Pure water equipment for electronic industry
Overview of pure water for circuit boards:
In the production process of circuit boards, the majority of FPC/PCB wet processes are similar. The requirements for pure water in each process are also similar. The electroplating copper, tin, nickel gold commonly used in the production process of circuit boards; Chemical nickel gold plating; PTH/black hole; The production processes such as surface treatment and etching require the use of pure water with different requirements. Due to the use of different chemicals and production processes in the production of circuit boards, the quality requirements for pure water are also different. The most critical indicators are: electrical conductivity (resistivity), total silicon, pH value, and particle size. The production process of pure water for circuit boards and circuit boards varies due to the different manufacturing processes. According to the current usage of most circuit board factories, there are roughly three types: pre-treatment and ion exchange pure water system; Reverse osmosis with ion exchange system; Efficient reverse osmosis EDI ultra pure water equipment

Typical process flow of pure water for circuit boards
The process of pure water for circuit boards can be roughly divided into the following types:
1. Using ion exchange method, the process is as follows: tap water → electric valve → multi-media filter → activated carbon filter → water softener → intermediate water tank → low-pressure pump → precision filter → cation resin bed → anion resin bed → cation anion resin mixed bed → microporous filter → water point
2. Adopting a two-stage reverse osmosis method, the process is as follows: tap water → electric valve → multi-media filter → activated carbon filter → water softener → intermediate water tank → low-pressure pump → precision filter → first stage reverse osmosis host → pH adjustment → mixer → second stage reverse osmosis host (with positive charge on the surface of the reverse osmosis membrane) → pure water tank → pure water pump → microporous filter → water point
3. Adopting the high-efficiency reverse osmosis and EDI method, the process is as follows: tap water → electric valve → multi-media filter → activated carbon filter → water softener → intermediate water tank → low-pressure pump → pH adjustment system → high-efficiency mixer → precision filter → high-efficiency reverse osmosis → intermediate water tank → EDI water pump → EDI system → microporous filter → water point
● 3. Standard reference
Pure water quality for cathode ray tubes and liquid crystal displays (empirical data)
Pure water quality for integrated circuits
Electronic grade pure water standard
4. Characteristics of our company's pure water equipment for circuit boards
To meet the needs of users, achieve water quality that meets the pure water standards for circuit boards and circuit boards, minimize pollution at all levels, extend the service life of equipment, and reduce the maintenance workload of operators. In terms of process design, tap water that meets national standards is taken as the source water, and pre-treatment systems such as medium filters, activated carbon filters, sodium ion softeners, precision filters, RO reverse osmosis host systems, and ion exchange mixed bed (EDI electric desalination system) systems are installed. The water tank in the pure water system of the circuit board is equipped with a liquid level control system, the water pump is equipped with high and low pressure protection devices, online water quality detection and control instruments, and the electrical system adopts PLC programmable controllers, truly achieving unmanned operation; At the same time, a method that combines recommendations and customer requirements is adopted in the selection of process materials, making the equipment more cost-effective and reliable compared to other similar products; We suggest that users spend less money to achieve good results; Comprehensive consideration of various process flows; Achieve low cost and excellent effect.
3、 Pure water and high-purity water equipment
Overview of Ultra Pure Water Used in the Battery Industry
The ultrapure water used in the battery industry includes ultrapure water for battery production, ultrapure water for lithium battery production, ultrapure water for solar cell production, and ultrapure water for battery grids. The preparation of electrolyte in batteries requires very strict requirements for pure water, usually requiring a conductivity of 0.1us/cm (resistivity of 10 megaohms) or higher. The traditional process for preparing ultrapure water for batteries often uses cation exchange equipment, but the disadvantage of this process is that the cation exchange resin needs to be regenerated frequently after a period of use. With the continuous maturity of industrial membrane separation technology, reverse osmosis membrane water treatment process is often used, or first stage reverse osmosis followed by ion exchange mixed bed (or electro deionization EDI) process is used to produce ultrapure water.