PCBA Tech - PCBA proofing and SMT quick proofing assembly process

1. What is PCBA proofing?

Whenever we communicate with domestic and foreign customers or promote PCBA proofing, they are always puzzled, what does PCBA proofing mean, what kind of function does it have, and what aspects of it are used in our lives? Today we will introduce what PCBA proofing is and what impact it has on our lives.

PCBA is the abbreviation of Printed Circuit Board + Assembly in English, which means that the empty PCB board passes through the SMT loading and the entire process of DIP plug-in, referred to as PCBA. PCBA means that after the manufacturer gets the PCB (as raw material at this time), Through SMT or plug-in processing, the required electronic components are installed on the PCB board by welding. Generally, such electronic components include IC, resistance, and other materials. After they are heated at high temperature in the soldering furnace, they are A mechanical connection is formed between the components and the PCB board, thus forming a PCBA proofing. In fact, for the difference between PCB and PABC, in simple terms, PCB refers to a circuit board without components, while PCBA proofing is a circuit board soldered with electronic components.

Nowadays, consumers have higher and higher requirements for the quality of PCBA proofing. The main reason is that in order to obtain high profits, in order to gain more consumer recognition, the quality requirements are becoming stricter. As the basis of electronic information products, the assembly of PCBA proofing is an important part of quality and reliability, so it needs to be controlled in outsourcing.

As a large-scale, high-density PCBA proofing, only new projects are continuously developed, and the requirements are more complex and tighter packaging. In order to ensure that its design and function meet the requirements of consumers. These requirements are challenging our ability to build and test these units. To be precise, a larger circuit board with smaller components and a higher number of nodes is our future.

Second, the assembly process of SMT quick proofing

What is SMT quick proofing? What is smt? I believe that for most people, SMT is a relatively unfamiliar term, let alone SMT proofing. SMT is actually a surface assembly technology, an emerging assembly technology and assembly process in the electronics industry. Nowadays, with the rapid economic development, it has been widely used in the assembly of the electronics industry, which provides great convenience to our work. So what are the assembly processes for SMT quick proofing?

1, solder

The development trend of SMT fast proofing is to use a solder pot with a lower temperature. Under normal circumstances, components do not have uniform thermal quality. It is necessary to ensure that all solder joints reach a sufficient temperature in order to form qualified solder joints.

2, crest

The wave crest is the core. The wave crest can send the preheated, flux-coated, non-contaminated metal to the soldering station through a conveyor belt, contact the solder with a certain temperature, and then heat it, and then the solder alloy forms an interconnection through the wave power. A critical step.

3, cooling after wave soldering

Cooling after wave soldering is to limit the tendency of copper-tin intermetallic compounds to form solder joints. Another reason is to accelerate the cooling of the components to avoid board displacement when the solder is not completely solidified.