Nanovea Mechanical Testers provide unmatched multi-function Nano and Micro/Macro modules on a single platform. Both the Nano and Micro/Macro modules include scratch tester, hardness tester and wear tester modes providing the widest and most user frie
Technical Library | 2016-10-20 18:13:34.0
Pad cratering failure has emerged due to the transition from traditional SnPb to SnAgCu alloys in soldering of printed circuit assemblies. Pb-free-compatible laminate materials in the printed circuit board tend to fracture under ball grid array pads when subjected to high strain mechanical loads. In this study, two Pb-free-compatible laminates were tested, plus one dicycure non-Pb-free-compatible as control. One set of these samples were as-received and another was subjected to five reflows. It is assumed that mechanical properties of different materials have an influence on the susceptibility of laminates to fracture. However, the pad cratering phenomenon occurs at the layer of resin between the exterior copper and the first glass in the weave. Bulk mechanical properties have not been a good indicator of pad crater susceptibility. In this study, mechanical characterization of hardness and Young’s modulus was carried out in the critical area where pad cratering occurs using nano-indentation at the surface and in a cross-section. The measurements show higher modulus and hardness in the Pb-free compatible laminates than in the dicy-cured laminate. Few changes are seen after reflow – which is known to have an effect -- indicating that these properties do not provide a complete prediction. Measurements of the copper pad showed significant material property changes after reflow.
Industry Directory | Equipment Dealer / Broker / Auctions
Sunpoc mainly supply video measuring machine, profile projector, hardness tester, microscope and other measuring equipments with good quality and competitive price.
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CSM Instruments develops, manufactures and sells instruments to characterize mechanical properties of surfaces. We have been the world leader in this market for more than 30 years.
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China Valve Manufacturer Zhejiang Xinhai Valve Manufacturing Company supplies gate, globe, check, butterfly, plug, ball valves in standards.
GXHB��3000 Digital Brinell Hardness Tester Usage Range The Brinell hardness test that shows the largest indentation among all the hardness tests is able to reflect the comprehensive features of the material, and the test is unaffected by the organ
New Equipment | Test Equipment
The Micro Scratch Tester is widely used to characterize adhesion failure of thin films and coatings, with a typical thickness below 5 µm. The MST is also used in the analysis of organic and inorganic; soft and hard coatings. Applications include thin
New Equipment | Test Equipment
The CSM Instruments Micro-Hardness Tester provides over three decades of normal force range and thus is ideally suited to the mechanical characterization of hard coatings, thick soft coatings and bulk materials. It provides accurate and reproducible
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PCE Instruments is a manufacturer and supplier of precision measuring instruments including flow meters, pH testers, humidity meters, control systems, borescopes, thermometers, and multimeters.
Electrical testing made easy The new Fluke T3 is a voltage and continuity tester that is designed to work long and hard. There are no settings, just probe the circuit and the T3 will show you whether you are looking at AC volts, DC volts, or an op
