Here is a list of what we use here:
- Router, to cut around the suspected area, do NOT cut too close to you
suspect area.
- Wafering diamond circular saw. To refine the cutting, trim the sample to a
size that will fit into your resin mount and get closer to your target area.
- Mounting cups and clips, to hold the sample.
- Ambient temperature mounting resin, to encapsulate the sample.
- Fume hood, needed for other stuff most of the time, but always used to
cure the resin.
- Grinding wheel, we use Buehler Ecomet IV which is commonly used in the
industry, but other suppliers' will do the same thing. Do not overflood
plate, do not grind to fast, do not apply too much pressure. Slow and steady
is better to keep sample integrity.
- Grinding disks, various grit, to grind the sample very close to the target
area. Several suppliers available.
- Polisher, the grinding wheel can be used for this, but we get definitely
better results with the polisher. Final grinding and all polishing is done
on this. (We use a couple of Minimet 1000, by Buehler for this. Other
suppliers available)
- Polishing cloth, Various kind, check with suppliers and relate to actual
requirements.
- Water soluble diamond polishing suspension, various size, polycrystalline
works best, but is more expensive. Suggest using polycrystalline for final
polish only.
- Inverted Metallographic microscope (50x to 500x, depending on application,
maybe 1000x)
- Etching solution, if requires, often is. Usually DI water, ammonia and
peroxide.
- Well documented procedure.
- Proper PPE. (Personal Protection Equipment)
- Good Steady table or bench.
Hope this helps,
Alain Savard, B.Sc.
Chemical Process Analyst
CAE Electronics Ltd.
e-mail: [log in to unmask]
-----Original Message-----
From: Stokes, Kevin [mailto:[log in to unmask]]
Subject: [TN] Cross section and inspection equipment
I find myself in the market for some failure analysis equipment. I need to
purchase cross section equipment and microscope with digital image capture
capability. The equipment will be used to inspect populated boards for the
most part.
Any recommendations???
Kevin Stokes
Senior Reliability Engineer
Marconi Communications Company
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