Explain the PCB circuit board manufacturing and packaging process?

"PCB circuit board packaging" is a crucial process, but manyThe pcb board company does not pay much attention to this post-Z process, so a lot of packing work is simply taken, so that the pcb board is not well protected, which will cause the surface of the pcb circuit board to be easily damaged or rubbed. .

　　The step of "PCB board packaging" is valued in PCB factories, and it is usually not as important as the steps in the process. The main reason is that on the one hand, it does not generate added value, and on the other hand, Taiwan's manufacturing industry has not paid attention to it for a long time. The immeasurable benefits of a product's packaging. Therefore, if PCB companies can make small improvements in "packaging", there may be great results. Another example is the Flexible PCB is usually a small piece, and the number is very large. If a good packaging method is used, a special mold is made to make a packaging container for the shape of a certain product, which is convenient to use and protects.

First, the discussion of early packaging

　　For early packaging methods, see the table Outdated shipping packaging methods, detailing their absence. There are still some small factories that use these methods for packaging.

　　The domestic PCB production capacity is expanding rapidly, and most of them are exported, so the competition is very fierce. Not only the competition between 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 needs to be satisfied by customers. Electronic factories of almost a certain scale now require the packaging of PCB manufacturers to pay attention to the following matters, and some even directly give specifications for the packaging of shipments.

　　1. Must be vacuum packed.

　　2. The number of boards per stack is limited according to the size too small.

　　3. The specification of the tightness of each layer of PE film and the regulation of the width of the margin.

　　4. Specifications of PE film and Air Bubble Sheet.

　　5. Carton pounds specifications and others.

　　6. Is there any special provision for buffers before placing the board inside the carton?

　　7. Durability specifications after sealing.

　　8. The weight of each box is limited.

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

　Second, Vacuum Skin Packaging

　　operating procedure

　　1. Preparation: Position the PE film, manually operate whether the mechanical actions are normal, set the heating temperature of the PE film, vacuum suction time, etc.

　　2. Stacking board: When the number of stacked boards is fixed, the height is also fixed. At this time, it is necessary to consider how to stack them to maximize the output and save materials. The following are several principles:

　　a. The spacing between each stack of boards depends on the specification (thickness) and (standard is 0.2m/m) of the PE film, using the principle of heating, softening and elongation, while vacuuming, cover the board and paste it with bubble cloth . The spacing is generally at least twice the total thickness of each stack. If it is too large, the material will be wasted; if it is too small, it will be difficult to cut and very easy to fall off at the sticking point or cannot stick at all.

　　The distance between the plate on the outer side of bZ and the edge must also be at least twice the thickness of the plate.

　　c. If the size of the PANEL is not large, according to the above packaging method, it will waste materials and manpower. If the quantity is very large, it can also be opened into a container similar to the packaging method of flexible board, and then shrink-wrapped with PE film. There is another way, subject to the consent of the customer, leave no space between each stack of boards, but separate them with cardboard, and take an appropriate number of stacks. There are also cardboard or corrugated paper underneath.

　　3. Start: A. Press start, the heated PE film is led down by the pressing frame and covers the table. B. Then suck in by the bottom vacuum pump to close to the circuit board , and paste it with the bubble cloth. C. Raise the outer frame after the heater is removed to cool down. D. After cutting the PE film, pull open the chassis to separate each stack.

　　4. Packing: The packing method, if specified by the customer, must be in accordance with the packing specification of the customer; if not specified by the customer, the packing specification in the factory must also be formulated in 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 should be paid special attention.

　　5. Other notes:

　　a. Information that must be written outside the box, such as "mouth wheat head", part number (P/N), version, cycle, quantity, important and other information. And Made in Taiwan (if export) words.

　　b. Attach relevant quality certificates, such as slices, solderability reports, test records, and various test reports required by customers, and place them in the way specified by the customer.

　　The packaging of pcb board is not a complicated thing. We only need to do the packing of every detail carefully, so as to effectively avoid unnecessary troubles in the later stage.