Views: 0 Author: Site Editor Publish Time: 2026-07-29 Origin: Site
High-precision temperature-controlled semiconductor chillers (Process Chiller / Recirculating Chiller) are used for wafer fabrication, advanced packaging, and chip testing. It’s not just about cooling – the key is keeping the temperature extremely stable even under dynamic loads, while maintaining ultra-clean conditions, low vibration, and minimal electromagnetic interference. Ordinary industrial chillers usually have a temperature accuracy of ±1~±2℃; semiconductor production lines generally require temperature stability of ±0.01 ~ ±0.1℃. Even tiny fluctuations can cause uneven films, etching shifts, or photolithography misalignment, which in turn affects yield.
Essential core hardware design (semiconductor-specific configuration):
1) Refrigeration loop system
- Full inverter scroll compressor (Inverter Scroll) with 15%~100% continuous capacity adjustment, replacing traditional on/off compressors; eliminates temperature shocks.
- High-precision electronic expansion valve (EXV) with feedforward predictive PID control. Ordinary TXVs can’t handle the dynamically changing thermal load in semiconductors; EXVs adjust refrigerant flow in milliseconds.
- Low GWP eco-friendly refrigerants: R513A / R454C / CO₂ transcritical solutions, meeting overseas SEMI standards and environmental regulations.
- Main-secondary dual-loop architecture (mainstream high-end solution)
* Primary loop: refrigeration coolant
* Secondary process loop: directly supplies to the equipment
Buffers thermal disturbances, isolates compressor fluctuations, and achieves extreme temperature control.
2) Heat exchange and fluid loops (cleanliness is top priority)
- Pipeline materials: 316L stainless steel / titanium heat exchangers; copper and brass are forbidden to prevent metal ion contamination in wafer processes.
- Fully closed loop circulation prevents air ingress and microbial growth.
- Built-in multi-stage precision filters (5μm/1μm optional).
- Variable-frequency magnetic pumps / canned pumps: no shaft seal leakage risk, low vibration; ordinary mechanical seal pumps are strictly prohibited.
- Optional media: DI deionized water, glycol solutions, inert fluorinated fluids (Fluorinert/Galden).
3) Sensing and Control System (Source of Accuracy)
4-wire PT1000 high-precision temperature sensor, resolution 0.001℃;
Adaptive PID load feedforward algorithm, compensates for instant heat fluctuations of the machine;
Independent monitoring: temperature, flow, pressure, resistivity (for DI water models);
Standard communication protocols: Modbus TCP, BACnet IP, OPC UA, integrates with Fab plant central BMS;
Data logging, fault warning, remote diagnostics.
4) Cleanroom-Compatible Structure
Ultra-low vibration design: compressor fully shock-mounted, soundproof enclosure; avoids vibration interference with optical equipment (like lithography machines);
Electrical EMC optimized, won’t interfere with RF plasma chambers;
Whole unit meets SEMI S2 / SEMI F47 semiconductor equipment safety standards (mandatory for wafer exports);
Air-cooled models available in high-temperature version, suitable for cleanroom outdoor units up to 45~50℃; water-cooled models offer better long-term energy efficiency.
① Air-cooled Semiconductor Precision Chiller (Air-cooled)
✅ Pros: No need for a cooling tower, flexible deployment for small fabs, R&D labs, and retrofit projects
❌ Cons: Higher condensing pressure in high-temperature environments, lower efficiency compared to water-cooled units for the same cooling capacity
Suitable for: Single-process equipment, small to medium packaging and testing workshops, scenarios without cooling water
② Water-cooled Semiconductor Precision Chiller (Water-cooled)
✅ Pros: More stable operation, higher energy efficiency (COP), lower noise in equipment rooms, smaller temperature fluctuations
❌ Cons: Requires the factory's cooling water tower and piping network
Suitable for: Large wafer fabs, centralized deployment of multiple production lines, 24/7 continuous mass production lines
