![]() ![]() Testers run probes across the board from component to component in a temperature-controlled environment. Static burn-in is the cheaper and quicker option that tests the board against a single criterion, typically heat or voltage. They each provide different stressors and are necessary depending on the board’s intended uses. Manufacturers use two main types of burn-in testing: Static and dynamic. Components operating at lower capacities during testing are much easier to replace early on. Preliminary component testing – Dynamic burn-in testing allows the PCBA manufacturer to monitor potential component issues early in the developmental cycle.This increases customer approval while reducing replacement costs that eat into profits. Fewer returns and replacement costs – The less a board design fails, the fewer replacements a manufacturer will need to send out.They can market boards capable of withstanding higher temperatures for heat-intensive machines, leaving other board designs free for less-resistant devices. Greater ability to meet customer needs – Knowing the extremes at which a board can function allows manufacturers to plan for the potential uses of their boards accurately. ![]() Reduced post-production failures – With the blueprints of the board, you drastically reduce the chances of losses occurring once complete assembly begins.Cheaper and easier repairs – Catching a catastrophic defect during the earliest days of production will make the issue much easier to fix.Benefits of Burn-In Testingīeyond just ensuring that new boards will not break down during early use, burn-in testing offers several benefits to PCB manufacturers. ![]() Once it clears this period, a device will run with minimal naturally occurring errors until it begins to near the end of its life. Burn-in testing helps to locate any defects that might affect a board’s infant mortality rate – that is, its likelihood to break down during the first weeks or months of use. Burn-in tests are sometimes referred to as Accelerated Lifetime Tests.Įlectronic devices generally have two significant periods in their life cycle at which they are most likely to fail: At the beginning and the end of their use. The point of the test is to simulate what the printed circuit board would endure when used for an extended period, similar to what crash-testing does for vehicles. If defects occur during a device’s earliest days of use, you’ll get ample time to examine and rectify them. The manufacturer then examines the board’s functionality to see what issues arose and whether any components or firmware failed. This typically happens for between 48 and 168 hours. Burn-in testing pushes these boards to the point where they usually fail to see whether these issues arise.ĭuring burn-in testing, technicians run a current through a prototype board, operating the board’s firmware while it is held in a high-temperature environment. Each board works within specific current and internal and external temperature parameters. Burn-in testing helps PCB manufacturers analyze how well a new board can handle excessive use and heat and whether these factors will lead to functional errors. ![]()
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