We are a PCBA manufacturer provide ONE STOP solution service since 2000. We can help you to fabrication bare blank PCB, PCB assembly, box build assembly, and electronic component sourcing etc.
What is PCBA manufacturing?
PCBA manufacturing is the process of PCBA manufacturer according to the board design to use a certain technology, such as SMT, THT, Mixed assembly technology to attach the component to bare blank PCB and solified the component with the PCB board.
What is the best PCBA manufacturer?
When you need a PCBA manufacturer to work for your new PCB assembly project, you always to want to find a reliable factory, that would help you to save time and money. There is some tips of selecting a good PCBA manufacturer:
The certifications proving the PCB factory’s ability to manufacture circuit boards must be present. Additionally, the accreditation guarantees that they will follow the rules and create high-quality items.
The machinery at the manufacturing must be modern. For instance, it should be able to print even the smallest necessary components.
Technology is a crucial factor when it comes to manufacturing capacity. The factory should be able to utilize the most recent technology available.
The manufacturer must be prepared to accept parts supplied by the customers, or the parts they buy must be qualified.
The service offered by the manufacturer is another crucial factor. For instance, the manufacturing should be prompt and able to provide deliveries on schedule.
Any flaws should be easy for the factory to find right away. This will save both money and time. Additionally, the PCBs must be examined before being assembled. PCBs are inspected at various stages of production, but you still need to make sure the factory has implemented quality control procedures.
The PCB factory you select should be able to deliver on schedule. However, there is frequently a misunderstanding about the OTD between the manufacturer and the customer. The factory must therefore define what OTD means.
PCBA manufacturing quality control methods
As a PCB manufacturer, how can we sure the quality of PCBA for you? Below there the PCBA testing methods that we use to control the PCB assembly quality for you.
In-Circuit Testing (ICT)
A variety of testing tools are combined into one during in-circuit testing (ICT). Test probes that attach to test points on the PCB allow the test system to communicate with the board. Circuits and components are electrically tested in comparison to important values.
ICT can find out defects such aspoor soldering issues, component shifts, lifted pins, component failures, missing components and solder shorts.
ICT probes can meansure various electrical properties such as: open circuit tests, short circuit tests, resistance measurement, capacitance measurement, inductance measurement, diode/direction of current measurement, and voltage level measurements.
Flying probe testing
Another in-circuit testing method is called flying probe testing, which uses two or more probes that can move across the PCB board and lower probes on test pads. It performs tests in a sequential fashion. High density PCBs, PCBs that do not fit into typical ICT test rigs, and PCBs with small size connections down to 0.2mm test pitch can all be tested using this technique.
Automated Optical Inspection (AOI)
Several cameras or microscopes are used in this technique to capture photos of the PCB assembly. The photos are then put through a software-aided comparison with reference images. This technique can also be used to check the final product’s quality and offer a visual record of the PCB assembly procedure. With greater accuracy and speed, automated optical testing replaces human visual inspection. Missing components, improper placement, misalignment, general quality, and PCB assembly measurements can all be found with AOI.
This system enables the PCB assembly to check itself. In addition to offering highly reliable testing during production, built-in self test systems are also useful in later phases. For example, when a PCB needs to be repaired, these systems may identify the issue. By shortening the test cycle and utilizing intricate In-circuit testing (testing with probes) setups, BIST systems simplify PCB assembly testing.
With this testing approach, the PCBs’ dependability and durability are guaranteed under the highest permissible pressures and loads. Burn-In Testing can be damaging to the parts being tested and can identify early faults. Depending on the manufacturer’s standards, the electronics in the PCB are continuously powered up to their maximum rating during burn-in testing for 48 to 168 hours. Infant mortality is the term used when a board fails at this point. For PCBs made for use in the military and in medicine, this test is typical.
This inspection testing is intended to find flaws that Automated Optical Inspection techniques miss. For instance, a ball grid array (BGA) packaging with solder joints underneath the chip package is used to verify solder connections underneath. In the manufacturing process, X-ray inspection is increasingly frequently performed on a selected sample basis. The interior quality of silicon wafers is also checked using this technique. AXI tests come in 2D and 3D formats. This technique is typically regarded as an extremely costly PCB assembly testing technique.
The PCB assembly has undergone its final testing. Here, the functional testing device replicates the behavior of the PCB in order to decide if it will pass or fail. Test probes, connection cables, power supply, and test software make up the functional testing bench. In-circuit testing (ICT) does not address PCB behaviors covered by functional test fixtures. For instance, starting up a mobile PCB or a PC motherboard’s bios, then running a built-in self test (BIST). Following the functional testing, the maker is confident enough to extend the product’s warranty for a time during which it has shown itself to be durable.
We would strictly test our customer PCBA in production, find out every defective board from manufacturing and take them out into scrap disposal.
PCBA manufacturing process
Step 1. Check BOM and gerber files, what types of component need and whether any error in design files.
Step 2. Fabricate the blank PCB according to gerber files
Step 3. SMT Stencils manufacturing
Step 4. Applying Solder Paste on PCB board
Step 5. SMD pick and place on board
Step 7. Reflow Soldering solified the component on the board.
Step 8. Inspection the quality of board
Step 9. Through-Hole (PTH) component assembly
Step 10. Wave Soldering PTH component on the board
Step 12. PCBA Functional Testing (FCT)
Step 13. spraying conformal Coating
Step 14. Functional Testing (FCT)
Step 15. Thermal Aging Test
Step 16. Packing
Why we are good partner for your PCBA manufacturing?
Even during the proofing process, a complete set of PCBA remains our primary focus. We perform PCB proofing, material sourcing, PCBA production, and one-stop PCB assembly services for you using our expertise and resources. We will also offer these services if you want to solder particular gadgets.
Our main priority continues to be a full set of PCBA, even during the proofing stage. Using our knowledge and resources, we provide you with PCB proofing, material procurement, PCBA production, and one-stop PCB assembly services. If you want to solder certain devices, we will also provide these services.
The total cost of the service includes the costs for welding, smooth plates, and material purchases. Electronic component prices are provided by Digi Key, Mouser, Avnet, Arrow, Future, Newark, or other specified vendors. There is no buying cost at our business.
We recognize the value of on-time delivery. The buying of materials has been done concurrently with PCB manufacture. Before welding, we will address engineering issues and component issues. A complete set of PCBA manufacture typically takes two weeks if there are no difficult-to-order components and no paperwork problems.
Batch welding absolutely requires DFM. To avoid any engineering issues, we will evaluate your Gerber files, BOM, assembly files, and circuit diagrams. We will lower expenses as a provider of electronic outsourcing services through reasonable PCB assembly and practical welding operations. Additionally, in order to get a high yield and avoid a short circuit bridge, we advise using a solder mask window. Your component list and PCB file will be thoroughly matched before any items are purchased. This can effectively prevent cost overruns and delivery delays.
In a similar vein, DFM should be integrated into your circuit design even for small batch welding. There are numerous probing test models and test restrictions available. You will receive our expert advice on how to identify test spots. Your troubleshooting manual, diagnostic test, and other associated materials will let us fully test your PCBA board in accordance with your test specifications.
We can make your batch welding risk-free in a number of ways. All of the PCBs in our comprehensive range of services are electrically tested. We can also send you some PCBA boards to test out before welding other PCBA boards. The welding quality of BGA and components without extended pins is checked using an X-ray test. Before delivery, we can fix any welding issues.
We make every effort to lower the cost of manufacturing batch PCB assemblies. For repeated orders, there are no NRE and steel mesh costs. To lower the cost of materials, we will examine the material prices offered by major suppliers and select the ones that offer the best value. With the goal of offering reasonable costs and ensuring quality, we have solidified a working partnership with significant suppliers. We promise that our complete line of PCB Assembly will be of high quality, affordable cost, and prompt delivery.