source:Industry News release time:2022-10-10 Article author:yu Popular:pcb
The acid copper electroplating tank itself may have the following aspects: the air blowing pipe deviates from the original position, and the air is not evenly stirred; the filter pump leaks or the liquid inlet is close to the air blowing pipe to inhale air, resulting in fine air bubbles, which are adsorbed on the board surface or the edge of the line. Especially at the horizontal edge and corner of the line; there may be another point that the use of inferior cotton core, the treatment is not thorough, the anti-static treatment agent used in the cotton core manufacturing process contaminates the bath liquid, resulting in leakage plating, this situation can be increased Blow air and clean the foam on the liquid surface in time. After the cotton core is soaked in acid and alkali, the color of the PCB board surface is white or uneven: mainly due to the problem of polishing agent or maintenance, and sometimes it may also be the problem of cleaning after acid degreasing. , the micro-erosion problem. The copper cylinder polishing agent is out of balance, the organic pollution is serious, and the bath temperature is too high. Acid degreasing generally does not cause cleaning problems, but if the pH value of the water is too acidic and there are many organic substances, especially recycling and circulating water washing, it may cause poor cleaning and uneven micro-etching; micro-etching mainly considers the excessive content of micro-etching agents low, the copper content in the micro-etching solution is too high, and the temperature of the bath solution is low, etc., which will also cause uneven micro-etching of the board surface; in addition, the cleaning water quality is poor, the washing time is slightly longer, or the pre-soak acid solution is polluted, and the board surface may be treated after treatment. There will be slight oxidation. When the copper tank is electroplated, because it is acid oxidation and the board is charged into the tank, the oxide is difficult to remove, and the color of the board surface will also be uneven; in addition, the PCB board surface is in contact with the anode bag, and the anode is not conductive. Such defects can also be caused by conditions such as anode passivation.
Read recommendations:
Six-layer Immersion Gold Board (BGA)
Six-layer Immersion Gold Board (BGA)
Six-layer Immersion Gold Board (BGA)
What is a resin plug hole for a circuit board? Why use a resin plug hole
Popular recommended products
Computer card board (four layers)
2021-04-25High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27High frequency PCB
2021-04-27Network communication board (sixth floor)
2021-04-29Single copper base PCB
2021-04-27Display board (six layers)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Single-sided double-layer AL base PCB
2021-04-27Laminate copper-based PCB after 4L (sample)
2021-04-27Mobile phone template (six layers)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-24Silver oil perforated plate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Aluminum substrate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-26Mobile phone board
2021-04-27DIP plugin
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26SMT stickers
2021-05-27DIP plugin
2021-05-27Mobile phone board
2021-05-27Related Information
The relationship between PCB safety distance and voltage
2024-04-22SMT surface mount processing.Hybrid circuit board PCB
2024-04-15PCB enterprises should pay attention to SMT matters.Electronic components PCB
2024-04-03PCB - the core building block of electronic products.Automotive Electronics PCB
2024-03-25PCB - the bridge and link of the electronic world
2024-03-18How to define high-frequency and high-precision circuit boards.Industrial Electronics PCB
2024-03-11USB PCB interface layout and wiring requirements
2024-01-22Electrolytic capacitor PCB.Steps for using PCB pins
2024-01-15Automotive ElectronicWhat aspects should be considered when processing and manufacturing PCB boards?
2024-01-08Electrolytic capaciWhat is the difference between a gold-plated circuit board and a gold-plated one?
2023-12-25When grinding PCB boards, attention should be paid to.Oscillator (belonging to crystal) PCB
2023-12-18Industrial Electronics PCB!What precautions should be taken when copying and grinding PCB boards
2023-12-11Do you know who is more suitable for LED direct display, regarding the difference between PCB board
2023-12-05Aluminum electrolytic capacitor PCB.What are the standards for selecting PCB boards
2023-11-27Surface Mount Technology (SMT) Phase PCB
2023-11-20Oscillator (belonging to crystal) PCB.The main functions of PCB board
2023-11-13What is the difference between RO filter and PCB filter
2023-11-06Method for determining blind hole PCB board
2023-11-01Electronic Manufacturing Services PCB!What are the effects of PCB board color on performance?
2023-10-23Introduction to the Manufacturing Steps and Requirements of PCBA Test Stand
2023-10-16PCB version maturity stage.AOI circuit board price
2023-09-25How to maintain a PCB circuit board
2023-09-19Development Trend of Printed Circuit Board.Zener diode PCB Vendor
2023-09-14Common problems and cause analysis of PCB circuit board sampling.Zener diode PCB price
2023-09-08What are the issues that need to be understood in PCB circuit board design?IGBT module PCB factory
2023-09-08How to reduce the risk of bending and deformation in PCB circuit board production?Inverter PCB Produ
2023-08-16What are the three main factors that constitute welding defects in PCB circuit boards?Multilayer PCB
2023-08-16The structure of a glass teapot.LCD Module PCB factory
2023-08-11Glass teapot.Inverter PCB Processing
2023-08-11PCB online debugging
2023-08-08