Temperature Control Implementation in Semiconductor Wafer Fabrication Facilities

Semiconductor manufacturing imposes extremely stringent requirements on temperature control. Taking lithography as an example, temperature fluctuations in the exposure environment must be controlled within ±0.01°C. Any minute temperature drift can cause overlay errors, directly affecting chip yield.

A 12-inch wafer fab faced temperature control system upgrade needs during capacity expansion. The existing solution had slow sensor response and high control loop latency, making it difficult to meet the temperature control precision requirements of advanced process nodes. After comprehensive evaluation, the fab chose NeuronTech high-precision temperature sensing and closed-loop control solution.

The implementation covered three layers: at the sensing layer, over 200 platinum resistance temperature sensors (PT1000) were deployed covering key temperature control points in lithography, etching, and thin film deposition areas; at the control layer, NeuronTech distributed controllers achieved independent closed-loop control for each zone, shortening control cycles to 100ms; at the management layer, a centralized monitoring platform enabled global temperature field visualization and anomaly early warning.

Results were significant: lithography zone temperature fluctuation narrowed from ±0.03°C to ±0.008°C, improving overlay yield by 1.2 percentage points; meanwhile, precise temperature control avoided over-cooling, reducing overall HVAC energy consumption by approximately 15%, saving over 800,000 RMB in electricity costs annually.

This case validates the effectiveness of NeuronTech integrated sensing and control solutions in semiconductor manufacturing scenarios, providing a replicable implementation path for similar wafer fab temperature control upgrades.