, and heat is outer reaching in air rapidly.
In addition, because red film is equipped with aluminium flake up and down, when boring, through hole can access the support of aluminium flake, has effectively reduced entrance burr and the outlet property burr of through hole, has promoted the quality of red film through hole.
The described application area of lubricating oil and the Edge Distance of red film spreading upon on red film to be processed is greater than 10 millimeters, described in spread upon the lubricating oil on aluminium flake region and aluminium flake Edge Distance be greater than 20 millimeters; The marginal zone of described red film to be processed is provided with for making itself and backing plate, the fixing fixation kit of aluminium flake; Described fixation kit is the U.S. line glue of band shape that is arranged on red film edge.
In the marginal zone of red film, be provided with for making itself and backing plate, the fixing U.S. line glue of band shape of aluminium flake.Under the viscous effect of U.S. line glue, backing plate, aluminium flake and red film, in conjunction with as a whole, are avoided misplacing when boring, affect red film through hole quality.
Because the marginal zone of red film is provided with banded U.S. line glue, for avoiding the erosion of lubricating oil to make adhesive tape lose viscosity, come off, the application area of described lubricating oil and edge need maintain a certain distance.
Described backing plate flatness error is less than 0.5 micron, and described plate thickness is 2.5 ± 0.3 millimeters, and back plate sizes is identical with red film to be processed.
Be arranged on the backing plate of the bottom, flatness error is less than 0.5 micron, and its size and red film is measure-alike.In addition,, because drill bit still needs to bore forward 1mm through after red film, to guarantee the through-hole aperture self-consistentency of red film, so preferred thickness is the backing plate of 2.5 ± 0.3 millimeters.
Described removing remains in lubricating oil on red film and refers to that the intensity of using that to contain mass concentration be 70% ethanolic solution with 15-20KPa washes away the lubricating oil on red film.
Use 70% ethanol organic solution with the intensity of 15-20KPa, to wash away the lubricating oil remaining on red film, remaining lubricating oil can be removed clean.In addition, use the lubricating oil after this organic solution is cleaned can reclaim to wait to reuse, environmental protection.
Add in described lubricating oil by accounting for the oxolane of 1-2 of its weight percent and the disodium ethylene diamine tetraacetate that accounts for the 1-2 of its weight percent.
In lubricating oil, added after this oxolane, two kinds of medicaments of disodium ethylene diamine tetraacetate, can further strengthen the capacity of heat transmission of lubricating oil, made awl can effectively reduce burr rate under the effect of this lubricating oil.
Compared with prior art, tool of the present invention has the following advantages:
The present invention introduces the heat dissipation design of aluminium flake and lubricating oil cooperation, has improved the heat dissipation problem of red film boring, has solved red film because of overheated and rotten problem, has guaranteed the outstanding quality of red film through hole.In addition, because heat-sinking capability strengthens, suitably improve penetration rate, it is overheated that red film can not occur yet; So just, improve traditional low problem of red film drilling efficiency, effectively improved the drilling efficiency of red film.
The specific embodiment
For the ease of it will be appreciated by those skilled in the art that below in conjunction with embodiment, the present invention is explained in further detail.
Embodiment 1
A processing method for red film through hole, is characterized in that, comprising:
On a backing plate, aluminium flake is set;
Red film to be processed is fixed on aluminium flake;
In red film to be processed surface coating lubricating oil;
On red film to be processed, place again an aluminium flake, and in aluminium flake surface coating lubricating oil;
On red film to be processed, drill through hole;
Removing remains in the lubricating oil on red film.
Compare with the processing method of conventional red film through hole, the present invention introduces the heat dissipation design of aluminium flake and lubricating oil cooperation, and the heat that drill bit produces outwards conducts by lubricating oil and aluminium flake, realizes quick heat radiating, has improved the heat dissipation problem of red film boring.Can effectively solve red film because of overheated and rotten problem, guarantee the outstanding quality of red film through hole.In addition, because heat-sinking capability strengthens, suitably improve penetration rate, it is overheated that red film can not occur yet; So just, improve traditional low problem of red film drilling efficiency, effectively improved the drilling efficiency of red film.
The described use amount that spreads upon the lubricating oil on red film to be processed is 15 milliliters/0.04 square metre, described in spread upon the lubricating oil on aluminium flake use amount be 5 milliliters/0.04 square metre.
Above-mentioned lubricating oil can adopt any lubricating oil on the market.Lubricating oil has the good capacity of heat transmission, is spread upon on red film to be processed and aluminium flake, and the heat that drill bit can be produced outwards transmits, and avoids the appearance of concentration of local heat, arrives outstanding heat dispersion.
Lubricating oil, as the necessary article on pcb board production line, possesses the thermal conduction characteristic of lubricating oil.Due to its application widely, preferably lubricating oil is as the lubricating oil of heat conduction, convenient convenience and with low cost.
In addition, under the encirclement of lubricating oil, the chip producing during bit bore enters in lubricating oil, can prevent dust dusting polluting environment.
Described aluminium flake size and red film to be processed measure-alike; Described aluminium flake thickness is 0.15 millimeter.
Aluminium has good heat conduction and heat radiation ability, in the top and bottom of red film, is arranged at the large aluminium flakes such as red film, and the heat that is conducted out by lubricating oil is via the further conduction of aluminium flake, and heat is outer reaching in air rapidly.
In addition, because red film is equipped with aluminium flake up and down, when boring, through hole can access the support of aluminium flake, has effectively reduced entrance burr and the outlet property burr of through hole, has promoted the quality of red film through hole.
The described application area of lubricating oil and the Edge Distance of red film spreading upon on red film to be processed equals 10 millimeters, described in spread upon the lubricating oil on aluminium flake region and aluminium flake Edge Distance equal 20 millimeters; The marginal zone of described red film to be processed is provided with for making itself and backing plate, the fixing fixation kit of aluminium flake; Described fixation kit is the U.S. line glue of band shape that is arranged on red film edge.
In the marginal zone of red film, be provided with for making itself and backing plate, the fixing U.S. line glue of band shape of aluminium flake.Under the viscous effect of U.S. line glue, backing plate, aluminium flake and red film, in conjunction with as a whole, are avoided misplacing when boring, affect red film through hole quality.
Because the marginal zone of red film is provided with banded U.S. line glue, for avoiding the erosion of lubricating oil to make adhesive tape lose viscosity, come off, the application area of described lubricating oil and edge need maintain a certain distance.
Described backing plate flatness error equals 0.5 micron, and described plate thickness is 2.2 millimeters, and back plate sizes is identical with red film to be processed.
Be arranged on the backing plate of the bottom, flatness error equals 0.5 micron, and its size and red film is measure-alike.In addition,, because drill bit still needs to bore forward 1mm through after red film, to guarantee the through-hole aperture self-consistentency of red film, so preferred thickness is the backing plate of 2.2 millimeters.
Described removing remains in lubricating oil on red film and refers to that the intensity of using that to contain mass concentration be 70% ethanolic solution with 15KPa washes away the lubricating oil on red film.
Use 70% ethanol organic solution with the intensity of 15KPa, to wash away the lubricating oil remaining on red film, remaining lubricating oil can be removed clean.In addition, use the lubricating oil after this organic solution is cleaned can reclaim to wait to reuse, environmental protection.
Add in described lubricating oil by 1 the disodium ethylene diamine tetraacetate that accounts for 1 the oxolane of its weight percent and account for its weight percent.
In lubricating oil, added after this oxolane, two kinds of medicaments of disodium ethylene diamine tetraacetate, can further strengthen the capacity of heat transmission of lubricating oil, made awl can effectively reduce burr rate under the effect of this lubricating oil.
The red film through hole that the present embodiment 1 obtains, the red film through hole making with traditional approach is compared, and aperture is without burr, burr and the quality bad phenomenon such as burn; In addition, because this processing method can obtain potent heat-sinking capability, by improving penetration rate, effectively improve the working (machining) efficiency of through hole, can obtain larger economic well-being of workers and staff.
Embodiment 2
A processing method for red film through hole, is characterized in that, comprising:
On a backing plate, aluminium flake is set;
Red film to be processed is fixed on aluminium flake;
In red film to be processed surface coating lubricating oil;
On red film to be processed, place again an aluminium flake, and in aluminium flake surface coating lubricating oil;
On red film to be processed, drill through hole;
Removing remains in the lubricating oil on red film.
Compare with the processing method of conventional red film through hole, the present invention introduces the heat dissipation design of aluminium flake and lubricating oil cooperation, and the heat that drill bit produces outwards conducts by lubricating oil and aluminium flake, realizes quick heat radiating, has improved the heat dissipation problem of red film boring.Can effectively solve red film because of overheated and rotten problem, guarantee the outstanding quality of red film through hole.In addition, because heat-sinking capability strengthens, suitably improve penetration rate, it is overheated that red film can not occur yet; So just, improve traditional low problem of red film drilling efficiency, effectively improved the drilling efficiency of red film.
The described use amount that spreads upon the lubricating oil on red film to be processed is 20 milliliters/0.04 square metre, described in spread upon the lubricating oil on aluminium flake use amount be 10 milliliters/0.04 square metre.
Above-mentioned lubricating oil can adopt any lubricating oil on the market.Lubricating oil has the good capacity of heat transmission, is spread upon on red film to be processed and aluminium flake, and the heat that drill bit can be produced outwards transmits, and avoids the appearance of concentration of local heat, arrives outstanding heat dispersion.
Lubricating oil, as the necessary article on pcb board production line, possesses the thermal conduction characteristic of lubricating oil.Due to its application widely, preferably lubricating oil is as the lubricating oil of heat conduction, convenient convenience and with low cost.
In addition, under the encirclement of lubricating oil, the chip producing during bit bore enters in lubricating oil, can prevent dust dusting polluting environment.
Described aluminium flake size and red film to be processed measure-alike; Described aluminium flake thickness is 0.2 millimeter.
Aluminium has good heat conduction and heat radiation ability, in the top and bottom of red film, is arranged at the large aluminium flakes such as red film, and the heat that is conducted out by lubricating oil is via the further conduction of aluminium flake, and heat is outer reaching in air rapidly.
In addition, because red film is equipped with aluminium flake up and down, when boring, through hole can access the support of aluminium flake, has effectively reduced entrance burr and the outlet property burr of through hole, has promoted the quality of red film through hole.
The described application area of lubricating oil and the Edge Distance of red film spreading upon on red film to be processed equals 11 millimeters, described in spread upon the lubricating oil on aluminium flake region and aluminium flake Edge Distance equal 22 millimeters; The marginal zone of described red film to be processed is provided with for making itself and backing plate, the fixing fixation kit of aluminium flake; Described fixation kit is the U.S. line glue of band shape that is arranged on red film edge.
In the marginal zone of red film, be provided with for making itself and backing plate, the fixing U.S. line glue of band shape of aluminium flake.Under the viscous effect of U.S. line glue, backing plate, aluminium flake and red film, in conjunction with as a whole, are avoided misplacing when boring, affect red film through hole quality.
Because the marginal zone of red film is provided with banded U.S. line glue, for avoiding the erosion of lubricating oil to make adhesive tape lose viscosity, come off, the application area of described lubricating oil and edge need maintain a certain distance.
Described backing plate flatness error equals 0.4 micron, and described plate thickness is 2.5 millimeters, and back plate sizes is identical with red film to be processed.
Be arranged on the backing plate of the bottom, flatness error equals 0.4 micron, and its size and red film is measure-alike.In addition,, because drill bit still needs to bore forward 1mm through after red film, to guarantee the through-hole aperture self-consistentency of red film, so preferred thickness is the backing plate of 2.5 millimeters.
Described removing remains in lubricating oil on red film and refers to that the intensity of using that to contain mass concentration be 70% ethanolic solution with 17KPa washes away the lubricating oil on red film.
Use 70% ethanol organic solution with the intensity of 17KPa, to wash away the lubricating oil remaining on red film, remaining lubricating oil can be removed clean.In addition, use the lubricating oil after this organic solution is cleaned can reclaim to wait to reuse, environmental protection.
Add in described lubricating oil by 2 the disodium ethylene diamine tetraacetate that accounts for 1 the oxolane of its weight percent and account for its weight percent.
In lubricating oil, added after this oxolane, two kinds of medicaments of disodium ethylene diamine tetraacetate, can further strengthen the capacity of heat transmission of lubricating oil, made awl can effectively reduce burr rate under the effect of this lubricating oil.
The red film through hole that the present embodiment 2 obtains, the red film through hole making with traditional approach is compared, and aperture is without burr, burr and the quality bad phenomenon such as burn; In addition, because this processing method can obtain potent heat-sinking capability, by improving penetration rate, effectively improve the working (machining) efficiency of through hole, can obtain larger economic well-being of workers and staff.
Embodiment 3
A processing method for red film through hole, is characterized in that, comprising:
On a backing plate, aluminium flake is set;
Red film to be processed is fixed on aluminium flake;
In red film to be processed surface coating lubricating oil;
On red film to be processed, place again an aluminium flake, and in aluminium flake surface coating lubricating oil;
On red film to be processed, drill through hole;
Removing remains in the lubricating oil on red film.
Compare with the processing method of conventional red film through hole, the present invention introduces the heat dissipation design of aluminium flake and lubricating oil cooperation, and the heat that drill bit produces outwards conducts by lubricating oil and aluminium flake, realizes quick heat radiating, has improved the heat dissipation problem of red film boring.Can effectively solve red film because of overheated and rotten problem, guarantee the outstanding quality of red film through hole.In addition, because heat-sinking capability strengthens, suitably improve penetration rate, it is overheated that red film can not occur yet; So just, improve traditional low problem of red film drilling efficiency, effectively improved the drilling efficiency of red film.
The described use amount that spreads upon the lubricating oil on red film to be processed is 17 milliliters/0.04 square metre, described in spread upon the lubricating oil on aluminium flake use amount be 8 milliliters/0.04 square metre.
Above-mentioned lubricating oil can adopt any lubricating oil on the market.Lubricating oil has the good capacity of heat transmission, is spread upon on red film to be processed and aluminium flake, and the heat that drill bit can be produced outwards transmits, and avoids the appearance of concentration of local heat, arrives outstanding heat dispersion.
Lubricating oil, as the necessary article on pcb board production line, possesses the thermal conduction characteristic of lubricating oil.Due to its application widely, preferably lubricating oil is as the lubricating oil of heat conduction, convenient convenience and with low cost.
In addition, under the encirclement of lubricating oil, the chip producing during bit bore enters in lubricating oil, can prevent dust dusting polluting environment.
Described aluminium flake size and red film to be processed measure-alike; Described aluminium flake thickness is 0.1 millimeter.
Aluminium has good heat conduction and heat radiation ability, in the top and bottom of red film, is arranged at the large aluminium flakes such as red film, and the heat that is conducted out by lubricating oil is via the further conduction of aluminium flake, and heat is outer reaching in air rapidly.
In addition, because red film is equipped with aluminium flake up and down, when boring, through hole can access the support of aluminium flake, has effectively reduced entrance burr and the outlet property burr of through hole, has promoted the quality of red film through hole.
The described application area of lubricating oil and the Edge Distance of red film spreading upon on red film to be processed equals 13 millimeters, described in spread upon the lubricating oil on aluminium flake region and aluminium flake Edge Distance equal 24 millimeters; The marginal zone of described red film to be processed is provided with for making itself and backing plate, the fixing fixation kit of aluminium flake; Described fixation kit is the U.S. line glue of band shape that is arranged on red film edge.
In the marginal zone of red film, be provided with for making itself and backing plate, the fixing U.S. line glue of band shape of aluminium flake.Under the viscous effect of U.S. line glue, backing plate, aluminium flake and red film, in conjunction with as a whole, are avoided misplacing when boring, affect red film through hole quality.
Because the marginal zone of red film is provided with banded U.S. line glue, for avoiding the erosion of lubricating oil to make adhesive tape lose viscosity, come off, the application area of described lubricating oil and edge need maintain a certain distance.
Described backing plate flatness error equals 0.45 micron, and described plate thickness is 2.8 millimeters, and back plate sizes is identical with red film to be processed.
Be arranged on the backing plate of the bottom, flatness error equals 0.45 micron, and its size and red film is measure-alike.In addition,, because drill bit still needs to bore forward 1mm through after red film, to guarantee the through-hole aperture self-consistentency of red film, so preferred thickness is the backing plate of 2.8 millimeters.
Described removing remains in lubricating oil on red film and refers to that the intensity of using that to contain mass concentration be 70% ethanolic solution with 20KPa washes away the lubricating oil on red film.
Use 70% ethanol organic solution with the intensity of 20KPa, to wash away the lubricating oil remaining on red film, remaining lubricating oil can be removed clean.In addition, use the lubricating oil after this organic solution is cleaned can reclaim to wait to reuse, environmental protection.
Add in described lubricating oil by 2 the disodium ethylene diamine tetraacetate that accounts for 2 the oxolane of its weight percent and account for its weight percent.
In lubricating oil, added after this oxolane, two kinds of medicaments of disodium ethylene diamine tetraacetate, can further strengthen the capacity of heat transmission of lubricating oil, made awl can effectively reduce burr rate under the effect of this lubricating oil.
The red film through hole that the present embodiment 3 obtains, the red film through hole making with traditional approach is compared, and aperture is without burr, burr and the quality bad phenomenon such as burn; In addition, because this processing method can obtain potent heat-sinking capability, by improving penetration rate, effectively improve the working (machining) efficiency of through hole, can obtain larger economic well-being of workers and staff.
Be more than wherein specific implementation of the present invention, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (9)
1. a processing method for red film through hole, is characterized in that, comprises the following steps:
On a backing plate, aluminium flake is set;
Red film to be processed is fixed on aluminium flake;
In red film to be processed surface coating lubricating oil;
On red film to be processed, place again an aluminium flake, and in aluminium flake surface coating lubricating oil;
On red film to be processed, drill through hole;
Removing remains in the lubricating oil on red film.
2. the processing method of red film through hole according to claim 1, it is characterized in that: described in spread upon the lubricating oil on red film to be processed use amount be 15-20 milliliter/0.04 square metre, described in spread upon the lubricating oil on aluminium flake use amount be 5-10 milliliter/0.04 square metre.
3. the processing method of red film through hole according to claim 2, is characterized in that: described aluminium flake size and red film to be processed measure-alike; Described aluminium flake thickness is 0.15 ± 0.05 millimeter.
4. the processing method of red film through hole according to claim 3, it is characterized in that: described in the application area of lubricating oil and the Edge Distance of red film that spread upon on red film to be processed be greater than 10 millimeters, described in spread upon the lubricating oil on aluminium flake region and aluminium flake Edge Distance be greater than 20 millimeters.
5. the processing method of red film through hole according to claim 4, is characterized in that: described backing plate flatness error is less than 0.5 micron, and described plate thickness is 2.5 ± 0.3 millimeters, and back plate sizes is identical with red film to be processed.
6. the processing method of red film through hole according to claim 5, is characterized in that: the marginal zone of described red film to be processed is provided with for making itself and backing plate, the fixing fixation kit of aluminium flake.
7. the processing method of red film through hole according to claim 6, is characterized in that: described removing remains in lubricating oil on red film and refers to that the intensity of using that to contain mass concentration be 70% ethanolic solution with 15-20KPa washes away the lubricating oil on red film.
8. the processing method of red film through hole according to claim 7, is characterized in that: described fixation kit is the U.S. line glue of band shape that is arranged on red film edge.
9. the processing method of red film through hole according to claim 8, is characterized in that: in described lubricating oil, add by accounting for the oxolane of 1-2 of its weight percent and the disodium ethylene diamine tetraacetate that accounts for the 1-2 of its weight percent.
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| CN201310453324.6A CN103552125B (en) | 2013-09-29 | 2013-09-29 | A kind of processing method of red rubber sheet through hole |
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| CN109496078A (en) * | 2018-11-28 | 2019-03-19 | 博罗县鸿源华辉电子有限公司 | A kind of manufacture craft of thickness copper sheet |
| CN109743841A (en) * | 2019-01-08 | 2019-05-10 | 博罗县鸿源华辉电子有限公司 | A kind of processing technology of the PCB substrate without burr |
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| CN107803878B (en) * | 2017-11-28 | 2023-12-15 | 江苏华神电子有限公司 | CCD (charge coupled device) drilling target machine for processing film positioning holes |
| CN109496078A (en) * | 2018-11-28 | 2019-03-19 | 博罗县鸿源华辉电子有限公司 | A kind of manufacture craft of thickness copper sheet |
| CN109743841A (en) * | 2019-01-08 | 2019-05-10 | 博罗县鸿源华辉电子有限公司 | A kind of processing technology of the PCB substrate without burr |
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| CN103552125B (en) | 2016-04-20 |
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