Thin PCB Board

2023-01-06 17:34:35 Thin PCB Board 64 Viewed

SummaryThin PCB board can be single-layer thin PCB board or multi-layer thin PCB board, and the thickness of normal thin PCB board is between 1.00 mm and 2.0 mm. The smallest thin PCB board thickness is between 1L or 2L or 0.3 mm to 0.4 mm. However, when the thickness is high, such as about 0.6 mm, then we...

Thin PCB board can be single-layer thin PCB board or multi-layer thin PCB board, and the thickness of normal thin PCB board is between 1.00 mm and 2.0 mm. The smallest thin PCB board thickness is between 1L or 2L or 0.3 mm to 0.4 mm. However, when the thickness is high, such as about 0.6 mm, then we can call this PCB an ultra-thin PCB or a long and thin PCB.

The 0.4mm double-sided thin PCB board is used in the field of heat sinks for high-power products. How thick is the PCB board to be called a thin PCB board?

In fact, there is no absolute standard for thin PCB board. Generally, in the circuit board industry, board thickness below 0.6mm can be called thin PCB board, so many PCB manufacturers will promote the thin PCB board process to meet the 0.6mm production process. , but the real thin PCB board is far more than 0.6mm.

As the thickness of the PCB becomes smaller, the difficulty of the thin PCB board process increases, and the thickness of the Huihe PCB can reach 0.3mm and 0.4mm.

What are the tips for designing thin PCB boards?

Thin PCB board, because there are many problems in the internal environment of the circuit board, when in use, the external structure of the thin PCB board is not well placed in an air-dry place, and the surface of the thin PCB board accumulates water mist, so Water droplets form over time, causing damage to electronic components, thus reducing the service life of the thin PCB board, and also causing damage to the thin PCB board due to external factors, and the damaged components cannot be effectively replaced individually. The entire thin PCB board needs to be replaced, and the intact components cannot be effectively protected, thus greatly reducing the usability and reliability of the components.

1. The thin PCB board becomes thin and easy to warp, the residual copper foil on the surface layer and the bottom layer should be as close as possible during design, and the residual copper foil should be symmetrical.

2. Thin PCB board can use a high TG board to prevent high temperature deformation.

3. Thin PCB boards can be fully wrapped around when imposing, and a 10mm track is added in the middle of the imposition to reduce the number of impositions.

The thinner the thin PCB board, the cheaper it is?

Not all products are cheaper with fewer or smaller components. Just like chips at this stage, the smaller the area, the more expensive it is. The same is true for thin PCB boards. It does not mean that the thinner the cheaper, the same adding a layer will cost less.

PCB has two different structures: core structure and foil clad structure.

In the core structure, all the conductive layers in the thin PCB board are deposited on the core material; while in the foil structure, only the internal conductive layer of the circuit board is deposited on the core material, and the outer conductive layer is coated with a foil dielectric board. All conductive layers are bonded together through the dielectric using a multi-layer lamination process.

The nuclear material is double-sided foil-clad board in the factory. Because each core has two sides, the thin PCB board has an even number of conductive layers when fully utilized. Why not use foil on one side and core structure on the rest? The main reasons are: the cost of the thin PCB board and the curvature of the thin PCB board.

Cost advantage of even layer thin PCB board

Because there is one less layer of dielectric and foil, the cost of odd-numbered thin PCB board raw materials is slightly lower than that of even-numbered thin PCB boards. However, the processing cost of odd-numbered PCBs is significantly higher than that of even-numbered PCBs. The processing cost of inner layers is the same; but foil/The core structure significantly increases the processing cost of the outer layers.

Odd-layer thin PCB boards need to add a non-standard laminated core layer bonding process on the basis of the core structure process. Plants that add foil outside the core structure will lose productivity compared to the core structure. The outer core requires additional processing prior to lamination bonding, which increases the risk of scratches and etching errors on the outer layers.

In practice, a thin PCB board does not mean that the thinner it is, the cheaper it is. It is defined according to different products. Maybe a product will be much cheaper after reducing the area or cost, but thin PCB board products are technical products. , its functionality is still very different.

What is Thin PCB board?

Thin PCB board can be referred to as a PCB with thin PCB board compared to the standard type. Plus, it's more compact and lighter. This is due to its bulk copper characteristics and its reduced sheet material.

Thin PCB boards are suitable for any PCB application where high reliability and miniaturization play a major role. It helps miniaturization become easy and smooth with better performance through high-density PCB design.

Classification of Thin PCB board

There are two main types of long and thin PCBs. These are rigid thin PCB board and flexible thin PCB board.

Rigid thin PCB board

Rigid thin PCB board material for applications requiring 2D PCBs. Generally, we can apply them as packaging substrates for integrated circuits. Here, thin PCB board material can help convert the whole assembly into very thin components.

Application of Thin PCB board

Below are some areas where thin PCB boards are useful. These include:

Printer

Wearable

Automotive Engine Control Device

SIM card/TF card

Subway coins

Mobile phone charging module

Near field communication technology device

GPS system

Bar code device

Medical devices such as hearing aids and active implants


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