Electrostatic discharge (ESD) testing determines how much discharge a semiconductor device can withstand before it is damaged. Watson Analytical provides human body model (HBM) and charged device model (CDM) classification testing, and because we are a failure analysis laboratory, we can also localize and explain the damage when a device fails.
ESD testing is also referred to as ESD sensitivity testing, ESD classification, and ESD qualification testing.
ESD Test Models
- Human body model (HBM): simulates discharge from a charged person touching the device. HBM classification is defined in ANSI/ESDA/JEDEC JS-001.
- Charged device model (CDM): simulates a charged device discharging when it contacts a conductive surface, the dominant ESD risk in automated handling and assembly. CDM classification is defined in ANSI/ESDA/JEDEC JS-002.
Why Test for ESD Sensitivity
- Establish a device's ESD classification for datasheets and qualification
- Verify ESD protection design on new silicon
- Define the handling controls a device requires in manufacturing
- Compare ESD robustness across suppliers or design revisions
Fixturing for Your Package
ESD testing requires fixturing that matches the device package. We work with each customer to provide a fixturing solution for their device, including custom fixturing for nonstandard or new packages.
ESD and EOS Failure Analysis
When a device fails ESD testing, or fails in the field from electrostatic discharge or electrical overstress (EOS), the next question is where and why. Our in-house fault isolation and physical analysis, including photon emission microscopy, laser-based fault isolation, delayering, and SEM, localize the damaged structure and identify the failure mechanism, so design teams know exactly what to fix.
Related Services
- Photon Emission Microscopy
- Optical Beam Induced Current (OBIC)
- IC Delayering and Deprocessing
- Scanning Electron Microscopy (SEM/EDX)
Frequently Asked Questions
What is the difference between HBM and CDM testing?
HBM simulates discharge from a charged person into the device. CDM simulates the device itself becoming charged and discharging on contact, which is the more common ESD event in automated manufacturing. Most qualification programs require both.
Can you test devices in nonstandard packages?
Yes. We work with each customer to provide fixturing for their package, including custom fixturing where needed.
What happens if a device fails ESD testing?
We can perform failure analysis on the failed device to localize the damage and identify which protection structure or circuit failed, giving your design team a clear path to a fix.
Request ESD Testing
Watson Analytical is an ISO 9001:2015 certified, ITAR-registered failure analysis laboratory in San Diego, California, serving semiconductor, defense, space, biomedical, and litigation customers. Contact us to discuss your devices and request a quote.