One-Stop Solution for PCB & Assembly

  • PCB Fabrication, Component Sourcing & Turnkey PCB Assembly
  • Box Build Assembly & Functional Testing
  • Repair/Rework services, Reverse engineering services
  • ISO9001:2015, ISO 13485:2016 Certified & UL Listed
  • 100% E-test, AOI, X-RAY, ICT & FCT
  • No MOQ & Competitive Pricing

What is Electronic Manufacturing Service?

Electronic manufacturing services are also called electronic EMS or electronic contract manufacturing. If the company announces it provides an electronics manufacturing service, it can provide services for electronics design, manufacturing, testing, distribution, storage, logistics, return/repair, etc.

Electronics Manufacturing Services (EMS) providers are those companies that provide both original equipment manufacturers (OEMs) and end-users with electronic products and services. These include PCB and electronics design, manufacturing, testing, supply chain management, and repair and maintenance.

Viasion is a trusted EMS provider in China. We focus on small to medium-volume PCB and electronics device manufacturing with more than 16 years of experience. Our factory is UL-listed and ISO9001 certified. 

Electronic Manufacturing Services

Get a free quote now!

    Our electronic manufacturing capabilities:

    The Process of Electronic Manufacturing Services-12 Steps

    1. DFM/DFA

    PCB file checking

    BOM list check

    2. PCB Fabrication & Parts sourcing

    PCB Fabrication


    Electronics Parts sourcing

    3. PCB Assembly

    4. IC programming

    5. PCB Testing & Inspections

    AOI (Automated Optical Inspection) is a vital part of the electronic manufacturing process. AOI inspection is a non-destructive testing method to detect and identify printed circuit board (PCB) defects. It involves using optical technology such as cameras, lasers, or X-rays to scan each component on a PCB for abnormalities. In addition, AOI systems can be programmed to look for specific types of defects, including missing components, incorrect polarity, shorts between pins, misalignments between layers, and other issues that could cause product failure. Undoubtedly, AOI inspection provides manufacturers an efficient way to quickly and accurately identify potential problems before products are sent out for final assembly or packaging.

    Visual inspection is a crucial process in electronic manufacturing company, as it helps to ensure that the electronic components being produced meet high standards of quality. Visual inspection involves examining electronic components and assemblies closely for any potential defects or inconsistencies affecting their performance or reliability. This type of inspection requires careful observation, attention to detail, and an understanding of the technology involved to identify any irregularities quickly. By using visual inspection methods, manufacturers can detect issues before they become more serious problems down the line.

    In-circuit test (ICT) is electronic manufacturing testing that checks for electronic components and circuits’ correct functionality and physical integrity. It is an important quality assurance tool in electronic product development, production, and repair. ICT involves connecting a specialized test system to the electronic circuit board under test and then running tests to detect errors or defects in the parts or their connections on the board. This process helps manufacturers ensure that their products meet design specifications before they are released into the market.

    6. Electro-mechanical assembly

    Electro-mechanical assembly is a crucial part of electronic manufacturing, given that it combines electronic and mechanical components to create more complex systems. By combining electrical circuits with physical components such as motors, actuators, sensors and other devices, electro-mechanical assemblies can produce highly efficient products used in various industries. However, this process requires a combination of engineering knowledge and skilful craftsmanship to ensure the accuracy of each electronic product. With advances in technology and automation, the electro-mechanical assembly has become increasingly popular for its ability to reduce production time while increasing quality control.

    7. Functional Test

    A functional test is essential to EMS manufacturing, ensuring the electronic product meets the required specifications and functions correctly. The functional test involves testing each device component to ensure they work perfectly together. That includes testing for compatibility, performance, reliability and safety features. By performing Functional Tests on electronic products during production, manufacturers can save time and money by avoiding costly defects or recalls later.

    8. Burn-in Test

    Burn-in Test is an EMS manufacturing process used to test the reliability of electronic components. It involves running a device or system under normal operating conditions for a while, usually with simulated environmental conditions such as temperature and humidity. That allows for identifying and correcting any potential defects or problems that may arise during prolonged use before the final product is released. By doing so, the burn-in test helps ensure that electronic products function reliably over their expected lifetime.

    9. Wire bonding

    Wire bonding is a critical process in EMS manufacturing, allowing for the secure connection of electronic components. That involves joining two pieces with an electrical wire from gold or aluminium. Wire bonding can join multiple electronic components, ensuring they are securely connected and functioning correctly. The most common type of wire bond is a ball bond, where the wire is shaped into a small sphere at each end which makes contact with both electronic components being joined. There are also other types of bonds, such as wedge or stitch bonds, which may be used depending on the project's needs. Wire bonding provides a reliable connection between electronic components while ensuring they remain electrically isolated and operate without interference.

    10. Conformal Coating

    Conformal coating is an electronic manufacturing process that protects electronic circuits from extreme environmental conditions. This protective coating helps prevent the corrosion and oxidation of electronic components and provides a barrier against dust, moisture, fungus, and other contaminants. Conformal coating can also provide electrical insulation between components on a circuit board or other substrate.

    11. Final Quality Control(FQA)

    Final Quality Control (FQA) is an essential step in EMS electronics. It involves inspecting and testing electronic components, assemblies and products to ensure they meet pre-defined quality standards. FQA helps identify potential defects or issues that could affect product performance before reaching the end user. By implementing rigorous FQA procedures, electronic manufacturers can guarantee high levels of quality assurance throughout their production process and reduce costly recalls due to faulty parts or products.

    12. Custom Packaging

    Custom packaging in EMS electronics is the process of designing and fabricating a unique package that meets the needs of a specific electronic product. This type of packaging is essential for protecting electronic components from environmental hazards such as dust, moisture, vibration, shock, and temperature extremes. Custom packaging also helps reduce costs by providing an efficient way to store and transport electronic products safely. Additionally, custom packaging can help improve product performance and reliability by reducing the risk of damage during handling or shipping. Undoubtedly, manufacturers can ensure their electronic products are correctly packaged while saving time and money on production costs by utilizing custom design techniques.

    Why Do We Need an Electronic Manufacturing Service ( EMS) Provider?

    Initially, all the EMS electronics is operated by in-house assembly. But it would be easy to face a problem that when the company’s electronic products demand suddenly boom in the market, it is hard for a company to find enough workforce to finish the complete production mission to meet the market need. Therefore, in the 1970s, some companies were established, primarily providing electronic product manufacturing services for small companies with electronic product manufacturing demand but lacking plant or human resources.

    EMS enterprises can be vast companies, so they can compete with the most prominent companies worldwide to win those famous brands’ manufacturing orders, such as Cisco, Microsft, iPhone etc.  But most EMS companies are smaller companies like Viasion, and we produce small to medium-volume electronic devices for our customers. 

    How to Select An Electronic Manufacturing Service Provider?

    According to Viasion’s experience, regarding selecting an electronic manufacturing service provider in China, we should consider the following aspects to get the best electronics manufacturing companies. In this article, we’ll talk about what an OEM is and how it can help you when you need help with your product range or promote your services online. We’ll also talk about what kinds of ODMs can help you with your business.

    What Are the Differences between CM and EMS?

    CM (Contract Manufacturer) and EMS (Electronic Manufacturing Service) are two terms often interchangeably used when referring to companies that specialize in manufacturing services. However, while the two types of services may seem similar, they each have unique advantages and differences.

    What are the Differences between EMS and OEM?

    While this is a typical example of a high-volume, high-profile sector, the core focus of both EMS and OEMs differs significantly in the medium-high complexity and low-medium volume sectors. This difference can lead to differences in how both parties approach their customers.
    An OEM typically only produces a limited number of new products yearly due to their established portfolio. It is because they will only make their products and not share build documentation with third parties. A CEM, on the other hand, will typically be working with a wide range of customers and will often be asked to deliver new products to their customers. It means that their NPI process will be more refined and robust. Having the necessary data to manage their various products will also vary depending on their manufacturer.
    Due to the complexity of their operations, EMS companies often have to work with multiple customers to produce numerous products. That can result in a global supply chain.
    The variety of products and solutions that EMS companies can design for their customers means they have a wider variety of experience than their OEMs’ engineers. Some may ask, “Do OEM companies take longer to reclaim their investments?” Unfortunately, the answer is yes, given that the properties of OEM differ from that of EMS. One of the most critical factors that an OEM should consider when outsourcing its manufacturing is the availability of skilled and experienced individuals who can do everything the company can do. That can help them improve their efficiency and add value to their business. In addition to being able to do everything the company can do, these individuals also have the necessary expertise and experience to help them grow their businesses.

    What are the Differences between OEM and ODM?

    What is the meaning of OEM?

    The full name of OEM is Original Equipment Manufacturer. In OEM, the brand owner must design new products and develop technology and sales development. First, they would sign a contract with a product manufacturer to let them produce the product according to the brand owner’s need and print it on their brand. Then, the brand owner would buy the product cheaply from the manufacturer.

    Advantages of an OEM Manufacturing Service

    If you have an idea for a product but don't have the time to manufacture it, you should consider using an OEM manufacturing service. These firms have the necessary expertise to produce products for major brands and can manufacture components or devices at much lower prices than traditional manufacturers. They can also meet all the requirements and conditions of delivery and management.
    Here are some reasons why an OEM might be a better option.

    Nowadays, a brand computer may purchase a computer from one company, print their brand, and sell to the market. While most OEMs sell business-to-business (B2B) products, a VAR(value-added reseller) is a third party that customizes and sells a product to a customer. An OEM generally sells on a business-to-business model, while a VAR sells directly to consumers.

    Regarding the design of products, those familiar with the electronic industry share their thought, "ODMs carry out the design by themselves while a brand company is responsible for the design of OEM products, right?" Yes, you got the point. As a result, OEM products are more personalized and feature a broader range of customization. However, OEM manufacturing is resource-intensive. Designers invest millions of dollars in research and development, and they would use the law to protect their design property.
    The cost of OEM manufacturing is a significant part of the overall process. Therefore, an OEM may be better for complex products or low volume. An EMS, on the other hand, may be better suited to low-volume, specialized, or niche products. As an OEM, you must find the right EMS provider that fits your product range and business model.

    What is ODM?

    The manufacturer may involve ODM (original design manufacturer) in work from research to design and after-sales service. The brand owner may just sign a contract with a manufacturer to print their logo on the product and buy the product from the manufacturer.
    What is ODM manufacturing? This type of manufacturing outsources the production of products for a specific brand. In other words, you can expect products that meet your specifications. This model can be particularly advantageous for smaller companies that lack the resources to invest in research and development. Generally, the products produced under this model fall into two categories: private label products, which are sold directly to the customer, and white label products, which are generic products sold under a company’s brand.

    ODM manufacturing is a type of outsourced manufacturing

    Outsourced manufacturing services are available for a variety of purposes. Whether creating a new product or upgrading an existing one, ODMs can help. ODMs are often more efficient than traditional manufacturers and have more control over their products’ design and production processes. In addition, they can upgrade their efficiency through automation and specially designed manufacturing software. You may wonder, “Are ODMs also able to sell products under their own brand?” They can do that in many cases. As a result, this option is ideal for those looking to expand their revenue quickly.

    OEM manufacturers build goods based on the specifications and designs of their clients. In contrast, ODMs do not own intellectual property or product designs. Therefore, they offer economies of scale, which means lower unit costs when the same design is built in a high volume. However, ODMs may not have the flexibility to incorporate their clients’ ideas, which can limit their customization options. If this is the case, an OEM may be your best choice.

    It's a private-label product

    Private label products, or Original Design Manufacturing (ODM), are made from pre-existing tooling and injection moulds and bear the customer’s brand. They are popular among Amazon sellers and importers. Still, some manufacturers are hesitant to sell them because they think that they do not have to adhere to the same regulations as other products. However, they must still meet safety and labelling regulations as any other product.

    It’s a fast track to market

    It’s cost-competitive

    Advantages and disadvantages of working with an ODM

    Working with an ODM (Original Design Manufacturer) can provide many advantages to businesses looking to develop and produce their products. Please refer to the following ones summarized by Viasion.
    Unfortunately, there are some disadvantages to working with an ODM. One of these is that it limits the client’s options and prevents them from making changes to the product design. Another issue is that the factory can take advantage of the client’s ideas without input or supervision. Finally, the factory has all the necessary equipment to make the product.
    Despite these disadvantages, working with an ODM can protect the client’s ideas. Manufacturers can also offer contracts that reassure the client that their ideas will be taken seriously.

    Viasion’s EMS Solution

    A good partner should help each other to make progress together. For example, viasion is delicate to help our customers make better PCB and PCBA and low-cost Chinese electronics manufacturing services, making our products performs better than their competitors. Besides, we use superior production technology to reduce costs for our customers.

    Through our experienced team, we can help you improve the efficiency of your project by implementing state-of-the-art equipment. This equipment will help us  to cut costs and improve the quality of your EMS electronics, we hope to be your most trusted EMS manufacturing company. 

    High Quality

    At Viasion, we are passionate about quality. We are committed to building high-quality electronics manufacturing China and have the necessary training and certifications to back it up. It ensures our customers can rely on us to find and supply them with the best possible quality.

    Low cost

    Viasion provides low-cost electronics manufacturing in China, it controls electronics manufacturing production strictly and uses mature technology in mass production, increasing production efficiency and decreasing production costs.

    You can also us for your electronics manufacturing demands. With a wide range of capabilities, Viasion is one of the best electronic manufacturing services companies in China. 

    Connect with us

    Get an Instant Online Quote Today

    Viasion Technology is your trusted partner & one-stop shop for PCB fabrication, components sourcing, PCB assembly and electronic manufacturing. With more than 16 years of experience, we have been supplying high-quality PCBs with competitive pricing for 1000+ customers worldwide. Our company is ISO9001:2015 Certified & UL Listed, and all our products are 100% E-tested and inspected by AOI & X-RAY to meet the highest industry standards. So please get an instant quote from our sales team now, and we will take care of the rest.

    Frequently Asked Questions

    Both terms are pretty similar; all refer to the fabrication of PCBs and the assembly of electronics. But electronics manufacturing services are more widely used. 

    Electronics manufacturing processes include the following: printed circuit board fabrication, electronics components outsourcing, PCB assembly, box build assembly, testing and inspections, etc. Generally speaking, electronics manufacturing services mean the customer only supplies relative files, and electronic contract manufacturing companies supply fully functional electronic devices. 

    Electronics manufacturing processes include the following: printed circuit board fabrication, electronics components outsourcing, PCB assembly, box build assembly, testing and inspections, etc. Generally speaking, electronics manufacturing services mean the customer only supplies relative files, and electronic contract manufacturing companies supply fully functional electronic devices.

    EMS contract manufacturing means contract production of electronics products. But OEM contract manufacturing also involves the design and development stage, except electronics manufacturing.

    Electronics manufacturing industry is very important for any electronics products. It normally includes circuit board production, EMS PCB or PCB assembly, box build assembly, final testing and inspection, etc.

    EMS manufacturing means electronics manufacturing, only involved in production. But ODM means Original Design Manufacturer. So besides the electronic manufacturing aspect, the development of electronic products is also a significant part.

    Viasion is one of the best contract electronics manufacturers in China. Our electronics manufacturing services include PCB bare board fabrication, circuit board assembly, turnkey box build assembly, final testing and inspection, labelling and packaging as customers’ requirements.