Shuttle Mask is a shared photomask used in MPW (Multi-Project Wafer) services — a single mask set containing designs from multiple customers arranged in a tile pattern, enabling cost-effective fabrication of small quantities of diverse chip designs.

Shuttle Mask Details

• Layout: Multiple designs are tiled within the reticle field — arranged to maximize utilization of the available area.
• Scheduling: Shuttle runs are scheduled periodically (monthly, quarterly) — customers submit designs by the deadline.
• Standard Process: All designs use the same process flow and design rules — no customization per design.
• Providers: Offered by foundries (TSMC, GlobalFoundries, Samsung) and brokers (MUSE, Europractice, MOSIS).

Why It Matters

• Democratization: Shuttle masks make advanced fabrication accessible to small teams — $5K-$50K per design instead of $1M+.
• Education: Universities use shuttle services for research and teaching — training the next generation of chip designers.
• Startup Ecosystem: Enables fabless semiconductor startups to validate designs before committing to full mask sets.

Shuttle Mask is the shared express lane to silicon — combining many designs on one mask for affordable, small-quantity chip fabrication.