VLSI Mentoring

Manufacturing, Packaging & Test (ATMP) · Interview Questions

Interview process

ATMP loops open with a resume-led hiring-manager round, then technical rounds that weight packaging/test design and yield/production reasoning. Packaging/test and yield carry the most weight (~60% combined).

Back to Manufacturing, Packaging & Test (ATMP)

The rounds, in order

5 rounds
  1. 1

    Hiring manager round

    45–60 min · hiring manager

    Resume-led screen that also samples packaging/test and behavioral signal

    What they ask
    • Walk through your resume, then a product you supported (~70–80%)
    • Your specific role and responsibilities versus the team's
    • A quick packaging or ATE question (~10%)
    • One or two behavioral prompts — ownership, deadlines (~10%)
  2. 2

    Packaging & test design round

    45–60 min · onsite panel≈30% weight

    Package choice and the test program

    What they ask
    • Wire-bond vs flip-chip vs WLCSP and warpage
    • Thermal: TIM and junction temperature
    • Build an ATE test program end to end
    • Burn-in and reliability
  3. 3

    Yield & production round

    45–60 min · onsite panel≈30% weight

    Production reasoning

    What they ask
    • Yield, binning, and DPPM
    • Guardbands and margining
    • Characterization across corners
    • Failure analysis with fab/OSAT
  4. 4

    Resume-based round

    45–60 min · onsite panel≈20% weight

    Deep dive on a yield or test win

    What they ask
    • End-to-end walkthrough of a product you supported
    • A yield or reliability issue you resolved
    • Test-cost reduction you drove
    • Trade-offs and decisions you made
  5. 5

    Behavioral round

    45 min · hiring manager / peer panel≈20% weight

    Manufacturing ownership and collaboration

    What they ask
    • A yield issue you solved
    • Working with fab and OSAT partners
    • A deadline you protected
    • Thoughtful questions for the team

How to prepare

  • Resume stories: rehearse a product you supported end to end and lead with your own role, not the team's.
  • Packaging: compare wire-bond, flip-chip, and WLCSP and their reliability trade-offs.
  • Test: understand an ATE test program end to end and what drives test cost.
  • Yield & thermal: know binning, guardbands, and thermal (TIM, junction temperature).
  • Story: prepare a yield or reliability issue you helped resolve with fab/OSAT.

Practice these sub-domains

Drill leveled questions for each area of the Manufacturing, Packaging & Test (ATMP) loop.

ATMPAssembly0ATMPPackaging0ATMPATE Test0ATMPBurn-in / Reliability0ATMPYield & Binning0ATMPThermal0ATMPCharacterization0