CN118039731A - Battery piece and preparation method thereof - Google Patents
Battery piece and preparation method thereof Download PDFInfo
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- CN118039731A CN118039731A CN202410081920.4A CN202410081920A CN118039731A CN 118039731 A CN118039731 A CN 118039731A CN 202410081920 A CN202410081920 A CN 202410081920A CN 118039731 A CN118039731 A CN 118039731A
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- Prior art keywords
- battery
- battery piece
- copper layer
- grid line
- copper
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- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052802 copper Inorganic materials 0.000 claims abstract description 34
- 239000010949 copper Substances 0.000 claims abstract description 34
- 239000003054 catalyst Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000012190 activator Substances 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 229910052709 silver Inorganic materials 0.000 claims abstract description 9
- 239000004332 silver Substances 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 238000000151 deposition Methods 0.000 claims abstract description 6
- 230000003197 catalytic effect Effects 0.000 claims abstract description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000012670 alkaline solution Substances 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 229920002120 photoresistant polymer Polymers 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 claims description 4
- 229940074439 potassium sodium tartrate Drugs 0.000 claims description 4
- 235000011006 sodium potassium tartrate Nutrition 0.000 claims description 4
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 claims description 4
- 150000002940 palladium Chemical class 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims 5
- 239000011247 coating layer Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 abstract description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006555 catalytic reaction Methods 0.000 abstract description 3
- 229910001431 copper ion Inorganic materials 0.000 abstract description 3
- 238000009713 electroplating Methods 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 239000010703 silicon Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 229910052763 palladium Inorganic materials 0.000 abstract description 2
- 230000008719 thickening Effects 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910000365 copper sulfate Inorganic materials 0.000 description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007650 screen-printing Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- PEVJCYPAFCUXEZ-UHFFFAOYSA-J dicopper;phosphonato phosphate Chemical compound [Cu+2].[Cu+2].[O-]P([O-])(=O)OP([O-])([O-])=O PEVJCYPAFCUXEZ-UHFFFAOYSA-J 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical group [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 229940116318 copper carbonate Drugs 0.000 description 1
- GEZOTWYUIKXWOA-UHFFFAOYSA-L copper;carbonate Chemical compound [Cu+2].[O-]C([O-])=O GEZOTWYUIKXWOA-UHFFFAOYSA-L 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011549 displacement method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 1
- 239000001433 sodium tartrate Substances 0.000 description 1
- 229960002167 sodium tartrate Drugs 0.000 description 1
- 235000011004 sodium tartrates Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- NCPXQVVMIXIKTN-UHFFFAOYSA-N trisodium;phosphite Chemical group [Na+].[Na+].[Na+].[O-]P([O-])[O-] NCPXQVVMIXIKTN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to a battery piece and a preparation method thereof, wherein the preparation method of the battery piece comprises the following steps: s1, spraying a catalytic activator on the surface of a pretreated battery piece to form a catalyst coating; s2, depositing a copper layer on the catalyst coating in the step S1; s3, forming a grid line on the copper layer in the step S2. According to the invention, a chemical replacement method is utilized, copper ions in the solution are replaced and deposited on the surface of the battery piece silicon under the catalysis of metal palladium or metal silver, so that a thin conductive layer is formed, and the conductive wire is obtained by thickening in an electroplating manner, so that the productivity of the battery piece is improved and the cost is saved.
Description
Technical Field
The invention relates to the technical field of electronic device manufacturing, in particular to a battery piece and a preparation method thereof.
Background
In the manufacturing process of electronic devices, the conductive layer is printed mainly by utilizing a conductive silver paste screen printing plate-making process, and the specific conductive silver paste screen printing plate-making steps are as follows:
1. And (3) drying: after printing is completed, the substrate needs to be dried to remove any residual organic solvent or moisture, ensure that the conductive silver paste is firmly attached to the substrate, and have good conductive properties.
2. Curing: for further curing the conductive silver paste, it may be performed by heat treatment or ultraviolet irradiation. The heat treatment can be carried out under the high temperature condition, and the organic matters in the conductive silver paste are volatilized by utilizing heat energy, so that the silver particles are more tightly combined with the substrate. The ultraviolet irradiation excites the photosensitizer by ultraviolet light and cures the conductive silver paste by chemical reaction.
As can be seen from the above description, the prior art generally uses screen printing silver paste and then forms a metal electrode by high-temperature or low-temperature sintering to lead out photo-generated carriers, which is the most widely used metallization method of crystalline silicon solar cells at present. The method has simple process and is the main flow mass production process at present.
In recent years, silicon wafer and battery processes are continuously developed, the production cost of solar cells is continuously reduced, the proportion of the cost of expensive silver paste in the whole battery cost is continuously increased, and the width and the aspect ratio of silver electrodes are limited by the screen printing process, so that the further improvement of the battery efficiency is hindered.
Disclosure of Invention
Aiming at the defects of the prior art, the invention discloses a battery piece and a preparation method thereof.
The technical scheme adopted by the invention is as follows:
the preparation method of the battery piece comprises the following steps:
S1, spraying a catalytic activator on the surface of a pretreated battery piece to form a catalyst coating;
s2, depositing a copper layer on the catalyst coating in the step S1;
S3, forming a grid line on the copper layer in the step S2.
In one embodiment of the invention, in step S1, the content of the catalyst activator is 10g/L to 20g/L; the catalyst activator comprises one of palladium salt, silver and silver salt dissolved in an alkaline solution, and the pH value of the alkaline solution is 9.8-10.5.
In one embodiment of the invention, in step S2, a copper layer of a target thickness is deposited using electroless copper plating with a potassium sodium tartrate system.
In one embodiment of the present invention, after the end of step S1, the catalyst coated battery sheet is washed at least once.
In one embodiment of the present invention, in step S3, the battery piece with the copper layer deposited in step S2 is coated with a photoresist, the gate line to be electroplated is exposed, the gate line is developed under the action of a developing solution, and the gate line is electroplated.
In one embodiment of the present invention, after the end of step S2, the battery sheet on which the copper layer is deposited is subjected to at least one post-cleaning drying treatment.
In one embodiment of the invention, in step S1, the pretreatment includes acid washing and water washing.
In one embodiment of the invention, the acid washing is to wash the surface of the battery piece by hydrofluoric acid with the volume concentration of 10% -30%, and the washing time is 5min-15min.
In one embodiment of the present invention, the method further includes step S4, where the battery piece with the grid line formed in step S3 is subjected to at least one cleaning and then drying treatment.
The invention also provides a battery piece, which is prepared by the preparation method of the battery piece.
Compared with the prior art, the technical scheme of the invention has the following advantages:
According to the preparation method of the battery piece, disclosed by the invention, copper ions in the solution are subjected to displacement deposition on the surface of the silicon of the battery piece under the catalysis of metal palladium, silver or silver salt by using a chemical displacement method, so that a thin conductive layer is formed, the thickness is generally 30-100 nm, and the conductive wire is obtained by thickening in an electroplating manner.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
Fig. 1 is a flowchart of a method of manufacturing a battery sheet according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1, a method for manufacturing a battery sheet includes the steps of:
S1, spraying a catalytic activator on the surface of a pretreated battery piece to form a catalyst coating;
s2, depositing a copper layer on the catalyst coating in the step S1;
S3, forming a grid line on the copper layer in the step S2.
The embodiment provides a preparation method of a battery piece, which can rapidly deposit a metal layer on the surface of the battery piece by using a chemical method, can realize flow sheet type production, improves productivity and saves cost.
In this example, in step S1, the content of the catalyst activator was 10g/L; the catalyst activator comprises palladium salt dissolved in alkaline solution, the pH value of the alkaline solution is 9.8-10.5, and the catalysis is prepared for the deposition in the subsequent step S2, so that copper ions can be replaced. Compared with the traditional brushing or soaking modes and the like, the method for spraying the catalytic activator on the surface of the battery piece can achieve the coating of the surface catalyst coating more efficiently by the spraying technology, and the catalyst coating is more uniform. It should be noted that the catalyst activator may also be one of silver and silver salt dissolved in an alkaline solution, so long as the preset content of the catalyst activator and the required pH value are satisfied.
In this embodiment, in step S1, the pretreatment includes acid washing and water washing. Specifically, the acid washing is to wash the surface of the battery piece by hydrofluoric acid with the volume concentration of 10% -30%, the washing time is 5-15 min, and the main purpose is to remove oxides and the like on the surface of the battery piece. Subsequently, the battery sheet was cleaned with pure water.
Further, after the end of step S1, the battery sheet on which the catalyst coating is formed is washed at least once.
In this embodiment, in step S2, a copper layer of a target thickness is deposited using electroless copper plating solution in a sodium tartrate system. Wherein, the potassium sodium tartrate system comprises the following components in volume concentration: 40% of potassium sodium tartrate (EDTA), 10% of cupric ion solution, 5% of reducing agent and 45% of water.
Further, after the step S2 is completed, the battery piece on which the copper layer is deposited is subjected to at least one cleaning and drying treatment.
In this embodiment, in step S3, the photoresist is coated on the battery piece with the copper layer deposited in step S2, the grid line to be electroplated is exposed by using an exposure machine, the grid line is developed under the action of the developing solution, and the grid line is electroplated.
Specifically, a commercially available positive photoresist can be selected, and a layer of uniform photoresist is sprayed on the surface of the battery piece under the action of a spraying machine to form a photoresist layer, wherein the thickness of the photoresist layer is 10 mu m.
The electroplated copper is an electroplating solution in one of a copper sulfate system, a copper pyrophosphate system and an alkaline copper plating system, and the copper layer of the grid line is thickened to 10 mu m under the current density of 10 ASD. Wherein the copper sulfate system comprises the following concentration components: 200g/L of copper sulfate, 200g/L of sulfuric acid, 60ppm of chloride ions, 1mL/L of gloss agent, 100mL/L of leveling agent and water as solvent; the copper pyrophosphate system included the following concentrations of components: 200g/L of copper pyrophosphate, 200g/L of sulfuric acid, 60ppm of chloride ions, 1mL/L of gloss agent, 100mL/L of leveling agent and water as solvent; the alkaline copper plating system includes the following concentration components: 200g/L of basic copper carbonate, 200g/L of complexing agent, 30g/L of reducing agent, 0.3g/L of conductive salt, 1mL/L of gloss agent and water as solvent. Wherein the reducing agent is sodium phosphite, the conductive salt is potassium carbonate, potassium nitrate or potassium hydroxide, and the gloss agent is sodium thiosulfate or furan. Specifically, in this embodiment, a plating solution of a copper sulfate system may be used.
In this embodiment, the method further includes step S4, where the battery piece with the grid line formed in step S3 is subjected to at least one cleaning and then drying treatment.
Example two
The first difference from the example is that in step S1, the content of the catalyst activator was 12g/L.
The remaining preparation steps are the same as those provided in example one and will not be described in detail here.
Example III
A difference from the examples is that in step S1, the content of the catalyst activator is 15g/L
The remaining preparation steps are the same as those provided in example one and will not be described in detail here.
Example IV
A difference from the examples is that in step S1, the content of the catalyst activator is 20g/L
The remaining preparation steps are the same as those provided in example one and will not be described in detail here.
Comparative example one
This comparative example provides a method for producing a battery sheet, which is different from the first example in that in step S1, the content of the catalyst activator is 5g/L.
The remaining preparation steps are the same as those provided in example one and will not be described in detail here.
Comparative example two
The present comparative example provides a method for manufacturing a battery sheet, which is different from the first example in that the pH of the alkaline solution is 12.5 in step S1.
The remaining preparation steps are the same as those provided in example one and will not be described in detail here.
Copper layer bond strength:
and measuring the binding force of the copper layer by adopting a scribing method, scribing the copper layer into parallel lines with a distance of 2mm by using a hard scribing cutter with a cutting edge of 30 degrees, and observing whether the scribed copper layer is tilted or peeled. The copper layer bond strength test results are shown in table 1.
TABLE 1 copper layer Performance test results
| Copper layer bond strength | Copper layer appearance | |
| Example 1 | No falling off | Smooth, fine and bright |
| Example two | No falling off | Smooth, fine and bright |
| Example III | No falling off | Smooth, fine and bright |
| Example IV | No falling off | Smooth, fine and bright |
| Comparative example one | Slightly tilted up | Smooth, fine and bright |
| Comparative example two | Slightly tilted up | Smooth, fine and bright |
From table 1, it can be seen that the content of the catalyst activator and the pH of the alkaline solution directly affect the adhesion after spraying as a result of the test of the bonding strength of the copper layer. The copper layer obtained by the preparation method of the battery piece from the first embodiment to the fourth embodiment is well combined with the matrix, the porosity is low, and the surface of the coating is flat and the color is bright. Therefore, the content of the catalyst activator must be controlled within the range of 10g/L to 20g/L, and the pH of the alkaline solution must be between 9.8 and 10.5. Or in the case of a fixed content of the catalyst activator, the pH value of the alkaline solution needs to be strictly controlled between 9.8 and 10.5.
The embodiment also provides a battery piece, which is prepared by the preparation method of the battery piece provided by any one of the embodiments one to four.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. The preparation method of the battery piece is characterized by comprising the following steps:
S1, spraying a catalytic activator on the surface of a pretreated battery piece to form a catalyst coating;
s2, depositing a copper layer on the catalyst coating in the step S1;
S3, forming a grid line on the copper layer in the step S2.
2. The method of producing a battery sheet according to claim 1, wherein in step S1, the content of the catalyst activator is 10g/L to 20g/L; the catalyst activator comprises one of palladium salt, silver and silver salt dissolved in an alkaline solution, and the pH value of the alkaline solution is 9.8-10.5.
3. The method according to claim 1, wherein in step S2, a copper layer of a target thickness is deposited using electroless copper plating solution of a potassium sodium tartrate system.
4. The method of manufacturing a battery sheet according to claim 1, wherein the battery sheet having the catalyst coating layer formed thereon is washed at least once after the end of step S1.
5. The method according to claim 1, wherein in step S3, the photoresist is coated on the battery piece with the copper layer deposited in step S2, the grid line to be electroplated is exposed, the grid line is developed under the action of a developing solution, and the grid line is electroplated.
6. The method of claim 1, wherein after step S2 is completed, the copper layer deposited battery is subjected to at least one post-cleaning drying process.
7. The method of producing a battery sheet according to claim 1, wherein in step S1, the pretreatment includes acid washing and water washing.
8. The method for manufacturing a battery piece according to claim 8, wherein the acid washing is to wash the surface of the battery piece with hydrofluoric acid with a volume concentration of 10% -30%, and the washing time is 5min-15min.
9. The method for manufacturing a battery plate according to claim 1, further comprising step S4 of performing at least one cleaning and drying treatment on the battery plate with the grid lines formed in step S3.
10. A battery sheet prepared by the method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410081920.4A CN118039731A (en) | 2024-01-19 | 2024-01-19 | Battery piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410081920.4A CN118039731A (en) | 2024-01-19 | 2024-01-19 | Battery piece and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118039731A true CN118039731A (en) | 2024-05-14 |
Family
ID=90996068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410081920.4A Pending CN118039731A (en) | 2024-01-19 | 2024-01-19 | Battery piece and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118039731A (en) |
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- 2024-01-19 CN CN202410081920.4A patent/CN118039731A/en active Pending
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