PCB Circuit Board Manufacturing Process

PCB circuit boards are almost inseparable from the electronic devices we can see, ranging from electronic watches, calculators, general-purpose computers, computers, communication electronic devices, military weapon systems, as long as there are electronic devices without integrated circuits. PCB boards are used for electrical interconnection between them. It provides mechanical support for fixed assembly of various electronic components such as integrated circuits, realizes wiring and electrical connection or electrical insulation between various electronic components such as integrated circuits, and provides required electrical characteristics such as characteristic impedance. At the same time, it provides solder mask pattern for automatic soldering; it provides identification characters and graphics for component insertion, inspection and maintenance. So how is the PCB board made? The Flexible PCB Circuit Board Supplier will tell you next.

When we open the keyboard of a general-purpose computer, we can see a soft film (flexible insulating substrate) printed with silver-white (silver paste) conductive patterns and graphic patterns. Because the universal screen printing method obtains this pattern, we call this printed PCB circuit board a flexible silver paste printed PCB circuit board. The printed circuit boards on the various computer motherboards, graphics cards, network cards, modems, sound cards and home appliances that we see in Computer City are different. The substrate used is paper-based (usually used for single-sided) or glass-based (usually used for double-sided and multi-layer), pre-impregnated with phenolic or epoxy resin, and coated on one or both sides of the surface to be laminated and cured. Made. This kind of PCB circuit board is a rigid board. To make a printed PCB board, we call it a Rigid Flex PCB Design.

Rigid Flex PCB Design

Printed circuit graphics on one side We call a single-sided printed circuit board, printed circuit patterns on both sides, and printed circuit boards formed by double-sided interconnection through metallization of holes. We call it a Double Sided PCB. If a double-sided inner layer, two single-sided outer layers or two double-sided inner layers and two single-sided outer printed circuit boards are used, the positioning system and the insulating bonding material are alternately The printed circuit boards in which the conductive patterns are interconnected according to the design requirements become four-layer and six-layer printed circuit boards, which are also called multi-layer printed circuit boards.

There are now more than 100 layers of practical printed PCB boards. PCB board PCB production process is more complicated, it involves a wide range of processes, from simple machining to complex machining, common chemical reactions and photochemical electrochemical thermochemistry, computer-aided design cam And so on. Moreover, there are many technical problems in the production process and new problems will be encountered from time to time. Some problems will disappear if the cause is not found out. Because the production process is a non-continuous pipeline form, any problem will cause the whole line to be discontinued. Or the consequences of a large number of scraps, if the printed circuit board can not be recycled and reused, the work pressure of the process engineer is large, so many engineers left the industry to transfer to the printed circuit board equipment or materials business to do sales and technical services.

Why Is The PCB Board Copper?

The names of the circuit boards are: circuit board, PCB board, aluminum substrate, high frequency board, thick copper board, impedance board, PCB, ultra-thin circuit board, ultra-thin circuit board, printing (copper etching technology) circuit board, etc. There are Rigid Flex PCB Design and more. The circuit board makes the circuit miniaturized and intuitive, and plays an important role in mass production of fixed circuits and optimization of electrical layout. A circuit board can be referred to as a printed circuit board or a printed circuit board.

Multilayer Flexible PCB

There is a phenomenon of beryllium copper on the PCB board. What is the reason for this? Multilayer Flexible PCB Manufacturer will tell you next.

Local collision occurs in the PCB circuit board process, and the copper wire is separated from the base by external mechanical force. This phenomenon is a poor positioning, the copper wire will have obvious distortion, or scratches and impact marks in the uniform direction. Pull out the copper wire of the bad place to see the copper foil surface, it can be seen that the copper foil surface is normal, there will be no side erosion, and the copper foil peeling strength is normal. PCB circuit board design is unreasonable. Designing a thin line with thick copper foil will also cause excessive etching of the line and copper.

Copper foil is excessively etched. The electrolytic copper foil used on the market is generally single-sided galvanized (commonly known as ash foil) and single-sided copper plating (commonly known as red foil). Common copper bismuth is generally galvanized copper foil of 70um or more. There are basically no batches of beryllium copper in the red foil and the ash foil below 18um. When the customer circuit is designed to pass through the etched line, if the copper foil specification is changed and the etching parameters are not changed, the residence time of the copper foil in the etching solution is too long. Because zinc is originally a reactive metal, when the copper wire on the PCB is immersed in the etching solution for a long time, it will lead to excessive side etching of the line, causing some fine line backing zinc layer to be completely reacted and detached from the substrate. That is, the copper wire falls off.

There is also a case where there is no problem with the PCB etching parameters, but the water is washed after etching, and the drying is poor, so that the copper wire is also surrounded by the etching liquid remaining on the surface of the PCB board. If it is left untreated for a long time, excessive copper side etching will occur. And bismuth copper. This situation is generally manifested on the thin line, or in the wet weather, the same PCB will appear similarly bad, peeling off the copper line to see its contact with the base layer (the so-called rough surface) color has changed, Unlike the normal copper foil color, the original copper color is seen, and the peeling strength of the copper foil at the thick line is also normal.

The above is the explanation of the reasons for the export of copper on the PCB board by the 2 Layers Flexible PCB Supplier. I hope that we can do it to everyone.

Advantages Of Multilayer PCB Boards

PCB boards, also known as printed circuit boards, are the providers of electrical connections for electronic components. The main advantages of using a circuit board are greatly reduced wiring and assembly errors, increased automation levels and production labor rates.

Single panel: On a basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. Since the wire only appears on one side, this PCB is called a single panel. Because single-panel has many limitations on the design line (because there is only one side, the wiring can't cross and must follow a single path), so only early circuits use such boards.

Double panel: This board has wiring on both sides, but to use the two sides of the wire, you must have the appropriate circuit connection between the two sides. The "bridge" between such circuits is called a via. The via hole is a small hole filled or coated with metal on the PCB, which can be connected to the wires on both sides. Because the area of the double panel is twice as large as that of the single panel, the double panel solves the difficulty of wiring interleaving in a single panel (can pass through the via hole to the other side), and it is more suitable for circuits that are more complicated than a single panel. If you have a need for this, you can contact us, we can provide Double-sided PCB Wholesale.

Multilayer board: In order to increase the area that can be routed, the multi-layer board uses more single or double-sided wiring boards. Use a double-sided interior layer, two single-sided outer layer or two double-sided inner layer, two single-sided outer printed circuit boards, alternating by positioning system and insulating bonding materials and conductive patterns are interconnected according to design requirements The printed circuit board becomes a four-layer, six-layer printed circuit board, also known as a multilayer printed circuit board. The number of layers of the board does not mean that there are several layers of independent wiring layers. In special cases, empty layers are added to control the thickness of the board. Usually the number of layers is even and contains two layers on the outer side.

Most of the motherboards are 4 to 8 layers of structure, but technically they can achieve nearly 100 layers of PCB. Large supercomputers mostly use quite a few multi-layer motherboards, but because such computers can already be replaced by clusters of many common computers, super-multilayer boards have gradually disappeared. Because the layers in the PCB are tightly coupled, it is generally not easy to see the actual number, but if you look closely at the motherboard, you can still see it.

So here are our Multilayer Flexible PCB Manufacturer to talk about the advantages of multi-layer PCB boards.

Multilayer Flexible PCB 

The advantage of a multi-layer PCB board is that the lines can be distributed in multiple layers of wiring, allowing for the design of more sophisticated products. Or smaller products can be achieved with multi-layer boards. Such as: mobile phone circuit boards, micro projectors, voice recorders and other volumetric products. Additional layers allow for greater design flexibility, better control of differential impedance and single-ended impedance, and better output at some signal frequencies.

Multi-layer circuit boards are the inevitable result of the development of electronic technology to high speed, multi-function, large capacity and small volume. With the continuous development of electronic technology, especially the extensive and in-depth application of large-scale and ultra-large-scale integrated circuits, multi-layer printed circuits are rapidly moving toward high-density, high-precision, high-level digitalization, and there are fine lines and small apertures running through. Blind hole buried hole high plate thickness ratio and other technologies to meet the needs of the market.

Due to the high-speed circuit needs of the computer and aerospace industries. Further increasing the packing density, coupled with the reduction of the size of the discrete components and the rapid development of microelectronics, the electronic device is shrinking in size and the direction of quality reduction; single and double-sided printed boards are impossible due to the limited space available. A further improvement in assembly density is achieved. Therefore, it is necessary to consider using more printed circuits than double-layer layers. This creates conditions for the emergence of multilayer boards.

The above is about the advantages of multi-layer PCB circuit board, I hope to help everyone. In addition, if you are interested in PCB circuit board, you can contact us, we can provide you with PCB Board For Power Electronics Manufacture, the quality is reliable, the price is right, welcome you.

How To Choose The Surface Treatment During The Production Process Of The Circuit Board?

Immersion gold plate and gold plate are the processes often used in PCB circuit board design. Many customers can't correctly distinguish the difference between the two. Some customers think that there is no difference between the two. This is a very wrong view and must be corrected in time. Now Flexible PCB Circuit Board Supplier to the vast number of customers to analyze the difference between gold and gold plating.

Rigid PCB

First, What is gold plating?

We refer to the whole plate of gold plating, generally refers to "electroplating gold", "electroplated nickel gold plate", "electrolytic gold", "electric gold", "electric nickel plate", there is a distinction between soft gold and hard gold (generally hard gold is For gold fingers, the principle is to dissolve nickel and gold (commonly known as gold salt) in chemical potion, immersing the board in the plating tank and turning on the current to form a nickel-gold coating on the copper foil surface of the board. Electro-nickel gold has been widely used in PCB Board Assembly due to its high hardness, wear resistance and oxidation resistance.

Second, what is Shen Jin?

Immersion gold is formed by a chemical redox reaction method. It is generally thicker and is a kind of chemical nickel gold layer deposition method, which can reach a thick gold layer.

Third, What is the difference between Shenjin and gold plating?

1. Generally, the thickness of gold is much thicker than that of gold plating. The gold will be goldener than gold, and the customer is more satisfied with Shenjin. The crystal structure formed by the two is different.

2. Since the crystal structure formed by immersion gold and gold plating is different, immersion gold is easier to weld than gold plating, which will not cause poor soldering and cause customer complaints. At the same time, because Shenjin is softer than gold plating, gold fingerboards are generally plated with gold and hard gold.

3. The immersion gold plate only has nickel gold on the pad, and the signal transmission in the skin effect is not affected by the signal in the copper layer.

4. Compared with gold plating, immersion gold has a denser crystal structure and is less prone to oxidation.

5. As the wiring becomes denser, the line width and spacing have reached 3-4 MIL. Gold plating is prone to shorts in gold wire. The gold plate has only nickel gold on the pad, so it will not produce a gold wire short circuit.

6. The immersion gold plate only has nickel gold on the pad, so the soldering on the line is more firmly combined with the copper layer. The project does not affect the spacing when making compensation.

7. Generally used for relatively high requirements of the board, the flatness is better, generally use immersion gold, immersion gold generally does not appear after the black pad phenomenon after assembly. The flatness and standby life of the immersion gold plate are as good as the gold plate.

The above is the difference between the gold plate and the gold plate. The gold price is expensive on the market. In order to save costs, many manufacturers have been reluctant to produce gold plate, but only the gold plate with nickel gold on the pad which has a lot cheaper. I hope this introduction will provide you with reference and help. If you want to know more about the process and technology of PCB circuit board, you can contact us. We are a professional Rigid PCB Manufacturer able to answer your questions one-on-one! In addition, if you are interested in PCB board, you can also contact us, we can provide you with high quality PCB circuit board, also can provide PCB design, welcome everyone to buy.

LCD TV pcb board assembly

LCD TV pcb board assembly

Our products include HDI board, heavy copper board, backplane board,Blind & Buried PCB semiconductor test board, high frequency board and rigid-flex board, etc., to meet customers' various demand. Our products are widely used in communication, medical equipment, industrial control, power supply, consumer electronics and aerospace, automobile industry, etc.

Order Conditions	Standard Delivery Date	The fastest Delivery Date
Prototype (<20 pcs)	2 days	8   hours
Small Volum (20-100 pcs)	3 days	12 hours
Medium Volum(100-1000 pcs)	6 days	24 hours
Mass productions (>1000 pcs)	Depends on BOM	Depends on BOM

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mobile power pcb circuit board

mobile power pcb circuit board

Our products include HDI board, heavy copper board, backplane board,Blind & Buried PCB semiconductor test board, high frequency board and rigid-flex board, etc., to meet customers' various demand. Our products are widely used in communication, medical equipment, industrial control, power supply, consumer electronics and aerospace, automobile industry, etc.

Order Conditions	Standard Delivery Date	The fastest Delivery Date
Prototype (<20 pcs)	2 days	8   hours
Small Volum (20-100 pcs)	3 days	12 hours
Medium Volum(100-1000 pcs)	6 days	24 hours
Mass productions (>1000 pcs)	Depends on BOM	Depends on BOM

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SSD pcb board assembly

SSD pcb board assembly

Order Conditions	Standard Delivery Date	The fastest Delivery Date
Prototype (<20 pcs)	2 days	8   hours
Small Volum (20-100 pcs)	3 days	12 hours
Medium Volum(100-1000 pcs)	6 days	24 hours
Mass productions (>1000 pcs)	Depends on BOM	Depends on BOM

Our products include HDI board, heavy copper board, backplane board,Blind & Buried PCB semiconductor test board, high frequency board and rigid-flex board, etc., to meet customers' various demand. Our products are widely used in communication, medical equipment, industrial control, power supply, consumer electronics and aerospace, automobile industry, etc.

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