Quality Assurance
Control standards and audit systems
In addition to external qualifications, Ulectronics has implemented a strict set of internal control standards based on our 15 years of experience to provide certification standards that are higher than those required for external qualifications. These quality control standards are stored in various data files and implemented at all stages and stations of the manufacturing process, including procedure documents, declarations of conformity, static control procedures, quality management manuals, manufacturing plans, production record standard documents, material inspection specifications, etc These procedures ensure that our products meet customer requirements at every stage of the production process, from supplier selection to production inspection, to factory inspection and customer service. Our dedicated customer service team is available 24/7 to proactively communicate with customers about the manufacturing progress of their products and any issues encountered during the production process. We also organize technical and engineering personnel from both sides to discuss technology and design. In addition, our team of experts reviews project issues, resolves project difficulties, and provides technical support. This proactive approach has helped many customers identify and optimize design issues, ultimately increasing the speed of product development and marketing while reducing costs associated with production and design. In addition to external qualifications, Ulectronics has implemented a strict set of internal control standards based on our 15 years of experience to provide certification standards that are higher than those required for external qualifications. These quality control standards are stored in various data files and implemented at all stages and stations of the manufacturing process, including procedure documents, declarations of conformity, static control procedures, quality management manuals, manufacturing plans, production record standard documents, material inspection specifications, etc These procedures ensure that our products meet customer requirements at every stage of the production process, from supplier selection to production inspection, to factory inspection and customer service. Our dedicated customer service team is available 24/7 to proactively communicate with customers about the manufacturing progress of their products and any issues encountered during the production process. We also organize technical and engineering personnel from both sides to discuss technology and design. In addition, our team of experts reviews project issues, resolves project difficulties, and provides technical support. This proactive approach has helped many customers identify and optimize design issues, ultimately increasing the speed of product development and marketing while reducing costs associated with production and design.
Reliability Test for PCBs
◆DFM Check
- ◆100% Electrical Test and AOI inspections
- ◆100% Visual Defects Inspection(including warp & twist check)
- ◆Dimensional Inspection (finished hole sizes, PCB profiles, etc)
- ◆100% AOI Dimensional Inspection if required, with +/-0.05mm tolerance
- ◆Microsection Inspection
- ◆Solderability Test (245±5℃; 3-5 sec)
- ◆Thermal Test (288±5℃; 10 sec. inspect delamination, etc)
- ◆Tape Test (adhesion test)
- ◆Peel Test (conductor peel strength)
- ◆Inspect to IPC-A-600 Class 2 and IPC Class 3
- ◆Impedance Test
- ◆Ionic Contamination Test
Reliability Test for PCB Assembly
- ◆DFM Check
- ◆100% AOI (Automated Optical Inspection)
- ◆100% components inspection
- ◆100% Visual Defects Inspection
- ◆X-ray for BGA assembly
- ◆ICT (In-circuit Test)
- ◆FCT (Functional Test)
- ◆Inspect to IPC-A-610 Class 2 and IPC Class 3
- ◆New and Original ICs Guarantee
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.
Why Choose US?
Ulectronics is one of the best PCB assembly manufacturers in China. We have always supplied printed circuit board components at high quality and reasonable prices. Flexible to meet any requirements so that we have been praised by customers.
We have been providing high quality PCB assembly services for 16 years. With our decades of engineering and production experience in the printed circuit board assembly industry, we have always been able to anticipate and avoid possible problems before starting manufacturing, and then fabricate and assemble PCBS correctly for the first time.
Our company attaches great importance to the quality of PCB assembly. A strict printed circuit board assembly quality control system has been established, from raw materials, manufacturing process, quality inspection to the operation of production equipment, PCB assembly is fully controlled.
Through 15 years of unremitting efforts, we have established a sound enterprise production management process, so that our production costs are greatly reduced. Low prices and high quality standards are our goals.
Fast delivery of PCBA with the highest quality standards is one of our company's greatest strengths, we offer one-to-one service and small batch production can be completed within a week.