Keyword: circuit board, PCB assembly, PCB cleaning fluid, density PCB
Abstract: what are the precautions for PCB circuit board cleaning fluid to use? In the electronics industry in our country, the vast majority of enterprises in the use of PCB, PCB assembly welding the PCB cleaning fluid can be divided into water soluble type, rosin, and no clean type three categories, used for the first two, with ultrasonic cleaning (there are many is to use alcohol scrub), no clean type in principle should be cleaned.
What are the precautions for PCB cleaning fluid to use? In the electronics industry in our country, the vast majority of enterprises in the use of PCB, PCB assembly welding the PCB cleaning fluid can be divided into water soluble type, rosin, and no clean type three categories, used for the first two, with ultrasonic cleaning (there are many is to use alcohol scrub), no clean type in principle should not to clean, but the most manufacturer in the world even with no clean type flux welding components, still need to be cleaned. Especially in high density PCB and high density IC foot not clean or not by ultrasonic cleaning.
Will lead to high density between lines and IC foot adsorption dust, once the environment humidity is big, easily happened between high density and short circuit between the foot and malfunction, and once the environment is dry, short circuit fault and disappear on its own, this kind of failure and not easy to find.
So the world of electronic machine factory insist on the PCB for ultrasonic cleaning. In our country, has promoted the military electronic machine factory, and received this move can not only improve the product reliability, and reduce the service cost double benefit. Connector, connector, adapter device, such as production, also must be cleaned before plating and assembly, or absorb the dust on the assembly parts, oil will affect its electrical and insulation performance, especially in some complex especially multi-fiber connector.
With shenzhen jin tai ultrasonic equipment co., LTD. Production of washing machine cleaning circuit board is a kind of very good method, cleaning out the circuit board is bright and clean as new, by using the principle of ultrasonic, converts electrical energy into mechanical vibration, high-pressure bubble cleaner particles using bubbles suddenly and violently broken force impact circuit board. When cleaning circuit board should pay attention to and the use of ultrasonic power, right in the cleaning process don't dispatch ultrasonic power is too large, the power and the container size, circuit board is in direct proportion to the amount of general cleaning, choose how ultrasound according to the quantity of the cleaning circuit board, generally only suitable for large quantities of circuit boards, circuit board cleaning solvents are commonly used in the use, not messy pile up when cleaning circuit board, and orderly set up in the tub, messy heap affect the cleaning effect. Using solvent for organic solvent, circuit board special detergent or environmental electronic ultrasonic cleaner, unfavorable use anhydrous ethanol (anhydrous alcohol), or circuit board will be white, commonly known as white spot.
Source: //www.seekic.com
