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 | 2013-11-13 14:13:45.0
Metcal today announced that it was awarded a 2013 Global Technology Award in the category of Rework and Repair for its Metcal Scorpion Rework System with Side View Camera and IR Sensor.
Used SMT Equipment | In-Circuit Testers
Rohde & Schwarz FSH6.26 Handheld Spectrum Analyzer, 100 kHz-6 GHz Rohde & Schwarz, Inc. FSH626 Handheld spectrum analyzer, 100 kHz - 6 GHz, RBW 100 Hz - 1 MHz color LCD display, tracking gen., preamp (P/N 1145.5850.26) FSH606: Bandwidth 100
Used SMT Equipment | In-Circuit Testers
Rohde & Schwarz FSH6.26 Base Frequency: 900 KHz Max Frequency: 6 GHz Handheld Spectrum Analyzer, 100 kHz-6 GHz Rohde & Schwarz, Inc. FSH626 Handheld spectrum analyzer, 100 kHz - 6 GHz, RBW 100 Hz - 1 MHz color LCD display, tracking gen., preamp
Industry News | 2016-03-03 08:45:28.0
Henkel Adhesive Technologies today announced an addition to its line of Bergquist Liqui-Form® Thermal Interface Materials (TIMs) with the market introduction of Liqui-Form 3500. A one-part, thermally conductive, liquid formable gel, Liqui-Form 3500 combines high thermal conductivity with process flexibility and excellent reliability.
Industry News | 2012-06-18 20:06:38.0
OK International announces that the new Metcal Scorpion Rework System has received a significant amount of positive industry attention, including the prestigious 2012 EM Asia Innovation Award in the category of Repair/Rework Equipment.
Industry News | 2012-05-01 19:12:41.0
Nordson DAGE, a division of Nordson Corporation (NASDAQ: NDSN), will exhibit its 4000Plus Bondtester Pad Cratering Inspection System in Booth #212 at the upcoming Electronic Components and Technology Conference
The SX-100 Sodr-X-Tractor is the solder extraction handpiece for high volume operations. It uses PACE's new SX-100 desoldering tips, the longest lasting desoldering tips availible on the market today. The SX-100 features a disposable collection chamb
Industry News | 2011-11-20 13:14:27.0
Nordson DAGE has been awarded a Global Technology Award in the category of Test Equipment for its 4000Plus Bondtester Pad Cratering Inspection System.
Used SMT Equipment | In-Circuit Testers
Agilent-Keysight 89441A-AY8-AYA-AYH-UFG Signal Analyzers Agilent-Keysight 89441A-AY8-AYA-AYH-UFG Model: 89441A-AY8-AYA-AYH-UFG Manufactured by: Agilent-Keysight See all Agilent-Keysight equipment Agilent-Keysight 89441A-AY8-AY
Midwest Circuit Technology provides Carbide Router Bits and End Milling Cuters for use in PCB Depaneling equipment. We have over 35 years of supplying tools and machining experience in drilling, Routing, Test Fixture manufacture.
114 Barrington Town Square
Aurora, OH USA
Phone: 13309956900