Analysis of Jiangmen PCB manufacturing and packaging process
1. Process destination
The process of "packaging" has been paid more attention in PCB factories, which is usually less than the steps in the manufacturing process. The first reason is that, of course, it has no added value. On the other hand, Taiwan's manufacturing industry has not paid attention to the inestimable benefits of product packaging for a long time, and Japan has done the best in this respect. Careful observation of Japan's household electronics, daily necessities, even food and other functions will make people prefer to spend more money to buy Japanese goods, which has nothing to do with admiring foreign countries and admiring Japan, but the mastery of customers' mentality. Therefore, the packaging will be discussed independently to let PCB industry know that small improvements may have great results. For example, flexible PCB is usually a small piece with a large number. The packaging method of Japan company may be specially opened to make packaging containers for the shape of a product, which is convenient to use and protective.
2. Discussion on pre packaging
For the early packaging methods, please refer to the outdated shipping packaging methods and list their deficiencies in detail. Now there are still some small factories that are packing according to these methods.
Domestic PCB production capacity is expanding rapidly, and most of it is 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 product itself, the quality of the packaging must be satisfied by the customers. Almost some electronic factories require PCB manufacturers to pack the products. It is necessary to pay attention to the following matters, some of which even directly give the specifications of the packages.
1. Vacuum packaging is necessary
2. The number of plates per stack is limited according to the size
3. Specification for the coating density of each layer of PE film and provisions for the width of the reserved edge
4. Specification requirements for PE film and air bubble sheet
5. Carton weight specification and others
6. Is there any special provision for slowing down the flushing before placing the board inside the carton
7. Resistance specification after sealing
8. Limit of each box
At present, the vacuum skin packaging in China is quite different. The first difference is only the useful working area and the degree of automation.
3. Vacuum skin packaging
A. Preparation: position the PE film, manually operate whether the mechanical actions are normal, set the heating temperature of PE film, vacuum absorption time, etc.
B. Stack plate: when the number of stack plates is fixed, its height is also fixed. At this time, it is necessary to consider how to stack, so as to maximize the output and save the most data. The following are several guidelines:
a. For the spacing of each laminate, the PE film specification (thickness) and specification (0.2m / M) shall be considered, and the principle of heating, softening and lengthening shall be used to adhere the coated board to the bubble cloth after vacuum absorption. Generally, the interval shall be at least twice of the total plate thickness per stack. If it's too large, it will spoil the data; if it's too small, it's difficult to cut and it's very easy to stick. Maybe the bottom can't stick.
b. The distance between the outermost plate and the edge shall also be at least twice of the plate thickness.
c. If panel size is not large, according to the above packaging method, data and manpower will be wasted. If the quantity is very large, it can also be similar to the packaging method of soft board to open the mold to make the container, and then make the PE film shrink packaging. There is another method, but the customer's consent must be sought. No space shall be left between each stack, but it shall be separated by cardboard, and the appropriate number of stacks shall be taken. There are also hardcover or corrugated paper at the bottom.
C. Start: A. press the start button, the heated PE film will be led to fall by the pressure frame and cover the table B. then, the bottom vacuum pump will inhale air and stick to the circuit board and the bubble cloth. C. After the heater is removed and cooled, raise the outer frame D. after blocking the PE film, open the chassis, and then cut each layer for separation
D. Packing: packing method. If specified by the customer, it is necessary to follow the customer's packing specification. If not specified by the customer, the factory's packing specification must also be established based on the principle of protecting the board transportation process from external force damage. Precautions should be paid attention to, especially the packing of exported products.
E. Other precautions:
a. Information necessary to be written outside the box, such as "wheat head", material number (P / N), version, cycle, quantity, important and other information. And made in Taiwan if it's an export.
b. Attach relevant quality certificates, such as slicing, solderability statement, test record, and other test statements required by customers, and place them in accordance with the methods specified by customers. Packaging is not a big knowledge. Do it with your heart. You can save a lot of troubles that should not happen.
Jiangmen printed circuit board http://www.fartai.com/