Blog

Uncover the latest PCB innovations, expert insights, and industry trends with PCBX's comprehensive blog. Stay ahead of the curve in PCB design, manufacturing, and assembly.

Printed circuit board Blog - PCBX

PCB Design

The PCB Design Resource Channel is a worthwhile location that provides electronic engineers and designers with top-notch resources and tools to design printed circuit boards. In this section, the latest guides in design, tutorial videos, software tools, example projects, and best practices are organized together for reference on how best to go about optimizing the design process for better work efficiency and product quality.

PCB Design - PCB Expert Manufacturing - PCBX

PCB Resources

Your comprehensive PCB knowledge resource. Explore in-depth guides on PCB design, material selection, fabrication techniques, and industry trends. Empower your PCB expertise today! 

PCB Resources - PCB Expert Manufacturing - PCBX

PCBA Resources

PCBX: Master the art of PCB assembly. Delve into expert guides on PCB assembly processes, techniques, and quality control procedures. Elevate your PCB assembly skills now! 

PCBA Resources - PCB Expert Manufacturing - PCBX

Printed Circuit Boards (PCBs) have been a staple in the world of electronics assembly, repair and prototyping for a long time now and isopropyl alcohol (IPA) is the recommended solvent for cleaning them. It is highly accessible, inexpensive, quick evaporating and is usually compatible with standard types of PCB materials and is commonly used to remove light flux residues, dust, oils, and fingerprints. But with the emergence of high density, high resolution, high speed, and demanding reliability and environmental requirements in electronics, IPA is no longer adequate for many present day applications. This article analyzes the shortcomings of isopropyl alcohol and offers practical and effective alternatives to cleaning with PCBs to satisfy the requirements of today's engineering and manufacturing.IPA is suitable for simple applications, but it has serious limitations.It does not dissolve modern, no-clean, lead-free fluxes with synthetic resins and activators, leaving behind residues which can cause corrosion, signal interference and component failure, particularly under humidity conditions. The high surface tension of IPA means it will not go through small gaps under BGAs and microvias and it is highly flammable and must be used very carefully. Furthermore, its volatile organic compounds (VOCs) emissions are incompatible with increasing environmental regulations.<h3>Key Factors When Selecting PCB Cleaning Solutions</h3>When considering alternatives to IPA, consider the following factors:Material compatibility: Compatibility with substrates, solder masks, components, plastics and metals.Flux removal properties: Ability to remove flux, solder paste, oils, adhesives and particulates.Penetration: Adequate for penetration but not so fast that there is moisture damage.Low-risk formulas: Toxicity and flammability.Environmental impact: Biodegradability, low VOC, easy to handle waste.Practicality: Applicable to manual, ultrasonic or automatic cleaning systems.<img src="https://img.pcbx.com/dev/file/image/article/20260507/3c2d89c8408843e395bd9c0c0bdd7ebd.jpg" alt="Key Factors of PCB Cleaning Solutions-PCBX" data-href="" style="width: 100%;"/><h3>Top Alternative PCB Cleaning Solutions</h3>Denatured AlcoholDenatured alcohol is an easy to get alternative to IPA, and it is made by mixing ethanol with additives to make it unpalatable. It has properties of rapid evaporation and good solvency with most common fluxes.May not be suitable for sensitive surfaces, such as in a laboratory.Flammable, varies in purity due to formulation. Through hole assemblies, general reworking and light to medium residues.AcetoneAcetone is a strong fast evaporating solvent that is good for heavy/ stubborn residue such as rosin fluxes, cured solder paste, adhesive residue, etc.Very expensive.Will attack some plastics, conformal coatings and sensitive parts; very flammable.Heavy duty cleaning when material compatibility has been determined.Deionized Water with Mild DetergentDeionized (DI) water along with a pH balanced electronic detergent is a great option for environmentally friendly and non-toxic cleaning. Mineral deposits that cause conductivity problems are avoided with DI water.Be safe with most materials, non flammable and non toxic.Drying of the product will be slower; complete drying must be done to eliminate corrosion.Environmentally conscious workshops, schools and boards.Specialty Electronic Flux CleanersElectronic cleaners that are used professionally are designed to work with PCBs. They are frequently formulated with corrosion inhibitors, solvents and surfactants to safely remove difficult residues.Electronics friendly, often low VOC or non-flammable, and works well on high density boards.More expensive than cheap solvents.industrial assembly, high reliability devices and automatic cleaning lines.Ethanol (Ethyl Alcohol)High purity ethanol (90% or more) has similar characteristics to IPA, good solvency and rapid evaporation. It is a suitable alternative if IPA is not available.Similar to IPA, but more widely applicable.Flammable; additives may be used in consumer grades that leave a residue.General repairs, prototyping and light cleaning.Water‑Based and Semi‑Aqueous Cleaning SystemsWater based and semi aqueous cleaners provide reliable results for medium and high volume production, while also containing fewer VOC's and causing less fire hazard. They can be used with ultrasonic or spray‑under‑pressure cleaning equipment and are effective in getting into gaps under the components.Good penetration, high reliability and eco-friendly.Automotive, Industrial, Medical and Telecommunications applications that require PCB manufacturing.<img src="https://img.pcbx.com/dev/file/image/article/20260507/bcecffdf264d4f84bc03add094361ff7.jpg" alt="Best Alternative PCB Cleaning Solutions-PCBX" data-href="" style="width: 100%;"/><h3>Best Practices for Safe and Effective PCB Cleaning</h3>Unplug and clear away any loose material first.Use cleaner using soft brush or a lint free swab and do not spray directly.Gently clean around fine traces and parts.For water‑based cleaners, rinse with DI water and dry completely.Either bake in low temp or use compressed air to get zero moisture.Work in a well‑ventilated area and use appropriate personal protective equipment.While isopropyl alcohol can still be effective at simple PCB cleaning tasks, today's electronic devices require solutions that are more capable, reliable, and sustainable. Whether it's denatured alcohol and acetone, specialty electronic cleaners or water-based systems, the alternative choice provides a cleaner, longer-lasting service life, a safer environment and effective support for environmental objectives.From prototyping to high volume board assembly to repairing critical electronics on mission-critical applications, the type of cleaning solution you use directly impacts performance and reliability.PCBX specializes in providing cutting-edge solutions for PCB care and maintenance, tailored to meet the latest challenges in electronic device design. Manufacturers and engineers can get consistent, zero-defect results in each assembly and repair with our high-performance cleaners and application support, which are designed to be both eco-friendly and easy to use.

Discover the top isopropyl alcohol (IPA) alternatives for PCB cleaningand safe, effective, and sustainable solutions to boost PCB reliability

Modern Approaches to PCB Cleaning Beyond Isopropyl Alcohol

Printed Circuit Boards (PCBs) are the most fundamental components of all electronic equipment, whether it is a small consumer device or a large industrial control, and their mechanical and electrical integrity directly influences the performance, reliability, and life of the equipment. Among the least obvious and most prevalent threats to the functionality of PCBs are oxidation and corrosion, but the good news is that in most cases, repairing the damage is possible with proper techniques, equipment, and a logical process. Be it a hobbyist working on a home electronics project or a technician in charge of maintaining critical industrial PCBs, this guide is a summary of years of PCB engineering experience to make them fix oxidation and corrosion problems efficiently and put in place preemptive actions to avert future problems.<h3>Understanding PCB Oxidation and Corrosion</h3>To begin with, it is essential to draw the line between these two related but different problems because they have to be repaired with slightly different approaches. Oxidation is the reaction between the copper trace material on a PCB and oxygen in the air to form an oxide layer over the copper-trace, a thin, dull, non-conductive oxide material, a thin layer of red cuprous oxide or black copper oxide, that interferes with the flow of electrical signals and breaks the connections. The more serious electrochemical corrosion, which is an environmental-induced process such as moisture, salt or chemical contaminants, may manifest as greenish (copper carbonate) or bluish patina, tiny pits or even total trace fracture. Both problems may cause electrical resistance to soar higher up to several ohms where a healthy trace would have been 0.01 ohms to more than 1 ohms in damaged regions, compromising signal integrity and causing intermittent device malfunctions, poor performance, or a total failure of a board.<img src="https://img.pcbx.com/dev/file/image/article/20260319/4a71964c998e467d9bdc516c10e0b74e.jpg" alt="Understanding PCB Oxidation and Corrosion-PCBX" data-href="" style="width: 100%;"/><h3>Key Causes to Address First</h3>To repair, the very first step is to determine the causes of oxidation and corrosion because it will not only direct the current repair but also allow you to take specific preventive steps. The responsible culprits of most PCB degradation are four major culprits:Moisture and Humidity: Humidity is too high (more than 65%), creating a water film, which serves as an electrolyte, causing reactions to speed up. Long-term exposure to humidity of 80% PCBs is in grave danger.Chemical Contaminants: Flash residues, soldering residues, or industrial chemicals (such as sulfur compounds) degrade protective metals and accelerate corrosion.Temperature Changes: Repeating heating/cooling leads to condensation, whereby a humid atmosphere of oxidation is formed.Poor storage / Handling: PCBs are susceptible to poor storage and handling in unsealed storage, bare-hand contact (transfer of sweat salts), and unprotected with protective coatings.<h3>Essential Tools & Materials</h3>The appropriate tools make the repair accurate and durable. We suggest the following necessities:90 per cent isopropyl alcohol (IPA) to clean residue-free.No metallic soft brush, microfiber cloth (to prevent scratching marks)Solder iron (300-350℃), and rosin-core solder, desoldering wick/pump.Multimeter (check continuity, aiming at less than 0.05 ohms to make good connections)Acrylic or epoxy conformal coating to protect after repair.Conductive epoxy or jumper wires (in case of extreme trace damage)To prevent the latter, always work in a well-ventilated place and use anti-static gloves.<h3>Step-by-Step Repair Process</h3>Repair of PCB oxidation and corrosion is a step-by-step process that can only be done in a gentle manner to not cause additional damage to the board. To re-assemble your PCB back to full functionality, follow the following step-by-step instructions:Inspect and Evaluate: Visually identify oxidation (dull discoloration) or corrosion (green/pitted) with the help of a magnifying glass. Test with multimeter to determine bad traces.Clean Good: Wipe down using IPA and a soft brush. In case of intractable corrosion, apply 1:1 vinegar-water paste (do not use too much vinegar, as it is acidic) and rinse with IPA and dry completely with compressed air.Repair Damaged Traces: In the case of minor pitting, add fresh solder. To make breaks, apply jumper wires (conducting epoxy) of trace width, which cures according to manufacturer directions. Test continuity post-repair.Replace Broken Parts: Desolder bad components (300℃), clean pads and re-solder new parts- make sure solder joints are shiny and concave (no cold joints).Apply Protective Coating: Spray conformal coating on repaired areas, and then 24 hours to dry at room temperature to provide long-term protection.<h3>Advanced Repairs for Severe Damage</h3>Basic cleaning and soldering is not always necessary in the case of large-scale corrosion: i.e. complete trace breakage, seriously damaged solder pads, or inner-layer damage. Such sophisticated processes may be used to rescue otherwise inoperative boards:Conductive Epoxy: Fills trace cuts that cannot be soldered-cure 12-24 hours.Pad Rebuilding: Repair kits are available to restore corroded solder pads with copper foil to re-solder them.Professional Re-Plating: professional services should be used to re-gold or re-tin plate critical boards (industrial/medical) to recover functioning.<img src="https://img.pcbx.com/dev/file/image/article/20260319/74ca822f8bcb4a5baa008bb26a15e971.jpg" alt="Corrosion and Oxidation of PCB-PCBX" data-href="" style="width: 100%;"/><h3>Prevention Tips</h3>It is much less expensive and time-consuming to prevent oxidation and corrosion than to mitigate the effects of either one once it takes place. These are some simple but effective best practices that will help you to dramatically increase the life cycles of your PCBs:Conformal coating should be done upon assembly/repair.Place PCBs in anti-static bags, desiccated (less than 50% humidity).House electronics in closed enclosure in extreme conditions.Clean and check PCBs every quarter (monthly, when used in industry) in time to detect early damage.<h3>Solving Common Problems</h3>If you hit roadblocks: Corrosion resistance: Dilute citric acid (5-10) and apply it to 30 seconds, rinse and dry. Solder does not stick: Wipe off and apply flux to enhance sticking. Constant high resisting: Check inner-layer damage--tested by professional services.Corrosion and oxidation of PCB is a solvable process when equipped with the proper knowledge, equipment, and time. We are convinced in giving power to users to keep their PCBs in good condition, whether it is the surface oxidation or a serious corrosion, the above steps will provide a good long-term solution to the problem. You will be able to increase the lifespan of PCB, minimize down-time and expensive replacements by fixing the real problems, employing high quality materials and adhering to the tips of proactive prevention. In complicated repairs or expert advice, place your faith in the hands of PCBX to ensure your electronics are functioning at our best.

PCB oxidation (copper-oxygen reaction) and corrosion (environmental damage) stem from moisture/chemicals; fixes include tools, repairs, prevention and troubleshooting, manageable with skills.

How to Fix PCB Oxidation and Corrosion

SMD components, which include chips and ICs, have become standard in the fast-changing world of electronics due to their compactness and efficiency in electronic devices. Removing such components is an important skill for any person engaged in electronics repair or upgrades of smartphones, computers, or other high-tech equipment. Compared to all the available methods, hot air is exceptionally precise and controlled. It is an essential technique in professional work and even among do-it-yourself electronics.A complete guide on how to safely and effectively remove SMD chips with a hot air rework station is explained herein. Understanding this technique is very important for ensuring the integrity of the PCB and extending the lifespan of the device.<h3>Importance of Removing the SMD Chip in Modern Electronics</h3>SMD chips are soldered directly onto the surface of printed circuit boards without using through-hole technology. This surface mount technology allows for more compact designs but requires special methods for repair and replacement of components because they are very fragile.Knowing how to remove SMD chips is important for several reasons, such as conducting repairs, upgrading old components, or recycling and salvaging valuable electronic parts. As sizes go smaller and capabilities get larger, a person's ability to handle the SMD component with precision becomes more important.<img src="https://img.pcbx.com/dev/file/image/article/20250122/a7fef24c0dc742fba07e5ef5edd16b38.jpg" alt="SMD Chip Removal with Hot Air-PCBX" data-href="" style="width: 100%;"/><h3>Why Hot Air is Preferred for SMD Removal</h3>Precision: Hot air rework stations allow for precise temperature control and airflow management, minimizing the risk of unintentional damage to the PCB or nearby components.Versatility: These stations can handle a wide range of electronics and component sizes, from small resistors to larger ICs, making them indispensable in diverse repair scenarios.Time Saved: Hot air increases the effectiveness of the method used for de-soldering and will eliminate any residual leftovers that are held on to some components. Also, with proper technique, ensure the desoldering of component parts in place.Non-Contact Method: No physical contact required at the surface since the method relies on air blasts for SMD chip removal compared to the case with soldering irons.<h3>Tools and Equipment Needed for SMD Chip Removal</h3>To ensure effective and safe SMD chip removal using hot air, gather the following tools and equipment:Hot Air Rework Station: Should provide for temperature and airflow controlsFlux Pen: This tool assists with uniform application of flux to create easier melting soldering and reduces oxidation.Fine Tip Tweezers: Useful to handle SMD components by using fine tips after the solder melts, without displacing the sameESD Safety Gear: wrist straps and anti-static mats ensure sensitive components will not be discharged through electrostatic build-up.Desoldering Braid or Pump: Used for cleaning residual solder from PCB pads.Magnification Tools: Optional, but useful for precision work on small components, ensuring thorough cleaning and inspection.&lt;button class="center btn-lg" data-href="/order/manufacturing/pcba"&gt;Get an Instant Quote for PCB Manufacturing & PCB Assembly&lt;/button&gt;<h3>Step-by-Step Guide for Removing SMD Chips with Hot Air</h3>Prepare Your Workspace: Ensure your work area is clean, organized, and ESD-safe. Position all necessary tools within easy reach, and ensure your workspace is well-ventilated to manage fumes.Hot Air Station Setup: Turn hot air rework station to a temperature of between 350°C to 380°C (662°F to 716°F). This is usually a good range for the job but might need to be adjusted depending on the flux type used for soldering the PCB. Airflow should be minimum to avoid moving other components in the vicinity without denying a proper heat application.Add Flux: Use the flux pen to apply a small amount of flux around the circumference of the SMD chip. This promotes even heat distribution, aiding the solder's transition to a molten state.Heat the SMD Component: Position the hot air nozzle approximately 5-10mm above the chip. Move the nozzle in small circular motions to ensure even heating of both the component and the solder joints.Monitor the Solder: Closely observe the solder joints for signs of melting. As the solder becomes shiny and fluid, it indicates readiness for removal.Carefully Remove the SMD Chip: Once the solder is sufficiently melted, use tweezers to gently lift the SMD chip. Apply steady, gentle pressure to avoid damaging the PCB or lifting the pads.Clean the PCB: Use a desoldering braid or pump to remove any excess solder, preparing the area for a new component placement or further repairs. Cleaning ensures a smooth, conductive surface for future soldering.Inspect and Test: With the aid of magnification tools, inspect the cleaned area for any potential damage, such as lifted pads or bridged connections. Conduct standard electrical tests on the board to confirm the integrity of the remaining components.<h3>Considerations and Potential Pitfalls</h3>Temperature Control: Avoid heating excessively as SMD components will get damaged. The use of foul fumes could be hazardous if not properly ventilated and taken precautions with.Precision Handling: Let the hot air tool be handled securely and make sure it does not come into contact with the PCB because any accidental contact with it can cause damage.Post-Removal Testing: Testing the functionality of surrounding components post-removal is essential to ensure successful repair without collateral damage.<h3>Advantages of Hot Air Rework Stations</h3>Hot air rework stations are favored in the electronics repair industry for their flexibility, ease of use, and precision. They not only function as primary tools for soldering and desoldering tasks but also allow for efficient workflows when handling intricate electronic repairs. Moreover, the non-contact nature of their operation reduces the risk of heat-related damage during repairs.<img src="https://img.pcbx.com/dev/file/image/article/20250122/a1c2dfd44d8d4156a67353f96655fc9d.jpg" alt="SMD Chip Removal with Hot Air-PCBX" data-href="" style="width: 100%;"/>Proficiency in hot air SMD chip removal techniques is, thus, quite critical to any individual either working with electronics repair or maintenance. This in return makes sure that devices are efficiently and reliably repaired, products will last longer, and performance is revitalized. Practice, patience, and attention to detail, along with the right tools and safety precautions, will be some of the ways to successfully handle SMD components, making this technique essential in modern electronics repair.

Mastering hot air rework to remove SMD chips ensures precise control, protects the PCB, and is vital for effective electronics repair and upgrades.

PCBX.com Resources

Your source for industry knowledge, news, and expert insights

Latest Posts

Article