Technical Library: baking pcb standard (Page 1 of 4)

JUKI PCB SMT Pick and Place Machines: The Gold Standard

Technical Library | 2023-09-16 07:16:54.0

JUKI is a leading manufacturer of SMT pick and place machines, and their products are known for their high quality, precision, and reliability. In this article, we will discuss the benefits of using JUKI PCB SMT pick and place machines, including: High accuracy and precision Fast production speeds Flexible capabilities Reliable performance

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Understanding The Crucial Role Of Dust Collectors In PCB Depaneling Machines

Technical Library | 2023-11-20 09:56:38.0

Understanding The Crucial Role Of Dust Collectors In PCB Depaneling Machines Precision is paramount in PCB manufacturing, but it must go hand in hand with cleanliness. The intrusion of dust and debris can wreak havoc on delicate electronics. This article explores the pivotal role of dust collectors, their operation, and their necessity for various PCB depaneling machines. The Dust Collector's Crucial Function Dust collectors, also known as dust extractors, play an indispensable role in PCB manufacturing. When a PCB depaneling machine or a Laser PCB Depaneling machine is in operation, it generates a significant amount of dust. The dust collector promptly engages its vacuum motor to suction fine particles off the PCB, directing them to a collector equipped with a filtration system. Which Models Of PCB Depanelers Require Dust Collector? Several PCB depaneling machines necessitate dust collectors to ensure precision and cleanliness, including: I.C.T-5700 Offline Depaneling Machine, high precision, easy manual operation, dual platform, high efficiency. I.C.T-IR350 In-line depaneling machine, high precision, rapid operation, suitable for integration into the SMT production line for Industry 4.0 and AI automated production. I.C.T-LCO350 Laser cutting ensures cutting accuracy of 0.002, ideal for precise cutting requirements. I.C.T-100A Desktop PCB depaneling machine with compact size and high precision, suitable for smaller-scale operations. The Science Behind PCB Dust Collectors To prevent charged dust particles from adhering to PCBs, PCB depaneling machines are equipped with ionizing guns. These devices emit ions that neutralize static charges, making dust particles less likely to stick to freshly cut PCBs. The Vacuum Effect: Suctioning Away Dust During PCB depaneling, a cloud of dust is produced. The dust collector utilizes a robust suction system, often powered by vacuum motors, to draw dust away from the work area. Collected dust is transported to a designated collection point within the dust collector. A Difference In Design: I.C.T-5700 Vs. I.C.T-IR350 The placement of the dust collection apparatus distinguishes PCB depaneling machines. I.C.T-5700 has a bottom-mounted system capturing falling dust, while I.C.T-IR350 features a top-mounted system preventing dust settling on the work surface. This strategic difference ensures efficient removal of dust and debris, guaranteeing a clean and precise manufacturing process. Check: If you want to learn about the comparison of I.C.T-5700 and I.C.T-IR350. The Importance Of Filter Replacement The efficiency of a dust collector relies on its filter, necessitating periodic replacement every 1-3 years, depending on usage frequency. Regular filter maintenance ensures optimal performance. Dust Collectors: Keep Your PCB Manufacturing Clean And Precise Precision in PCB manufacturing is not solely about cutting-edge machinery but also about cleanliness. If you seek a dust collector for your PCB depaneling machine, contact us today to explore your options. Ensure your operations maintain cleanliness, efficiency, and meet the high standards of modern PCB manufacturing. Don't let dust compromise your precision – let's keep it clean together!

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Understanding The Crucial Role Of Dust Collectors In PCB Depaneling Machines

Technical Library | 2023-11-20 09:56:42.0

Understanding The Crucial Role Of Dust Collectors In PCB Depaneling Machines Precision is paramount in PCB manufacturing, but it must go hand in hand with cleanliness. The intrusion of dust and debris can wreak havoc on delicate electronics. This article explores the pivotal role of dust collectors, their operation, and their necessity for various PCB depaneling machines. The Dust Collector's Crucial Function Dust collectors, also known as dust extractors, play an indispensable role in PCB manufacturing. When a PCB depaneling machine or a Laser PCB Depaneling machine is in operation, it generates a significant amount of dust. The dust collector promptly engages its vacuum motor to suction fine particles off the PCB, directing them to a collector equipped with a filtration system. Which Models Of PCB Depanelers Require Dust Collector? Several PCB depaneling machines necessitate dust collectors to ensure precision and cleanliness, including: I.C.T-5700 Offline Depaneling Machine, high precision, easy manual operation, dual platform, high efficiency. I.C.T-IR350 In-line depaneling machine, high precision, rapid operation, suitable for integration into the SMT production line for Industry 4.0 and AI automated production. I.C.T-LCO350 Laser cutting ensures cutting accuracy of 0.002, ideal for precise cutting requirements. I.C.T-100A Desktop PCB depaneling machine with compact size and high precision, suitable for smaller-scale operations. The Science Behind PCB Dust Collectors To prevent charged dust particles from adhering to PCBs, PCB depaneling machines are equipped with ionizing guns. These devices emit ions that neutralize static charges, making dust particles less likely to stick to freshly cut PCBs. The Vacuum Effect: Suctioning Away Dust During PCB depaneling, a cloud of dust is produced. The dust collector utilizes a robust suction system, often powered by vacuum motors, to draw dust away from the work area. Collected dust is transported to a designated collection point within the dust collector. A Difference In Design: I.C.T-5700 Vs. I.C.T-IR350 The placement of the dust collection apparatus distinguishes PCB depaneling machines. I.C.T-5700 has a bottom-mounted system capturing falling dust, while I.C.T-IR350 features a top-mounted system preventing dust settling on the work surface. This strategic difference ensures efficient removal of dust and debris, guaranteeing a clean and precise manufacturing process. Check: If you want to learn about the comparison of I.C.T-5700 and I.C.T-IR350. The Importance Of Filter Replacement The efficiency of a dust collector relies on its filter, necessitating periodic replacement every 1-3 years, depending on usage frequency. Regular filter maintenance ensures optimal performance. Dust Collectors: Keep Your PCB Manufacturing Clean And Precise Precision in PCB manufacturing is not solely about cutting-edge machinery but also about cleanliness. If you seek a dust collector for your PCB depaneling machine, contact us today to explore your options. Ensure your operations maintain cleanliness, efficiency, and meet the high standards of modern PCB manufacturing. Don't let dust compromise your precision – let's keep it clean together!

I.C.T ( Dongguan ICT Technology Co., Ltd. )

How to Choose the Right PCB Coating Machine Line

Technical Library | 2023-11-07 09:36:38.0

How to Choose the Right PCB Coating Machine Line Selecting the ideal equipment for your PCB coating line can be a complex task. In this article, we will guide you through the critical components of a standard PCB coating machine line and their solutions to common challenges. We'll delve into the line's composition, including the elevator, transfer station, coating machine, inspection station, curing oven, and their interconnectedness through a return conveyor. Let's explore each element and understand its role. Components of a PCB Coating Machine Line: Elevator: The PCB coating process starts with an elevator, efficiently transporting PCB boards to the next stage. Transfer Station: After the elevator, boards are conveyed to a transfer station, preparing them for the coating process. Coating Machine: The heart of the PCB coating line is the coating machine. We offer a range of coating machines, including I.C.T-T550, I.C.T-T550U, I.C.T-T600, and I.C.T-T650. Inspection Conveyor: Following the coating process, the boards move to an inspection station. The second transfer station is equipped with LED lights and a blue glass cover, enabling operators to closely inspect the coating quality. This feature is vital for ensuring consistent, dust-free coatings. Curing Oven: For UV-curable adhesives, we provide a UV curing oven to effectively solidify the adhesive. Return Conveyor: Beneath the entire line runs a return conveyor, connected to the elevator. This conveyor system efficiently returns PCBs from the last elevator to the first one, reducing manual handling and streamlining operations. The Advantages of the PCB Coating Line Design: 1. Easy Accessibility: The operator's station is strategically located beside the coating machine, ensuring easy access for setup and adjustments. 2. Enhanced Efficiency: The integrated return conveyor eliminates the need for manual transport, optimizing workflow. 3. Quality Control: The inspection station with the blue glass cover enables operators to inspect coatings for quality and cleanliness. 4. Dust Prevention: The blue glass cover also serves as a barrier to prevent dust contamination on freshly coated PCBs. Selecting the right PCB coating machine line is essential for achieving quality and efficiency in your operations. Our meticulously designed equipment line, along with its well-engineered components, can help you attain superior results. If you have further questions or need assistance in choosing the best solution for your specific requirements, please do not hesitate to contact us. We are committed to providing solutions that meet your needs and exceed your expectations.

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Crafting an Efficient SMT Conformal Coating Line for Double-Sided PCBA

Technical Library | 2023-11-09 08:53:45.0

Crafting an Efficient SMT Conformal Coating Line for Double-Sided PCBA In the intricate realm of electronics manufacturing, selecting the ideal SMT conformal coating line can seem like a challenging quest. The pursuit of a solution that seamlessly integrates efficiency, reliability, and performance is the ultimate goal. In this article, we embark on a journey to unravel the secrets of a standard SMT conformal coating line, using a captivating visual guide as our compass. The Symphony Of Components In An SMT Conformal Coating Line Picture a finely orchestrated symphony, with each instrument playing a unique role in this PCB coating process. The star performers in this lineup include: Transfer Conveyor: These act as the stage where the PCB's journey begins. Think of them as the entry and exit points for your precious boards, allowing a smooth, choreographed dance through the line. 1st Coating Machine: As the first movement in this musical journey, this machine, partnered with the initial curing station, lays down the foundation – applying adhesive to one side of the PCB. Inspection Conveyor: After the initial curing, our inspectors take center stage, using these transfer stations to carefully evaluate the coating's quality. 1st Curing Oven: This is where the magic happens. The first curing oven solidifies the adhesive applied in the previous act, setting the tone for a flawless performance. Flipper Machine: The flipper machine takes the spotlight, gracefully turning the PCB to reveal its other side, ensuring both faces receive their share of adhesion. 2nd Coating Machine: With a newfound perspective, the second coating machine takes the stage, applying adhesive to the reverse side of the PCB. 2nd Curing Oven: The grand finale! The second curing oven brings our symphony to a breathtaking close, solidifying the adhesive applied in the second act, creating a harmonious, dual-sided masterpiece. Efficiency Meets Dual-Side Coating This SMT conformal coating line is like a well-choreographed ballet that requires at least two dancers. One stands at the front, carefully loading PCBs onto the stage, guiding them through the first act. After the flip, the second dancer carries them through the second act, with both sides perfectly coated, ensuring a flawless performance for applications requiring dual-sided adhesion. UV Curing Oven For Illuminating Results For applications that embrace UV-curable adhesives, our line includes UV curing ovens, adding a layer of brilliance to the process and ensuring an efficient solidification of adhesives. Transfer Stations With A Touch Of Magic Within this symphony, the transfer stations wear a touch of magic – the second and fourth stations feature enchanting blue glass covers illuminated by embedded LED lights. These stations offer operators a clear view of the adhesive quality, allowing for meticulous inspections. The blue glass covers also act as protective shields, guarding freshly coated PCBs from the ever-present dust fairies. Certified Excellence: European Standards And CE Certification Ensuring that our performance meets the highest standards, our entire ensemble adheres to stringent European safety standards and proudly boasts CE certification, a testament to compliance with safety, health, and environmental protection requirements. A Variety Of Coating Machines For Your Unique Needs Our lineup doesn't just feature one star, but an ensemble of coating machines, including models like I.C.T-T550, I.C.T-T550U, I.C.T-T600, and I.C.T-T650. For an encore performance with detailed specifications of each model, please refer to our dedicated article. Additionally, for a captivating exploration of the right coating valve for your adhesive, please visit our comprehensive guide. Single-Sided PCB Coating For those who prefer a single board, our dedicated article on single-sided PCB coating is a spotlight on this specialized process. In the dynamic world of electronics manufacturing, our SMT conformal coating line stands as a versatile and reliable performance. With dual-sided coating capabilities, adherence to European safety standards, and CE certification, we offer a comprehensive platform for your coating needs. Join us in this symphony and explore our range of coating machines and accessories to enhance your conformal coating process. It's a performance that promises to leave you in awe!

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Maximizing Efficiency: The High-Speed SMT Line With Laser Depanelizer

Technical Library | 2024-02-02 07:48:31.0

Maximizing Efficiency: The High-Speed SMT Line With Laser Depanelizer In today's rapidly evolving electronics manufacturing landscape, optimizing efficiency, cost-effectiveness, and precision remains paramount. Businesses engaged in producing industrial control boards, computer motherboards, mobile phone motherboards, and mining machine boards face ongoing challenges in streamlining production processes. The integration of expensive equipment strains budgets, making the creation of an efficient, cost-effective high-speed SMT line a daunting task. However, a solution exists that seamlessly combines these elements into a singular, high-performance, and cost-effective SMT line. Let's delve into the specifics. A Comprehensive High-Speed SMT Line Our innovative solution amalgamates two pivotal components: a cutting-edge SMT (Surface Mount Technology) production line and a laser cutting line equipped with a depanelizer. The SMT Production Line The high-speed SMT line comprises several essential components, each fulfilling a unique role in the manufacturing process: 1. PCB Loader: This initial stage involves loading boards onto the production line with utmost care. Our Board Loader prioritizes safety, incorporating various safety light curtains and sensors to promptly halt operations and issue alerts in case of any anomalies. 2. Laser Marking Machine: Every PCB receives a unique two-dimensional code or barcode, facilitating comprehensive traceability. Despite the high-temperature laser process potentially leading to dust accumulation on PCB surfaces, our dedicated PCB Surface Cleaner swiftly addresses this issue. 3. SMT Solder Paste Printer: This stage involves applying solder paste to the boards, a fundamental step in the manufacturing process. 4. SPI (Solder Paste Inspection): Meticulous inspections are conducted at this stage. Boards passing inspection proceed through the NG (No Good) Buffer Conveyor to the module mounters. Conversely, "No Good" results prompt storage of PCBs in the NG Buffer Conveyor, capable of accommodating up to 25 PCBs. Operators can retrieve these NG boards for rework after utilizing our specialized PCB Mis Cleaner to remove solder paste. 5. Module Mounters: These machines excel in attaching small and delicate components, necessitating precision and expertise in the module mounting process. 6. Standard Pick And Place Machines: The selection of these machines is contingent upon your specific BOM (Bill of Materials) list. 7. Pre-Reflow AOI (Automated Optical Inspection): Boards undergo examination for component quality at this stage. Detected issues prompt the Sorting Conveyor to segregate boards for rework. 8. Reflow Oven: Boards undergo reflow soldering, with our Lyra series reflow ovens recommended for their outstanding features, including nitrogen capability, flux recycling, and water cooling function, ensuring impeccable soldering results. 9. Post-Reflow AOI: This stage focuses on examining soldering quality. Detected defects prompt the Sorting Conveyor to segregate boards for further inspection or rework. Any identified defects are efficiently addressed with the BGA rework station, maintaining the highest quality standards. 10. Laser Depanelizer: Boards advance to the laser depanelizer, where precision laser cutting, often employing green light for optimal results, ensures smoke-free, highly accurate separation of boards. 11. PCB Placement Machine: Cut boards are subsequently managed by the PCB Placement Machine, arranging them as required. With this, all high-speed SMT line processes are concluded. Efficiency And Output This production line demonstrates exceptional productivity when manufacturing motherboards with approximately 3000 electronic components, boasting the potential to assemble up to 180 boards within a single hour. Such efficiency not only enhances output but also ensures cost-effectiveness and precision in your manufacturing processes. At I.C.T, we specialize in crafting customized SMT production line solutions tailored to your product and specific requirements. Our equipment complies with European safety standards and holds CE certificates. For inquiries or to explore our exemplary post-sales support, do not hesitate to contact us. The I.C.T team is here to elevate your electronics manufacturing to new heights of efficiency and cost-effectiveness.

I.C.T ( Dongguan ICT Technology Co., Ltd. )

ICT-T550 Revolutionizes SMT PCB Coating in Industry 4.0

Technical Library | 2023-11-22 09:17:49.0

In the dynamic realm of Industry 4.0, I.C.T introduces the I.C.T-T550 SMT PCB coating machine, a pioneering addition designed to meet the evolving needs of modern manufacturing. This advanced equipment is equipped with features that not only boost productivity but also prioritize precise and consistent coating quality. Let's delve into the crucial attributes that establish the I.C.T-T550 as a vital component in your production process. 1. Automated Precision for Coating Consistency The I.C.T-T550 PCB Coating Machine integrates an automated pressure regulation system for both dispensing valve and pressure tank, equipped with precision regulators and digital gauges. This ensures a consistent coating process, optimizing precision. 2. Front-End Accessibility for Operational Efficiency Located at the front end, power supply and air pressure adjustments are easily accessible, streamlining control. This user-friendly design enhances operator workflow efficiency. 3. Durable Material Transport The open-material transport rail undergoes hardening treatment and utilizes a specialized stainless steel chain drive, ensuring both longevity and reliable material transport. 4. Track Width Adjustment for Trouble-Free Operation Track width adjustment is achieved through a synchronous belt drive mechanism, ensuring prolonged and trouble-free operation. 5. CNC Machined Frame for Unparalleled Precision The machine's frame, subjected to CNC machining, features an independent, all-steel gantry frame, ensuring the parallel alignment of tracks and axes. 6. Workshop Environment Enhancement To ensure a cleaner and safer workspace, the equipment features air curtains at the track entrance and exit, preventing fumes from escaping. It also includes a dedicated exhaust outlet, improving overall workshop air quality. 7. Intuitive Programming and Visualization The I.C.T-T550 PCB Coating Machine allows flexible coating path editing through intuitive programming. The equipment employs a teach mode for programming, offering a visual interface for coating path design. 8. User-Friendly Interface with Practical Design Featuring a user-friendly interface with fault alerts and menu displays, the I.C.T-T550 delivers a sleek and practical design. 9. Streamlined Repetition and Data Management Efficiency is paramount, and the I.C.T-T550 offers the ability to mirror, array, and replicate coating paths, simplifying the process, especially with multiple boards. 10. Real-Time Data Monitoring The equipment automatically collects and displays data, including production volume and individual product work times, enabling effective production performance tracking. 11. Smart Adhesive Management The I.C.T-T550 intelligently monitors adhesive levels, providing automatic alerts for replenishment, ensuring uninterrupted coating. In summary, the I.C.T SMT PCB coating machine seamlessly combines precision, automation, and smart features to meet the demands of Industry 4.0. With integration into MES systems, it provides a reliable and efficient solution for elevating PCB coating processes. The I.C.T-T550's adherence to European safety standards and CE certification underscores our commitment to safety and compliance. For further inquiries or information about additional safety standards, please contact us. Whether optimizing coating quality or enhancing factory productivity, the I.C.T-T550 marks a step into the future of intelligent manufacturing. Explore a variety of coating valves or seek guidance by reaching out to us.

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Revolutionize PCB Manufacturing with SMT Dispensing Machines

Technical Library | 2023-12-18 11:33:57.0

Elevate your electronic manufacturing game with the I.C.T-D600 SMT Dispensing Machine! Precision, safety, and efficiency in one powerful solution. ​In the dynamic realm of electronic manufacturing, precision and efficiency are not just preferences but essential requirements. Introducing the I.C.T-D600, an automatic glue dispenser machine engineered to enhance production processes across various applications. From chip encapsulation to PCB assembly, SMT red-glue dispensing, LED lens production, and medical device creation, SMT dispensing machine is a versatile solution tailored to meet the demands of the industry. Essential Attributes Of The I.C.T-D600 Automatic Glue Dispenser Machine 1. Compliance with European Safety Standards: The I.C.T-D600 SMT dispensing machine prioritizes not only efficiency but also safety, boasting compliance with European safety standards and holding a CE certificate. This ensures a secure and reliable manufacturing environment, aligning with global quality benchmarks. 2. International Component Quality: Internationally renowned components form the core of the D600 SMT dispensing machine. From Panasonic servomotors to MINTRON CCD, each element is carefully selected, guaranteeing high performance and durability. This commitment to quality components results in a machine that operates seamlessly, reducing downtime and maintenance costs. 3. Impressive Performance Metrics: The SMT dispensing machinedoesn't just meet expectations; it surpasses them with exceptional performance metrics: Maximum Guide Rail Speed: 400mm/s Fastest Injection Valve Speed: 20 spots/sec Dispensing Accuracy: ±0.02mm Repeated Accuracy: ±0.01mm Machine Characteristics: Core Part – Jet Valve The non-contact jet dispensing method ensures high-speed operation (max jet speed: 20 spots/second), high accuracy with a minimum dispensing volume of 5nl, and flexibility with extremely small dispensing volumes. The thermostatic system for the flow channel and sprayer ensures uniform glue temperature, resulting in low maintenance costs and an extended service life. Enhanced Capacity: Non-contact jet dispensing eliminates the need for Z-axis motion. Integrated temperature control technology reduces manual intervention. Automatic glue compensation minimizes artificial regulation time. Dual-track design reduces waiting time. Automatic visual location identification and compensation. Non-contact height detection with laser reduces height detection time. Flexibility: Capable of handling substrates or backings of various sizes. Optional heating module. Independent control of dual tracks with user-friendly software. Fast switching between different product lines. Universal platform suitable for various processes with different glues

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Choosing the Right Model I.C.T SMT Coating Machine

Technical Library | 2023-12-01 11:08:12.0

Choosing the Right Model I.C.T SMT Coating Machine In the realm of SMT Coating Machine, I.C.T offers an extensive array of advanced models tailored to diverse production needs. The choice of the right machine significantly influences the efficiency and precision of your conformal coating process. This article will provide an in-depth exploration of I.C.T's PCB conformal coating spray machine models, specifically the I.C.T-T550, I.C.T-T550U, I.C.T-T600, and I.C.T-T650, assisting you in making an informed decision aligned with your specific requirements. I.C.T PCB Conformal Coating Spray Machines Overview I.C.T, renowned for its commitment to innovation, quality, and safety, ensures all models hold CE certification. Let's delve into the key distinctions between these models and the essential factors to consider when selecting the ideal machine for your needs. I.C.T-T550: Precision in Simplicity The I.C.T-T550 SMT Coating Machine model features two critical valves: the atomization valve and the precision valve. If you're interested in exploring a variety of coating valves, simply click here for more information. Ideal for applications where fixed valves suffice, the I.C.T-T550, lacking rotation or tilting capabilities, ensures consistent and reliable results for straightforward conformal coating requirements. I.C.T-T550U: Unleash Flexibility For those requiring more versatility, the I.C.T-T550U SMT Coating Machine model is designed to meet your needs. The addition of a rotating U-axis empowers the valves to rotate a full 360 degrees and tilt up to 35 degrees, enabling precise coating in challenging, intricate areas. The I.C.T-T550U's flexibility makes it an excellent choice for a wide range of applications. I.C.T-T600: Doubling Efficiency Closely resembling the I.C.T-T550 SMT Coating Machine, the I.C.T-T600 boasts a unique feature – equipped with two atomization valves. This dual-valve setup enables simultaneous coating of two PCBs, effectively doubling production efficiency. Ideal for applications prioritizing speed and efficiency, the I.C.T-T600 SMT Coating Machine streamlines the coating process. I.C.T-T650: Versatility Redefined In cases requiring different valves for comprehensive coating, the I.C.T-T650 SMT Coating Machine is the solution. This model features two atomization valves and two precision valves, offering exceptional flexibility for diverse conformal coating applications. The I.C.T-T650 SMT Coating Machine ensures precise and reliable results for even the most complex coating needs. Conclusion: PCB Conformal Coating Spray Machines Selecting the right I.C.T PCB conformal coating spray machine is crucial for enhancing the efficiency and effectiveness of your production process. Consider factors such as the size, complexity, and coating requirements of your PCBAs. Rest assured, I.C.T's unwavering commitment to innovation, quality, and safety guarantees the perfect solution to elevate your conformal coating endeavors. If you need further guidance or wish to tap into the expertise of I.C.T professional engineers for designing a customized coating production line, do not hesitate to reach out. We are here to help you achieve optimal results while meeting European safety standards. If uncertain about whether your product requires a PCB dispensing machine or coating machine, feel free to reach out directly or click here to read our comprehensive guide for further insights: Differences Between Coating & Dispensing.

I.C.T ( Dongguan ICT Technology Co., Ltd. )

Moisture Measurements in PCBs and Impact of Design on Desorption Behaviour

Technical Library | 2018-09-21 10:12:53.0

Moisture accumulates during storage and industry practice recommends specific levels of baking to avoid delamination. This paper will discuss the use of capacitance measurements to follow the absorption and desorption behaviour of moisture. The PCB design used in this work, focused on the issue of baking out moisture trapped between copper planes. The PCB was designed with different densities of plated through holes and drilled holes in external copper planes, with capacitance sensors located on the inner layers. For trapped volumes between copper planes, the distance between holes proved to be critical in affecting the desorption rate. For fully saturated PCBs, the desorption time at elevated temperatures was observed to be in the order of hundreds of hours. Finite difference diffusion modelling was carried out for moisture desorption behaviour for plated through holes and drilled holes in copper planes. A meshed copper plane was also modelled evaluating its effectiveness for assisting moisture removal and decreasing bake times. Results also showed, that in certain circumstances, regions of the PCB under copper planes initially increase in moisture during baking.

National Physical Laboratory

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