PCB assembly test and inspection
PCB assembly test and inspection
In order to ensure the highest quality products for our customers, we will carry out a large number of tests and inspections during the production process or after the PCB has been assembled. This is the main test and check that we do.
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IQC (Incoming Quality Inspection)
IQC(Incoming Quality Inspection) is a crucial step in the PCB assembly process. IQC includes a thorough examination of each component, including physical characteristics (size, shape, color, texture, screen printing, etc.) and electrical properties such as resistance, capacitance, power, brightness, etc. It guarantees that all parts used in assembly are of high quality and meet the required specifications, which helps to minimize any potential defects or problems caused by faulty parts during the production process. In addition to checking for defects, IQC also allows manufacturers to reduce risk.
By implementing a rigorous IQC process, as a PCB assembly manufacturer, we can guarantee that all components used in our products are of the highest quality and meet the expectations of our customers. This way we can ensure that our products are reliable and safe for the end user.
Frequently Asked Questions
In short, an appropriate amount of solder paste is coated on the solder pad of the PCB, and then the chip component is placed on the printed circuit board at the specified position, and finally the printed circuit board with the attached component is welded through the reflux oven.
"Yes". We strive to provide customers with fast turnaround PCBA services in various ways to meet your needs for fast turnaround PCBA
Standard quickturn times vary depending on the type and number of PCB components. Here are some examples.
1) Fast transfer PCBA service time is 1-5 days.
2) PCB assembly alone takes 1 week.
3) Turnkey PCB assembly or mass production time is 2-3 weeks.
4) Take 4 to 10 weeks for turnkey box assembly.
Below is a brief overview of some of the factors that affect the cost of PCB assembly.
1) Technology used: The assembly process can use surface mounting or through hole technology. Sometimes, some components may require the use of both technologies, but this increases the cost.
2) The number of layers of the board: The cost of a single-sided PCB component is usually lower than the cost of a double-sided or multi-layer PCBA.
3) Component size: Usually, using smaller components and making densely assembled boards will increase the cost.
4) The total number of components.
5) Compliance: Frequent multiple testing to ensure assembly compliance also adds to the cost.
6) Required process: Some PCB components may require a series of processes, such as wave soldering, X-ray inspection, automatic optical inspection, manual welding and other processes. These can add significantly to costs.
7) Flexible or rigid PCB components: Generally, the cost of flexible PCB components is higher than the cost of rigid PCB components.
8) Conformal coating: Cost is also affected by conformal coating requirements. The number of layers of conformal coating affects the cost.
9) Testing: From thermal cycling to circuit testing, many tests need to be carried out before shipping.
10) Packaging requirements: Special packaging requirements may lead to increased costs. Delivery: Costs may increase if expedited delivery times are required.
We can follow these steps to find a reliable PCBA supplier with the best PCB assembly services:
1) Find 5-10 PCB assemblers, view their experience, certification and customer reviews, and then narrow down to 3;
2) Send documents to 3 PCBA suppliers, check their prices, and understand their services after communication;
3) Select the best PCBA manufacturers to start trial orders.
Do you offer testing and inspection services for PCB assemblies?
Yes, we do all kinds of tests and inspections for printed circuit board assembly.
1) First piece inspection
2) Solder paste inspection
3) Automatic Optical Inspection (AOI)
4) Visual inspection
5) BGA X-ray examination
6) Incoming quality control
7) Process quality control
8) Quality assurance
9)ICT(Online Testing)
10)Functional Testing (FCT)
11) PCB on/short test
12) Flying probe test
Typical PCBA board processes include SMT assembly, PTH assembly, and manual assembly. But it takes a lot of small steps, tests, and checks.
There are many devices for manufacturing PCBA and manufacturing PCBS. The main equipment is listed here.
In the pcb assembly process, the following production equipment is required.
1) PCB cleaning machine
2) Solder paste automatic printing machine
3) Solder paste detection (SPI) machine
4) SMT machine
5) reflow soldering machine
6) Wave soldering machine
7) AOI test
The following production equipment is required in the PCB production process:
1) Film exposure machine
2) Drilling machine
3) Laminating machine
4) Grinding machine
5) Laminating machine
6) LDI exp
As mentioned above, PCB is short for printed circuit board. It is the carrier of electronic components. All components are connected via PCB to achieve electronic functions. PCB assembly is short for printed circuit board assembly. It refers to the process of welding components to the PCB. PCBS and components have their functions, but they only work as fully functional products after they are all soldered together.
Manual Visual Inspection
The manual visual inspection process typically includes checking components, welded joints, PCB component integrity, surface finish, and overall appearance. At the same time, it also helps to identify problems such as short circuits, opening, misaligned components, incorrect orientation or missing parts.
Manual visual inspection is essential to ensure high quality products before shipping to customers. In the long run, verifying the quality and accuracy of PCB components minimizes costly defects and reduces warranty claims. In addition, it can help streamline the production process and reduce costs associated with rework or scrap.
AOI (Automated Optical Inspection)
The AOI system utilizes high-resolution cameras and specialized software to quickly pinpoint any problems or discrepancies in the manufacturing process.
Automated Optical Inspection (AOI) is a highly advanced technology used to check for defects and errors in component placement during PCB assembly. It can be used for part calibration, 2D and 3D inspection of solder joint interconnection. AOI technology can also detect more subtle anomalies such as solder joint defects, misalignments, missing components, and more.
AOI is available for both surface mount and through-hole PCBS, enabling manufacturers to ensure consistent quality of their output regardless of PCB design.
AOI also enables manufacturers to reduce overall costs by eliminating costly rework operations caused by incorrect component placement or welding problems. With its speed and accuracy, AOI has become a valuable tool for PCB assembly processes worldwide. It is rapidly becoming one of the most powerful technologies for achieving high yield and quality control in PCB assembly manufacturing.
X-ray Inspection
X-ray inspection does not require any physical contact with the board or its components, making it a non-invasive testing method that can be used on complex PCBS and PCB components. X-ray inspection is an advanced automated optical inspection (AOI) technology used to detect internal solder joints in PCB components. X-ray inspection utilizes X-rays to scan the pcb, allowing for a detailed and accurate view of the wire/solder joint connections inside the board. This imaging will allow defects in solder joints, through holes, and other features to be quickly and easily identified.
ICT (In Circuit Test)
ICT (In Circuit Test) is an integral part of the PCB assembly process as it helps to ensure that the board operates correctly and meets all quality standards. ICT testing allows for a comprehensive evaluation of every component on the board, including resistors, capacitors, transistors and integrated circuits. In addition, this type of test can detect any short circuit or disconnection between components, which can cause operation failure.
FCT (Functional test)
FCT involves testing the functionality of the board by simulating its intended use under real conditions, which helps identify potential problems before the board goes into production. When implemented properly, FCT can facilitate the production of high-quality products that meet customer expectations while reducing production delays and return costs.
FAI (First Article Inspection)
FAI is inspecting the PCB components and comparing them with the customer requirements using the first piece test equipment to check that all component parameters are correct as shown in the BOM list. During FAI, each component of the PCB assembly will be thoroughly checked for accuracy, integrity, compatibility, installation and functionality, including checking for missing or incorrect parts, and verifying electrical performance, such as continuity testing and measuring resistance values.
Reliability Test
Reliability testing is performed to test the stability and durability of the components, the compatibility of different components, and the overall performance of the PCB components. It involves testing under different conditions and environments, such as vibration, mechanical shock, drop, tensile shear, bending, high/low temperature, high humidity, salty environment, etc.
Reliability testing can include physical tests, such as vibration, or environmental tests, such as temperature cycling, moisture exposure, and solder fatigue analysis. These tests enable manufacturers to identify potential problems at the customer use stage. By performing these tests regularly, manufacturers can ensure that their products are safe to use and operate as intended.
Why Choose Us
1.Professional services: From design to delivery, there are people responsible for managing your project.
2.Strict manufacturing process: The production line has multiple checkpoints and our operators strictly adhere to strict quality management regulations to ensure the highest level of quality.
3.Advanced equipment: stripping machine, double-sided alkaline etching machine, metal chemical cleaning machine, etching production line, etc.
4.No minimum Order quantity: We provide PCB prototyping services with no minimum order quantity requirements, ensuring that even small projects receive the same meticulous attention to detail as our large orders.
5.Competitive pricing: Our focus on long-term partnerships and a win-win approach allows us to offer inexpensive PCB manufacturing services without compromising quality.
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