I.Overview
In PCB (printed circuit board) manufacturing, the deionized water (DI water) treatment system is the core equipment in the cleaning process. Its function is to remove ions, particles, and organic matter from the water to prevent residual contaminants from causing circuit short circuits, corrosion, or signal interference.
II.Core Process Combination
Raw Water →Pretreatment →Reverse Osmosis (RO) →Mixed Bed Ion Exchange →Terminal Precision Filtration + UV (Ultraviolet) →DI Water Storage Tank + Circulation System
III.Water quality of DI water in PCB cleaning
Pollutant Type | Water Quality Requirement | ||||
Ion Impurities | Resistivity ≥ 5 - 15 MΩ·cm (25°C) | ||||
Particulates | Filtration precision of ≤ 0.1 - 0.5 μm | ||||
Organics/TOC | < 50 - 100 ppb | ||||
Microorganisms | Terminal UV disinfection control |
IV.Application of DI water in the PCB cleaning process
Cleaning after inner layer etching
Water washing after electroplating
Cleaning after solder mask development
Final water washing
V.Here is a guideline for you to get a proper quotation
Tell us the raw water/source of water(tap water, well water, or sea water, etc)
Provide water analysis report(TDS , conductivity, or resistivity, etc)
Required production capacity( 5m³/H, 50m³/H,or 500m³/H, etc)
What's the pure water used for( industrial,Food and Beverage,or agriculture, etc )