Documentation for the Production Part Approval Process (PPAP) automotive memory and storage is not a formality. For automotive OEMs and their Tier-1 suppliers, PPAP defines the evidence a memory and storage component supplier must provide before production quantities ship. An incomplete or incorrect PPAP submission delays production approvals, stalls design wins, and in some programs, blocks a component from the approved vendor list entirely. Understanding what PPAP requires – and what a competent memory and storage supplier should deliver at each submission level – protects the design schedule.
This guide covers the PPAP process as it applies specifically to NAND flash, eMMC, UFS, and LPDDR memory and storage components used in automotive applications: the five submission levels and when each applies, the required documentation package for memory and storage products, how AEC-Q100 qualification integrates with PPAP, the most common documentation gaps in memory and storage PPAP submissions, and the questions procurement teams should ask any prospective memory and storage supplier before committing to a BOM.
What PPAP Means for Automotive Memory And Storage Components
The Production Part Approval Process was developed by the Automotive Industry Action Group (AIAG) to give OEMs documented confidence that a supplier’s manufacturing process can consistently produce parts meeting design specifications. The PPAP Manual (4th Edition) defines 18 elements that may be required, submitted at one of five levels depending on the program and customer requirements.
For mechanical parts, the PPAP framework maps cleanly onto physical dimensions, material certifications, and process capability studies. Memory and storage semiconductors introduce a different challenge. The “part” is an integrated circuit with a firmware layer, a controller, and a NAND die stack. The manufacturing process involves wafer fabrication at a foundry, packaging, and firmware programming – processes that cross multiple supplier tiers and may sit partially outside the direct control of the memory and storage vendor. A competent automotive memory and storage supplier accounts for this in their PPAP package.
Samsung, KIOXIA, and Micron all maintain formal PPAP programs for their AEC-Q100 qualified devices. The benchmark documentation standard is the AIAG PPAP 4th Edition manual. Component PPAP packages at these companies include the AEC-Q100 qualification report as the Design Record equivalent, process FMEA covering firmware and controller manufacturing steps, and Part Submission Warrants (PSW) confirming all applicable elements have been completed.
FORESEE engineering, the parent organization behind Lexar Enterprise’s automotive memory and storage portfolio, maintains PPAP documentation for its AEC-Q100 qualified automotive eMMC, UFS, and LPDDR4 products in line with these industry standards.
PPAP Submission Levels 1 Through 5 for Memory and Storage Products
The five PPAP submission levels define how much documentation the supplier must submit versus retain at the manufacturing site. For memory and storage components, the level a customer requires depends on the application criticality, the supplier’s quality history, and whether the part is new to the program or a carry-over component.
| Level | What is Submitted | When It Applies for Memory or Storage |
|---|---|---|
| Level 1 | Part Submission Warrant (PSW) only | Carry-over parts with established quality history; minor product changes; bulk commodity applications |
| Level 2 | PSW plus product samples and limited supporting data | Low-risk memory or storage applications; established supplier programs; customer-specified exceptions |
| Level 3 (Default) | PSW plus product samples and complete supporting data (all applicable elements) | New automotive memory or storage components, new design wins, new suppliers, post-PCN requalification |
| Level 4 | PSW and other requirements, as defined by the customer | Safety-critical applications (ADAS, TCU); programs with customer-specific supplemental documentation requirements |
| Level 5 | PSW with product samples and complete supporting data available for review at the supplier’s manufacturing location | High-volume, safety-critical memory or storage components; programs with zero-defect requirements and OEM-directed supplier audits |
Level 3 is the default for new automotive memory and storage qualifications. A procurement engineer specifying NAND flash for a new ADAS ECU design should expect Level 3 PPAP memory and storage components documentation from any qualified automotive memory and storage vendor – meaning the full package: PSW, CDCQ-anchored Design Record, PFMEA, Control Plan, Cpk data, and production samples. Programs on platforms with Tier-1 supplier IATF 16949 requirements may specify Level 4 to address additional customer-specific documentation needs around functional safety (ISO 26262) or process change notification (PCN) control.
Required PPAP Documentation for Memory and Storage Components
The AIAG PPAP manual defines 18 elements. Not all 18 apply to every part type, and semiconductor memory and storage components map differently than stamped metal or injection-molded plastic. Here is how the most relevant elements translate to an automotive memory and storage PPAP package.
Design Record
For memory and storage semiconductors, the Design Record consists of the product datasheet plus the Certificate of Design, Construction and Qualification (CDCQ). The CDCQ – sometimes referenced as CDC/Q – is specified by AEC-Q100, AEC-Q101, and AEC-Q200 and defines the device construction and qualification test flow. This is the primary document that establishes the part’s identity for PPAP purposes, and it is the pivot that separates a genuine automotive memory and storage PPAP package from a commercial datasheet drop. An automotive memory and storage supplier should be able to provide the current revision datasheet and the CDCQ document tied to the specific device family and revision – and confirm that the two are in sync.
Authorized Engineering Change Documents
Any Product Change Notification (PCN) issued since the current datasheet was released must be included. For memory and storage components, PCNs commonly cover die shrinks, package material changes, and firmware updates. Automotive programs have longer PCN notification lead times than commercial programs and the PPAP package should document all applicable PCNs and their impact on the qualified configuration.
Design FMEA
Many mature memory and storage product families treat the Design FMEA as proprietary and make it available for on-site review rather than submitting it with the package. This is standard practice in the semiconductor industry. A memory and storage supplier should be prepared to describe their DFMEA process and make the document available for qualified customer review at the manufacturing site if the program requires it.
Process Flow Diagram and Process FMEA
The process flow covers wafer fabrication, assembly, test, and firmware programming steps. The Process FMEA identifies potential failure modes at each step and the controls in place to prevent or detect them. For memory and storage components, the controller firmware programming step is often where automotive memory and storage suppliers differentiate. Custom firmware configurations for automotive programs require documented process controls that standard commercial memory and storage suppliers may not maintain.
Control Plan
The Control Plan documents the quality controls at each manufacturing stage. For automotive memory, this includes wafer probe testing, assembly outgoing quality assurance, final test parameters, and firmware verification steps. The Control Plan ties directly to the IATF 16949 quality management system the supplier operates under.
Measurement System Analysis
For semiconductor memory, Measurement System Analysis (MSA/Gage R&R) applies to the test equipment and test programs used for outgoing quality inspection. A supplier should be able to demonstrate that their test methodology is capable of reliably detecting parts that fall outside specification.
Process Capability Studies and Initial Process Studies
AEC-Q100 qualification test data serves as the primary evidence of process capability for memory and storage components. The qualification report covers stress tests including High-Temperature Operating Life (HTOL), Temperature Cycling, Biased Humidity testing, and electrostatic discharge (ESD) characterization. Cpk calculations from outgoing test data for electrical parameters (access time, supply current, interface speed) supplement the qualification data for the process capability section of the PPAP.
Sample Parts
Physical samples from the production lot that will be submitted for PPAP approval. For memory and storage components, samples should come from standard production lots and should be labeled with the date code and lot traceability information that will appear on production shipments.
Part Submission Warrant (PSW)
The PSW is the formal approval document that the memory and storage supplier signs, certifying that all applicable PPAP elements have been completed and that the submitted samples represent the production configuration. The customer countersigns to indicate approval. The PSW is the trigger document that authorizes production shipments of the qualified configuration.
PPAP Element Checklist for Memory and Storage Architects
The table below maps the 18 AIAG PPAP elements to their memory-specific equivalents. Not every element applies at every submission level – but understanding the full set prevents gaps at audit time. Level 3 submissions require all applicable elements; Level 1 requires only the PSW. Elements marked as typically proprietary are retained at the supplier site and made available for on-site review rather than submitted with the package.
| # | AIAG PPAP Element | Memory-Specific Equivalent | Notes for Memory and Storage Components |
|---|---|---|---|
| 1 | Design Record | Current revision datasheet + CDCQ | CDCQ is the pivotal document specified by AEC-Q100/Q101/Q200. Verify the CDCQ revision matches the current production device revision. |
| 2 | Authorized Engineering Change Documents | All Product Change Notifications (PCNs) post-qualification | Automotive programs require PCN lead times. Gaps here are a top rejection cause. |
| 3 | Customer Engineering Approval | OEM / Tier-1 engineering sign-off on the submitted configuration | Required when a customer-specific firmware configuration or package variant is approved outside the standard product offering. |
| 4 | Design FMEA (DFMEA) | Hardware DFMEA + Firmware DFMEA | Typically proprietary – available for on-site review. Most memory and storage supplier DFMEAs cover hardware only; firmware DFMEA is the critical gap for ADAS and TCU programs. |
| 5 | Process Flow Diagrams | Wafer fab → assembly → final test → firmware programming → outgoing QA | Firmware programming is the step most commonly omitted from commercial memory and storage process flows. |
| 6 | Process FMEA (PFMEA) | Manufacturing process FMEA covering wafer, package, test, and firmware steps | Often retained as proprietary. Should cover all steps in the Process Flow; ask specifically whether firmware programming is included. |
| 7 | Control Plan | Quality controls at wafer probe, assembly OQA, final test, and firmware verification | Tied to IATF 16949 QMS. The Control Plan must reflect the current production configuration, not a legacy commercial product revision. |
| 8 | Measurement System Analysis (MSA) | Gage R&R on test equipment and automated test programs (ATE) | Demonstrates that the ATE test program can reliably detect out-of-spec devices. Ask for Cpk values on critical electrical parameters. |
| 9 | Dimensional Results | Package dimensional conformance to JEDEC standard (e.g., 153-ball VFBGA) | For memory and storage packages, dimensional conformance is typically verified against the JEDEC published mechanical outline. Confirm which JEDEC standard revision applies. |
| 10 | Material / Performance Test Results | AEC-Q100 qualification test report (HTOL, TC, HAST, ESD); for multichip packages, AEC-Q104 Board-Level Reliability (BLR) data | This is the primary evidence of device reliability. BLR data is a separate requirement for eMMC and UFS packages – not covered by Q100 alone. |
| 11 | Initial Process Studies (Cpk) | Process capability data for critical electrical parameters at automotive temperature extremes | Commercial memory and storage suppliers often lack Cpk data at -40°C and +105°C. This is a common gap for suppliers transitioning from commercial to automotive programs. |
| 12 | Qualified Laboratory Documentation | Accreditation of test labs performing AEC-Q100 stress tests (HTOL, TC, moisture) | Tests performed at accredited labs (ISO 17025 or equivalent) carry more weight in OEM audit reviews than in-house results alone. |
| 13 | Appearance Approval Report (AAR) | Not applicable for most memory and storage components | AAR applies to appearance-critical parts (color, texture, finish). Memory and storage semiconductors are exempt in most programs. |
| 14 | Sample Parts | Production-representative samples with date code and lot traceability | Must come from standard production lots with the firmware version and device revision that will ship. Engineering samples do not satisfy this element. |
| 15 | Master Sample | Reference production sample retained by supplier | Required at Level 3+. The master sample serves as the reference for future production conformance checks. |
| 16 | Checking Aids | ATE test fixtures, test programs, and socket setups used for production testing | Documentation of test program revision history is relevant here – especially for custom firmware-configured automotive variants. |
| 17 | Customer-Specific Requirements | ISO 26262 safety documentation (Safety Manual, FMEDA, FIT rate) if program-required | ADAS and safety-critical programs typically add ISO 26262 documentation as a Level 4 customer-specific requirement. Confirm with the Tier-1 quality team early. |
| 18 | Part Submission Warrant (PSW) | Signed PSW from supplier; countersigned by customer quality organization | The PSW is not complete without the customer countersignature. A supplier-only signed PSW does not constitute PPAP approval. |
How AEC-Q100 Qualification Integrates with PPAP
AEC-Q100 and PPAP address different aspects of automotive component qualification, and they are not interchangeable. AEC-Q100 is a device-level stress test qualification standard developed by the Automotive Electronics Council. It proves that a specific memory or storage device family can survive automotive environmental conditions through accelerated testing on sample lots. For a detailed breakdown of how AEC-Q100 qualification applies to NAND flash for automotive applications, including grade-level requirements and stress test methodologies, the Lexar Enterprise NAND reference covers the full qualification framework.
PPAP is a manufacturing process qualification framework. It proves that the supplier’s production process can consistently produce parts meeting the qualified design. A device can pass AEC-Q100 qualification tests and still have an incomplete PPAP if the manufacturing process documentation (FMEA, Control Plan, process flow) is not in order.
The qualification report identifies the device grade and the stress tests completed to that grade. This data anchors the PPAP submission and ties the approved configuration to a specific device revision and qualification baseline.
For automotive eMMC and UFS products specifically, there is a second AEC standard that applies: AEC-Q104, which covers multichip modules. Because eMMC and UFS packages combine a NAND die array and a controller die in a single package, the multi-die construction may require AEC-Q104 qualification in addition to AEC-Q100. The Micron automotive eMMC datasheet and the KIOXIA automotive UFS product documentation both reference PPAP support alongside AEC-Q100 qualification and, where applicable, AEC-Q104. For automotive programs sourcing embedded flash, the Lexar Enterprise UFS and eMMC automotive solutions overview covers qualification grades and package options across the full embedded storage portfolio. An automotive memory and storage supplier targeting ADAS, TCU, or IVI applications should be prepared to address both standards in their PPAP documentation.
AEC-Q100 vs PPAP – Quick Reference
AEC-Q100: Device-level stress test qualification. Proves the design survives automotive environments.
PPAP: Manufacturing process qualification. Proves the supplier can consistently produce AEC-Q100 qualified parts at production volume. Result is a signed Part Submission Warrant authorizing production shipments.
Both are required. One does not substitute for the other on automotive programs.
Common PPAP Gaps for Memory and Storage Component Qualification
Several documentation gaps appear repeatedly in memory and storage component PPAP submissions. Procurement and quality teams reviewing supplier PPAP packages should check specifically for these issues.
Outdated CDCQ tied to a superseded device revision. Memory and storage product families undergo die shrinks and controller updates on commercial schedules. A PPAP package referencing a CDCQ for Revision A while the supplier is shipping Revision C represents an undocumented configuration change. Verify that the CDCQ revision matches the current production configuration.
Missing or incomplete PCN documentation. Automotive programs require PCN notification lead times of 90 to 100 days or more. If a supplier has issued PCNs post-qualification without updating the PPAP package, the approved configuration may no longer reflect what is shipping. Request a complete PCN history for the device.
Process FMEA that does not cover firmware programming. Standard FMEA coverage for memory and storage components often stops at electrical test. Automotive programs – especially those with custom firmware configurations for ADAS, data logging, or power-fail protection – require process controls around firmware programming that generic commercial FMEA documentation does not address.
No process capability data for automotive temperature grades. AEC-Q100 qualification tests are conducted on sample lots. Process capability data for outgoing electrical test parameters at automotive temperature extremes (-40°C, +105°C) is a separate deliverable that some memory and storage suppliers do not routinely generate for commercial products.
PSW signed without customer approval of all applicable elements. A PSW pre-signed by the supplier with blank customer signature fields indicates the supplier submitted without formal approval. The PSW is not complete until the customer quality organization countersigns it.
What to Ask a Memory and Storage Supplier About PPAP Support
Procurement managers evaluating memory and storage vendors for automotive programs should ask these questions before design lock. The answers indicate whether a supplier’s quality infrastructure matches automotive supply chain requirements or is built around commercial channel programs.
Which submission levels do you support for automotive memory and storage products? A qualified automotive memory and storage supplier should be able to support Levels 1 through 4 and, for strategic accounts, Level 5 on-site review. Suppliers who have only delivered Level 1 warrant-only submissions are unlikely to have the process documentation infrastructure that Levels 3 and 4 require.
Is your PPAP documentation generated to the AIAG 4th Edition manual? This is the current standard referenced by major OEMs and their Tier-1 suppliers. Earlier editions may be accepted on legacy programs, but new design wins should target 4th edition compliance.
What is your PCN notification period for automotive programs? Standard commercial PCN lead times (30-90 days) are not compatible with automotive supply chains. Automotive program suppliers should offer PCN notification windows with a process for program-by-program waiver management.
Can you provide AEC-Q104 documentation for eMMC and UFS packages? If the answer is no, ask whether the supplier’s AEC-Q100 qualification was conducted at the module level under AEC-Q104 methodology, which some suppliers execute without formally issuing a separate Q104 report.
Is your Process FMEA available for on-site review, and does it cover firmware programming? Proprietary FMEA documentation is standard in the semiconductor industry. What matters is that the FMEA exists, covers the full manufacturing flow including firmware steps, and is available for authorized customer review at the manufacturing site.
What is your lead time from PPAP request to PSW delivery? First-time PPAP submissions for new products typically take 4-12 weeks for memory and storage components. Suppliers who quote shorter timelines without a completed qualification baseline may be generating documentation retroactively rather than from an established quality program.
Lexar Enterprise PPAP Support for Automotive Memory and Storage Programs
Lexar Enterprise automotive memory and storage products are developed and qualified under the FORESEE engineering quality program, which maintains PPAP documentation for AEC-Q100 qualified devices targeting automotive applications. The automotive portfolio includes AEC-Q100 Grade 2 (-40°C to +105°C) qualified automotive eMMC, UFS 2.2, automotive LPDDR4, and SLC NAND flash products validated across 100+ main control models on 20+ mainstream automotive platforms.
For procurement teams evaluating Lexar Enterprise for an automotive memory and storage design win, the PPAP support process starts with a request through the Lexar Enterprise technical sales team. The submission level required is confirmed against program requirements, and the applicable elements – including the AEC-Q100 qualification report, CDCQ, Control Plan, process documentation, and PSW – are prepared to the AIAG 4th Edition standard.
Long-term supply commitment is a distinct part of the automotive qualification value proposition. PPAP documentation is only as durable as the product lifecycle commitment behind it. A device that reaches end-of-life mid-production forces an unplanned PPAP requalification on a successor component – one of the most disruptive supply chain events an automotive program can face. Lexar Enterprise automotive products carry long product lifecycle commitments aligned with automotive OEM platform schedules, documented in the supply agreement at design win. For programs requiring solid-state drive storage in addition to embedded memory, the Lexar Enterprise automotive SSD storage portfolio carries the same lifecycle and qualification commitments as the embedded memory and storage product lines.
Working Through Automotive Memory and Storage PPAP
Automotive memory and storage qualification is a process that runs on documentation and schedule. AEC-Q100 establishes the device-level reliability baseline. PPAP translates that baseline into the manufacturing process evidence an OEM quality organization needs before production quantities ship. Getting the PPAP package right the first time – with a complete Design Record tied to the current device revision, a Process FMEA that covers firmware steps, and a Control Plan backed by an IATF 16949 quality system – avoids the resubmission cycles that push program schedules.
Memory and storage suppliers who treat PPAP as a checkbox generate incomplete packages. Suppliers with active automotive programs generate PPAP documentation as a routine output of the product qualification process, with the PCN notification infrastructure and long-term supply commitments that automotive program teams require.
For engineering and procurement teams evaluating automotive memory and storage for a current design cycle, the Lexar Enterprise technical team provides PPAP documentation support and direct access to the qualification records behind the automotive product portfolio. Contact Lexar Enterprise to initiate the evaluation process or request documentation for an active program. To find a qualified regional distributor for Lexar Enterprise automotive memory and storage products, visit the distributor locator page.
