The Standards Landscape: How DPA is Governed in High-Reliability Semiconductor Programs
Why Destructive Access is Justified and the Uncertainties it Resolves
Trade-Offs and Risk of Irreversibility
DPA Represents Controlled Escalation for Deeper Insights
References and Further Reading
In semiconductor failure analysis (FA), investigations typically begin with techniques that preserve the integrity of the sample while allowing analysts to develop initial hypotheses. However, when non-destructive methods cannot resolve structural uncertainty or verify internal construction, destructive physical analysis (DPA) may be required.
Image Credit: asharkyu/Shutterstock.com
Non-destructive approaches provide valuable information but do not always resolve the underlying problem. Internal interfaces may remain inaccessible, and competing failure hypotheses may not be distinguishable through indirect observation.
When this analytical uncertainty remains, destructive access may be necessary to obtain definitive structural evidence.
DPA is defined as a systematic, logical examination of parts during staged physical disassembly to identify design, workmanship, or processing defects not observable during normal screening.1 It is not the first step in failure analysis, but when performed, it defines the final one.
Save this PDF for later by downloading it here.
The Standards Landscape: How DPA is Governed in High-Reliability Semiconductor Programs
In high-reliability semiconductor programs, destructive physical analysis is performed within a defined standards framework that governs how components are evaluated and how the results influence production decisions.
This framework separates three related areas:
- Performance specifications
- Test method standards
- DPA governance standards
Performance specifications such as MIL-PRF-19500 and MIL-PRF-38535 define the overall requirements for semiconductor devices, including screening procedures, qualification requirements, quality management expectations, and conformance criteria.3-4
Test method standards such as MIL-STD-750 and MIL-STD-883 describe how specific inspections and measurements are performed. These include procedures for radiography, bond pull testing, die shear testing, seal testing, and SEM preparation.5,6
DPA governance standards, including MIL-STD-1580, define the rules for performing destructive physical analysis itself. They establish sampling plans, acceptance and rejection criteria, prohibited materials analysis, and documentation requirements that determine how DPA findings affect production lot disposition.1
The development of these standards is closely tied to the early evolution of the semiconductor industry. In its early decades, US military procurement represented a major market for advanced and high-cost semiconductor components, often adopting new technologies before they became economically viable for commercial use. The reliability demands of military and NASA aerospace programs helped shape the rigorous semiconductor quality and reliability standards that continue to govern high-reliability electronics today.2
Within this framework, destructive physical analysis is performed according to defined sampling plans, inspection methods, and acceptance criteria. These standards determine how DPA is conducted and how the resulting findings influence production lot disposition.
Why Destructive Access is Justified and the Uncertainties it Resolves
In short, destructive access is justified when non-destructive evaluation alone cannot resolve structural ambiguity or when formal verification of internal construction is required.
As such, DPA is reserved for defined samples from production lots; it represents a deliberate and controlled step within high-reliability semiconductor programs. Its purpose is to answer specific, unresolved questions concerning device configuration, build quality, material integrity, or failure mechanism.1
1. Visual Construction Verification
When uncertainty exists regarding internal configuration, bond geometry, or material interfaces, destructive access provides direct confirmation.
Decapsulation - whether chemical, laser, or mechanical - exposes the die and interconnect structures for internal visual inspection in accordance with established methods. Once exposed, the die surface, bond pads, and observable markings are documented using optical microscopy and scanning electron microscopy (SEM).7
SEM metallization inspection is particularly valuable for evaluating interconnect quality on non-planar oxide dice. It enables the identification of process-related metallization defects that may be batch-oriented and not detectable through non-destructive methods.7
Where inspection must extend beyond surface-level features, delayering - often assisted by focused ion beam (FIB) techniques - provides deeper structural insight. By progressively removing fabrication layers in a controlled, top-down sequence, individual process levels can be examined to assess metallization continuity, dielectric integrity, and via formation or integrity. This approach is applied when defects are suspected within the interconnect stack and cannot be resolved through surface inspection or radiographic imaging.8
Cross-sectioning further permits direct examination of internal materials and structural interfaces. Components such as diodes, capacitors, and plastic-encapsulated microcircuits (PEMs) are commonly sectioned to identify cracks, voids, delamination, or structural inconsistencies that cannot be confirmed non-destructively.7
Observations obtained during internal visual inspection, SEM evaluation, and cross-sectioning are validated against baseline configuration documentation and applicable acceptance criteria defined in the governing specifications.
Deviations from approved design, materials, or workmanship requirements are documented as defects in accordance with the relevant standard.1
2. Attachment and Interconnect Integrity
Beyond verifying device construction, destructive physical analysis also evaluates the integrity of attachment interfaces.
Structural uncertainty often occurs at these interfaces, where mechanical and electrical connections must maintain long-term reliability. In semiconductor packages, wire bonds provide the electrical connection between the silicon die and the external package leads, typically using gold, aluminum, or copper wire.
The mechanical integrity of these bonds is evaluated through wire pull testing, which measures the bond strength distribution and verifies compliance with specified strength requirements.7
Wire bond shear testing evaluates the strength and integrity of the metallurgical bond between a ball bond and the die or package bonding surface. These methods determine whether bond formation, intermetallic growth, or interface adhesion meets defined acceptance criteria.7
Similarly, die shear testing evaluates the integrity of materials and processes used to attach the semiconductor die to the package header or substrate. A controlled force is applied to shear the die from its mounting surface, and the measured force and fracture characteristics are assessed against specified limits defined in applicable standards.7
In each of these cases, DPA converts probabilistic inference into direct structural observation. Rather than relying solely on electrical signatures or indirect imaging, it resolves uncertainty through controlled exposure and measurement of the physical interfaces themselves.
Trade-Offs and Risk of Irreversibility
DPA delivers definitive structural evidence, but it does so at measurable cost. The decision to proceed must balance information gain against material loss, time, and process risk.
Sample Loss and Statistical Assumption
DPA is fundamentally a sampling-based approach. Its validity relies on the assumption that the tested sample is representative of the entire production lot. When process control is weak, larger sample sizes are required to achieve statistical confidence, increasing both material consumption and cost.
Moreover, because DPA methods destroy test specimens, the lot's effective yield is immediately reduced by the sample size.9
Cost, Duration, and Manufacturing Exposure
DPA also introduces operational overhead. The labor, capital equipment, and analytical expertise required to perform cross-sectioning, metallization inspection, bond testing, and documentation represent a non-trivial investment.
In some cases, qualification or end-of-line testing may be time-consuming to complete. When defects are identified after lengthy evaluation cycles, the delay between manufacture and discovery can result in additional lots being produced under the same flawed process conditions. These downstream batches may require quarantine or re-evaluation, compounding cost and schedule impact.9
Artefact Introduction and Evidence Risk
Destructive access itself carries technical risk.
For example, acids used for chemical decapsulation can be absorbed into residual encapsulant or bond wire pits. If not properly neutralized or removed, these residues may leach out post-decapsulation and degrade wire integrity. Mitigation strategies include solvent rinsing, neutralization, controlled drying, and performing bond pull or ball shear testing shortly after decapsulation.1
DPA Represents Controlled Escalation for Deeper Insights
Destructive physical analysis is not destruction for its own sake; it is controlled structural interrogation performed when non-destructive methods reach their limits or when standards mandate direct verification.
Within high-reliability semiconductor programs, DPA transforms unresolved ambiguity into defensible physical evidence. When executed under defined sampling plans and rigorous documentation requirements, it provides the structural certainty necessary to support qualification decisions, lot disposition, and long-term reliability assurance.
References and Further Reading
- Department of Defense. (2025). Test Method Standard: Destructive Physical Analysis for Electronic, Electromagnetic, and Electromechanical Parts. Available at: https://landandmaritimeapps.dla.mil/Downloads/MilSpec/Docs/MIL-STD-1580/std1580.pdf
- Pecht, M.G. (1996). Issues Affecting Early Affordable Access to Leading Electronics Technologies by the US Military and Government. Circuit World. DOI:10.1108/03056129610799967, https://www.emerald.com/insight/content/doi/10.1108/03056129610799967/full/html.
- NASA. (2021). Performance Specification: Semiconductor Devices, General Specification For. Available at: https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=13381
- NASA. (2022). Performance Specification: Integrated Circuits (Microcircuits) Manufacturing, General Specification For. Available at: https://landandmaritimeapps.dla.mil/Downloads/MilSpec/Docs/MIL-PRF-38535/prf38535.pdf
- Department Of Defense. (2021). Test Method Standard: Test Methods For Semiconductor Devices. Available at: https://landandmaritimeapps.dla.mil/Downloads/MilSpec/Docs/MIL-STD-750/std750.pdf
- Department Of Defense. (2025). Test Method Standard: Microcircuits. Available at: https://landandmaritimeapps.dla.mil/Downloads/MilSpec/Docs/MIL-STD-883/std883.pdf
- Lilani, S., et al. (2025). Destructive Physical Analysis (DPA) of Electronic Components: A Primer On MIL-STD-1580 “DPA for EEE Parts”. NASA. Available at: https://nepp.nasa.gov/docs/tasks/075-EEE-Parts-Assurance/2025-Ochs-CMSE-Presentation-20250004167.pdf
- Nowakowski, P., et al. (2022). Millimeter-scale, Large Uniform Area Semiconductor Device Delayering for Physical Failure Analyses and Quality Control. Microscopy and Microanalysis. DOI:10.1017/S1431927622011825, https://www.cambridge.org/core/journals/microscopy-and-microanalysis/article/10.1017/S1431927622011825.
- Sciemetric. (2010). How to Eliminate Destructive Testing. Medical Manufacturing Whitepaper Series. Available at: https://www.sciemetric.com/sites/default/files/2018-05/SI_Eliminate-Destructive-Test_WP3.pdf
Disclaimer: The views expressed here are those of the author expressed in their private capacity and do not necessarily represent the views of AZoM.com Limited T/A AZoNetwork the owner and operator of this website. This disclaimer forms part of the Terms and conditions of use of this website.