CN114887983B - Deoiling method for electronic product before electroplating - Google Patents
Deoiling method for electronic product before electroplating Download PDFInfo
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- CN114887983B CN114887983B CN202210684150.3A CN202210684150A CN114887983B CN 114887983 B CN114887983 B CN 114887983B CN 202210684150 A CN202210684150 A CN 202210684150A CN 114887983 B CN114887983 B CN 114887983B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention belongs to the technical field of oil removal, and particularly relates to an oil removal method before electroplating of an electronic product, which comprises the following steps: carrying out cold degreasing treatment on the electronic product to be degreased to obtain a first electronic product; carrying out ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product; and carrying out electrolytic degreasing treatment on the second electronic product to obtain the target electronic product. According to the method for removing the oil before electroplating the electronic product, disclosed by the invention, the oil removal efficiency of the electronic product is improved by carrying out cold oil removal treatment on the electronic product to be removed, the problem of unqualified products caused by unclean oil removal of the electronic product is avoided, and the problem of environmental pollution caused by the oil removal treatment of the electronic product by adopting toxic and harmful chemical reagents is also avoided.
Description
Technical Field
The invention belongs to the technical field of oil removal, and particularly relates to an oil removal method before electroplating of an electronic product.
Background
Electronic products such as a printed circuit board (Printed Circuit Board, PCB), a terminal, a connector and the like are all formed by stamping and die casting, and various oils are used on the surfaces to increase lubrication and oil injection to prevent the products from rusting, so that the difficulty of oil removal is increased when electroplating is carried out in a later section. For these electronic products, it is possible to perform degreasing treatment by means of solvent degreasing before plating. The solvent degreasing is to achieve the aim of cleaning by utilizing the dissolving action of the organic solvent on the grease, and the dissolving capacity of different organic solvents on the grease is quite different. At present, trichloroethylene is the solvent with highest degreasing efficiency before electroplating of electronic products in electroplating factories through long-term practice. But due to the toxicity of trichloroethylene, the effects on workers and the atmosphere are irreversible, and are increasingly limited and forbidden at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a deoiling method before electroplating of electronic products.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a deoiling method before electroplating of an electronic product, which comprises the following steps:
carrying out cold degreasing treatment on the electronic product to be degreased to obtain a first electronic product;
carrying out ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product;
and carrying out electrolytic degreasing treatment on the second electronic product to obtain the target electronic product.
In an embodiment, the cold degreasing treatment for the electronic product to be degreased is performed to obtain a first electronic product, including:
adding a cold stripping agent into water, and mixing to obtain a cold stripping working solution, wherein the mass percentage of the cold stripping agent and the water in the cold stripping working solution is 5% -20%;
and soaking the printing plate to be degreased in the cold working fluid to obtain the first electronic product.
In one embodiment, the cold stripping agent comprises the following components in percentage by mass: 40-70% of dimethylbenzene; 20-40% of methanol; 1% -5% of target organic solvent; 5-15% of acacia; 3-12% of sodium alkyl benzene sulfonate.
In one embodiment, the target organic solvent comprises at least one of butanone and butyl ether.
In an embodiment, the performing ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product includes:
and placing the first electronic product in a target oil removal working solution at a first target temperature, and obtaining the second electronic product after ultrasonic oil removal treatment of the first electronic product.
In an embodiment, the performing the electrolytic degreasing treatment on the second electronic product to obtain a target electronic product includes:
and placing the second electronic product in a target oil removal working solution at a second target temperature, and performing electrolytic oil removal treatment on the first electronic product to obtain the target electronic product.
In an embodiment, the performing ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product includes:
and adding a target oil removing agent into water for dissolution to obtain the target oil removing working solution, wherein the target oil removing agent comprises at least one of trisodium phosphate, sodium silicate, sodium carbonate and polyoxyethylene alkylphenol ether.
In an embodiment, the target degreasing agent comprises the following components in percentage by mass: 55% -85% of trisodium phosphate; 0% -30% of sodium silicate; sodium carbonate 0% -50%; 0% -23% of polyoxyethylene alkylphenol ether.
In one embodiment, the volume ratio of the mass of the target degreasing agent in the target degreasing working fluid to the water comprises 40g/L to 60g/L
In one embodiment, the first target temperature comprises 45 ℃ to 80 ℃;
and/or, the second target temperature comprises 45 ℃ to 80 ℃.
According to the method for removing the oil before electroplating the electronic product, the electronic product to be removed is subjected to cold oil removal treatment, so that the oil removal efficiency of the electronic product is improved, the problem of unqualified products caused by uncleanness in oil removal of the electronic product is avoided, and the problem of environmental pollution caused by oil removal treatment of the electronic product by using toxic and harmful chemical reagents is also avoided.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a deoiling method before electroplating of an electronic product, which comprises the following steps:
step S11, carrying out cold degreasing treatment on the electronic product to be degreased to obtain a first electronic product;
step S12, carrying out ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product;
and S13, carrying out electrolytic degreasing treatment on the second electronic product to obtain the target electronic product.
According to the method for removing the oil before electroplating the electronic product, the electronic product to be removed is subjected to cold oil removal treatment, ultrasonic oil removal and electrolytic oil removal, so that the oil removal efficiency of the electronic product is improved, the problem of unqualified products caused by uncleanness in oil removal of the electronic product is avoided, and the problem of environmental pollution caused by the adoption of toxic and harmful chemical reagents in the oil removal treatment of the electronic product is also avoided.
Further, in step S11, the step of performing cold degreasing treatment on the electronic product to be degreased to obtain a first electronic product includes:
step S111, adding a cold stripping agent into water, and mixing to obtain a cold stripping working solution;
and step S112, soaking the printing plate to be degreased in cold working fluid to obtain the first electronic product.
In one embodiment, the electronic product includes, but is not limited to, a printed circuit board, terminals, and connectors. The mass percentage of the cold stripping agent and the water in the cold stripping working solution is 5% -20%, for example, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20% and the like; in the range of the ratio, the oil removal efficiency of the electronic product to be treated is higher.
In one embodiment, the cold stripping agent consists of the following components in percentage by mass: 40-70% of dimethylbenzene; 20-40% of methanol; 1% -5% of target organic solvent; 5-15% of acacia; 3-12% of sodium alkyl benzene sulfonate. In the range of the ratio, the oil removal efficiency of the electronic product to be treated is higher. Wherein the target organic solvent comprises at least one of butanone and butyl ether. Specifically, the cold stripping agent comprises the following components in percentage by mass: 50% of dimethylbenzene; 30% of methanol; butanone 2.5%; 10% of acacia; sodium alkylbenzenesulfonate 7.5%. The cold stripping agent can also consist of the following components in percentage by mass: 50% of dimethylbenzene; 30% of methanol; butyl ether 2.5%; 10% of acacia; sodium alkylbenzenesulfonate 7.5%. The electronic product to be deoiled is subjected to cold deoiling treatment by adopting the environment-friendly cold deoiling agent, so that the deoiling efficiency of the electronic product is improved, the problem of unqualified products caused by unclean deoiling of the electronic product is avoided, and meanwhile, the problem of environmental pollution caused by deoiling treatment of the electronic product by adopting toxic and harmful chemical reagents is also avoided. In addition, the electronic product to be deoiled is subjected to cold deoiling treatment at room temperature, so that the problem of low yield of the electronic product caused by high-temperature deoiling is avoided.
Further, in step S112, the electronic product to be degreased is an electronic product requiring degreasing treatment; before the electronic product to be deoiled is put into the cold deoiling agent, the electronic product to be deoiled needs to be detected, if the electronic product to be deoiled is good, the electronic product to be deoiled is subjected to subsequent deoiling treatment, and only the good electronic product to be deoiled is subjected to deoiling treatment, so that the resource waste in the deoiling process is avoided. Soaking the printing plate to be degreased in cold working solution for 1-10 min, such as 1min, 2min, 3min, 4min, 5min, 10min, etc.
Further, in step S12, the step of performing ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product includes: and at a first target temperature, placing the first electronic product in target oil removal working solution, and performing ultrasonic oil removal treatment on the first electronic product to obtain a second electronic product.
In one embodiment, the first target temperature includes 45-80 ℃, e.g., may be 45 ℃, 46 ℃, 47 ℃, 48 ℃, 49 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, etc. And placing the first electronic product in an ultrasonic instrument filled with the target oil removal working solution, and carrying out ultrasonic treatment on the first electronic product to obtain a second electronic product. The ultrasonic time is 1-10 minutes, such as 1min, 2min, 3min, 4min, 5min, 10min, etc.
In one embodiment, the target degreasing agent includes at least one of trisodium phosphate, sodium silicate, sodium carbonate, and polyoxyethylene alkylphenol ether. 55% -85% of trisodium phosphate; 0% -30% of sodium silicate; sodium carbonate 0% -50%; 0% -23% of polyoxyethylene alkylphenol ether. The target degreasing agent comprises the following components in percentage by mass: trisodium phosphate 50%; 50% of sodium carbonate. The target degreasing agent can also comprise the following components in percentage by mass: 80% of trisodium phosphate; 20% of sodium silicate. The target degreasing agent can also comprise the following components in percentage by mass: 80% of trisodium phosphate; 12% of sodium silicate; polyoxyethylene alkylphenol ether 8%. Trisodium phosphate has good oil removing effect, good buffer effect, certain surface activity and excellent water leaching performance. The sodium carbonate has low alkalinity after hydrolysis, good buffering effect and oil removal effect. Sodium silicate has better surface activity, and can be the best wetting agent, emulsifying agent and dispersing agent in alkali compounds when being combined with other surfactants (such as emulsifier polyoxyethylene alkylphenol ether). The target degreasing agent with the formula can be used for efficiently degreasing the first electronic product and the second electronic product, so that the aim of improving the yield of the electronic products is fulfilled.
In one embodiment, the mass to water volume ratio of the target degreasing agent in the target degreasing working fluid comprises 40g/L to 60g/L, and for example, 40g/L, 41g/L, 42g/L, 43g/L, 44g/L, 45g/L, 50g/L, 55g/L, 60g/L and the like.
Further, in step S13, the step of performing electrolytic degreasing treatment on the second electronic product to obtain the target electronic product includes: and placing the second electronic product in the target oil removal working solution at a second target temperature, and carrying out electrolytic oil removal treatment on the first electronic product to obtain the target electronic product.
In one embodiment, the second target temperature includes 45-80 ℃, e.g., may be 45 ℃, 46 ℃, 47 ℃, 48 ℃, 49 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, etc. And placing the second electronic product in an electrolytic container filled with the target oil removal working solution, and carrying out electrolytic treatment on the second electronic product to obtain the target electronic product. The electrolysis time is 1-10 minutes, for example, 1min, 2min, 3min, 4min, 5min, 10min, etc.
In an embodiment, after step S13, it may be determined whether the degreasing is successful through appearance inspection to obtain the degreasing efficiency. The target electronic product can be subjected to electroplating treatment to obtain an electroplated electronic product; detecting the electroplated electronic product to obtain a bad product, and judging whether the bad cause of the bad product is caused by unsuccessful oil removal; obtaining the quantity of bad products which are bad due to unsuccessful oil removal; determining oil removal efficiency according to the ratio (target ratio) of the number of bad products, which are bad due to unsuccessful oil removal, to the total number of products; the oil removal efficiency can also be determined by both appearance detection and determination of whether oil removal is successful or not and target ratio.
Aiming at the problems of environmental pollution caused by a degreasing agent, low degreasing efficiency in a degreasing process of an electronic product and the like, the degreasing process before electroplating of the electronic product is developed, and the degreasing efficiency of the electronic product is improved by adopting the cold degreasing working solution and the target degreasing working solution to perform cold degreasing treatment, ultrasonic degreasing and electrolytic degreasing on the electronic product, so that the problem of unqualified products caused by unclean degreasing of the electronic product is avoided, and the problem of environmental pollution caused by degreasing treatment of the electronic product by adopting toxic and harmful chemical reagents is also avoided. .
The invention has been tested several times in succession, and the invention will now be described in further detail with reference to a few test results, which are described in detail below in connection with specific examples.
Example 1
A method for degreasing a printed circuit board prior to electroplating, comprising the steps of:
step one, preparing a cold stripping working solution: 60g of dimethylbenzene, 18g of methanol, 1.5g of butyl ether, 6g of Arabic gum and 4.5g of sodium alkylbenzenesulfonate are added into 600g of water and mixed to obtain cold-stripping working solution;
step two, cold oil removal: soaking the printed board to be degreased in cold working solution for 1-3 minutes to obtain a first printed circuit board;
preparing target oil removal working solution; adding 40g of trisodium phosphate and 40g of sodium carbonate into 600mL of water, and mixing to obtain a target oil removal working solution;
step four, ultrasonic chemical degreasing: and placing the first printed circuit board in an ultrasonic instrument filled with target degreasing working fluid at 70-80 ℃, and carrying out ultrasonic treatment on the first printed circuit board for 1-3 minutes to obtain a second printed circuit board.
Step five, electrolytic degreasing: and placing the second printed circuit board in an electrolytic container filled with target degreasing working solution at 70-80 ℃ and electrolyzing the second printed circuit board for 1-3 minutes to obtain the target printed circuit board.
Comparative example 1
A method for degreasing a printed circuit board prior to electroplating, comprising the steps of:
step one, preparing target oil removal working solution; adding 40g of trisodium phosphate and 40g of sodium carbonate into 600mL of water, and mixing to obtain a target oil removal working solution;
step two, ultrasonic chemical degreasing: and placing the first printed circuit board in an ultrasonic instrument filled with target degreasing working fluid at 70-80 ℃, and carrying out ultrasonic treatment on the first printed circuit board for 1-3 minutes to obtain a second printed circuit board.
Step three, electrolytic degreasing: and placing the second printed circuit board in an electrolytic container filled with target degreasing working solution at 70-80 ℃ and electrolyzing the second printed circuit board for 1-3 minutes to obtain the target printed circuit board.
Performing appearance detection on 100 target printed circuit boards in the embodiment 1, judging whether oil removal is successful or not, and recording the number (0) of unsuccessful printed circuit boards for oil removal; then electroplating the target printed circuit board with successful oil removal to obtain an electroplated printed circuit board; detecting the electroplated printed circuit board and recording the number (0) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in example 1 was 0.
Performing appearance detection on 100 target printed circuit boards in comparative example 1, judging whether oil removal is successful or not, and recording the number of unsuccessful printed circuit boards (16); then electroplating the target printed circuit board with successful oil removal to obtain an electroplated printed circuit board; detecting the electroplated printed circuit board and recording the number (4) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in comparative example 1 was 20.
The number of unsuccessful printed circuit boards for degreasing in comparative example 1 and the number of unsuccessful printed circuit boards for degreasing in comparative example 1 were used; and the number of defective products caused by unsuccessful degreasing in comparative example 1; it is known that the degreasing efficiency is improved by adopting the degreasing method in example 1.
Example 2
A method of degreasing a connector prior to plating comprising the steps of:
step one, preparing a cold stripping working solution: 60g of dimethylbenzene, 18g of methanol, 1.5g of butanone, 6g of Arabic gum and 4.5g of sodium alkylbenzenesulfonate are added into 600g of water to be mixed, so as to obtain cold stripping working solution;
step two, cold oil removal: soaking the printing plate to be degreased in cold working solution for 1-3 minutes to obtain a first connector;
preparing target oil removal working solution; adding 64g of trisodium phosphate and 16g of sodium silicate into 600mL of water, and mixing to obtain a target oil removal working solution;
step four, ultrasonic chemical degreasing: and placing the first connector in an ultrasonic instrument filled with target oil removal working fluid at 50-60 ℃, and carrying out ultrasonic treatment on the first connector for 1-3 minutes to obtain a second connector.
Step five, electrolytic degreasing: and placing the second connector in an electrolytic container filled with target degreasing working fluid at 50-60 ℃, and electrolyzing the second connector for 1-3 minutes to obtain the target connector.
Comparative example 2
A method of degreasing a connector prior to plating comprising the steps of:
step one, preparing target oil removal working solution; adding 64g of trisodium phosphate and 16g of sodium silicate into 600mL of water, and mixing to obtain a target oil removal working solution;
step two, ultrasonic chemical degreasing: and placing the first connector in an ultrasonic instrument filled with target oil removal working fluid at 50-60 ℃, and carrying out ultrasonic treatment on the first connector for 1-3 minutes to obtain a second connector.
Step three, electrolytic degreasing: and placing the second connector in an electrolytic container filled with target degreasing working fluid at 50-60 ℃, and electrolyzing the second connector for 1-3 minutes to obtain the target connector.
Performing appearance detection on 100 target connectors in the embodiment 2, judging whether oil removal is successful or not, and recording the number (0) of unsuccessful oil removal connectors; then electroplating the target connector with successful oil removal to obtain an electroplated connector; detecting the electroplated connector and recording the number (0) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in example 1 was 0.
Performing appearance detection on 100 target connectors in comparative example 2, judging whether oil removal is successful or not, and recording the number of unsuccessful oil removal connectors (14); then electroplating the target connector with successful oil removal to obtain an electroplated connector; detecting the electroplated connector and recording the number (3) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in comparative example 2 was 17.
The number of unsuccessful connectors for degreasing in comparative example 2 and the number of unsuccessful connectors for degreasing in comparative example 2 were used; and the number of defective products caused by unsuccessful degreasing in comparative example 2; it is known that the degreasing efficiency is improved by adopting the degreasing method in example 2.
Example 3
A method of degreasing a connector prior to plating comprising the steps of:
step one, preparing a cold stripping working solution: 60g of dimethylbenzene, 18g of methanol, 1.5g of butyl ether, 6g of Arabic gum and 4.5g of sodium alkylbenzenesulfonate are added into 600g of water and mixed to obtain cold-stripping working solution;
step two, cold oil removal: soaking the printing plate to be degreased in cold working solution for 1-3 minutes to obtain a first connector;
preparing target oil removal working solution; adding 40g of trisodium phosphate, 9.6g of sodium silicate and 6.4g of polyoxyethylene alkylphenol ether into 600mL of water, and mixing to obtain a target oil removal working solution;
step four, ultrasonic chemical degreasing: and placing the first connector in an ultrasonic instrument filled with target oil removal working fluid at 50-60 ℃, and carrying out ultrasonic treatment on the first connector for 1-3 minutes to obtain a second connector.
Step five, electrolytic degreasing: and placing the second connector in an electrolytic container filled with target degreasing working fluid at 50-60 ℃, and electrolyzing the second connector for 1-3 minutes to obtain the target connector.
Comparative example 3
A method of degreasing a connector prior to plating comprising the steps of:
step one, preparing target oil removal working solution; adding 40g of trisodium phosphate, 9.6g of sodium silicate and 6.4g of polyoxyethylene alkylphenol ether into 600mL of water, and mixing to obtain a target oil removal working solution;
step two, ultrasonic chemical degreasing: and placing the first connector in an ultrasonic instrument filled with target oil removal working fluid at 50-60 ℃, and carrying out ultrasonic treatment on the first connector for 1-3 minutes to obtain a second connector.
Step three, electrolytic degreasing: and placing the second connector in an electrolytic container filled with target degreasing working fluid at 50-60 ℃, and electrolyzing the second connector for 1-3 minutes to obtain the target connector.
Performing appearance detection on 100 target connectors in the embodiment 3, judging whether oil removal is successful or not, and recording the number (0) of unsuccessful oil removal connectors; then electroplating the target connector with successful oil removal to obtain an electroplated connector; detecting the electroplated connector and recording the number (0) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in example 3 was 0.
Performing appearance detection on 100 target connectors in comparative example 3, judging whether oil removal is successful or not, and recording the number of unsuccessful oil removal connectors (12); then electroplating the target connector with successful oil removal to obtain an electroplated connector; detecting the electroplated connector and recording the number (2) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in comparative example 3 was 14.
The number of unsuccessful connectors for degreasing in comparative example 3 and the number of unsuccessful connectors for degreasing in comparative example 3 were used; and the number of defective products caused by unsuccessful degreasing in comparative example 3; it is known that the degreasing efficiency is improved by adopting the degreasing method in example 3.
Example 4
A method for degreasing a terminal prior to electroplating, comprising the steps of:
step one, preparing a cold stripping working solution: 60g of dimethylbenzene, 18g of methanol, 0.75g of butyl ether, 0.75g of butanone, 6g of Arabic gum and 4.5g of sodium alkylbenzenesulfonate are added into 600g of water to be mixed, so as to obtain a cold stripping working solution;
step two, cold oil removal: soaking the printing plate to be degreased in cold working solution for 1-3 minutes to obtain a first terminal;
preparing target oil removal working solution; adding 40g of trisodium phosphate, 9.6g of sodium silicate and 6.4g of polyoxyethylene alkylphenol ether into 600mL of water, and mixing to obtain a target oil removal working solution;
step four, ultrasonic chemical degreasing: and placing the first terminal in an ultrasonic instrument filled with target oil removal working solution at 50-60 ℃, and carrying out ultrasonic treatment on the first terminal for 1-3 minutes to obtain a second terminal.
Step five, electrolytic degreasing: and placing the second terminal in an electrolytic container filled with target oil removal working solution at 50-60 ℃, and electrolyzing the second terminal for 1-3 minutes to obtain the target terminal.
Comparative example 4
A method for degreasing a terminal prior to electroplating, comprising the steps of:
step one, preparing target oil removal working solution; adding 40g of trisodium phosphate, 9.6g of sodium silicate and 6.4g of polyoxyethylene alkylphenol ether into 600mL of water, and mixing to obtain a target oil removal working solution;
step two, ultrasonic chemical degreasing: and placing the first terminal in an ultrasonic instrument filled with target oil removal working solution at 50-60 ℃, and carrying out ultrasonic treatment on the first terminal for 1-3 minutes to obtain a second terminal.
Step three, electrolytic degreasing: and placing the second terminal in an electrolytic container filled with target oil removal working solution at 50-60 ℃, and electrolyzing the second terminal for 1-3 minutes to obtain the target terminal.
Appearance detection is carried out on 100 target terminals in the embodiment 4, whether oil removal is successful or not is judged, and the number (0) of unsuccessful oil removal terminals is recorded; then electroplating the target terminal with successful oil removal to obtain an electroplated terminal; detecting the electroplated terminals and recording the number (0) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in example 4 was 0.
Appearance detection is carried out on 100 target terminals in comparative example 4, whether oil removal is successful or not is judged, and the number of unsuccessful oil removal terminals is recorded (11); then electroplating the target terminal with successful oil removal to obtain an electroplated terminal; detecting the electroplated terminals and recording the number (2) of bad products caused by unsuccessful oil removal; the total number of defective products caused by unsuccessful degreasing in comparative example 4 was 13.
The number of unsuccessful oil removing terminals in comparative example 4 and the number of unsuccessful oil removing terminals in comparative example 4 were used; and the number of defective products caused by unsuccessful degreasing in comparative example 4; it is known that the degreasing efficiency is improved by adopting the degreasing method in example 4.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (1)
1. A method for removing oil before electroplating of an electronic product, comprising:
carrying out cold degreasing treatment on the electronic product to be degreased to obtain a first electronic product;
carrying out ultrasonic chemical degreasing treatment on the first electronic product to obtain a second electronic product;
carrying out electrolytic degreasing treatment on the second electronic product to obtain a target electronic product;
the ultrasonic chemical degreasing treatment is carried out on the first electronic product to obtain a second electronic product, which comprises the following steps:
placing the first electronic product in a target oil removal working solution at a first target temperature, and obtaining the second electronic product after ultrasonic oil removal treatment of the first electronic product;
the electrolytic degreasing treatment is carried out on the second electronic product to obtain a target electronic product, which comprises the following steps:
placing the second electronic product in a target oil removal working solution at a second target temperature, and performing electrolytic oil removal treatment on the first electronic product to obtain the target electronic product;
the ultrasonic chemical degreasing treatment is carried out on the first electronic product to obtain a second electronic product, which comprises the following steps:
the target degreasing agent comprises the following components in percentage by mass: 55% -85% of trisodium phosphate; 0% -30% of sodium silicate; sodium carbonate 0% -50%; 0% -23% of polyoxyethylene alkylphenol ether;
the mass and water volume ratio of the target degreasing agent in the target degreasing working fluid is 40g/L-60g/L;
the first target temperature comprises 45-80 ℃;
and/or, the second target temperature comprises 45 ℃ to 80 ℃;
the cold oil removal treatment is carried out on the electronic product to be deoiled to obtain a first electronic product, which comprises the following steps:
adding a cold stripping agent into water, and mixing to obtain a cold stripping working solution, wherein the mass percentage of the cold stripping agent and the water in the cold stripping working solution is 5% -20%;
the printing plate to be degreased is put into the cold stripping working solution to be soaked, and then the first electronic product is obtained;
the cold stripping agent comprises the following components in percentage by mass: 40-70% of dimethylbenzene; 20-40% of methanol; 1% -5% of target organic solvent; 5-15% of acacia; 3-12% of sodium alkyl benzene sulfonate;
the target organic solvent includes at least one of butanone and butyl ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684150.3A CN114887983B (en) | 2022-06-17 | 2022-06-17 | Deoiling method for electronic product before electroplating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684150.3A CN114887983B (en) | 2022-06-17 | 2022-06-17 | Deoiling method for electronic product before electroplating |
Publications (2)
| Publication Number | Publication Date |
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| CN114887983A CN114887983A (en) | 2022-08-12 |
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