Temperature Control Implementation in Semiconductor Wafer Fabrication Facilities

Semiconductor manufacturing demands extremely precise temperature control. For example, in lithography, temperature fluctuations in the exposure environment must stay within ±0.01°C. Even minor temperature drifts can cause overlay errors, directly impacting chip yield.

A 12-inch wafer fab needed to upgrade its temperature control system during capacity expansion. The existing solution suffered from slow sensor response and high control loop latency, making it difficult to meet the precision requirements of advanced process nodes. After a comprehensive evaluation, the fab selected NeuronTech's high-precision temperature sensing and closed-loop control solution.

The implementation spanned three layers: at the sensing layer, over 200 platinum resistance temperature sensors (PT1000) were deployed to monitor key temperature points in lithography, etching, and thin-film deposition; at the control layer, NeuronTech distributed controllers enabled independent closed-loop control per zone, reducing cycle times to 100ms;; at the management layer, a centralized monitoring platform provided global temperature field visualization and early anomaly alerts.

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

This case demonstrates the effectiveness of NeuronTech's integrated sensing and control solutions in semiconductor manufacturing, offering a replicable implementation path for wafer fab temperature control upgrades.