Air Filters and Chemical Filtration

Low-Boron HEPA Filter

A semiconductor-oriented HEPA panel using ePTFE or specially selected low-boron media and low-outgassing components to reduce airborne ionic contamination near sensitive processes.

Low-Boron Media Selection
Low-Outgassing Components
Semiconductor Cleanroom Use
Mini-Pleat Panel Design

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Product Introduction

The low-boron HEPA filter is designed for cleanroom zones where conventional borosilicate glass media may contribute trace ionic contaminants. A supported ePTFE membrane or qualified low-boron media is formed into a compact mini-pleat pack and bonded into an anodized-aluminium frame. Low-outgassing separators, polyurethane potting and gasket materials are selected to limit avoidable emissions from the assembled filter. The finished panel fits fan filter units, tool enclosures and recirculation modules serving lithography, wafer processing and other contamination-sensitive operations.

Key Features

ePTFE or selected low-boron media reduces reliance on conventional borosilicate microglass in the active filter pack.

Low-outgassing separators and potting compounds support use close to sensitive wafer and optics processes.

An anodized-aluminium frame provides a clean, non-shedding perimeter with stable seal geometry.

Mini-pleat construction supplies a broad active area within the shallow profile used by cleanroom terminals.

Customer Product Concerns

Trace ionic and molecular emissions from filter materials can matter when the process operates at semiconductor contamination limits.

Conventional microglass media introduces an avoidable boron source near wafer processing.A supported ePTFE or selected low-boron pack removes the standard borosilicate media from the active filtration layer.

Adhesives and separators release volatile compounds into recirculated cleanroom air.Low-outgassing component choices reduce emissions from materials surrounding the filter pack.

Particles are released from unfinished frame surfaces during installation.Smooth anodized aluminium and sealed corners provide a cleanable, non-shedding perimeter.

A process-tool enclosure has limited space for a deep final filter.The shallow mini-pleat format fits common FFU and equipment-terminal depths.

Typical Applications

Semiconductor wafer fabricationPhotolithography clean baysFlat-panel display productionHard-disk media manufacturingContamination-sensitive tool mini-environments

Technical Parameters

Typical construction ranges for a low-boron semiconductor HEPA panel are shown below.

Core Material	Supported ePTFE membrane or specially selected low-boron HEPA media
Panel Thickness	66–90 mm overall frame depth
Effective Width	305–610 mm nominal face width
Maximum Length	Up to 1220 mm nominal face length
Steel Facing Thickness	0.4–0.6 mm low-shedding stainless-steel or coated faceguard
Core Density	Approximately 20–35 kg/m³ equivalent membrane-pack density
Thermal Conductivity	Approximately 0.031–0.041 W/(m·K) for the dry low-boron membrane pack
Surface Finish	Natural anodized aluminium with low-outgassing white or stainless protective grid
Joint Type	Polyurethane gel channel, closed-cell gasket or extruded knife-edge seal
Customization	Available based on the intended application and operating environment.

Available Options

H13 or H14 low-boron mediaGel, gasket or knife-edge sealLow-outgassing cleanroom component setOne-sided or two-sided protective grid

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