The selective soldering process has evolved to become a standard production process within the electronics assembly industry, and now accommodates a wide variety of through-hole component formats in numerous applications. Most through-hole components can be easily soldered with the selective soldering process without difficulty, however ...
The number of through hole connections on a circuit assembly are decreasing with the drive toward miniaturization. When these assemblies are manufactured in high volumes the most convenient method is selective soldering. Although selective soldering is very well introduced in automotive and industrial applications it can also be a very efficient method to solder high volume consumer products.
This document describes general guidelines and attention points for PCB design regarding selective soldering. The guidelines can be applied for Select Wave and/or Multi Wave soldering process in both leaded and leadfree alloy. When a PCB is designed according to these guidelines, a stable and solid solder-process can be guaranteed.
In PCB circuit assemblies the trend is moving to more SMD components with finer pitch connections. The majority of the assemblies still have a small amount of through hole (THT) components. Some of them can't withstand high reflow temperatures, while others are there because of their mechanical robustness. ... Additional soldering on a small select nozzle can make ...
AOI Inspection of Occluded Components -- I'm super new to the SMT world. We just got a Koh Young Zenith AOI and I'm running into some issues with occluded parts. We've got a shield that covers some of the components on a few of our PCBAs, and there is supposed to be a way to have the inspection bypass occluded parts, but I can't figure it out. Anybody out there know how to run the Zenith software that can point me in the right direction?
Selecte a Shunt Resistor -- I'm attempting to perform power analysis on my target, which operates at 3.3 volts. The average current while running is around 140mA without the resistor. With a 5V power source, I utilized a 10Ohm resistor as a shunt resistor. The shunt resistor was connected between 5V and the target VCC pin, and the voltage difference between VCC PIN and GND was measured. (The decoupling caps have been taken out.) The oscilloscope, on the other hand, did not provide a suitable power consumption line. Is something wrong with my setup? Is there any advice on selecting a shunt resistor?
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SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies.
IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly.