source:Industry News release time:2021-09-13 Article author:sznbone Popular:pcb
Why the circuit board after soldering must be cleaned
No matter how high or low the performance of the flux is, it is more or less corrosive. Residues and residues after soldering on the circuit board will cause corrosion, leakage, ion migration and other problems. Therefore, the removal of flux residues will of course be regarded as an important processing task by the industry. And what is the effect of processing?
The cleaning effect of the circuit board after soldering should be based on the amount of residual ion residue in the solder joint. The specification adopted by MIL is MIL-P-28809, 55110, and it should have a resistivity above 6MQ-cm in the test. Calculate the resistivity after cleaning the unit area of the metal to be measured and quantitatively. In terms of cleanliness, the resistance should be maintained above 2MQ-cm.
circuit board/circuit board
Representative cleanliness testing methods include Ionogurafu and omegaMeter, which are recognized as simple methods for measuring cleanliness in the MIL specification. The principle of any method is that ionic dirt remains on the solder joints after cleaning treatment, and the change in electrical conductivity is measured as an index through solvent extraction.
The cleanliness measurement method of Ionogufafu method is to immerse the metal to be measured in a solution with high resistivity (lsoburobiruarukoru 75% distilled water 25%). After the ionic substances in the contaminants are extracted, the cleanliness is obtained by the change in the conductivity of the solution. . The cleanliness index is based on the calculated sodium chloride equivalent, which represents the pollution degree of ions (ugNaCI/Cm2). In this method, if the residue cannot be dissolved in lsoburobiruarukoru, the degree of contamination cannot be measured.
Read recommendations:
Network communication board (sixth floor)
Popular recommended products
Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-24Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Network communication board (sixth floor)
2021-04-29High frequency PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27High frequency PCB
2021-04-27Silver oil perforated plate (double-sided)
2021-04-27Display board (six layers)
2021-04-27Aluminum substrate (double-sided)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-24Computer card board (four layers)
2021-04-25Single copper base PCB
2021-04-27High frequency PCB
2021-04-27Laminate copper-based PCB after 4L (sample)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Single-sided double-layer AL base PCB
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-04-27Six-layer Immersion Gold Board (BGA)
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-05-27Mobile phone template (six layers)
2021-04-27High frequency PCB
2021-04-27DIP plugin
2021-05-27Mobile phone board
2021-04-27DIP plugin
2021-05-27SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Mobile phone board
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26SMT stickers
2021-05-27Six-layer Immersion Gold Board (BGA)
2021-04-26Six-layer Immersion Gold Board (BGA)
2021-04-26Related 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
CopyRight © 2007-2024Shenzhen Weienchen Technology Co., Ltd.
粤ICP备2021061255号
Address:
1205, Floor 12, Building 3, Chuangyi Office Building, No. 110, Ziheng West Road, Jinsha Community, Kengzi Street, Pingshan District, Shenzhen, Guangdong, China
Tel:
+86-755-29662580
Email:
sales@victoriapcb.com
PCB
PCBA
Service
Process
Tel: +86-755-29662580
Email: sales@victoriapcb.com
中
current position:
