The concept of circuit board:

Circuit board, generally refers to a circuit board. It can be called a printed circuit board or a printed circuit board, and its English name is PCB; The purpose is to miniaturize and visualize circuits, playing an important role in the mass production of fixed circuits and optimizing electrical layout. General circuit board materials are divided into rigid substrate materials and flexible substrate materials.

Manufacturing process of circuit board:

Incoming inspection - cutting - drilling - copper plating - surface electroplating - graphic transfer - graphic electroplating - etching - solder mask - character printing - surface treatment - surface processing - circuit testing - final quality inspection - final quality assurance - packaging. In actual operation, the process includes feeding, swelling, water washing, de gluing, water washing, neutralization, water washing, etching, water washing, pre soaking, activation, water washing, restoration, water washing, copper plating, water washing, acid leaching, electroplating, water washing, drying, and plate removal.

Defoamer plays a crucial role in circuit board cleaning

Defoamers are used in PCB substrate cleaning, PCB water treatment, film stripping, etching, development, and wastewater treatment (the entire PCB process); The dry film process, especially in the production of printed circuit boards, involves developing and removing the unexposed dry film. The dry film is photosensitive insulating resin, and the developing solution is sodium carbonate solvent. Due to the continuous dissolution of the dry film, the developer produces a certain amount of foam in the process of circulating spray of the system. When the foam reaches a certain degree, the development quality will be affected, making production inconvenient!

The specific characteristics are as follows:

1. Strong defoaming and anti foaming ability, simple water dispersion, low dosage, does not affect the fundamental properties of the foaming system.

2. Good heat resistance, strong alkali resistance, chemical stability, no corrosion, non-toxic, no adverse side effects, non flammable, non explosive.

3. Its function is comparable to imported products, and its price has a more obvious advantage.

The industry also uses silicon free defoamers, which are composed of special ether ester surfactants and other surfactants; It has good anti foaming and anti foaming functions, does not form residual groove walls, has good water washing properties, does not produce floating oil, oil drifting, sticking to the board, and has no impact on subsequent processing. Silicon containing defoamers, due to the use of special emulsifiers for emulsification, have a wide range of acid and alkali resistance (suitable for PH3-13 environments), and are particularly suitable for defoaming and foam suppression under alkaline conditions.

Article sourced from Jiangmen single and double-sided circuit boardhttp://www.yonghongpcb.com/