Technical Library | 2023-01-17 17:12:33.0
Reflowed indium metal has for decades been the standard for solder thermal interface materials (solder TIMs or sTIMs) in most high-performance computing (HPC) TIM1 applications. The IEEE Heterogeneous Integration Thermal roadmap states that new thermal interface materials solutions must provide a path to the successful application of increased total-package die areas up to 100cm2. While GPU architectures are relatively isothermal during usage, CPU hotspots in complex heterogeneously-integrated modules will need to be able to handle heat flux hotspots up to 1000W/cm2 within the next two years. Indium and its alloys are used as reflowed solder thermal interface materials in both CPU and GPU "die to lid/heat spreader" (TIM1) applications. Their high bulk thermal conductivity and proven long-term reliability suit them well for extreme thermomechanical stresses. Voiding is the most important failure mode and has been studied by x-ray. The effects of surface pretreatment, pressure during reflow, solder flux type/fluxless processing, and preform design parameters, such as alloy type, are also examined. The paper includes data on both vacuum and pressure (autoclave) reflow of sTIMs, which is becoming necessary to meet upcoming requirements for ultralow voiding in some instances.
Technical Library | 2012-06-07 21:44:28.0
First published in the 2012 IPC APEX EXPO technical conference proceedings. IPC-175x Intent: To establish a standard data exchange format that will facilitate, improve, and secure data transfer between all members of a supply chain.
Technical Library | 2024-03-19 07:58:40.0
Introduction of Solder Paste Jet Dispensing Machine Step into the future of manufacturing with the Solder Paste Jet Dispensing Machine, meticulously crafted in Japan under the esteemed I.C.T brand. This cutting-edge equipment represents the pinnacle of precision engineering, delivering unrivaled performance and reliability. Let's dive into its exceptional features and applications. Transmission Structure System of Solder Paste Jet Dispensing Machine At the heart of this Solder Paste Jet Dispensing Machine lies a meticulously designed transmission structure system. Powered by X Y linear motor drive control, it achieves unprecedented precision in positioning. With a reciprocating position accuracy of 3σ±5um and a dynamic position accuracy of 3σ±3um across the X, Y, and Z axes, it ensures flawless execution of tasks with minimal deviation. The load-type gantry structure further enhances stability and accuracy, guaranteeing consistent performance even during high-speed operations. Advanced Function Configuration Flexibility and customization are the hallmarks of the Solder Paste Jet Dispensing Machine. It features a customizable platform tailored to meet the specific needs of diverse applications, ensuring optimal performance and efficiency. Additionally, the machine boasts advanced functionalities such as automatic correction of substrate warp height and real-time penetration monitoring. Equipped with dual cameras, it provides precise feedback for adjustments during the filling process, ensuring unmatched precision and quality. Function configuration.jpg Vision Non-stop Experience uninterrupted precision with the Vision Non-stop functionality of this machine. Capable of detecting 100 chips per second, it automatically identifies position and height deviations, enabling real-time compensation for coating actions. Dual compensation for path and glue amount further optimizes efficiency, minimizing waste and maximizing productivity. With its ability to print solder paste dots as small as 110um, it's perfectly suited for high-precision applications in ICs, BGAs, and beyond. Versatility in Configuration Options and Applications Adaptability is key in modern manufacturing, and the Solder Paste Jet Dispensing Machine delivers on all fronts. Offering a range of configuration options, including different valves tailored to various material viscosities and fluidity, it ensures optimal performance across diverse production scenarios. From semiconductor packages to LED back-end Mini-LED production, its versatility knows no bounds, making it an indispensable asset in a wide range of industries. Explore the Future of Manufacturing with I.C.T Join the ranks of industry leaders embracing the future of manufacturing with I.C.T's Solder Paste Jet Dispensing Machine. With its unrivaled precision, speed, and reliability, it's set to revolutionize your production processes and propel your business to new heights of success. Don't just keep up with the competition--surpass it with I.C.T's cutting-edge solutions. Unlock the Potential of Precision Manufacturing Delve deeper into the transformative power of precision manufacturing and discover how the Solder Paste Jet Dispensing Machine can unlock new possibilities for your business. From reducing production costs to improving product quality, the benefits are endless. Partner with I.C.T today and embark on a journey towards manufacturing excellence. Conclusion In conclusion, our Solder Paste Jet Dispensing Machine embodies the fusion of Japanese precision and I.C.T reliability, offering unparalleled efficiency in solder paste dispensing. With its advanced features and customizable options, it caters to the diverse needs of modern manufacturing processes. Experience the pinnacle of dispensing technology with our Solder Paste Jet Dispensing Machine. Overseas Technical Support by I.C.T At I.C.T, our commitment to customer satisfaction extends beyond the initial purchase. We provide comprehensive overseas technical support, including machine installation, debugging, and customer training. Our dedicated team ensures that your production line runs smoothly from the first product off the line to the seamless delivery of the machine. Partner with I.C.T today and elevate your manufacturing precision with our Solder Paste Jet Dispensing Machine. Contact us now to learn more about our solutions and take your production processes to new heights of efficiency and reliability.
Technical Library | 2016-04-21 14:10:55.0
The world of electronics continues to increase functional densities on products. One of the ways to increase density of a product is to utilize more of the 3 dimensional spaces available. Traditional printed circuit boards utilize the x/y plane and many miniaturization techniques apply to the x/y space savings, such as smaller components, finer pitches, and closer component to component distances.This paper will explore the evolution of 3D assembly techniques, starting from flexible circuit technology, cavity assembly, embedded technology, 3 dimensional surface mount assembly, etc.
Technical Library | 2015-04-02 20:12:58.0
The demands on volume delivery and positioning accuracy for solder paste deposits are increasing as the size and complexity of circuits continue to develop in the electronics industry. According to the iNEMI 2013 placement accuracy for these kinds of components will reach 6 sigma placement accuracy in X and Y of 30 um by 2023.This study attempts to understand the dependencies on piezo actuation pulse profile on jetting deposit quality, especially focused on positioning, satellites and shape. The correlation of deposit diameter and positioning deviation as a function of piezo actuation profile shows that positioning error for deposits increase almost monotonically with decreasing droplet volume irrespective of the piezo-actuation profile. The trends for shape and satellite levels are not as clear and demand further study.
Technical Library | 2017-05-04 17:35:01.0
Most of today's printed circuit board base materials are anisotropic and it is not possible to use a simple method to measure thermal conductivity along the different axis, especially when a good accuracy is expected. Few base material suppliers' datasheet show X, Y and Z thermal conductivities. In most cases, a single value is given, moreover determined with a generic methodology, and not necessarily adapted to the reality of glass-reinforced composites with a strong anisotropy.After reminding of the fundamentals in thermal science, this paper gives an overview of the state-of the art in terms of thermal conductivity measurement on PCB base materials, and some typical values. It finally proposes an innovative method called transient fin method, and associated test sample, to perform reliable and consistent in plane thermal conductivity measurement on anisotropic PCB base materials.
Technical Library | 2021-05-06 13:48:05.0
In this paper most commonly occurring Bare PCB defects such as Track Cut, Track short and Pad Damages are detected by Image processing techniques. Reference PCB without having any defects is compared with test PCB having defects to identify the defects and x-y coordinates of the center of the defects along with radii are obtained using Difference of Gaussian method and location of the individual type of defects are marked either by similar color or different colors. Result Analysis includes time taken for the inspection of a single defect, multiple similar defects, and multiple different defects. Time taken is ranging from 1.674 to 1.714 seconds if the individual type of defects are marked by different colors and 0.670 to 0.709 seconds if all the identified defects are marked by the same colors.
Technical Library | 2014-05-22 17:10:37.0
In this paper, the general solution model of Chou has been used to predict the integral enthalpies of mixing of liquid In-Sn-Zn ternary alloys in five selected sections, xIn/xSn = 0.15/0.85, 0.34/0.66, 0.50/0.50, 0.67/0.33 and 0.85/0.15. The other traditional models such as Kohler, Muggianu, Toop and Hillert are also included in calculations. Comparison with literature data was done and showed reasonable agreement with Toop and Hillert asymmetric models.
Technical Library | 2012-08-30 21:24:29.0
This paper provides definitions of the different voiding types encountered in Gull Wing solder joint geometries. It further provides corresponding reliability data that support some level of inclusion voiding in these solder joints and identifies the final criteria being applied for certain IBM Server applications. Such acceptance criteria can be applied using various available x-ray inspection techniques on a production or sample basis. The bulk of supporting data to date has been gathered through RoHS server exempt SnPb eutectic soldering operations but it is expected to provide a reasonable baseline for pending Pb-free solder applications.
Technical Library | 2023-11-20 18:10:20.0
The electronics production is prone to a multitude of possible failures along the production process. Therefore, the manufacturing process of surface-mounted electronics devices (SMD) includes visual quality inspection processes for defect detection. The detection of certain error patterns like solder voids and head in pillow defects require radioscopic inspection. These high-end inspection machines, like the X-ray inspection, rely on static checking routines, programmed manually by the expert user of the machine, to verify the quality. The utilization of the implicit knowledge of domain expert(s), based on soldering guidelines, allows the evaluation of the quality. The distinctive dependence on the individual qualification significantly influences false call rates of the inbuilt computer vision routines. In this contribution, we present a novel framework for the automatic solder joint classification based on Convolutional Neural Networks (CNN), flexibly reclassifying insufficient X-ray inspection results. We utilize existing deep learning network architectures for a region of interest detection on 2D grayscale images. The comparison with product-related meta-data ensures the presence of relevant areas and results in a subsequent classification based on a CNN. Subsequent data augmentation ensures sufficient input features. The results indicate a significant reduction of the false call rate compared to commercial X-ray machines, combined with reduced product-related optimization iterations.
