Multilayer printed circuit boards use advantage

1. Multilayer printed circuit boards have the advantages of high density, modest size and light quality compared with other products in installation, taking into account the light miniaturization requirements of electronic products.

2. Multilayer printed circuit boards because the installation is relatively high density, the connection between the components (including electronic devices) is reduced, elevated credibility.

3. Because the graphic of multilayer printed circuit boards has repeatability and consistency, it reduces the errors and leakage of wiring and installation, and saves the maintenance, adjustment and inspection time of machine equipment.

4. Multilayer printed circuit boards technology can improve the number of printed circuit boards, thus increasing the product plan coordination ability.

5. Multilayer printed circuit boards can be composed of a power supply circuit with a certain characteristic impedance, can produce point-to-point transmission power circuit.

6. Multilayer printed circuit boards can be set power circuit, equivalent circuit shielding layer, can also be set metal core heat removal layer and consider shielding heat removal and other special functions.
The above is the advantage of multilayer printed circuit boards. If you want to produce and process multilayer printed circuit boards, you can contact customer service. Huihe circuit is a professional multilayer printed circuit boards factory, specializing in the production of high precision multilayer printed circuit boards and multilayer flex pcb, prototype and batch production of high frequency and mixed pressure pcb.

Application of multilayer printed circuit boards

PCB circuit board is divided into three categories according to the number of superimposed layers: single-sided circuit board, double-sided circuit board, and multilayer printed circuit boards.

1. Single-sided circuit board production is simple, low engineering cost, the defect is unable to be used in complex electronic products.

2. Both sides of the double-sided circuit board are covered with copper and wiring, and the intermediate route can be disconnected according to the pad to generate data connection.

3. Multilayer printed circuit boards means that more than three electrical conductivity layers are printed and insulated at intervals. Multilayer printed circuit boards are one of the development trends of electronic device information technology to high-speed operation, intelligence, large space, limited volume, thinness, lightweight field.

With the continuous development trend of electronic information technology, the application of multilayer printed circuit boards in electronic computers, medical, airline and other electronic products, must consider assembling relatively high density multilayer printed circuit boards technology. The design scheme of multilayer printed circuit boards has flexible, stable and reliable electrical equipment characteristics, excellent economic development characteristics.

Why are multilayer printed circuit boards dominant?

Why are most pcb boards multilayer printed circuit boards? From a design perspective, the total wiring area is more than double that of a single panel, and can be used on more complex power circuits.

With the rapid development of electronic information technology, the complexity of power circuits is considerably increased, and higher requirements are distinctly put forward for the characteristics of the electrical equipment of the circuit board. The multilayer printed circuit boards technology solves these problems.

Multilayer printed circuit boards have the advantages of elevated installation density, modest size, improved data signal transmission rate, and great shielding effect. The higher multilayer printed circuit boards are stacked, the higher the cost, the longer the production and processing cycle time, and the more complicated the quality inspection is.

The multilayer printed circuit boards formed by the lamination and bonding of the pressing equipment have more than one process in the production of a single panel. Because each layer of multilayer printed circuit boards is inseparable, there is no better way to distinguish except the relative logo on the main control board.

This is why multilayer printed circuit boards are dominant, mainly because of extreme temperature resistance. Now the products are more and more high-tech, the production requirements of multilayer printed circuit boards have been improved a lot, simple single and double sided circuit boards can not meet the market demand.

How to distinguish the multilayer printed circuit boards layer?

At present, most of the mother boards adopt multilayer printed circuit boards, which considerably increases the area that can be wired. Multilayer printed circuit boards use additional single - and double-sided cabling boards, and put a layer of insulation between each layer of boards before pressing. The common PCB board is commonly a structure of 4 ~ 8 layers. The number of layers of numerous multilayer printed circuit boards can be seen by watching the section of PCB board, but in fact, the inspection personnel do not have such excellent eyesight.

The multilayer printed circuit boards are made by the material of insulation and not easily bend. PCB circuit called wire or wiring, used to provide multilayer printed circuit boards on the components of the circuit connection.  Commonly, the color of multilayer printed circuit boards is green or black, which is the color of solder resistance paint. It is an insulating protective layer that can protect copper wire and prevent parts from being welded to incorrect places.

Multilayer printed circuit boards on which the circuit is connected are through buried and blind hole techniques. To see how numerous layers of PCB, by observing the transmittance of the pilot hole can be identified, the motherboard or the display card against the light source, if the position of the multilayer printed circuit boards pilot hole can transmit light, it is 6 or 8 layers of board;  the opposite is 4 layers of board.

Features of multilayer printed circuit boards

PCB multilayer printed circuit boards refers to the multilayer printed circuit boards used in electrical products. Multilayer printed circuit boards use additional single-panel or dual-panel wiring boards. Through the positioning system and insulating bonding materials alternately together and the conductive graphics are interconnected according to the design requirements of the printed circuit board becomes four or six layers printed circuit boards, also known as the multilayer printed circuit boards.

1. The number of layers

2. Location and placement direction of multilayer printed circuit boards

3. Multilayer printed circuit boards in the wire layout, wiring area requirements

4. Multilayer printed circuit boards in the conductor direction and line width requirements

5. Multilayer printed circuit boards on the size of drilling and welding pad requirements

6. Multilayer printed circuit boards on the power layer, formation zone, flower hole requirements

7. Multilayer printed circuit boards' requirements for safety spacing

8. Improve the anti-interference ability of multilayer printed circuit boards

Why are multilayer printed circuit boards even layers?

With the continuous development of SMT (surface mounted technology) and the continuous launch of the latest generation of SMD (surface mounted device), electronic products are more intelligent and miniaturized, which promotes the progress of multilayer printed circuit boards technology.The specific reasons are complicated, but the core points are cost, time and quality.

1. Cost

Special design needs to be equipped with special production process, matching specific production parameters, which requires a lot of trial production costs. multilayer printed circuit boards in the production process need experienced engineers, dedicated to follow up, and work together with production, technology, quality, planning, otherwise it is easy to make mistakes.

2. Time

Special design needs to do a lot of targeted time in advance to ensure that the multilayer printed circuit boards are produced according to the data.

3. Quality

For the special design, if the cost can use the money, time and patience to solve, the multilayer printed circuit boards quality does not necessarily ensure the great.  For special processes, it is difficult to ensure the yield, which is a relatively simple process.

Multilayer printed circuit boards manufacturing process

With the rapid development of these processing technologies, PCB design has gradually developed in the direction of multi-layer and high-density wiring. Multilayer printed circuit boards with their flexible design, stable and reliable electrical performance and superior economic performance, have been widely used in the production and manufacturing of electronic products.The multilayer printed circuit boards manufacturing process outline is as follows:

Before pressing, it needs automatic light inspection and eye inspection to enter the pressing machine for typesetting and pressing (in vacuum environment)→ arranging in a fixed size die → 2 hours cold pressing, 2 hours hot pressing → division and disassembly → opening material according to the optimized size of design → grinding → drilling → pressing circuit board → electroplating blind hole → outer circuit → Line oil printing → oven drying → smooth processing → exposure machine (film positioning)→ developing on the developer in the darkroom → etching → printing green oil → baking → printing white characters and characters → edge → short-circuit function test → entering FQC → final inspection and eye inspection → vacuum packaging after cleaning.

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