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QRA
Guest	Posted: Tue Dec 27, 2025 12:22 pm    Post subject: Cleaning procedure   Let informed me for cleaning procedure of contamination on lead (QFN package) after Pressure cooker test. Lead contam was impact to electrical test contact , some cleaning procedure will make ESD,
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FAEng
Guest	Posted: Tue Dec 27, 2025 2:14 pm    Post subject:   What's the contam? Try rinsing it off with acetone followed by D/I water. If not removed, try ultrasonic cleaning with acetone, then rinse with D/I water. Sometimes mechanical scrubbing is acceptable, but not if device is esd-sensitive. FAEng
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Guest
	Posted: Wed Dec 28, 2025 10:51 am    Post subject:   used citric acid or try sandblasting
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