SunzonTech’s VCTA-S810/S810L On-line automatic optical inspection (AOI) machine use multi way for processing to improve the speed and accuracy of detection.GPU multi-processing technology combine with camera lens can also greatly
Technical Library | 2018-05-09 22:15:29.0
Creep corrosion on printed circuit boards (PCBs) is the corrosion of copper metallization and the spreading of the copper corrosion products across the PCB surfaces to the extent that they may electrically short circuit neighboring features on the PCB. The iNEMI technical subcommittee on creep corrosion has developed a flowers-of-sulfur (FOS) based test that is sufficiently well developed for consideration as an industry standard qualification test for creep corrosion. This paper will address the important question of how relative humidity affects creep corrosion. A creep corrosion tendency that is inversely proportional to relative humidity may allow data center administrators to eliminate creep corrosion simply by controlling the relative humidity in the data center,thus, avoiding the high cost of gas-phase filtration of gaseous contamination. The creep corrosion relative humidity dependence will be studied using a modified version of the iNEMI FOS test chamber. The design modification allows the achievement of relative humidity as low as 15% in the presence of the chlorine-releasing bleach aqueous solution. The paper will report on the dependence of creep corrosion on humidity in the 15 to 80% relative humidity range by testing ENIG (gold on electroless nickel), ImAg (immersion silver) and OSP (organic surface preservative) finished PCBs, soldered with organic acid flux.
Technical Library | 2021-04-08 00:30:49.0
As the electronic industry moves to lead-free assembly and finer-pitch circuits, widely used printed wiring board (PWB) finish, SnPb HASL, has been replaced with lead-free and coplanar PWB finishes such as OSP, ImAg, ENIG, and ImSn. While SnPb HASL offers excellent corrosion protection of the underlying copper due to its thick coating and inherent corrosion resistance, the lead-free board finishes provide reduced corrosion protection to the underlying copper due to their very thin coating. For ImAg, the coating material itself can also corrode in more aggressive environments. This is an issue for products deployed in environments with high levels of sulfur containing pollutants encountered in the current global market. In those corrosive environments, creep corrosion has been observed and led to product failures in very short service life (1-5 years). Creep corrosion failures within one year of product deployment have also been reported. This has prompted an industry-wide effort to understand creep corrosion
Technical Library | 2021-11-03 16:49:59.0
Ultrathin bare die chips were soldered using a novel soldering technology. Using homogeneous flash light generated by high-power xenon flash lamp the dummy components and the bare die NFC chips were successfully soldered to copper tracks on polyimide (PI) and polyethylene terephthalate (PET) flex foils by using industry standard Sn-Ag-Cu lead free alloys. Due to the selectivity of light absorption, a limited temperature increase was observed in the PET substrates while the chip and copper tracks were rapidly heated to a temperatures above the solder melting temperature. This allowed to successfully soldered components onto the delicate polyethylene foil substrates using lead-free alloys with liquidus temperatures above 200 °C. It was shown that by preheating components above the decomposition temperature of solder paste flux with a set of short low intensity pulses the processing window could be significantly extended compared to the process with direct illumination of chips with high intensity flash pulse. Furthermore, it was demonstrated that with localized tuning of pulse intensity components having different heat capacity could be simultaneously soldered using a single flash pulse.
Electrical devices such as motors, generators, and transformers function on the basis of electromagnetic induction. The rotational or linear movement of such electrical rotary equipment is caused by electromagnetic fields, generated by electrical coi
A spring contact is any part that is used to connect, or keep distance between, two separate parts. These parts can be used to transfer current between the power source and the load on a circuit board. There are a wide variety of applications for suc
Item Capability Number of Layers 2 layer Quantity :3Panel Material FR4 PCB Thickness 1.6mm Copper Thickness 1/1 OZ Max Finish size 580X610mm Min. Hole size Min: 0
Quickturn PCB quote please sent E-mail to quotes@huanyupcb.com. ItemCapability Production TypeAlum PCB/Multilayer PCB 1-14L LaminationFR4. CEM-3. Halogen Free PCB ThicknessInner layer: min 0.1mm outer layer: 0.2-3.2mm Copper ThicknessH/
Industry Directory | Manufacturer
Auspi Enterprises Co., Ltd., one of the professional suppliers of printed circuits in China. We found your company info on the web knowing that you're dealing with electronics, which we think you may have demand on pcbs.
The Bondjet BJ931 High Speed Fully Automatic Dual-Head Wedge Bonder meets the latest technology and flexibility demands for automotive and power electronics applications, handling thin and heavy aluminum, copper and gold wire and ribbon on two specia
