The Effect of Temperature and Humidity on Electronic Component Reliability

Introduction
Electronic components are the backbone of contemporary technology, and many different fields depend on their dependability and efficiency. Electronic components are sensitive to temperature and humidity, two environmental conditions that may shorten their lifespan and compromise their performance.

In this article, we will examine how changes in temperature and humidity may impact the performance, longevity, and functioning of electrical components. The performance and longevity of electronic systems may be guaranteed if manufacturers have a better understanding of the connection between temperature and humidity and the dependability of electronic components.

The Impact of Temperature on Electronic Component Reliability
Electronic components are sensitive to temperature changes, which may reduce their longevity and efficiency. Let’s take a closer look at how temperature affects the operation of various electrical parts:

Thermal Expansion and Contraction: Temperature fluctuations that occur during operation put electronic components at danger of thermal expansion and contraction. It is possible for cyclic stress to cause mechanical fatigue, which may then lead to taking this joints, broken wire bonds, and delamination. When these processes are accelerated up by heat, there is a greater likelihood that individual components may fail.

Electrical Performance: Temperature may cause variations in a wide variety of the electrical properties of electronic components, including resistance, capacitance, and inductance, to name just a few. When components are exposed to temperatures that are either above or below their normal functioning range, it is possible that some of their electrical characteristics may vary. Because of this, the signal may get distorted, and the component in issue may potentially completely break down.

Material Degradation: Electronic components are susceptible to temperature-accelerated material breakdown processes. Insulation, dielectric characteristics, and electrical conductivity may all suffer as a result of high temperatures because of the diffusion of impurities, chemical reactions, and physical changes in materials. Reduced performance, higher power consumption, and early failure are all possible outcomes.

Thermal Management: The reliability of electronic components may be severely impacted by improper heat management. Localized hotspots, thermal stress, and greater temperature differentials may all result from a systemic accumulation of excess heat. Integrated circuits (ICs) and power electronics are two examples of devices that might be negatively affected by this. Maintaining component dependability necessitates the use of heat sinks, thermal interface materials, and enough airflow as part of a comprehensive thermal management strategy.

The Role of Humidity in Electronic Component Reliability
As with temperature, humidity is a major environmental element that may compromise the functionality and durability of electronic parts. The impact of moisture on electrical components is something we should investigate:

Moisture Absorption: The infiltration of moisture may cause corrosion, electrical leakage, and material deterioration in many electronic components. Damage, short circuits, and decreased insulating qualities may be caused by moisture penetrating packing materials, printed circuit boards (PCBs), and other surfaces of components. Surface-mount devices (SMDs) and ball grid array (BGA) packages are two examples of moisture-sensitive electronics that greatly benefit from this.

Electrical Leakage and Conductivity: Contaminants on the surface of electronic components may improve their electrical conductivity if the humidity level is high. This may cause signal interference, short circuits, and leakage currents. significant-voltage applications or places with significant amounts of airborne pollutants are particularly vulnerable to problems with moisture-induced conductivity. LISUN has a wide variety of humidity chambers.

Material Compatibility and Degradation: The presence of moisture in the air may cause problems for the efficient operation of electrical components because it prevents the materials from effectively connecting with one another. When moisture-sensitive adhesives or coatings are subjected to high levels of humidity, for example, delamination or a reduction in adhesion strength may take place. The growth of mold is only one of the many material degrading processes that may be accelerated by excessive humidity. Other processes include corrosion of metal connections and the breakdown of polymers. As a direct consequence of these issues, the dependability and performance of the component may be compromised.

Temperature and Humidity Cycling: Cycling at different temperatures and humidity levels has been shown to have additive impacts on the reliability of electronic components. The combination of temperature cycling (which causes expansion and contraction) and humidity cycling (which causes absorption and loss of moisture) may hasten the processes of deterioration. Because of this, the components may deteriorate over time as a result of heat stress, material fatigue, and the formation of microscopic fractures or voids.

Figure: Humidity chamber

Mitigation Strategies and Testing
To guarantee the reliability of electronic components despite shifts in temperature and humidity, manufacturers put their products through a comprehensive battery of tests that use a broad range of approaches. Let’s take a look at some of the most common approaches:

Component Selection: It is of the utmost importance to choose electrical components with extreme care in line with their temperature and humidity requirements. When choosing components, it is important to take into consideration the temperature and humidity ranges that are anticipated. Components with higher tolerance levels and enhanced moisture resistance may be desirable for applications that run in harsher settings. This is because these characteristics let the component withstand larger amounts of wear and tear.

Encapsulation and Packaging: In order to stop moisture from getting inside, electronic components are encapsulated and packed using trusted procedures. This keeps moisture out of the components. Failures that are caused by moisture may be prevented by using moisture-resistant materials and procedures, such as hermetic sealing, conformal coating, and encapsulation. These methods are among others. These safety measures guarantee that the components will continue to operate correctly and dependably for as long as possible.

Environmental Testing: In order to determine how well and reliably an electronic component will function in a wide range of temperatures and humidity levels, it must undergo extensive environmental testing. These tests assess a component’s resilience to temperature and humidity swings by simulating real-world operating conditions. Manufacturers may enhance designs and fix risks by using the results of accelerated stress testing, which assist detect possible shortcomings.

Thermal Management: To keep temperatures under control and reduce thermal stress on electronic components, thermal management methods are necessary. High thermal conductivity in thermal interface materials and effective cooling systems are essential. Thermal management improves component dependability and longevity by keeping them within safe operating temperatures.

Humidity Control and Moisture Prevention: It is possible to reduce the occurrence of problems caused by moisture during the production, assembly, and storage of components by using humidity control techniques, such as humidity sensors, desiccant packs, or humidity-controlled storage settings. Maintaining component dependability and avoiding performance deterioration due to moisture absorption may be achieved with the use of moisture avoidance measures.

Failure Analysis and Reliability Testing: When a component fails, experts apply failure analysis methods to figure out why. Microscopical examination of defective parts, material characterisation, and the elimination of environmental variables (such excessive heat or dampness) are all part of this process. Potential failure mechanisms may be identified and component performance over time can be evaluated with the use of reliability testing, such as accelerated aging tests.

Conclusion
Electronic components are very vulnerable to changes in temperature and humidity. Manufacturers can’t guarantee electronic systems’ robustness, functionality, and lifetime without first understanding the impact of these environmental conditions.

Manufacturers may design and create electronic components that can resist the difficulties offered by changing environmental conditions by taking temperature and humidity constraints into account, utilizing suitable mitigation measures, and undertaking thorough testing.

The dangers associated with temperature and humidity may be reduced by careful component selection, encapsulation, thermal management, and humidity control. It is crucial for manufacturers to prioritize the evaluation of electronic component reliability under temperature and humidity variations to ultimately deliver products that meet the expectations of industries and consumers alike as technology continues to advance and more and more reliable electronics are required.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997