PCB Industry Application
A printed circuit board (PCB) is the board base for physically supporting electronic components and the provider of circuit connections for electronic components. According to the circuit design, the electrical wiring connecting the electronic components is drawn into a graphic, and then the circuit board is made into a circuit board by the mechanical processing and surface treatment specified by the design, so as to achieve the purpose of signal transmission and processing.
PCBs are widely used in various electronic products. Including mobile phones, computers, electric vehicles, or smart home appliances, PCB is an indispensable part. They can be described as a component that is inseparable from modern life, so it is known as the "mother of the electronics industry." In the PCB manufacturing process, it is necessary to ensure the purity of the raw liquid, the acid-base liquid used in the process, and the safe disposal of the waste liquid. Therefore, in the PCB industry, there is no safety concerns only by using reliable chemical pumps to transport fluids.
In the PCB manufacturing process, there are many complicated stages. Some of the operations, such as etching, developing, and stripping, require the use of chemical liquids. PTCXPUMP sealless magnetic drive pumps are suitable for use in the PCB industry. For chemical fluid transportation, we can provide pumps that meet the needs of users for acid-base fluids or high and low temperature fluid characteristics.
Types of PCB Process
The PCB process is basically divided into dry process and wet process.
Dry Process: Cutting → Press film → Exposure → Press → Drilling → Routing
Wet Process: Brushing → Inner Layer Imaging → Inner Layer Etching → Inner Layer Stripping → Oxide Treatment → PTD → Immersion Copper → Outer Layer Imaging → Copper Plating → Tin plating → Outer Layer Stripping → Outer Layer Etching → Stripping → Solder Mask → Legend Printing → Surface Finish
Next, several important stages of the wet process will be described as follows.
The brushing process at the beginning requires multiple washings to achieve the purpose of cleaning. Rinse: Wash off the dust on the copper surface to ensure the surface is clean and dust-free.
Acid cleaning: Clean the copper surface with chemical solution to increase the roughness and facilitate the subsequent adhesion of nickel alloy to the copper surface.
Use the developing solution to dissolve and rinse the non-photosensitive dry film. The photosensitive dry film is hardened by the photosensitive, so the developing solution cannot be dissolved, and it will be retained and attached to the board surface to form a circuit pattern.
First, wash away the non-photosensitive outer dry film with chemical water, and the copper surface not covered by tin below (that is, the unnecessary copper surface) will be exposed, and then etch with an etching solution to dissolve away the unnecessary copper surface, only the copper surface on which the dry film is attached will be left to form the wiring areas.
- Plated Through Hole (PTH)
Each layer of circuits is connected by vias, which means that different circuit layers are connected by drilling holes. However, it is not possible to conduct electricity simply after drilling, and copper must be plated on the surface of the through holes for conductivity to allow these circuit layers to be electrically connected.
- Immersion Tin
A thin layer of tin is deposited on the copper surface of the PCB to protect the copper surface from oxidation before etching.
Wash away the tin on the surface with a tin-lead stripper, leaving the required circuit pattern.
- Surface Finish
Finally, surface finish is carried out on the exposed copper surface not covered by the solder mask layer to avoid oxidation of the bottom copper surface, so as to ensure good solderability or electrical continuity during PCB assembly.
There are two main types of surface finishes: metallic and organic. HASL, immersion gold and immersion tin all belong to metal surface molding, while OSP belongs to organic surface molding.
After the circuit board is manufactured, how to properly dispose of the waste liquid at the end of the process and effectively prevent pollution problems, building a complete recovery and discharge system is very important, so that safety and environmental protection can be considered.
PTCXPUMP Sealless Magnetic Drive Pump Can Be Safely Applied To:
- Chemical Supply System
- PCB Process: brushing, developing, etching, stripping, surface finish, etc.
- Wastewater Treatment System
PTCXPUMP sealless magnetic drive pump is used in the PCB industry to provide you with the best solution to transfer fluid. The design without mechanical seal can effectively avoid leakage, and the material is GFR-PP and CFR-ETFE, which has excellent corrosion resistance and is suitable for transporting highly corrosive liquid such as hydrochloric acid, sulfuric acid, hydrofluoric acid and acetic acid or flammable and explosive fluids. In the PTCXPUMP sealless magnetic drive pump series, PTC-100 ~ PTC-251 are for small applications, and PTC-400 ~ PTC-675 are for medium and large applications. There are various models to meet your various operating needs. PTCXPUMP is committed to becoming your preferred choice for resting assured to use pumps.