Introduction To The Basic Structure Of The Flexible PCB

Here is a Multilayer Flexible PCB Factory talking about introduction to the basic structure of the flexible PCB.

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When we are using Flexible PCB, do you understand its basic structure and know what it is made of? Let's take a split to let everyone have a simple understanding of the basic structure of the flexible circuit board.

Flexible PCB

Copper foil substrate (Copper Film)

Copper foil: Basically divided into electrolytic copper and rolled copper. Commonly used in thickness are 1oz 1/2oz and 1/3 oz.

Substrate film: common thickness is 1mil and 1/2mil.

Glue (adhesive): thickness depends on customer requirements.

Cover Film

Cover film protection film: for surface insulation. Common thickness is 1mil and 1/2mil.

Glue (adhesive): thickness depends on customer requirements.

Release paper: avoid the adhesive sticking to foreign objects before pressing; easy to work.

Reinforcement plate (PI Stiffener Film)

Reinforcement plate: Reinforces the mechanical strength of the FPC for easy surface mounting. Common thicknesses range from 3 mils to 9 mils.

Glue (adhesive): thickness depends on customer requirements.

Release paper: Avoid adhesive adhering to foreign objects before pressing.

EMI: Electromagnetic shielding film protects the circuit inside the circuit board from external interference (strong electromagnetic area or susceptible area).

Recognizing the basic structure of flexible circuit boards, we have an understanding of the flexible circuit boards. The above is a brief introduction. We welcome a brief understanding of the needs.

The Prospect Of Flexible Circuit Boards

Find here details of Flexible Board. We are a professional 2 Layer Flexible PCB Manufacturer.

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Flexible Board

The flexible circuit industry is in the midst of a small but rapid development. The polymer thick film process is an efficient, low-cost production process. The process selectively screens conductive polymer inks on inexpensive flexible substrates. A representative flexible substrate is PET. Polymer thick film conductors include silk screen metal fillers or carbon powder fillers. The polymer thick film process itself is very clean, using lead-free SMT adhesives, without etching. Due to the use of the addition process and low substrate cost, the polymer thick film method is 1/10 of the price of the copper polyimide film circuit; it is 1/2 to 1/3 of the price of the rigid board. The polymer thick film method is especially suitable for control panels of equipment. In mobile phones and other portable products, the polymer thick film method is suitable for converting components, switches and lighting devices on printed circuit boards into polymer thick film circuits. It saves costs and reduces energy consumption.

In the next few years, smaller, more complex, and more expensively constructed flexible circuits will require newer method assemblies and the need to add hybrid flexible circuits. The challenge for the flexible circuit industry is to leverage its technological advantages to keep pace with computers, telecommunications, consumer demand and an active market. In addition, flexible circuits will play an important role in lead-free operations.

The Introduction Of PCB Board

Here is Rigid Flex PCB Board Supplier talking about the introduction of PCB board.

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Rigid Flex PCB Board

PCB boards generally refer to printed circuit boards.

PCB circuit boards, also known as printed circuit boards, are the providers of electrical connections for electronic components. It has been developed for more than 100 years; its design is mainly layout design; the main advantage of using the circuit board is that it greatly reduces wiring and assembly errors, and improves the automation level and production labor rate.

According to the number of circuit boards, it can be divided into single-panel, double-panel, four-layer, six-layer and other muti-layer boards.

Since the printed circuit board is not a general terminal product, the definition of the name is slightly confusing. For example, the motherboard for the personal computer is called the motherboard, and cannot be directly called the circuit board. Although there is a circuit board in the motherboard, It's not the same, so when you evaluate the industry, you can't say the same thing. For example, because the integrated circuit parts are mounted on the circuit board, the news media called him an IC board, but in essence he is not equivalent to a printed circuit board. We usually say that the printed circuit board refers to the bare board - that is, the board without the upper components.

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The Production Process Of Flexible Circuit Board

Here is Flexible PCB Circuit Board Supplier talking about the production process of flexible circuit board.

Flexible PCB Circuit Board

Prenatal pretreatment:

To make a good quality FPC board must have a complete and reasonable production process, from pre-production to final shipment, each procedure must be strictly implemented. In the production process, in order to prevent too much open short circuit, the yield is too low or reduce the problem of scraping, calendering, cutting and other process problems caused by the scrapping and feeding of the FPC board, and how to select the material to meet the customer's use. The best effect of the flexible circuit board. Prenatal pretreatment is especially important.

There are three aspects to pre-treatment and pre-treatment, all of which are done by engineers. The first is the FPC board engineering evaluation, which is mainly to evaluate whether the customer's FPC board can be produced. Whether the company's production capacity can meet the customer's board making requirements and unit cost; if the project evaluation is passed, the next step is to prepare the materials immediately to meet the various production links. The supply of raw materials, finally, the engineer: the customer's CAD structure diagram, gerber line data and other engineering documents to process, to suit the production environment and production specifications of the production equipment, and then the production drawings and MI (engineering process card) and other information is released to The production department, various departments such as document control and procurement enter the routine production process.

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The Line Mode Of PCB Manufacturers

Here is Non Layered Rigid Flex PCB Supplier talking about the line mode of PCB manufactures.

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Rigid PCB Price

With the development of technology, advances in technology, electronic products are changing with each passing day, the PCB manufacturing industry has been widely used, and PCB manufacturers are more and more. So when it comes to PCB manufacturers, I believe many people are not very familiar with the way PCB manufacturers make circuits. What are you? Let's take a look at it.

There are two ways for PCB manufacturers to make circuits. One is made of dry film, the other is made of wet film. The dry film and wet film are used as raw materials for the circuit. The basic functions are similar. Dry film production operation It is very convenient to use, automatic film laminating machine, large-scale production, saving a lot of time and labor, but there are also drawbacks, that is, the price of dry film is much higher than the price of wet film, resulting in high cost, but dry film is easy Keep it clean and, without baking, for example, the environment is not very clean, the dry film is easier to control the quality of the operation, the hole can be covered, the precision is high, and the film is not formed. Most PCB manufacturers choose dry film stability. Convenience.

Compared with dry film production, the cost of wet film production is much lower, and the price of wet film itself is lower than that of dry film. However, wet film production cannot be automated, it is not as convenient and dry as dry film production. Holes, because the wet film is relatively thin, it is difficult to achieve high precision. The wet film also has its own advantages. The low cost of the wet film, good adhesion, good contact, good coverage, fast film release, can improve the utilization rate of the equipment, and it is easy to hair on the dry film board, resulting in broken film. The wet film is very good to avoid this phenomenon. If the surface is not flat, or it is not necessary to establish a thicker height, a wet film can be used.

What Aspects Of PCB Proofing Need To Pay Attention To?

Here is a Flexible Board Supplier talking about the aspects of PCB proofing need to pay attention to.

If you want to learn about the Multilayer PCB Price, welcome to contact us.

Multilayer PCB Price

The 21st century is the Internet age. Electronic technology is the cornerstone of Internet development and the golden age of technological development. The technical requirements brought by advanced design and structure have put new PCB companies entering the market under heavy pressure on the basic equipment budget. We know that a complete electronic product is formed through layer processing. So what is the value of PCB board proofing?

1.Quality

When choosing a circuit board company, buyers pay special attention to the quality of the board. The choice of plates for PCB plates, the inks used, the rigor of the employees, and the rigor of the employees all affect the final quality of the board. The designed circuit board needs to be produced by the circuit board manufacturing company. From the first process of the circuit board production to the final process quality inspection, the PCB board proofing process must be carried out according to the strict production process. Each process must be equipped with appropriate testing and testing equipment, these process parameters and equipment to ensure the stability of the PCB quality.

2. Delivery period

Nowadays, most of the purchasing friends have experienced such a situation: the circuit board company promised that the PCB board proofing delivery will be delayed, and there are various reasons to delay the delivery. Many customers have to do PCB allegro, the process of fast PCB proofing is very cumbersome. If the manufacturer fails to strictly manage and control the order from the order to the production, then the production efficiency is likely to be low. On the contrary, PCB proofing companies can only improve production efficiency and ensure delivery speed only when strict process management is carried out in the production process.

3. Proofing process

Since PCB board proofing can also be carried out in a variety of different processes, in addition to paying attention to professional board proofing manufacturers, it is also necessary to pay special attention to the approval of the pcb proofing process used by the manufacturer to ensure the process configuration adopted by the manufacturer. It can meet the requirements of the company's circuit board design and manufacturing, and it can also test the flying probe after the PCB is proofed.

The above is a few points that pay special attention to the proofing of the PCB board. In addition, the company should pay attention to the good communication with the designers and operators of the proofing manufacturer when the board is proofing, and carefully check the relevant information when delivering the proofing materials. The packaging of the files and components should not cause the proof of failure or poor performance due to negligence in some minor matters.

What Is The Difficulty Of Multilayer PCB Board Proofing?

Multilayer PCB boards are more complicated than single-layer boards in terms of design and manufacturing. If you accidentally encounter some problems, what difficulties should we avoid in multilayer PCB board proofing? High Frequency PCB Factory today shares with you.

1. Difficulties in alignment between layers.

Due to the large number of layers in the multilayer circuit board, the user has higher and higher requirements for calibration of the PCB layer. Typically, the alignment tolerance between layers is controlled at 75 microns. Considering the large size of the multilayer circuit board unit, the large temperature and humidity of the graphic conversion workshop environment, the dislocation overlap caused by the inconsistency of different core boards, and the interlayer positioning mode, the centering control of the multilayer circuit board is more difficult.

2. Difficulties in compression manufacturing.

Many inner and pre-cured sheets are superimposed, which are prone to defects such as sliding, delamination, resin voids and bubble residue in stamping production. In the design of the laminated structure, the heat resistance, pressure resistance, rubber content and dielectric thickness of the material should be fully considered, and a reasonable material pressing scheme for the multilayer circuit board should be formulated. Due to the large number of layers, the expansion and contraction control and the dimensional coefficient compensation cannot be consistent, and the thin interlayer insulating layer is liable to cause the interlayer reliability test to fail.

3. Difficulties in drilling.

The use of high TG, high speed, high frequency, thick copper special plates increases the difficulty of drilling roughness, drilling burrs and drilling. The number of layers is large, the total copper thickness and plate thickness are accumulated, the drill is easy to break the knife; the dense BGA is more, the CAF failure problem caused by the narrow hole wall spacing; the plate thickness is easy to cause the oblique drilling problem.

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How To Store PCB Board?

When the PCB board is shipped through the final product inspection vacuum packaging, for the board of bulk orders, the general circuit board manufacturers will do more inventory or prepare more spare parts for the customer. After each batch of orders is ready, vacuum packaging will be stored. Waiting for shipment. So why should the PCB board be vacuum packed? How to store after vacuum packaging? How long is its shelf life? The following will give you a brief introduction.

PCB storage method and shelf life:

Why is the PCB board vacuum packed? PCB Board Factory attach great importance to this issue. Because the PCB board is not sealed, the surface of the gold, tin and solder will be oxidized and affect the soldering, which is not conducive to production.

So how do you store the PCB? The board is no more than other products, it can't be in contact with air and water. First of all, the vacuum of the PCB board can not be damaged. When packing, it is necessary to enclose a bubble film on the side of the box. The water absorption of the bubble film is better, which plays a very good role in preventing moisture. Of course, the moisture-proof beads are also indispensable. Then sort and discharge the label. After sealing, the box must be stored in a dry and ventilated place, separated from the ground, and should be protected from sunlight.

For PCB boards that are not used for a long time, the circuit board manufacturer should preferably apply a layer of three anti-paint on it, and the three anti-paint can protect against moisture, dust and oxidation. This will increase the shelf life of the PCB to 9 months.

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