Electronics Forum | Mon Jun 25 17:17:06 EDT 2007 | razor1
A German college has reported finding swarf particles on minimelf. No one state side is familiar with the term swarf. We have heard of it concerning machining and surfacing but not in the electronics industry. Has anyone heard of swarf particles on
Electronics Forum | Tue Jun 26 20:51:44 EDT 2007 | davef
You're correct. In the metal working industry, it's common to discuss swarf. For instance: Swarf is a mixture of small metal particles, cooling fluids, lubricants, and residuals from grinding media such as abrasive belts or stone wheels. Swarf is ty
Electronics Forum | Sat May 06 16:43:45 EDT 2006 | grantp
Hi, We have had some failures due to particles, but only larger visible particles such and you should not need a real "clean room" but it's important to make sure things are kept clean, and sweep and mop as often as you need to make sure everything
Electronics Forum | Thu May 04 11:07:23 EDT 2006 | JW
Hello, During a recent customer audit, one of their auditors asked if we measured airborne particles in our SMT operation area. Within their operations, they mentioned a concern when placing micro-BGA's. My question is: do some SMT lines use a pseudo
Electronics Forum | Tue May 09 12:39:18 EDT 2006 | JW
To All, Thank you for your replies and opinions, this is helpful! JW
Electronics Forum | Tue May 09 08:22:53 EDT 2006 | davef
Determine the extent of the problem using a witness plate and having it analyzed by an air quality laboratory such as: http://www.state.sd.us/denr/DES/AirQuality/aaconsultants.htm
Electronics Forum | Fri May 05 08:42:08 EDT 2006 | Chunks
This used to ba a hot topic years ago. But surface mount equipment does not need to be in a clean room. Your product may need to be , which would drive toward a "standard". Some people assume that "clean room" mean "high quality". Next time hav
Electronics Forum | Sat May 06 22:03:57 EDT 2006 | mika
There is a ISO Standard 14644-1 Class Limits, but I don't know if if this is applicable in the "so callled" SMT standard production scenaraio and if so, what class would it be? I hope that some other nice guys will correct me, or have i totally lost
Electronics Forum | Fri Nov 19 01:55:44 EST 2004 | Chics
Hi, Is anyone aware of the Mesh sizes(Screen Printing) that are against specific silver particle sizes. Like in case of solder for different types of paste, different mash sizes are recommended. Is anyone aware of any such things in the case of silve
Electronics Forum | Mon Feb 20 20:47:59 EST 2006 | davef
We assume your stencil is clean. So, try: * Reduce stencil separation speed. * Reduce squeegee pressure. If the pressure is not proper, excess number of particles are stuffed into an aperture and inner pressure / friction among particles increase, an
winsouce.jpg)
.gif)
