PCB Tech - PCB manufacturing packaging process?

"PCB circuit board packaging" is a crucial process, but many PCB companies don't pay much attention to the following process, so a lot of packing work is simply carried, so the PCB board is not well protected. It will cause problems such as easy damage or friction on the surface of the PCB circuit board.

The step of "PCB packaging" is highly valued in PCB factories, and is usually less than the various steps in the process. The main reason is that it does not produce added value on the one hand, and on the other hand, Taiwan’s manufacturing industry has not paid attention to it for a long time. Unmeasured benefits that product packaging can bring. So if PCB companies can make small improvements from the "packaging", there may be great results. Another example is that Flexible PCB is usually a small piece and the quantity is very large. If a good packaging method is used, the packaging container is specially opened for the shape of a certain product, so that it is convenient to use and has a protective effect.

1. Discussion on early packaging

Early packaging methods, please refer to the outdated shipping packaging methods in the table, detailing its deficiencies. There are still some small factories that use these methods for packaging.

Domestic PCB production capacity is expanding rapidly, and most of it is for export. Therefore, the competition is very fierce. Not only the competition among domestic factories, but also the competition with the top two PCB factories in the United States and Japan, in addition to the technical level and quality of the products themselves In addition to being affirmed by customers, the quality of packaging must be satisfied by customers. Almost large-scale electronics factories now require PCB manufacturers to ship packages. The following items must be paid attention to, and some even directly give specifications for shipping packaging.

1. It must be vacuum packed.

2. The number of boards per stack is limited depending on the size is too small.

3. The specifications for the tightness of each stack of PE film and the width of the margin.

4. PE film and air bubble sheet (Air Bubble Sheet) specifications.

5. Carton weight specifications and others.

6. Are there any special regulations for buffering before the board is placed inside the carton?

7. After sealing, the tolerance rate specification.

8. The weight of each box is limited.

At present, the domestic vacuum skin packaging (Vacuum Skin Packaging) is similar, the main difference is only the effective working area and the degree of automation.

2. Vacuum Skin Packaging

Operation Procedure

1. Preparation: Position the PE film, manually operate whether the mechanical action is normal, set the PE film heating temperature, vacuum time, etc.

2. Stacking board: When the number of stacked boards is fixed, its height is also fixed. At this time, you must consider how to stack it, which can make the output extremely large and save the material. The following are several principles:

a. The distance between each stack of boards depends on the specifications (thickness) and (standard 0.2m/m) of the PE film. Using the principle of being softened and elongated by heating, while sucking the vacuum, the coated board is pasted with the bubble cloth . The spacing is generally at least twice the total thickness of each stack. If it is too large, material will be wasted; if it is too small, it will be more difficult to cut and the sticking part will fall off easily or it will not stick at all.

B. The distance between the outer board and the edge must also be at least twice the thickness of the board.

C. If the PANEL size is not large, according to the above-mentioned packaging method, materials and manpower will be wasted. If the quantity is very large, it can also be molded into containers similar to soft board packaging, and then PE film shrink packaging. There is another way, but it must be agreed by the customer to leave no gaps between each stack of boards, but separate them with cardboard, and take the appropriate number of stacks. There are also hard paper or corrugated paper underneath.

3. Start: A. Press start, and the heated PE film will be led down by the pressure frame to cover the countertop. B. Then the bottom vacuum pump will suck in air and stick to the circuit board, and stick it with the bubble cloth. C. Raise the outer frame after the heater is removed to cool it. D. After the PE film is cut, the chassis can be opened to separate each stack.

4. Packing: If the customer specifies the packing method, it must be in accordance with the customer's packing specification; if the customer does not specify, the factory packing specification must be established on the principle of protecting the board from external damage during the transportation process. Matters needing attention, As mentioned earlier, especially the packing of exported products must be paid special attention.

5. Other matters needing attention:

A. Information that must be written outside the box, such as "oral wheat head", material number (P/N), version, period, quantity, important information, etc. And the words Made in Taiwan (if export).

B. Attach relevant quality certificates, such as slices, weldability reports, test records, and various customer-required test reports, and place them in the manner specified by the customer.

PCB board packaging is not a complicated thing, as long as the packing work of every detail is done carefully, this can effectively avoid unnecessary troubles in the later stage.