Industry News | 2018-11-14 15:25:28.0
Over the years, humidity, moisture or extreme temperature fluctuations can adversely affect electronic assemblies. To ensure that PCB assemblies work faultlessly for a long time, certain areas can be given conformal coatings during production. At the electronica trade show in Munich from November 13-16, Viscom AG offers a comprehensive look at how easily the inspection of these coatings works with the S3088 CCI system.
Industry News | 2021-09-16 06:21:06.0
STI Electronics, Inc. announced that President/CEO David Raby received the Founder's Award from the Surface Mount Technology Association (SMTA).
Industry News | 2022-10-28 14:05:32.0
Koh Young Technology proudly announces a new partnership with Lean Stream for technical sales representation across the northern regions of California and Nevada. Established in 2003, Lean Stream is a value-added manufacturer's representative and distributor based in Silicon Valley that provides world-class leadership in electronics assembly solutions to enable a Smart Factory. Effective immediately, Lean Stream adds Koh Young to its focused portfolio including other industry-leading suppliers like Fuji, Heller, Flexlink, and Vayo.
Technical Library | 2017-11-03 13:39:06.0
If someone were to ask what the most important part of their favorite electronic device is, they are likely to point to the printed circuit board (PCB) responsible for making the device work before moving on to other components. From large motherboards to tiny chips, most of the technology that retail consumers take for granted comes down to a properly installed and calibrated PCB.
Technical Library | 2019-09-24 15:41:53.0
This paper focuses on three different coating material groups which were formulated to operate under high thermal stress and are applied at printed circuit board manufacturing level. While used for principally different applications, these coatings have in common that they can be key to a successful thermal management concept especially in e-mobility and lighting applications. The coatings consist of: Specialty (green transparent) liquid photoimageable solder masks (LPiSM) compatible with long-term thermal storage/stress in excess of 150°C. Combined with the appropriate high-temperature base material, and along with a suitable copper pre-treatment, these solder resists are capable of fulfilling higher thermal demands. In this context, long-term storage tests as well as temperature cycling tests were conducted. Moreover, the effect of various Cu pre-treatment methods on the adhesion of the solder masks was examined following 150, 175 and 200°C ageing processes. For this purpose, test panels were conditioned for 2000 hours at the respective temperatures and were submitted to a cross-cut test every 500 h. Within this test set-up, it was found that a multi-level chemical pre-treatment gives significantly better adhesion results, in particular at 175°C and 200°C, compared with a pre-treatment by brush or pumice brush. Also, breakdown voltage as well as tracking resistance were investigated. For an application in LED technology, the light reflectivity and white colour stability of the printed circuit board are of major importance, especially when high-power LEDs are used which can generate larger amounts of heat. For this reason, a very high coverage power and an intense white colour with high reflectivity values are essential for white solder masks. These "ultra-white" and largely non-yellowing LPiSM need to be able to withstand specific thermal loads, especially in combination with high-power LED lighting applications. The topic of thermal performance of coatings for electronics will also be discussed in view of printed heatsink paste (HSP) and thermal interface paste (TIP) coatings which are used for a growing number of applications. They are processed at the printed circuit board manufacturing level for thermal-coupling and heat-spreading purposes in various thermal management-sensitive fields, especially in the automotive and LED lighting industries. Besides giving an overview of the principle functionality, it will be discussed what makes these ceramic-filled epoxy- or silicone-based materials special compared to using "thermal greases" and "thermal pads" for heat dissipation purposes.
Industry News | 2015-04-20 09:54:25.0
Great Lakes Engineering announced today that it now distributes a revolutionary solder paste. In what is a true market breakthrough, Henkel has developed the first-ever temperature-stable solder paste: LOCTITE GC 10. GC 10 is stable at 26.5°C for one year and at temperatures of up to 40°C for one month, providing benefits throughout the logistics and operations chain, while still offering unbeatable printability and reflow performance.
Electronics Forum | Wed Mar 14 11:24:32 EDT 2007 | Scotceltic
Have you thought about switching to either automatic paste dispensers or rhemoetric pumpheads in order to contain the paste and only dispense what is needed during your shift ? I am not sure what type of printers you have, but I know both of these o
Electronics Forum | Wed Mar 14 07:30:14 EDT 2007 | davef
So, you toss whatever is on the stencil every 8 hours. Correct? How long has it been on the stencil? * If that particular paste has been on the stencil for 8 hours, we'd agree to toss it too. * If paste has been on the stencil for less than 8 hour
Electronics Forum | Sat Nov 17 12:58:12 EST 2007 | mika
I agree with previous postings regarding print speed: Solder paste type/versus fine pitch. Question: Is this a double sided pcb with fairly easy component packages on both sides? In such case, consider make the panel like this: Every second pcb in
Electronics Forum | Mon Nov 05 16:54:00 EST 2007 | bbarton
There are several things that can be done to increase throughput on you screen printer, including the panelization of your bords as Steve & Hussman has pointed out. However that's of limited use if you have plenty of stock that is not panelized. That
