Solder bridging:The reflow soldering step may cause solder joint failures, such as bridging. Excessive solder paste and incorrect temperature curve may cause solder to overflow and come into contact with adjacent solder pads. This may cause electrical short circuits and circuit card assembly failures.
Solution:Determining the correct amount of solder paste and evaluating the correct thermal curve will reduce the occurrence of solder bridging.

Component misalignment:If the component is not placed properly on the solder paste, or if the solder paste below the component is unbalanced, it may cause the component to shift during the reflow process. This can cause component misalignment, leading to open or short circuit faults. As the size of electronic components decreases, component alignment becomes more important.
Solution:In order to solve this circuit card assembly defect, the solder paste must be uniform and evenly and correctly distributed. The correct programming of component placement machines is also crucial for ensuring proper alignment of components.
Dehumidification:Sometimes, during the soldering process, the solder cannot fully wet the contact pads of the PCB. This situation occurs when there is oxidation on the contact pad or conductive material to be connected. Oxidation is a common phenomenon during the heating process, which is why adding nitrogen can help prevent material oxidation.
Solution:Cleaning is the key to maintaining proper wettability of the connecting material. In circuit board assembly, the shelf life, appropriate storage, and shelf life of solder paste should be controlled.
Tombstone:Another defect that affects the PCBA circuit board process is the phenomenon of standing monuments. The phenomenon of erecting a monument is caused by uneven welding, resulting in the components standing upright at one end. When the solder at both ends cannot solidify simultaneously, the force distribution of the component will not match, leading to the phenomenon of erecting a monument.
Solution:The temperature curve should be optimized to make the temperature distribution of the entire circuit board uniform. Another solution is to conduct a thorough design evaluation of the template holes to ensure that the solder on each side of the component is unbalanced.

If you want to pursue cost-effective PCB assembly services, then the most suitable option is to choose a Chinese manufacturer for PCB assembly. Because China, as a world manufacturing power, has abundant material resources, cheap labor resources, and a large number of technical personnel resources. I recommend Haibo here. As a Chinese PCB assembly service provider with over 16 years of experience, we rank among the top in product quality, product price, logistics system, customer evaluation, and technical capabilities. We have been providing one of the best PCB assembly services in China for the following reasons:

We have an efficient quotation process that can help you make informed decisions for your business. We provide reasonable prices for our services and products. We ensure to obtain a clear and accurate set of requirements and expectations for settlement at approved prices. For many years, our quotation has been the most competitive among Chinese printed circuit board assembly suppliers.

We produce high-quality printed circuit board assembly products. This means that our products are assembled and tested according to specifications, international standards, and our internal quality control to achieve the highest quality. We follow a systematic procedure to inspect the products before mass production to ensure the robustness of the PCB assembly process. Please believe us, we are the best PCB assembly company in China, widely acclaimed.

As one of the best PCB assembly manufacturers in China, our assembly equipment is in optimal condition, maximizing productivity with minimal or even zero downtime. Our loyal customers are satisfied with our short delivery time. We also provide expedited printed circuit board assembly services, so we can deliver high-quality products on time.

We not only consistently respond to customer needs, but also ensure the provision of concise and accurate information and responses. This way, any misunderstandings can be avoided. We have multiple communication channels to help you answer your questions. In addition, we also provide one-stop PCB assembly services to solve your worries.

China has always been at the forefront of the world in terms of technological capabilities in PCB assembly. We have a complete SMT solution with capabilities in PCB printed circuit board assembly, inspection, testing, and reliability, enabling comprehensive quality and performance screening of products. We also provide prototype production services and customized solutions, which can be tailored according to your requirements.

If pursuing cost-effective FPC manufacturing services, choosing a Chinese manufacturer is the best choice. As a manufacturing powerhouse, China has abundant resources, cheap labor, and a large number of technical personnel. We recommend Haibo, a Chinese FPC assembly service provider with over 10 years of experience, who has performed outstandingly in various aspects

Efficient and reasonable quotation:There is an efficient quotation process to assist you in making decisions, providing reasonable prices and highly competitive quotes in China.
High quality and reliable products:Produce high standard printed circuit boards, manufacture and test according to specifications, international standards, and internal controls, and conduct pre production inspections to ensure robust processes.
Quick and on-time delivery:The assembly equipment is in good condition, with high productivity, minimal downtime, short delivery time, and also provides urgent services.
Timely and effective response:Always respond to customer needs, provide accurate information, answer questions through multiple channels, and offer one-stop services.
Strong technical strength:China's FPC manufacturing technology is leading, and Haibo has a complete SMT solution that covers assembly, inspection, and other capabilities. It also provides prototype production and customization services.