PDK validation

The engineering objective

Check technology collateral for consistency within the supported design environment.

The work starts from authorised process files, tool versions, reference cells and expected checks. The team should identify the authoritative revision of each input and record any assumptions needed to proceed. This prevents a later result from being interpreted against a different specification or configuration.

What needs technical attention

Access to collateral does not establish foundry approval; ownership and qualification remain with the appropriate parties.

The review centres on units, layer maps, model references and regression differences. Each finding should identify the input revision, observed behaviour and supporting evidence. Distinguish a confirmed defect from a configuration issue, an unsupported case or an open engineering question before deciding how to resolve it.

How the work is reviewed

The practical sequence is: audit collateral; build reference tests; run extraction and physical checks; investigate mismatches. Intermediate reviews allow the client to resolve decisions while changes are still manageable. If an input changes, identify the affected activities and repeat the checks that depend on it.

The expected package comprises validation cases, compatibility findings and issue records. Acceptance criteria should specify what the receiving team needs to reproduce, inspect or integrate these artifacts. Include known limitations and outstanding actions in that package, rather than assuming that delivery of a file implies acceptance.

Make the flow reproducible and failures visible

An EDA or design-enablement flow combines tools, libraries, technology data, scripts and project configuration. Establish the supported versions and the authority for each input. Confirm access rights and permitted use of PDK and IP material before sharing it. Keep confidential collateral within the approved environment; an automation task should not silently change where protected files are stored.

Automation needs explicit success criteria at each stage. Capture exit status and the reports that establish whether the stage achieved its engineering objective. A command finishing without an error message may still leave missing outputs, incomplete analysis or unacceptable violations. Make restart behaviour and dependencies visible so a partial rerun cannot accidentally combine incompatible revisions.

Validate a methodology change on representative cases, including a deliberately failing case where practical. Compare results and runtime with the baseline, then explain differences. Package usage instructions, required configuration, supported platforms and limitations with the scripts. Reference checks help teams recognise a broken environment before a large production run consumes time and compute.

An illustrative review scenario

A wrapper script reports success after a tool writes a warning and omits the expected output database. Add a check for the required artifact and its associated report, retain the tool log and return a failing stage status. Re-run both a known-good case and a controlled failure. This illustrates flow validation rather than endorsing any specific vendor setup.