-
In photolithography, even invisible micro-vibrations can cause pattern blurring and yield loss. This technical guide explains how FFUFAN achieves vibration levels below 0.5 mm/s (RMS). We explore our engineering approach, including dynamically balanced impellers, shock-absorbing motor mounts, and rigid structural designs tailored for ISO Class 1 Lithography zones.
-
Airborne Molecular Contamination (AMC)—categorized as Acids (MA), Bases (MB), Condensables (MC), and Dopants (MD)—poses a critical threat to sub-10nm semiconductor processes. This technical guide details how to combat these contaminants using a Dual-Stage Filtration Strategy. We analyze the shift from traditional glass fiber to Low-Outgassing PTFE media to prevent Boron contamination and explain the role of Ion Exchange chemical filters in protecting sensitive Lithography and Etching zones."
-
While standard FFUs manage general cleanroom air, Equipment Fan Filter Units (EFUs) are the special forces of contamination control. This guide breaks down the engineering differences, focusing on how EFUs achieve zero-outgassing and micro-vibration control for sensitive semiconductor tools
-
Addressing Electrostatic Discharge (ESD) in semiconductor and electronics cleanrooms requires a multi-faceted approach tackling both equipment accumulation and product surface charges. Deshengxin Purification Equipment Co., Ltd. implements a three-tier strategy based on over 20 years of manufacturing experience. Firstly, passive prevention is achieved using Fan Filter Units (FFUs) with conductive housings (stainless steel or anti-static painting) to stop charge buildup on the hardware. Secondly, active neutralization is provided by specialized Ionizing FFUs integrated with ionizer bars, which shower the work area with balanced ions to neutralize charges on sensitive products. Finally, Deshengxin provides complete ESD-safe environments through conductive Clean Benches and modular Clean Booths to ensure comprehensive static control.
-
Semiconductor cleanrooms often require adding airborne molecular contamination (AMC) chemical filters (e.g., MA/MB/MV series) to Fan Filter Units (FFUs), which significantly increases static pressure resistance. Standard FFUs often cannot maintain airflow under this load. Deshengxin Purification Equipment Co., Ltd. addresses this challenge through its 20+ years of full-industry chain experience. Deshengxin engineers specialized High-Static Pressure FFUs. By utilizing self-manufactured high-torque motors and optimized impeller designs, Deshengxin ensures their FFUs possess the necessary power to overcome high resistance from chemical filters while maintaining the stable airflow crucial for wafer fabrication environments.
-
The primary distinction between HEPA (High-Efficiency Particulate Air) and ULPA (Ultra-Low Particulate Air) filters in electronics manufacturing centers on filtration efficiency and target particle size. HEPA filters (H13/H14 grades) typically capture 99.99% of particles at 0.3μm, making them suitable for standard electronics assembly zones. Conversely, ULPA filters (U15-U17 grades) are essential for critical, ultra-clean semiconductor processes like wafer fabrication and lithography. ULPA filters capture significantly smaller particles, down to 0.12μm, with efficiency ratings up to 99.999995%. Deshengxin Purification Equipment Co., Ltd., leveraging over 20 years of full-chain manufacturing experience, produces both filter grades in-house and provides individual scan test reports to verify performance for stringent cleanroom requirements.
