CN109862706B - Circuit board printing process - Google Patents
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- CN109862706B CN109862706B CN201910065125.5A CN201910065125A CN109862706B CN 109862706 B CN109862706 B CN 109862706B CN 201910065125 A CN201910065125 A CN 201910065125A CN 109862706 B CN109862706 B CN 109862706B
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Abstract
The invention discloses a circuit board printing process, which comprises the following process steps: s1: cutting the copper-clad plate into a required size; s2: preprocessing the cut copper-clad plate; s3: carrying out circuit printing on the copper-clad plate after pretreatment through a printing machine; s4: drying the printed copper-clad plate in an ultraviolet drying box; s5: placing the dried copper-clad plate into etching solution for etching; s6: removing the printing film from the copper-clad plate subjected to acid etching; s7: carrying out symbol printing on the copper-clad plate from which the printing film is removed; s8: drilling and positioning the copper-clad plate printed with the symbols; and obtaining a finished product circuit board through the eight steps. The invention has the effect of improving the etching rate.
Description
Technical Field
The invention relates to the technical field of circuit board manufacturing, in particular to a circuit board printing process.
Background
The circuit board printing is to manufacture the copper-clad plate into a circuit board for assembling circuit elements through steps of circuit printing, etching, punching and the like.
The existing circuit board printing process usually comprises the working procedures of cutting a copper plate, pickling, printing, etching, film stripping, drilling and the like, wherein the etching process is to corrode copper foils printed with circuits on a copper-clad plate and only leave the circuits. The etching solution generally used is ferric chloride etching solution, and the ferric chloride and the copper undergo oxidation-reduction reaction to remove all the unnecessary copper by etching. However, since ferric chloride generates a large amount of waste water after etching and requires high treatment cost, copper chloride etching solutions are generally used for etching at present, but the etching rate of the copper chloride etching solutions is too slow and the etching efficiency is too low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a circuit board printing process, cuprous ions in etching solution are oxidized into copper ions in the etching process by adding hydrogen peroxide and an additive, so that the reaction rate is improved.
The above object of the present invention is achieved by the following technical solutions:
a circuit board printing process comprising the process steps of:
s1: cutting the copper-clad plate into a required size;
s2: preprocessing the cut copper-clad plate;
s3: carrying out circuit printing on the copper-clad plate after pretreatment through a printing machine;
s4: drying the printed copper-clad plate by using a drying box;
s5: placing the dried copper-clad plate into etching solution for etching, wherein the etching solution comprises the following components in parts by weight:
s6: removing the printing film from the etched copper-clad plate;
s7: carrying out symbol printing on the copper-clad plate from which the printing film is removed;
s8: drilling and positioning the copper-clad plate coated with the isolation film layer;
and obtaining a finished product circuit board through the eight steps.
By adopting the technical scheme, the copper-clad plate is firstly cut into the processing plates with the same specification from the raw material plate with larger size, and then the oil stains and oxides on the surface of the copper plate are removed through the pretreatment process, so that the surface of the copper plate becomes clean. And then, printing the required circuit on the surface of the copper-clad plate through the manufactured screen printing plate, so that the circuit can be protected from being corroded when the copper plate is etched. Then the ultraviolet rays heat the curing circuit, and the temperature rising block is heated by the ultraviolet rays, so that the oxidation can be reduced. And then, placing the copper-clad plate into etching solution for etching, wherein the copper foil under the circuit is not corroded, and other copper foils on the copper-clad plate are corroded by the etching solution, so that only the required circuit is left on the copper-clad plate. And then washing off the protective film on the circuit on the copper-clad plate after the etching solution is washed off to obtain a semi-finished product circuit board. Then, the necessary symbols are printed on the circuit board, and the isolating film is coated to protect the circuit. And finally, drilling the nodes of the circuit board, which need to be connected with elements.
Copper reacts with copper chloride and concentrated hydrochloric acid in the etching solution to generate cuprous chloride, so that the copper foil on the copper-clad plate except for the circuit is etched and removed. Cuprous chloride in the etched etching solution generates cupric chloride under the oxidation action of hydrogen peroxide, so that the etching solution can be recycled, and the resource utilization rate is improved.
The invention is further configured to: pretreatment liquid is added in the pretreatment in the step S2, and the pretreatment liquid comprises the following components in parts by weight:
by adopting the technical scheme, the sodium dodecyl benzene sulfonate and the coconut oil fatty acid diethanolamide in the pretreatment liquid are used as emulsifiers and have an emulsifying effect on oil stains, and lipophilic groups coat the oil stains to form O/W micelles, so that the oil stains on the surface of a copper-clad plate are dissolved and removed. The secondary alkyl sodium sulfonate is also used as an emulsifier to elute oil stains, and the secondary alkyl sodium sulfonate and the sodium dodecyl benzene sulfonate have good compatibility, so that the emulsifying effect of an emulsifying system can be obviously improved. The acid in the pickling solution is mainly used for dissolving and removing the oxide on the copper surface, so that the oxide is prevented from influencing the cleanness degree of the copper surface.
The invention is further configured to: the additive in the step S5 comprises the following components in percentage by weight:
60-80% of poly-p-ethoxy phenylurea;
10-15% of polyoxyethylene ether;
5-30% of potassium chloride.
By adopting the technical scheme, the poly-p-ethoxy phenylurea and the polyoxyethylene ether form a layer of extremely thin film after meeting the copper surface, the film is disintegrated by spraying, the pressure only acts on the front surface film, the film on the side surface of the circuit is not disintegrated due to small pressure, the circuit is protected, the side corrosion is prevented, the outermost electrons of the copper are accelerated, the copper becomes active, and the oxidation of Cu and Cu is easier+Has obvious acceleration effect.
The invention is further configured to: in the step S5, the spraying pressure of the etching solution is controlled to be 0.2MPa-0.3MPa, and the temperature of the etching solution is controlled to be 50-55 ℃.
By adopting the technical scheme, when the pressure of the etching solution sprayed on the surface of the copper-clad plate is lower than 0.2MPa, the positive pressure of the etching solution on the surface of the copper-clad plate is too low, the corrosion rate of the etching solution on copper is reduced, and when the spraying pressure is higher than 0.3MPa, the positive pressure of the etching solution on the surface of the copper-clad plate is too high, so that the etching solution can disperse a film formed by an additive on the side surface of the circuit in the corrosion process of the copper-clad plate, certain lateral erosion is generated on the circuit, and the integrity of the circuit is influenced. The temperature rise can accelerate the etching rate, but when the temperature is higher than 55 ℃, HCl in the etching solution is excessively volatilized, so that the components of the etching solution are affected and disordered, and the etching effect is poor.
The invention is further configured to: and when the concentration of the hydrochloric acid is lower than 1/2 of the initial addition amount in the etching process of the step S5, adding the hydrochloric acid to 1.3-1.5 times of the initial concentration.
By adopting the technical scheme, hydrochloric acid is consumed due to participation in etching reaction in the etching process, the hydrochloric acid is supplemented to maintain the stability of the etching solution, and the redundant hydrochloric acid can react with Cu2+And Cu+Complex ions are formed to make Cu in solution+The etching rate is reduced, so that the etching rate is increased, and the amount of dissolved copper in the etching solution is improved to a certain extent.
The invention is further configured to: the printing machine comprises a feeding device, and a printing device is arranged on one side of the feeding device;
the feeding device comprises a feeding rack, one side of the feeding rack is provided with a lifting mechanism, a pulling mechanism is arranged on the feeding rack close to the top of the lifting mechanism, and a pressing mechanism is arranged on the feeding rack close to the pulling mechanism;
the lifting mechanism comprises a lifting rod, two ends of the lifting rod are fixedly connected with the feeding rack, a placement rack is slidably mounted on the lifting rod, a first driving motor is mounted on the top wall of the feeding rack, an output shaft of the first driving motor is connected with a first gear, a second gear is mounted on the bottom wall of the feeding rack, a first transmission chain is mounted on the first gear and the second gear, and the first transmission chain is connected with the placement rack;
a positioning frame is arranged on one side, close to the lifting mechanism, of the feeding rack, the pulling mechanism comprises an adjusting assembly, the adjusting assembly comprises an adjusting plate, the adjusting plate is slidably mounted on the positioning frame, a first air cylinder is arranged on one side, close to the feeding rack, of the positioning frame, and a piston rod of the first air cylinder is connected with the adjusting plate; the length of the adjusting plate is greater than the width of the positioning frame, sliding holes are formed in two ends of the adjusting plate, a second air cylinder is mounted on the adjusting plate, a second mounting block is connected to a piston rod of the second air cylinder, adjusting rods are connected to two ends of the mounting block and are connected with the sliding holes in a sliding mode, one end, penetrating through the sliding holes, of each adjusting rod is connected with a drawing assembly, each drawing assembly comprises a sucker, the suckers are connected with the adjusting rods, an air pump is mounted on the feeder frame, an air outlet of the air pump is connected with an air pipe, and one end, far away from the end connected with the air;
pressing means includes the fixed block, the fixed block is installed on the locating rack, first flexible groove has been seted up on the fixed block, slidable mounting has flexible piece in the first flexible groove, install the pressure cylinder on the locating rack, flexible hole has been seted up on the fixed block, flexible hole and first flexible groove intercommunication, the piston rod of pressing the cylinder passes flexible hole and links to each other with flexible piece, the one end that the cylinder links to each other is pressed in keeping away from of flexible piece is connected with the pressure roller.
The invention is further configured to: a swinging mechanism is mounted on the positioning frame and comprises a connecting block, one end of the connecting block is connected with the positioning frame, a swinging arm is mounted at the other end of the connecting block and is hinged with the connecting block, one end of the swinging arm is connected with a piston rod of a swinging cylinder mounted on the positioning frame, and the other end of the swinging arm is rotatably connected with a pressing wheel;
the two ends of the lifting mechanism are provided with limiting assemblies, each limiting assembly comprises a limiting frame, a threaded hole is formed in each limiting frame, a rotating handle is arranged on one side, away from the lifting mechanism, of each limiting frame, a second screw is connected onto each rotating handle, each second screw is in threaded connection with the corresponding threaded hole, and one end, penetrating through the corresponding threaded hole, of each second screw is connected with a limiting plate; the limiting device is characterized in that a third positioning hole is formed in the limiting frame, a positioning support is arranged on one side, away from the lifting mechanism, of the limiting frame, a connecting hole is formed in the positioning support, the second screw rod is connected with the connecting hole in a rotating mode, a second positioning rod is further connected to the positioning support, and the second positioning rod penetrates through the third positioning hole to be connected with the limiting plate.
The invention is further configured to: the positioning mechanism is arranged on the workbench, a first positioning hole is formed in the workbench along the length direction of the workbench, a second positioning hole is formed in the workbench along the width direction of the workbench, a first positioning rod and a second positioning rod are installed in the workbench, a driving piece is installed on the side wall of the workbench and connected with one end of the first positioning rod and one end of the second positioning rod, a positioning block is connected with the other end of the first positioning rod and the other end of the second positioning rod, and the positioning block is connected with the first positioning hole and the second positioning hole in a sliding mode;
the positioning block is detachably arranged on the first positioning rod and the second positioning rod; the positioning block is provided with a second telescopic groove, a spring is installed in the second telescopic groove, one end of the spring is connected with the bottom of the second telescopic groove, the other end of the spring is connected with a clamping block, one end of each of the first positioning rod and the second positioning rod, which is connected with the positioning block, is provided with more than one positioning groove, the positioning block is clamped with the positioning grooves, the side walls of the first positioning rod and the second positioning rod are provided with clamping holes, the clamping holes are communicated with the positioning grooves, and the clamping blocks are clamped with the clamping holes;
install on the workstation and drive actuating cylinder, the piston rod that drives actuating cylinder is connected with first drive piece, the driving piece includes second driving motor, install second driving motor on the first drive piece, be connected with the fifth gear on second driving motor's the output shaft, still install the sixth gear on the first drive piece, first locating lever and second locating lever are kept away from the one end that links to each other with the locating piece and are provided with the dogtooth, first locating lever and second locating lever pass through the dogtooth and mesh with fifth gear and sixth gear mutually.
The invention is further configured to: a hydraulic cylinder is installed on one side of the workbench, a sliding frame is installed on a piston rod of the hydraulic cylinder, a sliding motor is installed on the sliding frame, a sliding groove is formed in the sliding frame, a third gear is installed at one end of the sliding groove, an output shaft of the sliding motor penetrates through the sliding frame to be connected with the third gear, a fourth gear is installed at the other end of the sliding groove, a second transmission chain is installed on the third gear and the fourth gear, a sliding arm is installed in the sliding groove in a sliding mode and connected with the second transmission chain, a driving mechanism is installed at one end, far away from the end connected with the sliding frame, of the sliding arm, and a first scraper and a second scraper are installed on the driving mechanism; a screen plate frame is connected to the sliding frame below the driving mechanism, and a screen plate is installed in the screen plate frame; the first scraper and the second scraper are abutted against the screen printing plate;
the driving mechanism comprises a first cylinder and a second cylinder, the first cylinder and the second cylinder are installed on the sliding arm, a piston rod of the first cylinder and a piston rod of the second cylinder are connected with a second driving block, two ends of the second driving block are connected with driving rods, driving holes matched with the driving rods for use are formed in the sliding arm, and the driving rods penetrate through the driving holes to be connected with the first scraper and the second scraper.
Compared with the prior art, the invention has the beneficial effects that:
1. the additive is added into the etching solution to promote the etching effect of the etching solution and improve the etching rate, and the protective film formed by the poly-p-ethoxy phenylurea in the additive can protect the side edge of the circuit from being corroded and improve the quality of the etched circuit board;
2. adding hydrochloric acid in the etching process to ensure that Cu in the solution2+And Cu+Complex ions are formed, thereby increasing the rate of etching.
Drawings
FIG. 1 is a perspective view of a printing press;
FIG. 2 is a perspective view of the feeding device;
FIG. 3 is a perspective view of the lift mechanism;
FIG. 4 is a perspective view of the table and positioning mechanism;
FIG. 5 is a perspective view of the drive mechanism;
FIG. 6 is a cross-sectional view of the positioning block and the first positioning rod, showing the mounting relationship of the positioning block and the first positioning rod;
fig. 7 is a perspective view of the printing apparatus.
Reference numerals: 1. a feeding device; 11. a feeding frame; 111. a positioning frame; 121. an adjustment assembly; 122. an adjusting plate; 123. a first cylinder; 124. a slide hole; 125. a second cylinder; 126. a second mounting block; 127. adjusting a rod; 13. a lifting mechanism; 131. a lifting rod; 132. a placing frame; 133. a first drive motor; 134. a first gear; 135. a second gear; 136. a first drive chain; 137. a positioning roller; 138. a lifting hole; 15. a drawing assembly; 152. a suction cup; 153. an air tube; 16. a swing mechanism; 161. connecting blocks; 162. a swing arm; 163. a swing cylinder; 164. pressing the wheel; 171. a limiting frame; 172. a threaded hole; 173. rotating the handle; 174. a second screw; 175. a limiting plate; 177. positioning the bracket; 179. a second positioning rod; 2. a printing device; 21. a work table; 211. a positioning mechanism; 212. a first positioning hole; 213. a second positioning hole; 214. a first positioning rod; 216. a drive member; 217. positioning blocks; 22. a telescopic groove; 221. a spring; 222. a clamping block; 223. positioning a groove; 224. a locking hole; 225. a driving cylinder; 226. a first driving block; 227. a second drive motor; 228. a fifth gear; 229. a sixth gear; 23. a convex tooth; 231. a hydraulic cylinder; 232. a sliding frame; 233. a slip motor; 234. a third gear; 235. a fourth gear; 236. a second drive chain; 237. a sliding arm; 24. a drive mechanism; 241. a first scraper; 242. a second scraper; 243. a stencil frame; 244. screen printing; 245. a third cylinder; 246. a fourth cylinder; 247. a second driving block; 248. a drive rod; 249. a drive aperture.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1:
the invention discloses a circuit board printing process, which comprises the following process steps:
s1: cutting the copper-clad plate into a required size;
s2: immersing the cut copper-clad plate into pretreatment liquid for pretreatment, wherein the pretreatment liquid comprises the following components in parts by weight:
s3: carrying out circuit printing on the copper-clad plate after pretreatment through a printing machine;
s4: drying the printed copper-clad plate in an ultraviolet drying box;
s5: placing the dried copper-clad plate into etching solution for etching, controlling the spraying pressure of the etching solution to be 0.2MPa, controlling the temperature of the etching solution to be 50 ℃, and supplementing hydrochloric acid to 1.3 times of the initial concentration when the concentration of the hydrochloric acid is lower than 1/2 of the initial addition amount in the etching process;
the etching solution comprises the following components in parts by weight:
the additive comprises the following components in parts by weight:
60% of poly-p-ethoxy phenylurea;
10% of polyoxyethylene ether;
30% of potassium chloride;
s6: carrying out printing film removal treatment on the etched copper-clad plate by spraying an alkaline solution;
s7: conveying the copper-clad plate with the printing film removed to a symbol printing machine for symbol printing;
s8: drilling and positioning the copper-clad plate printed with the symbols;
and obtaining a finished product circuit board through the eight steps.
Referring to fig. 1, the printing press in step S3 includes a feeding device 1, and a printing device 2 is installed at one side of the feeding device 1.
Referring to fig. 2 and 3, the feeding device 1 includes a feeding frame 11, a lifting mechanism 13 is installed at a feeding end of the feeding frame 11, the lifting mechanism 13 includes a lifting rod 131, two ends of the lifting rod 131 are fixedly connected with the feeding frame 11, a placing frame 132 is installed on the lifting rod 131 in a sliding manner, and more than one placing roller 137 is installed on the placing frame 132 in a rotating manner. The end of the positioning frame 132 connected to the lifting rod 131 is provided with a lifting hole 138, and the lifting rod 131 is connected to the lifting hole 138 in a sliding manner. A first driving motor 133 is installed on the top wall of the feeding rack 11, a first gear 134 is connected to an output shaft of the first driving motor 133, a second gear 135 is installed on the bottom wall of the feeding rack 11, a first transmission chain 136 is installed on the first gear 134 and the second gear 135, and the first transmission chain 136 is connected with the placement rack 132.
Referring to fig. 2 and 3, two ends of the lifting mechanism 13 are provided with limiting assemblies, each limiting assembly comprises a limiting frame 171, one side of each limiting frame 171, which is far away from the lifting mechanism 13, is provided with a positioning frame 177, a connecting hole is formed in each positioning frame 177, one side of each positioning frame 177, which is far away from the lifting mechanism 13, is provided with a rotating handle 173, the rotating handle 173 is connected with a second screw rod 174, a threaded hole 172 is formed in each limiting frame 171, each second screw rod 174 is in threaded connection with the threaded hole 172, and one end, which penetrates through the threaded hole 172, of each second screw rod. A third positioning hole is formed in the limiting frame 171, a second positioning rod 179 is connected to the positioning frame 177, and the second positioning rod 179 penetrates through the third positioning hole to be connected with the limiting plate 175.
Referring to fig. 2 and 3, a positioning frame 111 is mounted at the feeding end of the feeding frame 11, a pulling mechanism is mounted on the positioning frame 111, the pulling mechanism includes an adjusting assembly 121, the adjusting assembly 121 includes an adjusting plate 122, the adjusting plate 122 is slidably mounted on the positioning frame 111, a first air cylinder 123 is mounted on one side of the positioning frame 111 close to the feeding frame 11, and a piston rod of the first air cylinder 123 is connected with the adjusting plate 122; the length of the adjusting plate 122 is greater than the width of the positioning frame 111, sliding holes 124 are formed in two ends of the adjusting plate 122, a second air cylinder 125 is installed on the adjusting plate 122, a piston rod of the second air cylinder 125 is connected with an installing block 126, two ends of the installing block 126 are connected with adjusting rods 127, the adjusting rods 127 are connected with the sliding holes 124 in a sliding mode, and one end, penetrating through the sliding holes 124, of each adjusting rod 127 is connected with the drawing assembly 15.
Referring to fig. 2 and 3, the drawing assembly 15 includes an air pump, the air pump is installed on the feeding frame 11, one end of the adjusting rod 127 far away from the installation block 126 is connected with a suction cup 152, an air outlet of the air pump is connected with an air pipe 153, and one end of the air pipe 153 far away from the end connected with the air pump is communicated with the suction cup 152.
Referring to fig. 2 and 3, the positioning frame 111 is provided with the swing mechanism 16, the swing mechanism 16 includes a connecting block 161, one end of the connecting block 161 is connected to the positioning frame 111, the other end of the connecting block 161 is provided with a swing arm 162, the swing arm 162 is hinged to the connecting block 161, one end of the swing arm 162 is connected to a piston rod of a swing cylinder 163 mounted on the positioning frame 111, and the other end of the swing arm 162 is rotatably connected to a pressing wheel 164.
Referring to fig. 2 and 3, the feeding frame 11 is provided with a pressing mechanism. Pressing means includes the fixed block, and the fixed block is installed on locating rack 111, has seted up flexible groove on the fixed block, and slidable mounting has flexible piece in flexible groove, installs the pressure cylinder on the locating rack 111, has seted up flexible hole on the fixed block, and flexible hole and flexible groove intercommunication, the piston rod of pressing the cylinder pass flexible hole and link to each other with flexible piece, and the one end that keeps away from of flexible piece and press the cylinder and link to each other is connected with the pressure roller.
Referring to fig. 4 and 5, the printing machine further includes a printing device 2 including a table 21, a driving member 216 is disposed inside the table 21, the driving member 216 includes a driving cylinder 225, the driving cylinder 225 is mounted on a side wall of the table 21, a first driving block 226 is connected to a piston rod of the driving cylinder 225, a driving motor 227 is mounted at one end of the first driving block 226, a fifth gear 228 is connected to an output shaft of the driving motor 227, and a sixth gear 229 is further mounted at the other end of the first driving block 226.
Referring to fig. 4 and 5, the table 21 is provided with a first positioning hole 212 along a length direction of the table 21, and the table 21 is provided with a second positioning hole 213 along a width direction of the table 21. The first positioning hole 212 and the second positioning hole 213 are provided with a positioning mechanism 211 therein, the positioning mechanism 211 includes a first positioning rod 214, one end of the first positioning rod 214 is provided with a protruding tooth 23, the first positioning rod 214 is engaged with the second gear 229 via the protruding tooth 23 and the first gear 228, and the other end of the first positioning rod 214 is provided with a positioning block 217.
Referring to fig. 5 and 6, the positioning block 217 is provided with a second telescopic groove 22, a spring 221 is installed in the second telescopic groove 22, one end of the spring 221 is connected with the bottom of the second telescopic groove 22, the other end of the spring 221 is connected with a locking block 222, one end of the first positioning rod 214 connected with the positioning block 217 is provided with more than one positioning groove 223 along the length direction of the first positioning rod 214, the positioning block 217 is clamped with the positioning groove 223, a locking hole 224 is formed in the side wall of the first positioning rod 214, the locking hole 224 is communicated with the positioning groove 223, and the locking block 222 is clamped with the locking hole 224. The positioning block 217 is slidably coupled to the first positioning hole 212 and the second positioning hole 213.
Referring to fig. 7, a hydraulic cylinder 231 is installed at one side of the working table 21, a sliding frame 232 is installed on a piston rod of the hydraulic cylinder 231, a sliding motor 233 is installed on the sliding frame 232, a sliding groove is formed in the sliding frame 232 along the length direction of the sliding frame 232, a third gear 234 is installed at one end of the sliding groove, an output shaft of the sliding motor 233 penetrates through the third gear 234 of the sliding frame 232 to be connected, a fourth gear 235 is installed at the other end of the sliding groove, and a transmission chain 236 is installed on the third gear 234 and the fourth gear 235;
referring to fig. 7, a sliding arm 237 is slidably mounted in the sliding groove, the sliding arm 237 is connected to the transmission chain 236, a driving mechanism 24 is mounted at one end of the sliding arm 237, which is far away from the end connected to the sliding frame 232, the driving mechanism 24 includes a first air cylinder 245 and a second air cylinder 246, the first air cylinder 245 and the second air cylinder 246 are mounted on the sliding arm 237, a second driving block 247 is connected to piston rods of the first air cylinder 245 and the second air cylinder 246, driving rods 248 are connected to two ends of the second driving block 247, a driving hole 249 used in cooperation with the driving rod 248 is formed in the sliding arm 237, the driving rod 248 is slidably connected to the driving hole 249, and one end of the driving rod 248, which passes through the driving hole 249, is connected to a first scraper.
Referring to fig. 7, a screen frame 243 is connected to the sliding frame 232 below the first and second blades 241 and 242, and a screen 244 is installed in the screen frame 243. The first blade 241 and the second blade 242 abut against the screen 244.
The implementation principle is as follows: during feeding, the copper-clad plate is placed on the placing frame 132, then the first driving motor 133 drives the first gear 134 to rotate, the first gear 134 drives the first transmission chain 136 to transmit, the first transmission chain 136 drives the second gear 135 to rotate, and the first transmission chain 136 drives the placing frame 132 to ascend to a height suitable for the picking mechanism to grab the copper-clad plate.
Then the first cylinder 123 is started, a piston rod of the first cylinder 123 drives the adjusting plate 122 to slide along the positioning frame 111, the adjusting plate 122 moves to the upper side of the copper-clad plate, then the second cylinder 125 is started, a piston rod of the second cylinder 125 drives the mounting block 126 to descend, the mounting block 126 drives the adjusting rod 127 to descend along the sliding hole 124, the sucking disc 152 on the adjusting rod 127 is abutted to the surface of the copper-clad plate, then the air pump is started to suck air in the sucking disc 152, so that the sucking disc 152 is tightly connected with the copper-clad plate, then the second cylinder 125 is started, a piston rod of the second cylinder 125 drives the mounting block 126 to ascend, the mounting block 126 drives the adjusting rod 127 to ascend, and the adjusting.
Then, the swing cylinder 163 is started, the piston rod of the swing cylinder 163 pulls one end of the swing arm 162 to swing, the other end of the swing arm 162 also swings and beats the copper-clad plate grabbed by the drawing component 15, so that the copper-clad plate adhered to the copper-clad plate falls off, and the drawing component 15 is guaranteed to only grab one copper-clad plate. Then, the first cylinder 123 is started, and the piston rod of the first cylinder 123 drives the adjusting plate 122 to slide along the positioning frame 111, so that the copper-clad plate is sent to the feeding frame 11. Then the pressing cylinder 144 is started, a piston rod of the pressing cylinder 144 pushes the telescopic block 143 to slide out from the telescopic groove 142, and the telescopic block 143 drives the pressing rod to press the copper-clad plate grabbed on the drawing assembly 15 onto the feeding rack 11. Then the copper-clad plate is driven along the feeding frame 11 to enter the printing step.
After the copper-clad plate enters the workbench 21, the driving cylinder 225 drives the first driving block 226 to ascend, when the first driving block 226 ascends, the first positioning rod 214 and the positioning block 217 extend out of the first positioning hole 212 and the second positioning hole 213, then the driving motor 227 is started, the driving motor 227 drives the first gear 228 to rotate, the first gear 228 rotates to drive the first positioning rod 214 to move, the first positioning rod 214 drives the positioning block 217 to slide in the first positioning hole 212 and the second positioning hole 213, when the positioning block 217 slides, the positioning block 217 pushes the copper-clad plate placed on the workbench 21 to a position which can coincide with the screen printing plate 244.
Then, printing is started, during printing, the hydraulic cylinder 231 drives the sliding frame 232 to descend, the sliding frame 232 drives the screen plate 244 to contact with the surface of the copper-clad plate, then the first air cylinder 245 is started, a piston rod of the first air cylinder 245 drives the second driving block 247 to descend, the second driving block 247 drives the driving rod 248 to slide along the driving hole 249 to descend, the driving rod 248 drives the first scraper 241 to descend, so that the first scraper 241 is abutted against the screen plate 244, then the sliding motor 233 is started, an output shaft of the sliding motor 233 drives the third gear 234 to rotate, the third gear 234 drives the transmission chain 236 to transmit, the transmission chain 236 drives the fourth gear 235 to rotate, the transmission chain 236 simultaneously drives the sliding arm 237 to slide, the sliding arm 237 drives the first scraper 241 to slide, and printing liquid on the screen plate 244 is coated on the copper-clad plate through the screen plate. After the first scraper 241 finishes scraping, the hydraulic cylinder 231 drives the sliding frame 232 to ascend through the piston rod so that the screen printing plate 244 is separated from the copper-clad plate; then, the first air cylinder 245 is started to drive the first scraper 241 to be away from the screen printing plate 244, the second air cylinder 246 is started, the piston rod of the second air cylinder 246 drives the second driving block 247 to ascend, the second driving block 247 drives the driving rod 248 to slide and ascend along the driving hole 249, the driving rod 248 drives the second scraper 242 to ascend, so that the second scraper 242 abuts against the screen printing plate 244, then the sliding motor 233 is started to move the sliding arm 237 back to the initial position, and the second scraper 242 scrapes the printing liquid back to the other end. And finishing printing.
Examples 2-5 differ from example 1 in that the components in the etching solution are in the following table in parts by weight.
Examples 6-9 differ from example 1 in that the components in the precleaning liquid are in parts by weight as given in the following table.
Examples 10-13 differ from example 1 in that the components of the additive are in the following table in weight percent.
| Poly (p-ethoxy) phenylurea | Polyoxyethylene ethers | Potassium chloride | |
| Example 10 | 65 | 12 | 23 |
| Example 11 | 70 | 13 | 17 |
| Example 12 | 75 | 14 | 11 |
| Example 13 | 80 | 15 | 5 |
Comparative example
Comparative example 1 differs from example 1 in that: no additive is added into the etching solution;
comparative example 2 differs from example 1 in that: hydrochloric acid is not supplemented in the etching process;
comparative example 3 differs from example 1 in that: hydrogen peroxide is not added into the etching solution;
detection method
Etch Rate testing
The etching solutions of examples 1-5 and comparative examples 1-2 were prepared, then the reaction temperature was controlled at 50 ℃, and then the sample plate was placed in the etching solution, and hydrochloric acid was not added in the etching process in comparative example 2. And (3) measuring the time of the copper foil on the sample plate except the circuit after being corroded and the appearance of the copper foil in the circuit on the surface of the sample plate after being corroded.
| Examples | Corrosion time(s) |
| Example 1 | 620 |
| Example 2 | 625 |
| Example 3 | 623 |
| Example 4 | 618 |
| Example 5 | 617 |
| Comparative example 1 | 622 |
| Comparative example 2 | 959 |
| Comparative example 3 | 980 |
The phenomenon is as follows: the edges of the copper lines in comparative example 1 were corroded, and the edges of the copper lines in examples 1 to 5 were hardly corroded;
and (4) conclusion: the corrosion time of the examples 1-5 is obviously shorter than that of the comparative examples 2-3, which can be obtained by comparing the examples 1-5 with the comparative examples 2 and 3, and the results prove that the oxidation effect of the hydrogen peroxide added into the etching solution on cuprous ions has an obvious improvement effect on the etching rate, and the addition of hydrochloric acid improves the complexation of hydrochloric acid on the cuprous ions and also has an obvious improvement effect on the etching rate. By comparing the morphology of the copper wire in comparative example 1 with examples 1-5, it can be seen that the edge of the copper wire in comparative example 1 is significantly corroded, demonstrating that the additive plays a significant role in protecting the edge of the copper wire from corrosion.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A circuit board printing process is characterized by comprising the following process steps:
s1: cutting the copper-clad plate into a required size;
s2: preprocessing the cut copper-clad plate;
s3: carrying out circuit printing on the copper-clad plate after pretreatment through a printing machine;
s4: drying the printed copper-clad plate by using a drying box;
s5: placing the dried copper-clad plate into etching solution for etching, wherein the etching solution comprises the following components in parts by weight:
the additive comprises the following components in parts by weight:
60-80% of poly-p-ethoxy phenylurea;
10-15% of polyoxyethylene ether;
5-30% of potassium chloride;
s6: removing the printing film from the etched copper-clad plate;
s7: carrying out symbol printing on the copper-clad plate from which the printing film is removed;
s8: drilling and positioning the copper-clad plate printed with the symbols;
and obtaining a finished product circuit board through the eight steps.
2. A circuit board printing process according to claim 1, wherein: pretreatment liquid is added in the pretreatment in the step S2, and the pretreatment liquid comprises the following components in parts by weight:
3. a circuit board printing process according to claim 1, wherein: in the step S5, the spraying pressure of the etching solution is controlled to be 0.2MPa-0.3MPa, and the temperature of the etching solution is controlled to be 50-55 ℃.
4. A circuit board printing process according to claim 1, wherein: and when the concentration of the hydrochloric acid is lower than 1/2 of the initial addition amount in the etching process of the step S5, adding the hydrochloric acid to 1.3-1.5 times of the initial concentration.
5. A circuit board printing process according to claim 1, wherein: the printing machine comprises a feeding device (1), and a printing device (3) is arranged on one side of the feeding device (1);
the feeding device (1) comprises a feeding rack (11), one side of the feeding rack (11) is provided with a lifting mechanism (13), and a pulling mechanism is arranged on a feeding rack close to the top of the lifting mechanism (13); a pressing mechanism (14) is arranged on the feeding rack close to the pulling mechanism;
the lifting mechanism (13) comprises a lifting rod (131), two ends of the lifting rod (131) are fixedly connected with the feeding rack (11), a placement frame (132) is arranged on the lifting rod (131) in a sliding mode, a first driving motor (133) is arranged on the top wall of the feeding rack (11), an output shaft of the first driving motor (133) is connected with a first gear (134), a second gear (135) is arranged on the bottom wall of the feeding rack (11), a first transmission chain (136) is arranged on the first gear (134) and the second gear (135), and the first transmission chain (136) is connected with the placement frame (132);
a positioning frame (111) is installed on one side, close to the lifting mechanism (13), of the feeding rack (11), the pulling mechanism comprises an adjusting component (121), the adjusting component (121) comprises an adjusting plate (122), the adjusting plate (122) is installed on the positioning frame (111) in a sliding mode, a first air cylinder (123) is installed on one side, close to the feeding rack (11), of the positioning frame (111), and a piston rod of the first air cylinder (123) is connected with the adjusting plate (122); the length of the adjusting plate (122) is greater than the width of the positioning frame (111), sliding holes (124) are formed in two ends of the adjusting plate (122), a second air cylinder (125) is installed on the adjusting plate (122), a second installing block (126) is connected to a piston rod of the second air cylinder (125), adjusting rods (127) are connected to two ends of the second installing block (126), the adjusting rods (127) are connected with the sliding holes (124) in a sliding mode, one end, penetrating through the sliding holes (124), of each adjusting rod (127) is connected with a drawing assembly (15), each drawing assembly (15) comprises a suction cup (152), each suction cup (152) is connected with each adjusting rod (127), an air pump is installed on the feeding rack (11), an air outlet of the air pump is connected with an air pipe (153), and one end, far away from the air pipe (153), connected with the air pump is communicated with each;
pressing means (14) include fixed block (141), install on locating rack (111) fixed block (141), first flexible groove (142) have been seted up on fixed block (141), slidable mounting has flexible piece (143) in first flexible groove (142), install on locating rack (111) and press cylinder (144), flexible hole (145) have been seted up on fixed block (141), flexible hole (145) and first flexible groove (142) intercommunication, the piston rod that presses cylinder (144) passes flexible hole (145) and links to each other with flexible piece (143), the one end that keeps away from that presses cylinder (144) link to each other of flexible piece (143) is connected with and presses pressure roller (146).
6. A circuit board printing process according to claim 5, wherein: a swing mechanism (16) is mounted on the positioning frame (111), the swing mechanism (16) comprises a connecting block (161), one end of the connecting block (161) is connected with the positioning frame (111), a swing arm (162) is mounted at the other end of the connecting block (161), the swing arm (162) is hinged to the connecting block (161), one end of the swing arm (162) is connected with a piston rod of a swing cylinder (163) mounted on the positioning frame (111), and the other end of the swing arm (162) is rotatably connected with a pressing wheel (164);
limiting assemblies are arranged at two ends of the lifting mechanism (13), each limiting assembly comprises a limiting frame (171), a threaded hole (172) is formed in each limiting frame (171), a rotating handle (173) is arranged on one side, away from the lifting mechanism (13), of each limiting frame (171), a second screw (174) is connected onto each rotating handle (173), each second screw (174) is in threaded connection with the corresponding threaded hole (172), and one end, penetrating through the corresponding threaded hole (172), of each second screw (174) is connected with a limiting plate (175); the third locating hole has been seted up on spacing (171), one side that elevating system (13) was kept away from in spacing (171) is provided with locating support (177), the connecting hole has been seted up on locating support (177), second screw rod (174) rotate with the connecting hole and link to each other, still be connected with second locating lever (179) on locating support (177), second locating lever (179) pass the third locating hole and link to each other with limiting plate (175).
7. A circuit board printing process according to claim 5, wherein: the printing device (3) comprises a workbench (21), a positioning mechanism (211) is arranged on the workbench (21), a first positioning hole (212) is formed in the workbench (21) along the length direction of the workbench (21), a second positioning hole (213) is formed in the workbench (21) along the width direction of the workbench (21), a first positioning rod (214) and a second positioning rod (179) are installed in the workbench (21), a driving piece (216) is installed on the side wall of the workbench (21), the driving piece (216) is connected with one ends of the first positioning rod (214) and the second positioning rod (179), the other ends of the first positioning rod (214) and the second positioning rod (179) are connected with a positioning block (217), and the positioning block (217) is connected with the first positioning hole (212) and the second positioning hole (213) in a sliding manner;
the positioning block (217) is detachably arranged on the first positioning rod (214) and the second positioning rod (179); a second telescopic groove (22) is formed in the positioning block (217), a spring (221) is installed in the second telescopic groove (22), one end of the spring (221) is connected with the groove bottom of the second telescopic groove (22), the other end of the spring (221) is connected with a clamping block (222), more than one positioning groove (223) is formed in one end, connected with the positioning block (217), of each of the first positioning rod (214) and the second positioning rod (179), the positioning block (217) is clamped with the positioning groove (223), clamping holes (224) are formed in the side walls of the first positioning rod (214) and the second positioning rod (179), the clamping holes (224) are communicated with the positioning grooves (223), and the clamping block (222) is clamped with the clamping holes (224);
install on workstation (21) and drive actuating cylinder (225), the piston rod that drives actuating cylinder (225) is connected with first driving block (226), driving piece (216) include second driving motor (227), install second driving motor (227) on first driving block (226), be connected with first gear (134) on the output shaft of second driving motor (227), still install second gear (135) on first driving block (226), the one end of keeping away from and linking to each other with locating piece (217) of first locating lever (214) and second locating lever (179) is provided with dogtooth (23), first locating lever (214) and second locating lever (179) are through dogtooth (23) and first gear (134) and second gear (135) mesh mutually.
8. A circuit board printing process according to claim 7, wherein: a hydraulic cylinder (231) is arranged on one side of the workbench (21), a sliding frame (232) is arranged on a piston rod of the hydraulic cylinder (231), a sliding motor (233) is arranged on the sliding frame (232), a sliding groove is arranged on the sliding frame (232), a third gear (234) is installed at one end of the sliding groove, an output shaft of the sliding motor (233) passes through the sliding frame (232) to be connected with the third gear (234), a fourth gear (235) is arranged at the other end of the sliding groove, a second transmission chain (236) is arranged on the third gear (234) and the fourth gear (235), a sliding arm (237) is arranged in the sliding groove in a sliding way, the sliding arm (237) is connected with a second transmission chain (236), a driving mechanism (24) is arranged at one end of the sliding arm (237) far away from the end connected with the sliding frame (232), a first scraper (241) and a second scraper (242) are arranged on the driving mechanism (24); a screen plate frame (243) is connected to the sliding frame (232) below the driving mechanism (24), and a screen plate (244) is installed in the screen plate frame (243); the first scraper (241) and the second scraper (242) are abutted against the screen printing plate (244);
the driving mechanism (24) comprises a first air cylinder (123) and a second air cylinder (125), the first air cylinder (123) and the second air cylinder (125) are installed on the sliding arm (237), piston rods of the first air cylinder (123) and the second air cylinder (125) are connected with a second driving block (247), two ends of the second driving block (247) are connected with driving rods (248), a driving hole (249) matched with the driving rods (248) for use is formed in the sliding arm (237), and the driving rods (248) penetrate through the driving hole (249) to be connected with the first scraper (241) and the second scraper (242).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910065125.5A CN109862706B (en) | 2019-01-24 | 2019-01-24 | Circuit board printing process |
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|---|---|---|---|
| CN201910065125.5A CN109862706B (en) | 2019-01-24 | 2019-01-24 | Circuit board printing process |
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| CN109862706B true CN109862706B (en) | 2020-08-14 |
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| CN110416133B (en) * | 2019-08-28 | 2024-05-31 | 南京信息职业技术学院 | Etching device for manufacturing semiconductor chip and application method thereof |
| CN112135430A (en) * | 2020-09-25 | 2020-12-25 | 刘翠 | Etching device for printed circuit board |
| CN112512223B (en) * | 2020-12-15 | 2022-12-27 | 深圳市瀚鼎电路电子有限公司 | Circuit forming method of circuit board |
| CN118119103B (en) * | 2024-04-30 | 2024-06-25 | 江苏乔科科技有限公司 | Etching device for circuit board |
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| CN101621895B (en) * | 2008-06-30 | 2011-05-25 | 比亚迪股份有限公司 | Manufacture method of soft circuit board |
| JP5443863B2 (en) * | 2009-07-09 | 2014-03-19 | 株式会社Ａｄｅｋａ | Etching composition for copper-containing material and method for etching copper-containing material |
| CN103945660B (en) * | 2013-11-06 | 2017-02-01 | 广东兴达鸿业电子有限公司 | Production technology for multilayer circuit board |
| CN204749470U (en) * | 2015-05-25 | 2015-11-11 | 昆山喜发自动化设备有限公司 | High accuracy LED circuit board screen printing machine |
| EP3184669B1 (en) * | 2015-12-23 | 2018-07-18 | ATOTECH Deutschland GmbH | Etching solution for copper and copper alloy surfaces |
| CN107747094B (en) * | 2017-09-28 | 2020-04-21 | 侯延辉 | Acidic etching solution additive and acidic etching solution |
| CN208263718U (en) * | 2018-05-25 | 2018-12-21 | 东莞市鹏利节能设备有限公司 | PCB circuit board prints drying integral machine |
| CN109049948B (en) * | 2018-09-12 | 2024-04-05 | 南京中电熊猫照明有限公司 | Solder paste printing device and printing method |
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Address after: 321000, 1st floor, building 2, No. 9, Changhe Road, Binhai New Area, Shaoxing City, Zhejiang Province (inside Shaoxing huafangyuan Power Transmission Technology Co., Ltd.) Patentee after: Shaoxing shunhang Electronic Technology Co., Ltd Address before: 312000 Unity Gate of Lihai Town, Binhai New Town, Shaoxing City, Zhejiang Province Patentee before: SHAOXING WEIYI ELECTRIC APPLIANCE Co.,Ltd. |