Electronics Forum | Tue Oct 07 03:55:03 EDT 2014 | puja
How to avoid /reduce warpage in long length PCB &
Electronics Forum | Tue Oct 07 22:15:12 EDT 2014 | padawanlinuxero
How to avoid /reduce warpage in long length PCB & > _1.6MM THICK PCB. You need to put it in a fixture or pallet to run it in the reflow oven, most common material use here is durostone for the pallets that we run in the reflow oven, we use Durosto
Industry News | 2020-06-18 14:14:42.0
MIRTEC is pleased to announce that Out of the Box Manufacturing has purchased an MV-6 OMNI to meet their ongoing commitment to continuous process improvement. The Award-Winning MV-6 OMNI is the perfect 3D Inspection Solution to enable OBMFG to provide their customers with flawless manufacturing quality and consistent on-time deliveries all at a competitive price!
Industry News | 2021-10-11 16:13:11.0
MIRTEC will showcase its cutting-edge INTELLI-PRO AI Based Smart Factory Automation Solution and GENSYS-PIN Automotive Pin Inspection System in booth #461, Hall A2 at the 2021 Productronica exhibition. The world's largest exhibition for the electronic manufacturing industry will take place on Nov. 16-19, 2021, at Messe Munich exhibition hall in Germany.
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Technical Library | 2020-09-23 21:37:25.0
The need to minimise thermal damage to components and laminates, to reduce warpage-induced defects to BGA packages, and to save energy, is driving the electronics industry towards lower process temperatures. For soldering processes the only way that temperatures can be substantially reduced is by using solders with lower melting points. Because of constraints of toxicity, cost and performance, the number of alloys that can be used for electronics assembly is limited and the best prospects appear to be those based around the eutectic in the Bi-Sn system, which has a melting point of about 139°C. Experience so far indicates that such Bi-Sn alloys do not have the mechanical properties and microstructural stability necessary to deliver the reliability required for the mounting of BGA packages. Options for improving mechanical properties with alloying additions that do not also push the process temperature back over 200°C are limited. An alternative approach that maintains a low process temperature is to form a hybrid joint with a conventional solder ball reflowed with a Bi-Sn alloy paste. During reflow there is mixing of the ball and paste alloys but it has been found that to achieve the best reliability a proportion of the ball alloy has to be retained in the joint, particular in the part of the joint that is subjected to maximum shear stress in service, which is usually the area near the component side. The challenge is then to find a reproducible method for controlling the fraction of the joint thickness that remains as the original solder ball alloy. Empirical evidence indicates that for a particular combination of ball and paste alloys and reflow temperature the extent to which the ball alloy is consumed by mixing with the paste alloy is dependent on the volume of paste deposited on the pad. If this promising method of achieving lower process temperatures is to be implemented in mass production without compromising reliability it would be necessary to have a method of ensuring the optimum proportion of ball alloy left in the joint after reflow can be consistently maintained. In this paper the author explains how the volume of low melting point alloy paste that delivers the optimum proportion of retained ball alloy for a particular reflow temperature can be determined by reference to the phase diagrams of the ball and paste alloys. The example presented is based on the equilibrium phase diagram of the binary Bi-Sn system but the method could be applied to any combination of ball and paste alloys for which at least a partial phase diagram is available or could be easily determined.
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SMTnet Express January 31, 2013, Subscribers: 26152, Members: Companies: 9105, Users: 34242 Projection Moiré vs. Shadow Moiré for Warpage Measurement and Failure Analysis of Advanced Packages There are three key industry trends that are driving
SMTnet Express, July 6, 2017, Subscribers: 30,558, Companies: 10,626, Users: 23,470 Effects of Package Warpage on Head-in-Pillow Defect Zhenyu Zhao, Chuan Chen, Yuming Wang, Lei Liu, Guisheng Zou, Jian Cai and Qian Wang - Tsinghua University
Heller Industries Inc. | https://hellerindustries.com/wp-content/uploads/2018/07/sony.pdf
board warpage. HELLER 50-647-062 SONY ARTICLE - 8 OF 10 EDIT 1 - 08/08/2001 After 30 days of processing using 56.0 kg of solder paste, the condenser tubes in the flux collection system show significant flux accumulation. The trays have a capacity of
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