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Technical Article

How To Choose Components & Substrates For PCBA?

Time:2021-03-30 19:22:53 Click:

1. Selection of components


The selection of components should fully consider the needs of the actual area, and use conventional components as much as possible. Do not blindly pursue small-size components to avoid increasing costs. IC selection should pay attention to the pin shape and pin spacing; The QFP with a pin spacing of less than 0.5mm should be carefully considered, it is better to directly use BGA packaged chips.


In addition, factors such as the packaging form of components, PCB solderability, reliability of smt mounting, and temperature tolerance should all be considered. After selecting the components, a component database must be established, including relevant information such as installation dimensions, pin dimensions as well as SMT manufacturers.





2. The choice of substrates


The substrate should be selected based on the use conditions and mechanical and electrical performance requirements. Determine the number of copper-clad surfaces of the substrate according to the structure (single-sided, double-sided or multi-layer); Determine the thickness of the substrate in the light of the size and the quality of the components carried per unit area. In a short, when selecting substrates, factors such as electrical performance requirements, Tg value (glass transition temperature) and CTE, flatness should be considered, as well as factors such as price.





3.PCB Assembly Flow



1. Customers orders

Customers place orders according to their actual needs, and then put forward specific requirements to the PCBA Manufacturer. At this time, the PCBA Manufacturer will evaluate its own capabilities to see if it can complete the order. If the PCBA manufacturer determines that they can complete the order within the expected time, then the two parties will negotiate to determine the production details.


2. Customers provide production materials

After the customer decides to place the order, he provides a series of documents and lists to the PCBA manufacturer, such as the PCB electronic files, coordinate files, and BOM lists required for production, which all have to be provided.


3. Procurement of raw materials

PCBA manufacturer purchases relevant raw materials from designated suppliers in the light of the documents provided by customers.


4. Incoming Material Inspection

Before Assembled PCB, all raw materials to be used are subjected to strict quality inspection to ensure that they are qualified.


5. PCBA production

During PCB Assembly, in order to ensure the quality of production, whether it is SMT or DIP soldering,PCBA manufacturer need to strictly control the furnace temperature.


6. PCBA test

The PCBA manufacturer conducts strict product testing, and only confirm all PCB boards that pass the test are delivered to the customer.


7. Packaging & shipping

After the PCBA is completed, the product is packaged and then delivered to the customer to complete the entire PCBA work.





4.Why choose Grande To Do PCB Assembly?


1. Strength Guarantee


▪ SMT factory: With imported SMT machines and multiple optical inspection equipment, which is able to produce 4 million points per day. Each process is equipped with QC personnel who will keep an eye on product quality.

▪ DIP production line: Two wave soldering machines and more than 10 employees who have worked for over three years. That’ s to say, these workers are highly skilled and can weld various SMT & DIP components.


2. Quality Assurance With High Cost Performance


▪ High-end equipment can paste precision special-shaped parts, BGA, QFN, 0201 package. It can also be soldered prototype pcba via SMT machine and placing bulk materials by hand.

▪ Both samples, small and large batches can be produced. And there is no SMT Machine starting cost.


3. Rich Electronic Products SMT Soldering Experience With Stable Delivery


▪ Accumulated services to thousands of electronics companies, involving SMT soldering services for various types of automotive equipment and industrial control motherboards. Furthermore, PCBA products are often exported to Europe and the United States, and the quality is able to be affirmed by new and regular customers.


4. Strong Maintenance Ability & Reliable After-Sales Service


▪ The maintenance engineers have sophisticated experience so that those defective boards caused by all kinds of smt soldering can be repaired. Meanwhile, ensuring the connectivity rate of each circuit board also make sense.

▪Order problems feedback will get response, solution and solved as soon as possible.



Previous:Circuit Board Design & Assembly Process

Next:What is the Overall Arrangement Of SMT factory?

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