Wouldn't it be nice to see into the future? With Sherlock by DfR Solutions, you can. Sherlock is a new Automated Design Analysis Tool that allows you to predict product failure earlier in the design process, allowing you to design reliability right
The Wax Injection Machine is used to make wax patterns in the investment casting process with middle- temperature wax technology. It features with a multiple improvements of saving energy, high efficiency and good adaptability. Features Advanced
Technical Library | 2018-05-17 11:14:52.0
Intermetallic compound (IMC) growth is being studied in earnest in this past decade because of its significant effect the solder joint reliability. It appears that from numerous investigations conducted, excessive growth of IMC could lead to solder joint failure. Leading to this, many attempts has been made to determine the actual IMC thickness. However, precise and true representation of the growth in the actual 3D phenomenon from 2D cross-section investigations has remained unclear. This paper will focus on the measuring the IMC thickness using 3D surface profilometer (Alicona Focus G4). Lead free solder, Sn3.0Ag0.5Cu (SAC305) was soldered onto copper printed circuit board (Cu PCB). The samples were then subjected to thermal cycle (TC) storage process with temperature range from 0 °C to 100 °C for 200 cycles and up to 1000 cycles were completed.
Technical Library | 2021-07-20 20:02:29.0
During the manufacturing of printed circuit boards (PCBs) for a Flight Project, it was found that a European manufacturer was building its boards to a European standard that had no requirement for copper wrap on the vias. The amount of copper wrap that was measured on coupons from the panel containing the boards of interest was less than the amount specified in IPC-6012 Rev B, Class 3. To help determine the reliability and usability of the boards, three sets of tests and a simulation were run. The test results, along with results of simulation and destructive physical analysis, are presented in this paper. The first experiment involved subjecting coupons from the panels supplied by the European manufacturer to thermal cycling. After 17 000 cycles, the test was stopped with no failures. A second set of accelerated tests involved comparing the thermal fatigue life of test samples made from FR4 and polyimide with varying amounts of copper wrap. Again, the testing did not reveal any failures. The third test involved using interconnect stress test coupons with through-hole vias and blind vias that were subjected to elevated temperatures to accelerate fatigue failures. While there were failures, as expected, the failures were at barrel cracks. In addition to the experiments, this paper also discusses the results of finite-element analysis using simulation software that was used to model plated-through holes under thermal stress using a steady-state analysis, also showing the main failure mode was barrel cracking. The tests show that although copper wrap was sought as a better alternative to butt joints between barrel plating and copper foil layers, manufacturability remains challenging and attempts to meet the requirements often result in features that reduce the reliability of the boards. Experimental and simulation work discussed in this paper indicate that the standard requirements for copper wrap are not contributing to the overall board reliability, although it should be added that a design with a butt joint is going to be a higher risk than a reduced copper wrap design. The study further shows that procurement requirements for wrap plating thickness from Class 3 to Class 2 would pose little risk to reliability (minimum 5 μm/0.197 mil for all via types).Experimental results corroborated by modeling indicate that the stress maxima are internal to the barrels rather than at the wrap location. In fact, the existence of Cu wrap was determined to have no appreciable effect on reliability.
Industry News | 2010-09-16 21:44:04.0
The Balver Zinn Group announces that Cobar Europe BV now distributes Yincae Advanced Materials’ SMT 158 Capillary Underfill and SMT 256 Individual Solder Joint Encapsulations throughout Europe.
Industry News | 2015-03-16 06:51:04.0
Void Formation in Solder Joints – Causes & Cures Webinar Monday 18th May 2.30pm GMT Voiding in solder joints is not new we have experienced cavities in solder joints during the introduction of through hole, surface mount and more recently area array technology. In many cases we never knew we have had voids till the introduction of x-ray inspection.
Industry News | 2021-03-02 14:45:26.0
SHENMAO America, Inc. is pleased to introduce its newJoint Enhanced Solder Paste (JEP) PF606-EP305 and Solder Joint Encapsulation Material (SJEM) Flux SMEF-Z52. The new epoxy-based solder materials for very fine pad size (70 μm) soldering, especially for advanced display packaging and assembly.
New Equipment | Solder Materials
Indium Corporation manufactures high quality solder powders and pastes. Powders are available in hundreds of alloys and a full range of sizes. Solder pastes can be made from these powders using a wide variety of flux vehicles to get the best fit for
New Equipment | Wave Soldering
Maximum flexibility and performance - state of the art full tunnel nitrogen wave soldering system for demanding applications and high production volumes. Based on SEHO's worldwide leading nitrogen technology, the precision machine tooling and the m
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