ECHO initial attach acoustic localization

Sonix · Engineering measurement and characterization

Purpose: Narrow sampling locations for initial die-attach anomalies before cross-sectioning or other validation.
Technical approach: ECHO scans ultrasound to produce internal acoustic images, with transducers and settings selected for the sample/interface.
Scope of use: Sonix lists packaged, overmolded, flip-chip and stacked-die applications; validate access to the actual attach layer using controls.
Limitations and open questions: These evaluation considerations are compiled by BLNKK from public information. They are not supplier guarantees or a mandatory submission checklist.
Scope and limitations
Air-defect thickness sensitivity differs from spatial resolution and is not a detection guarantee across stacks. An acoustic anomaly alone establishes neither cause nor complete three-dimensional geometry.
What to prepare
BLNKK suggests preparing the die/attach/substrate stack, target depth/region, coupling-medium restrictions, controls, existing images and sampling coordinates.
Confirm with the supplier
Confirm transducer, frequency, target interface/gates and required options. Trial the actual stack and correlate with cross-sections to establish accessible interfaces, detection limits and localization repeatability.
Public evidence: The official page describes transducers, optional imaging features and sample analysis, not detection or cause-identification results for this attach stack.

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