pcb

How to build a batch of Product Prototypes?

Today, most manufacturers use Surface Mount Technology as a preferred method in manufacturing PCBs. However, hand/manual soldering is also useful when used effectively in the manufacturing process.  Read more to find out. An easy-to-understand step-by-step guide to manufacturing small batches of box builds.  When a printed circuit board is manufactured certain important steps in the process make the boards reliable. Undoubtedly the components and processes are essential, while prompt and efficient communication is the key to building a PCB. At several stages of the process, decisions are to be taken by both the customer and the manufacturer to thereby design and develop a product that matches the requirements. What are the steps generally involved in the process of building a product prototype (Box Build)?   Generally, the process for a fully functional box build begins with the customer providing data or specifications of the required product/prototype and communication continues until delivery.     Citing our recent project to highlight the process For your better understanding, here’s our recent project as an example to outline the complete process of building a product prototype. The customer placed an order for a small batch of prototypes that would undergo a series of tests and evaluations. A Step-by-step process involved in the process 1. Creating an Electrical Schematic Diagram This Electrical Schematic is only a sample and not that of the board. This is a sample only: Circuit layout design Firstly, the customer provided us with all the necessary details required to build the PCB. Then, the Electrical schematic diagram was designed for the circuit depending on the data provided. The schematic is very useful for building the PCB and equally valuable when troubleshooting. After that, the GERBER file is generated once the customer takes a final look before the PCB is sent for fabrication.  Once the board is fabricated, driven by the electrical requirements, the type and style of the components to be used were decided. In general, although the manufacturer decides the configurations of the resistors, capacitors and diodes depending on the electrical requirements, the dimensions of the board requested by the customer influence the size of the components and the overall appearance of a finished PCBA. Fabricated PCB 2. Choosing components and the soldering process involved in PCBA Next, through a volley of discussions, we decided to use a combination of through-hole and surface-mount components that were to be manually soldered on the fabricated PCB. A Bill of Materials (BOM) was generated and the components were procured by our procurement team.   Even-though through-hole is an older technology and a more modern technology such as the SMT (Surface Mount Technology) is preferred by manufacturers, manual soldering of components has its footing in certain areas of production. Especially for prototyping circuit boards or for the production of a small batch of PCBs, manual soldering using through-hole or surface mount components or a combination is efficient. However, the soldering method also depends on the type of capacitors or resistors chosen. Manual soldering Completed board (reverse) 3. Designing and Fabricating the 3D printed enclosure for the PCBA Printing the enclosure in progress: Theta 3D printer Simultaneously, our design team began the process of designing the enclosure. It was designed according to the size of the board and its components. Using an FDM printer, Theta by IONIC3DP, the enclosure was 3D printed and built in-house. 3D printed enclosure and fully functional PCBA 4. Cleaning and testing the PCBA Once the PCB is assembled, each and every board is cleaned thoroughly. Before running basic checks and tests of functionality.  5. Installing the PCBA and completing the prototype Finally, post testing the PCBA, the board is installed in the 3D-printed enclosure. Wiring and switches were added and the fully completed prototype was tested once again before packing it. A batch of 120 fully assembled prototypes was completed, packed securely and shipped to the customer.  Ark Circuitry Ventures Is An EMS Provider And Specialise In Providing End-To-End Services That Can Be Tailor-Made To Meet Your Requirements.  Let’s talk for more information.  Call us on: +91 88259 58660 Mails us at: arkcircuitry@gmail.com Visit us at: https://arkcircuits.com Facebook Twitter Linkedin Instagram Recent Blogs Why is cleaning a PCBA an essential process in manufacturing? Regan January 5, 2023 The functioning of electronic devices relies heavily on circuit boards. Care needs to be taken when … Read More 15 challenges in the Electronics Manufacturing Process Suneyna December 21, 2022 Electronics Manufacturing Services are the backbone of manufacturing for companies to produce … Read More

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Choosing the right test/inspection for a printed circuit board.

Why do PCB manufacturers encourage customers to opt for inspection or to run tests on the PCB? Is it really necessary? How do you avoid the hassle of reworking your product? What are the different tests available? Read this post for information.  Why is an inspection/test required? Before the device or system leaves the manufacturing unit a thorough inspection of the PCB mitigates problems in a  manufactured product. This helps companies cut down expenses and valuable resources.  Sometimes even as simple as solder flux can interfere with the functionality of the PCB  and using a non-clean low-residue solder paste is suggested. What are the different tests available? There are 3 widely used tests to check the functionality, durability and accuracy of the system : automated optical inspection, X-ray Inspection and burn-in test.   Automated Optical Inspection (AOI) The AOI uses cameras to capture pictures of the PCB and then compares them with detailed schematics to check errors. when capturing pictures, light is focused from different angles on the board. The images are put together to create a full profile of the board. This system helps in the early detection of nodules, scratches on the board, incomplete or thinning solder, open circuits, missing components and short circuits.  Relying on cameras, the AOI is limited to what is visually detected and is unable to inspect hidden connections, especially in multi-layer boards. Moreover, as external light is used, there could be errors during inspection due to the emerging shadows. Hence, depending on the complexity of the board manufacturers use a combination of inspections to ascertain faults or errors in a board. X-ray Inspection (AXI) For boards that are tightly packed with several components (especially small ones) and for multi-layer boards, AOI inspection might not be a suitable test. AOI only detects errors visually from the surface in comparison to X-ray inspection which provides better clarity and inspects the PCB in detail.  Besides, X-ray passes directly through objects and does not need external light as required in AOI. Furthermore, it helps detect issues by examining the board thoroughly as it goes beyond just the surface.  However, this method also has its limitations. The process is extremely time-consuming and setting up an X-ray inspection system is expensive. AXI requires an experienced operator to use the machine which is also an added expense. This leads to exploring the third option, the burn-in test.  Burn-in Test A burn-in test can enable the early detection of potential problems and helps keep the cost of testing and replacing parts at the lowest. In electronic devices, a burn-in test can determine the maximum temperature it can sustain. A burn-in may also be a part of routine maintenance or repair. The malfunction might not be straightforward until the hardware is warmed/cooled to a certain temperature or checked for humidity as a factor. Tests under these various environmental parameters could aid in diagnosing the problem and fixing it. The burn-in test can be performed for an entire system or individual components. The system is operated for extended hours or extreme working conditions to check its functionality and reliability. Running a quick burn-in test to check the PCBs Identifying defects at an early stage of the manufacturing process is the most practical way of reducing costs and allows errors to be rectified.  At Ark Circuitry we use high-quality components to ensure the proper functioning of a PCB. We also encourage customers to opt for testing as it is not only important to check the functionality of the product but also to avoid danger when used in highly sensitive applications. Ark Circuitry Ventures Is An EMS Provider And Specialise In Providing End-To-End Services That Can Be Tailor-Made To Meet Your Requirements.  Let’s talk for more information.  Call us on: +91 91764 18660 Mails us at: arkcircuitry@gmail.com Visit us at: https://arkcircuits.com/ Facebook Twitter Linkedin Instagram Recent Blogs Choosing the right test/inspection for a printed circuit board. Suneyna S JoJo November 4, 2022 Why do PCB manufacturers encourage customers to opt for inspection or to run tests on the PCB? Is it … Read More The process of a small run SMT Production Suneyna S JoJo October 27, 2022 Ever wondered what makes it important for your electronics to work efficiently apart from its … Read More

Choosing the right test/inspection for a printed circuit board. Read More »