PCB Blogger-China PCB Factory,HOYOGO

Why are the prices of the same PCBs in different factories different, some are expensive, some are very cheap, some are moderately priced, what causes a variety of  PCB price  differences?   This may be due to differences in materials and processes  and others.  The specific price differences are as follows. 1.  Different PCB base material result in price diversification. For ordinary double-panel, for example, if the  board  material,  board  thickness, copper thickness, etc. are different, each of them can cause huge price difference .  In terms of solder mask, there is also a certain price difference between ordinary heat set ink and photosensitive green oil. 2.  Different surface treatment process result in price diversity. Common surface treatments: OSP, Leaded HASL, LF HASL, gold plating, immersion gold and some combined process ect. The above is arranged by price from cheap to expensive. 3.  Different PCB have different manufacturing diffic

On the computer memory bank and the graphics card, we can see a row of golden conductive contacts, the surface of which is gold-plated and the conductive contacts are arranged like fingers, so it is called "gold finger". All signals are transmitted through it. It is also known as Edge Connector in the PCB design. Next, let's learn the surface treatment and processing details of the gold finger PCB . The surface treatment of the gold finger PCB is as follows: 1. Plating Gold/ENEG: Its thickness can reach 3-50u". Due to its superior electrical conductivity, oxidation resistance and wear resistance, it is widely used in gold finger PCB that require frequent insertion and removal, or on PCB boards that require frequent mechanical friction. However, because the cost of gold plating is extremely high, it is only applied to local gold plating such as gold fingers. 2. Immersion Gold/ENIG: The conventional thickness is 1u", up to 3u". The immersion gold

Inevitably, PCBs produce substances that are harmful to the environment during production. If the wastewater containing harmful substances is not properly treated, the pollution to the environment will be great and it will also endanger human health. Moreover, "green production" is the only way to achieve environmental protection and sustainable development. Therefore, it is necessary to treat the wastewater. In addition to producing high-efficiency and high-quality products, HOYOGO PCB factory will not relax the treatment of wastewater. So, what should the wastewater generated in the PCB production process be treated? PCB wastewater divided to cleaning wastewater, ink wastewater, complex wastewater, concentrated acid waste liquid, and concentrated alkali waste liquid. There are many types of pollutants in wastewater, and the composition is complex. Therefore, the rational separation of hazardous materials and subsequent treatment is the key to ensuring trea

Both the dry film and the wet film of the PCB refer to the raw materials used for the Circuit. The dry film is a kind of high-molecular compound. It generates a polymerization reaction after being irradiated with ultraviolet rays to form a stable substance attached to the surface of the plate, thereby achieving the functions of impedance plating and etching. The wet film is a blue viscous liquid synthesized from a photosensitive resin and is added with a sensitizer, a pigment, a filler, and a solvent. The functions of the dry film and the wet film are basically similar. However, if the surface of the PCB is not flat and a very thin film thickness is required, the PCB manufacturers can consider using a wet film. Moreover, the cost of the wet film is much lower than that of the dry film, so that a large amount of cost can be saved. The wet film has a good filling ability, but does not protective film,  so high exposure energy is required. If it is a perforated PCB, the dry film is

A high performance organic rigid PCB substrate, usually composed of dielectric layer(epoxy resin, fiberglass) and high purify conductor(copper foil). The relevant parameters for evaluating the quality of the PCB substrate include glass transition temperature Tg, thermal expansion coefficient CTE, thermal decomposition time and decomposition temperature Td of the substrate, electrical properties, water absorption of PCB, and electromigration CAF, etc. Generally, the substrate materials for PCB can be divided into two types: rigid substrate materials and flexible substrate materials. Copper clad laminates are important rigid base materials. According to PCB board reinforcement materials are generally divided into the following categories: 1. Phenolic PCB paper substrate Since this kind of PCB is composed of pulp wood pulp and the like, it is sometimes called cardboard, V0 board, flame retardant board and 94HB, etc. Its main material is wood pulp fiber paper, a PCB board which