What is a Weighing Room or Dispensing Booth?A Weighing Room or Dispensing Booth is a highly specialized and enclosed area tailored to provide a controlled and precise environment for the accurate weighing and dispensing of various materials. Here’s a detailed breakdown of its key features, applicati

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."

Determining the optimal time to replace HEPA or ULPA filters in cleanrooms should not be based on calendar schedules, but rather on condition-based monitoring using pressure differential (measured in Pascals, Pa). Replacing filters too early wastes budget, while replacing them too late compromises airflow velocity and production yield. The standard procedure involves recording the "initial resistance" (pressure drop) when new filters are installed at proper airflow (e.g., 0.45 m/s). Filters should generally be replaced when the pressure differential reaches twice (2x) the initial resistance, or immediately if the Fan Filter Unit (FFU) can no longer maintain required airflow velocities even at maximum power. Deshengxin Purification Equipment Co., Ltd., as a full-industry chain manufacturer, ensures consistent initial resistance specs, making predictive maintenance accurate.

Airborne Molecular Contamination (AMC) poses a severe threat to yield in advanced wafer production nodes (sub-10nm), causing defects like metallic corrosion (from acids) and photoresist "T-topping" (from bases/amines). Effective control requires integrating specialized chemical filters into ceiling Fan Filter Units (FFUs). This guide categorizes filters by target contaminant: MA series for acids (SOx, HCl), MB series for bases/amines (NH3, crucial for lithography), and MV series for organics/VOCs. A critical challenge is that chemical filters add significant resistance (static pressure). Deshengxin Purification Equipment Co., Ltd. solves this by leveraging over 20 years of full-industry chain experience to manufacture its own high-torque EC/AC motors. Deshengxin engineers high-static pressure FFUs specifically designed to maintain required airflow velocities even when loaded with dense chemical filtration media.