Ramp to Volume is the phase of increasing production output from pilot levels to full-volume manufacturing — systematically scaling wafer starts, improving yield, qualifying equipment capacity, and establishing supply chain reliability to meet customer demand at target volume.

Ramp Phases

• Early Ramp: 100-1000 WSPM (wafer starts per month) — focus on yield improvement and process stabilization.
• Mid Ramp: 1000-5000+ WSPM — scale equipment, train operators, establish supply chain.
• Full Volume: Target WSPM achieved — yield at or near mature levels, all metrics stable.
• Yield Ramp: Yield improvement typically follows a learning curve — each doubling of production adds ~5-10% yield.

Why It Matters

• Revenue: Faster ramp = earlier revenue — time-to-volume directly impacts business profitability.
• Capital: Full-volume production requires $10-20B+ capital investment — equipment must be installed, qualified, and ramped.
• Competition: First to volume wins market share — ramp speed is a competitive differentiator.

Ramp to Volume is scaling up the factory — the critical transition from prototype to mass production that determines commercial success.