SCR power regulator for lamp

Thu, 18 Jun 2026 04:19:41 +0800

On the fab floor, a 0.1°C drift during the photoresist bake is enough to throw overlay and CD uniformity off. One shift like that, and you’re scrapping hours of lithography work. So we built the SCR power regulator for the lamp to keep the thermal budget nailed down—shift after shift, year after year. What matters, technically. We run a silicon-controlled rectifier control loop with closed-loop lamp feedback. That’s what keeps the output stable when the line voltage swings around. Setpoint stays within ±0.1°C across the bake curve, so your soft bake and hard bake recipes hit repeatable ramp rates. The assembly is built for Class 1–100 cleanrooms, with zero particle generation and outgassing that meets the tight specs. Power factor correction and efficient switching cut energy use, and the lamp head handles rapid thermal cycling without cracking or delaminating. Why this works in wafer processing. Thermal uniformity is what drives CD control and yield. With the SCR regulator holding lamp temperature steady, photoresist profiles stay consistent from lot to lot. That gives you predictable process windows, fewer rework lots, and less scrap. Reliability is engineered for 7×24 operation: zero unplanned downtime, long service intervals, and stable output over 5,000+ hours. In practice, that means higher throughput without having to stack up spare inventory. A few practical notes. The unit needs a dedicated, clean power feed and proper grounding to keep EMI and line transients out of the loop. If you’re integrating into legacy bake tracks, plan a short commissioning run to tune the PID constants for your specific lamp load. Qualification can be done in a day. Just expect a brief ramp on the first wafer lot while the system settles thermally. Once tuned, the process stays repeatable with minimal intervention.

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SCR power regulator for lamp