CN110072342B - A processingequipment for PCB board preparation - Google Patents
A processingequipment for PCB board preparation Download PDFInfo
- Publication number
- CN110072342B CN110072342B CN201910359683.2A CN201910359683A CN110072342B CN 110072342 B CN110072342 B CN 110072342B CN 201910359683 A CN201910359683 A CN 201910359683A CN 110072342 B CN110072342 B CN 110072342B
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- etching
- mixer
- pump
- control valve
- monitor
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- 238000002360 preparation method Methods 0.000 title claims description 4
- 238000005530 etching Methods 0.000 claims abstract description 129
- 239000007788 liquid Substances 0.000 claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 239000003814 drug Substances 0.000 claims description 24
- 230000005484 gravity Effects 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
- H05K3/068—Apparatus for etching printed circuits
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- ing And Chemical Polishing (AREA)
- Weting (AREA)
Abstract
The invention discloses a processing device for manufacturing a PCB (printed Circuit Board), which comprises an etching tank and an air circulation unit, wherein etching liquid is filled in the etching tank; the air circulation unit specifically comprises a first control valve, a first pump and a first mixer; the input end and the output end of the first control valve are respectively communicated with the outside and the inside of the etching tank and are used for introducing air into the etching tank; the first pump is immersed in the etching liquid; the first end of the first mixer is connected with the output end of the first pump, the second end of the first mixer is communicated with the interior of the etching tank and is used for sucking air at negative pressure, and the third end of the first mixer is communicated with the etching tank through a conduit. According to the invention, the etching solution in the whole etching groove participates in the reaction, so that the etching reaction is more uniform, each PCB works in the same environment, and the quality difference between the PCB plates is reduced.
Description
Technical Field
The invention belongs to the technical field of PCB processing and manufacturing, and particularly relates to a processing device for manufacturing a PCB.
Background
In the manufacturing process of the PCB, an etching groove is needed, and the chemical reaction principle in the etching groove is specifically as follows:
it can be seen that during the etching operation, new sub-liquid is continuously introduced and the air is sucked by the air suction system to supplement O because the production plate sequentially enters the etching tank to react 2 . In the processing device in the prior art, the new sub-liquid is controlled to be added to one position in the tank according to the specific gravity signal and the design difference value by detecting the specific gravity of the liquid medicine, and slowly diffused to other positions of the etching tank by circulation, so that different positions are caused, and the concentration is different in the adding process and the stopping process. The switching state of the exhaust valve is controlled by detecting the PH value, so that the instantaneous concentration fluctuation of the switch is large; the etching tank is not provided with a device for mixing air and sub-liquid, and the problem of insufficient reaction exists only by the contact of the liquid surface and the air, and the fluctuation of the time rate is large. All of the above 3 modes can lead to different etching operation platesThe time period has large fluctuation and poor yield.
Disclosure of Invention
In order to solve the problems, the invention provides the processing device for manufacturing the PCB, which ensures that etching liquid in the whole etching tank participates in the reaction, so that the etching reaction is more uniform, each PCB works in the same environment, and the quality difference between the PCB plates is reduced.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a processingequipment for PCB board preparation includes:
an etching tank, wherein etching liquid is filled in the etching tank;
the air circulation unit, the air circulation unit specifically includes:
the input end and the output end of the first control valve are respectively communicated with the outside and the inside of the etching tank and are used for introducing air into the etching tank;
a first pump immersed in the etching liquid;
the first end of the first mixer is connected with the output end of the first pump, the second end of the first mixer is communicated with the interior of the etching tank and is used for sucking air under negative pressure, and the third end of the first mixer is communicated with the etching tank through a guide pipe.
Preferably, the first control valve is a proportional electric butterfly valve.
Preferably, the air circulation unit further comprises a PH monitor, wherein the PH monitor is used for monitoring the PH value of the etching solution in real time, and the output end of the PH monitor is connected with the control end of the first control valve.
Preferably, the PH monitor is located outside the etching bath, the processing device for manufacturing the PCB further comprises a third pump, the third pump is immersed in the etching liquid, the output end of the third pump is connected with the input end of the PH monitor, and the output end of the PH monitor is communicated with the etching bath through a guide pipe.
Preferably, the processing device for manufacturing the PCB further comprises a liquid medicine supplementing unit, wherein the liquid medicine supplementing unit comprises a second pump, a second control valve and a second mixer;
the second pump is immersed in the etching liquid;
the input end of the second control valve is used for being connected with a container containing the replenishing liquid medicine;
the first end of the second mixer is connected with the output end of the second pump, the second end of the second mixer is connected with the output end of the second control valve, and the third end of the second mixer is communicated with the etching tank through a conduit.
Preferably, the liquid medicine replenishing unit further comprises a specific gravity monitor, wherein the specific gravity monitor is used for monitoring a set parameter of etching liquid in the etching tank, and the output end of the specific gravity monitor is connected with the control end of the second control valve.
Preferably, the processing device for manufacturing the PCB further comprises a circulation pipe, wherein a plurality of through holes are formed in the circulation pipe, the through holes are formed in the etching solution, and one end of the through holes is communicated with a conduit connected with the second mixer.
Preferably, the first mixer and the second mixer are venturi mixers, and the first end and the third end of the first mixer and the second mixer are opposite, and the second end of the first mixer and the third mixer are located between the first end and the third end.
Preferably, the second control valve is a solenoid valve.
Compared with the prior art, the invention has the beneficial effects that:
according to the processing device for manufacturing the PCB, the PH monitor is used for controlling the opening of the first control valve, the fine adjustment opening of the first control valve reduces fluctuation of liquid medicine, the first pump is used for feeding etching liquid into the first mixer, meanwhile, the first mixer is used for sucking air in a negative pressure mode, so that the air and the etching liquid are fully mixed in the first mixer and finally fed into the etching groove, all the etching liquid participate in reaction, etching reaction is more uniform, each piece of PCB works in the same environment, and quality difference between pieces is reduced.
According to the processing device for manufacturing the PCB, the etching liquid is fed into the second mixer through the second pump, meanwhile, the second mixer is used for sucking and supplying the liquid medicine in a negative pressure mode, and the liquid medicine is mixed and then dispersed into the etching groove, so that the liquid medicine is rapidly diffused into the etching groove, and concentration differences among different positions in the etching groove are reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of a processing apparatus according to an embodiment of the present invention;
wherein: 1-etching tank, 2-first control valve, 3-first pump, 4-first mixer, 5-etching solution, 6-PH monitor, 7-third pump, 8-second pump, 9-second control valve, 10-second mixer, 11-specific gravity monitor, 12-circulating pipe, 13-container.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
Example 1
The embodiment of the invention provides a processing device for manufacturing a PCB, which comprises an etching tank 1 and an air circulation unit;
the etching tank 1 is of a closed structure, and etching liquid 5 is filled in the etching tank; the etching tank 1 is the etching tank 1 commonly used in the prior art, and the structure of the etching tank 1 in the prior art is not improved, so that the specific structure of the etching tank 1 is not repeated;
the air circulation unit specifically includes: a first control valve 2, a first pump 3 and a first mixer 4;
the input end of the first control valve 2 is connected with the outside of the etching tank 1, and the output end of the first control valve is communicated with the inside of the etching tank 1 and is used for introducing air into the etching tank 1; in a preferred implementation of the present embodiment, the first control valve 2 is a proportional electric butterfly valve;
the first pump 3 is immersed in the etching liquid 5;
the first end of the first mixer 4 is connected with the output end of the first pump 3, the second end of the first mixer is communicated with the interior of the etching tank 1 and is used for sucking air at a negative pressure, and the third end of the first mixer is communicated with the etching tank 1 through a conduit, namely, the mixing of the etching liquid 5 mixed with air and the etching liquid 5 not mixed with air is realized; preferably, the first mixer 4 is a venturi mixer, the first end and the third end of the first mixer 4 are disposed opposite to each other, and the second ends thereof are located between the first end and the third end.
Further, in a preferred implementation manner of the embodiment of the present invention, the air circulation unit further includes a PH monitor 6, where the PH monitor 6 is configured to monitor the PH value of the etching solution 5 in real time, and an output end of the PH monitor is connected to a control end of the first control valve 2; more preferably, the PH monitor 6 is disposed outside the etching bath 1, the processing device for PCB board manufacturing further includes a third pump 7, the third pump 7 is immersed in the etching solution 5, an output end of the third pump is connected with an input end of the PH monitor 6, and an output end of the PH monitor 6 is communicated with the etching bath 1 through a conduit, so as to return the etching solution 5 into the etching bath 1.
In summary, the working principle of the processing device for manufacturing the PCB in this embodiment is specifically as follows:
the PH value of the etching solution 5 in the etching tank 1 is monitored in real time by utilizing a PH monitor 6, and the first control valve 2 carries out opening adjustment based on the output value of the PH monitor 6 so as to realize accurate control of the PH value; to ensure O in the air 2 The method comprises the steps of effectively contacting with the etching solution 5 in the etching tank 1, feeding the etching solution 5 into the first mixer 4 by the first pump 3, sucking air in the etching tank 1 by the first mixer 4 under negative pressure, fully mixing the etching solution 5 with the air by the first mixer 4, pumping the etching solution 5 by a guide pipe, and continuously mixing gas and liquid to lift O in the air 2 Mixing effect with the etching liquid 5.
Example 2
The difference between this embodiment and embodiment 1 is that the processing device for PCB manufacturing further includes a liquid medicine adding unit, which includes a second pump 8, a second control valve 9, and a second mixer 10;
the second pump 8 is immersed in the etching liquid 5;
the input end of the second control valve 9 is used for being connected with a container 13 containing the replenishing liquid medicine; preferably, the second control valve 9 is a solenoid valve;
the first end of the second mixer 10 is connected with the output end of the second pump 8, the second end of the second mixer is connected with the output end of the second control valve 9, and the third end of the second mixer is communicated with the etching tank 1 through a conduit; preferably, the second mixer 10 is a venturi mixer, the first end and the third end of the second mixer 10 are disposed opposite to each other, and the second ends thereof are located between the first end and the third end
In a specific implementation manner of the embodiment of the invention, the liquid medicine replenishing unit further comprises a specific gravity monitor 11, wherein the specific gravity monitor 11 is used for monitoring the specific gravity of the liquid medicine of the etching solution 5 in the etching tank 1, and the output end of the liquid medicine replenishing unit is connected with the control end of the second control valve 9; more preferably, the specific gravity monitor 11 is located outside the etching chamber 1 and is sequentially connected to the PH monitor 6, and the etching solution 5 outputted from the third pump 7 is sequentially fed into the etching chamber 1 through the PH monitor 6 and the specific gravity monitor 11 and then through a conduit.
To sum up: the working principle of the processing device for manufacturing the PCB in the embodiment of the invention is as follows:
the PH value of the etching solution 5 in the etching tank 1 is monitored in real time by utilizing a PH monitor 6, and the first control valve 2 carries out opening adjustment based on the output value of the PH monitor 6 so as to realize accurate control of the PH value; to ensure O in the air 2 The method comprises the steps of effectively contacting with the etching solution 5 in the etching tank 1, feeding the etching solution 5 into the first mixer 4 by the first pump 3, sucking air in the etching tank 1 by the first mixer 4 under negative pressure, fully mixing the etching solution 5 with the air by the first mixer 4, pumping the etching solution 5 by a guide pipe, and continuously mixing gas and liquid to lift O in the air 2 A mixing effect with the etching liquid 5;
meanwhile, the specific gravity of the liquid medicine of the etching solution 5 is monitored in real time by utilizing the specific gravity monitor 11, and the opening and closing actions of the second control valve 9 are controlled according to the specific numerical value of the specific gravity of the liquid medicine (when the specific gravity of the liquid medicine is higher than a set value, the second control valve 9 is opened, otherwise, the second control valve 9 is closed);
when the specific gravity of the liquid medicine of the etching liquid is detected to be higher than a set value, the second control valve 9 is opened, the etching liquid 5 is fed into the second mixer 10 by the second pump 8, meanwhile, the replenishing liquid medicine (namely etching sub-liquid) is sucked in by the second mixer 10 under negative pressure, then the etching liquid 5 and the replenishing liquid medicine are fully mixed by the second mixer 10, and then the etching liquid 5 is pumped into the etching liquid 5 by a guide pipe, so that the specific gravity of the etching liquid 5 is accurately controlled.
Example 3
The processing device for manufacturing the PCB further comprises a circulating pipe 12, wherein a plurality of through holes are formed in the circulating pipe 12 and are arranged in the etching liquid 5, and one end of each through hole is communicated with a guide pipe connected with the second mixer 10 so as to ensure that the concentration of the etching liquid 5 in each position in the etching tank 1 is uniform.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A processingequipment for PCB board preparation, characterized by comprising:
an etching tank, wherein etching liquid is filled in the etching tank;
the air circulation unit, the air circulation unit specifically includes:
the input end and the output end of the first control valve are respectively communicated with the outside and the inside of the etching tank and are used for introducing air into the etching tank;
a first pump immersed in the etching liquid;
first oneThe first end of the first mixer is connected with the output end of the first pump, the second end of the first mixer is communicated with the interior of the etching tank and is used for sucking air at negative pressure, the third end of the first mixer is communicated with the etching tank through a conduit, and etching liquid is pumped into the first mixer through the conduit so as to continuously perform O in the air 2 Mixing with etching solution;
the air circulation unit further comprises a PH monitor, wherein the PH monitor is used for monitoring the PH value of the etching solution in real time, and the output end of the PH monitor is connected with the control end of the first control valve; the first control valve adjusts the opening based on the output value of the PH monitor so as to realize the accurate control of the PH value;
the PH monitor is positioned at the outer side of the etching groove, the processing device for manufacturing the PCB further comprises a third pump, the third pump is immersed in the etching liquid, the output end of the third pump is connected with the input end of the PH monitor, and the output end of the PH monitor is communicated with the etching groove through a guide pipe;
the etching liquid in the whole etching groove participates in the reaction, so that the etching reaction is more uniform.
2. The processing device for manufacturing a PCB board according to claim 1, wherein the first control valve is a proportional electric butterfly valve.
3. A processing device for PCB fabrication according to any of claims 1-2, further comprising a liquid medicine replenishing unit comprising a second pump, a second control valve and a second mixer;
the second pump is immersed in the etching liquid;
the input end of the second control valve is used for being connected with a container containing the replenishing liquid medicine;
the first end of the second mixer is connected with the output end of the second pump, the second end of the second mixer is connected with the output end of the second control valve, and the third end of the second mixer is communicated with the etching tank through a conduit.
4. A processing device for PCB fabrication according to claim 3, wherein: the liquid medicine replenishing unit also comprises a specific gravity monitor, wherein the specific gravity monitor is used for monitoring a set parameter of etching liquid in the etching tank, and the output end of the liquid medicine replenishing unit is connected with the control end of the second control valve.
5. A processing device for PCB fabrication according to claim 3, wherein: the processing device for manufacturing the PCB further comprises a circulating pipe, wherein a plurality of through holes are formed in the circulating pipe, the through holes are formed in the etching liquid, and one end of the through holes are communicated with a guide pipe connected with the second mixer.
6. A processing device for PCB fabrication according to claim 3, wherein: the first mixer and the second mixer are venturi mixers, the first end and the third end of the first mixer and the second mixer are arranged oppositely, and the second end of the first mixer and the second mixer are located between the first end and the third end.
7. A processing device for PCB fabrication according to claim 3, wherein: the second control valve is an electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910359683.2A CN110072342B (en) | 2019-04-30 | 2019-04-30 | A processingequipment for PCB board preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910359683.2A CN110072342B (en) | 2019-04-30 | 2019-04-30 | A processingequipment for PCB board preparation |
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| Publication Number | Publication Date |
|---|---|
| CN110072342A CN110072342A (en) | 2019-07-30 |
| CN110072342B true CN110072342B (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910359683.2A Active CN110072342B (en) | 2019-04-30 | 2019-04-30 | A processingequipment for PCB board preparation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0959780A (en) * | 1995-08-23 | 1997-03-04 | Hitachi Cable Ltd | Electroless plating method and electroless plating device |
| CN1712567A (en) * | 2004-06-25 | 2005-12-28 | 长濑产业株式会社 | Regeneration device and method for acid etching liquid |
| CN106793531A (en) * | 2017-01-22 | 2017-05-31 | 柏承科技(昆山)股份有限公司 | Novel evacuated etching machine and the PCB manufacturing process using the vacuum etch machine |
| CN208572572U (en) * | 2018-07-23 | 2019-03-01 | 东莞宇宙电路板设备有限公司 | Etching solution monitoring device and etching machines with the etching solution monitoring device |
| CN210469910U (en) * | 2019-04-30 | 2020-05-05 | 昆山沪利微电有限公司 | A processingequipment for PCB board preparation |
-
2019
- 2019-04-30 CN CN201910359683.2A patent/CN110072342B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0959780A (en) * | 1995-08-23 | 1997-03-04 | Hitachi Cable Ltd | Electroless plating method and electroless plating device |
| CN1712567A (en) * | 2004-06-25 | 2005-12-28 | 长濑产业株式会社 | Regeneration device and method for acid etching liquid |
| CN106793531A (en) * | 2017-01-22 | 2017-05-31 | 柏承科技(昆山)股份有限公司 | Novel evacuated etching machine and the PCB manufacturing process using the vacuum etch machine |
| CN208572572U (en) * | 2018-07-23 | 2019-03-01 | 东莞宇宙电路板设备有限公司 | Etching solution monitoring device and etching machines with the etching solution monitoring device |
| CN210469910U (en) * | 2019-04-30 | 2020-05-05 | 昆山沪利微电有限公司 | A processingequipment for PCB board preparation |
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| Publication number | Publication date |
|---|---|
| CN110072342A (en) | 2019-07-30 |
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