What is PCB assembly
PCB assembly is the process of producing printing circuit boards. This is a manufacturing technology that converts raw materials into electronic products PCB motherboards. It is used in many industries, including military and aerospace fields. This type of manufacturing requires skilled professionals to lay out the design and then assemble.
The first step of the complete PCB assembly process is to create a PCB design. The design was created using CAD (computer -aided design) software. After the design is completed, it will be sent to the CAM system. The CAM system uses this design to generate the processing path and instructions required to manufacture PCB. The next step is to etched the required patterns onto the substrate. This is usually completed using the optical chemistry process. After the etching pattern, place the electronic element on the substrate and welded. After the welding process is completed, PCB is cleaned and quality inspection. Once you pass the inspection, you can use it.
PCB assembly is one of our main businesses. We can assemble high -quality printing circuit boards for competitive prices and flexible conditions. We are a complete printing circuit board assembly “one -stop” resource, including SMT assembly, BGA assembly, through -hole assembly and welding assembly.
How to assemble PCB
Step 1: Make templates and apply welded paste
In the professional PCB installation, the mechanical fixture fix PCB and welded templates at appropriate positions. Then use a brush to place the tin paste at the expected area with accurate amount. Then, the machine spreads the paste on the template and brushes it evenly to each open area. After removing the template, the welding paste is retained in the expected position.
Step 2: Take the element
After brushing the welded paste on the PCB board, the assembly process will be transferred to the picker (PCBA Store SMT machine: yamaha, Panosonic). Put the process. The robot then aligned the PCB on the workbench and began to apply SMT to the PCB surface. These components are placed on the pre -pre -programmed position on the top of the welded paste, which is called SMT.
Step 3: Backwing welding
After the welding balm and surface installation components are placed in place, they need to be kept there. This means that the welding paste needs to be curing and adheres to the component to the board. PCB assembly is achieved by the process of calling “backflow”.
After picking up and placing the process, the PCB board is transferred to the conveyor belt. The conveyor belt passed through a large return furnace, and the flow furnace was a bit like a commercial pizza furnace. The oven consists of a series of heater, which gradually heated the board to the temperature of about 250 degrees Celsius or 480 Hualhi. Its temperature is enough to melt the solder in the tinnum.
After welded, the PCB continued to pass through the oven. It cools and solidifies the melting welded through a series of cooler heater. This will create a permanent solder to connect SMD to PCB.
Step 4: inspection and quality control
Once the surface paste component is welded after the return process, the function of the circuit board can be tested. Generally, the movement during the return process will lead to poor or lost connection. Short circuit is also a common side effect of this movement, because components in the wrong position sometimes connect to parts that should not be connected in the circuit.
Inspection method includes: manual examination
Automatic optical test (called AOI)
X -ray inspection (most commonly used for more complex or layered PCB.)
Step 5: PCB test
The most important aspect of PCB assembly is testability. The PCB assembly process is seriously dependent on our test level. In the final stage of the assembly process, we will create a test board. The test board allows us to test our electronic components and verify whether they work normally. For example, if we use a microcontroller, we can test whether the micro -controller is correctly received instructions from the computer. We can also use oscilloscope and other tools to test our functions.
Step 6: Tongkou component insertion (THT)-usually manual operation
According to the type of circuit board in the assembly, the circuit board may include various components other than ordinary SMD. These include plating hole components or PTH components. This requires artificial manual plug -in to complete.
Step 7: Final inspection and functional test
After completing the welding steps of the PCB assembly process, the final inspection will test the function of the PCB.
Our has huge experiences in PCB Prototype and Manufacturing more than for 18 years. For provide the best service and competitive price to our customers, we have PCB Prototype manufacturer and PCB Manufacturer dedicated to each PCB fabrication, Here are the capabilities:
> Min.Trace/Space 3.5mil(3.5mil)
> Materials Fr-4, Aluminum, Rogers, Arlon, Polyamide
> Max. Dimension 500*600mm
> Thickness 0.6-2.5mm
> Dimension Tolerance ±0.2mm
> Min. hole size 0.2mm
> Outer Copper Weight 35um/70um/105um
Our offers quick turnkey SMTassembly service, which can meet your needs from prototype quantities as well as small-volume to big-volume production. We deal with the whole process including: Sourcing all the components, PCB manufacturing, PCB assembly, testing, and final shipment.
> Surface Mount (SMT) Assembly
> Mixed technology (SMT & Thru-hole)
> Through-Hole Assembly
> Reflow Soldering
> Wave Soldering
> Pick & Place Assembly
> SMT Solder Paste Printing
Our have huge experiences providing BGA assembly services in PCBA industry, with our profesional BGA placement equipment, smoothly BGA assembly processes, you can depent on us to build high-quality BGA boards.
> Micro BGA
Our provides DIP Assembly one-stop solution! All types of PCB manufacturing is one of our strength. Our could help you to find the designated component and provide PCBA (SMT or DIP) service.
Our has extensive experience with soldering and offers its expertise to companies with prototype or production needs. Soldering assembly is accomplshed with our technologies, depending on the customers requirements and interests.
Leadsintec will continue to supply its customers with Final Assembly capabilities for any size project. Whether you require a small housing or a rack mount assembly, Leadsintec can help you meet your customer’s needs.
If you have any questions, please contact（ firstname.lastname@example.org） for more information.If you provide us with The Bom and the GBR, we can quote you directly.