Photofabrication Engineering Inc. logo in red color for precision photochemical etching manufacturer.

Tungsten Photochemical Machining for Precision Parts

Reliable, Quality Tungsten Components Through A Precision Precision Chemical Machining Process 

PEI manufactures precision tungsten components using advanced photochemical etching technology. Known for its exceptional density, thermal stability, and resistance to extreme environments, tungsten is widely used in aerospace, semiconductor, medical, and energy systems where reliability is critical.

Traditional fabrication methods often struggle with tungsten’s hardness and brittleness. PEI’s proven etching process enables intricate tungsten parts with tight tolerances, fine features, and minimal material stress, making complex designs achievable without compromising performance.

Why

Tungsten

Tungsten is one of the most capable engineering materials available for demanding applications. Its unique physical properties allow components to perform reliably under extreme temperatures, radiation exposure, and vacuum conditions.

Key material advantages include:

  • Extremely high melting point – Tungsten maintains structural integrity at temperatures exceeding 3,400°C, making it ideal for high-heat environments.
  • Exceptional density and radiation shielding capability – Its density provides effective attenuation of radiation and high-energy particles.
  • High thermal stability – Minimal dimensional change under temperature variation supports precision systems.
  • Electrical conductivity – Suitable for specialized electronic and semiconductor applications.
  • Vacuum compatibility – Low vapor pressure makes tungsten ideal for vacuum and space environments.

These characteristics make tungsten essential for applications where conventional metals cannot perform.

High-precision titanium bipolar plate for fuel cells, manufactured using photochemical etching.

The Challenges of

Tungsten

While tungsten offers unmatched performance benefits and unique properties that set it apart from several other specialty metals, it presents significant manufacturing challenges. As an extremely dense and inherently brittle material, tungsten requires careful handling during fabrication.

High-precision floating titanium bipolar plate for fuel cells, manufactured using photochemical etching.
  • Brittle under mechanical force – Tungsten can crack or fracture during stamping or machining operations.
  • Tool wear during CNC machining – Its hardness accelerates tool degradation, increasing cost and lead time.
  • Heat-affected zones from laser cutting – Thermal processes can alter material properties or introduce microcracks.
  • Cracking and distortion risks – Mechanical stress can compromise dimensional accuracy.
  • High scrap cost – Tungsten’s material value makes manufacturing inefficiencies expensive.

Because of these limitations, engineers often seek alternative manufacturing methods capable of producing precision parts without mechanical or thermal damage.

Why Precision Chemical Machining Is Ideal for Tungsten

Photochemical etching provides a fundamentally different approach to manufacturing tungsten components. Instead of cutting with force or heat, the process removes material chemically, preserving the integrity of the base metal.

Benefits include:

  • No mechanical stress – Eliminates cracking risks associated with brittle materials.
  • No heat-affected zone – Maintains tungsten’s original metallurgical properties.
  • Burr-free edges – Produces clean features suitable for precision assemblies.
  • Tight tolerances – Ideal for high-accuracy components.
  • Fine features and complex geometries – Enables intricate apertures, grids, and shielding designs.
  • Cost-effective production – Particularly advantageous for complex or thin tungsten parts.

Photochemical etching allows engineers to fully leverage tungsten’s performance without the manufacturing limitations imposed by conventional processes.

Our Tungsten Etching Capabilities

We specialize in high-performance tungsten etching, from prototypes to full-scale production runs. Please see our Design Guide or Contact Us for more information about our additional manufacturing capabilities.

Our Proven Etching Process for Tungsten – PEI’s Eco-Chem™ Advantage

Our proprietary Eco-Chem™ photochemical etching process is engineered for precision, safety, and sustainability.

The benefits of our unique process:

Burr-Free & Stress-Free:

Unlike mechanical or laser cutting, our process does not introduce stress or heat distortion.

Eco-Friendly Chemistry:

We use proprietary, RoHS-compliant etchants (including hydrofluoric acid) designed to minimize environmental impact.

Metal Integrity Preserved:

Our proven process means no heat-affected zones or micro-cracks, maintaining the full strength of titanium.

Rapid Turnaround:

We offer short lead times for prototypes and scalable production capacity.

Design Optimization:

Our engineers collaborate closely with you to optimize designs for manufacturability and cost efficiency.

Extensive Safety Precautions:

Our facilities adhere to rigorous handling protocols and employ advanced containment systems to ensure maximum safety during chemical etching operations.

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Key Applications from Chemical Etching Tungsten

Tungsten components are critical across industries where extreme conditions demand exceptional material performance. As one of the most important specialty metals, tungsten offers exceptional hardness, remarkable thermal stability, and high density, making it indispensable in advanced engineering environments.

PEI supports customers with precision tungsten parts engineered for reliability, repeatability, and long-term material integrity across demanding sectors.

Aerospace & Defense

Tungsten’s density and thermal stability make it ideal for high-performance aerospace components operating in extreme conditions. Because tungsten retains its strength at elevated temperatures, it is widely used for radiation shielding, satellite systems, guidance hardware, and RF shielding in mission-critical aerospace and defense applications.

See how we’re supporting the Aerospace and Defense industries.

Semiconductor & Electronics

In semiconductor manufacturing, tungsten supports high-precision processing where dimensional control is critical. It is used in wafer masks, precision apertures, EMI/RFI shielding, and heating elements for vacuum or high-temperature systems. PEI’s photo chemical etching enables intricate geometries while preserving full material integrity in thin-gauge parts.

Learn more about our work in the Electronics industry.

Medical & Imaging

Tungsten plays a vital role in advanced medical applications, particularly where radiation management is required. Its high density makes it ideal for X-ray collimators, shielding inserts, radiation targeting components, and certain implanted medical devices where dimensional accuracy and stability are critical for patient safety and imaging clarity.

Explore how our etching capabilities support the high standards required in Medical applications.

Nuclear & Energy

Energy and nuclear environments require materials capable of withstanding extreme heat and radiation exposure. Tungsten’s resistance to thermal degradation makes it suitable for reactor shielding, thermal protection systems, and high-temperature precision components. In applications where longevity and safety are paramount, tungsten’s physical properties support reliable performance under stress.

See how we’re driving Energy industries.

How PEI Supports Tungsten Applications

Tungsten Parts We Produce

PEI manufactures a wide range of etched tungsten components, including:

  • Radiation shielding plates
  • Tungsten apertures
  • Tungsten collimators
  • Thin precision shims
  • Precision grids
  • Semiconductor masks
  • RF shielding components

Each part is produced with strict process control to ensure dimensional accuracy, repeatable performance, and consistent quality across every order.

PEI’s suite of capabilities

Engineering

We work with our partners to introduce new ideas and enhanced manufacturing solutions. Our engineers leverage the power of technology and decades of experience to ensure each design and plan will deliver the expected results, whether for the latest in renewable energy or a new life-saving medical technology.

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Engineer using CAD software to design precision-machined metal gear component.

Chemical Machining

PEI’s commitment to delivering thin metal parts and components utilizing precision photochemical etching dates back decades. We are the world’s leading etcher of titanium and can handle aluminum, beryllium copper, molybdenum, and many other metals. PCE is an ideal manufacturing process for rapid prototyping and high-production runs.

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Worker wearing gloves holding up a thin precision-etched metal component sheet in a manufacturing facility.

Forming

Our precision operators turn thin metal parts into reliable components with meticulous machine and manual forming techniques. PEI’s forming expertise starts at the first step, enabling us to develop highly accurate parts that our team forms to exact standards and specifications.

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Metal forming process with operator loading sheet metal into a press brake for precision bending.

Finishing

Protecting precision metal parts from corrosion, wear, and environmental hazards is job number one when applying coatings, finishes, plating, or paint. Finishing applications also offer antibiotic and aesthetic benefits to the parts we produce via photochemical etching.

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Gold-plated Kovar contact strip with multiple precision-etched electrical leads on a dark background.

Assembly

PEI delivers durable and reliable assembled components found in power-generating, life-saving, and high-technology applications worldwide. Our expert team of engineers and operators will ensure our partners receive ready-to-implement solutions that will last.

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assembly

Quality Assurance

The PEI Quality Assurance team analyzes every thin metal part and component to ensure its precision, accuracy, and durability. Our team uses a combination of technological and manual inspection techniques to check for imperfections before any part or component leaves our facility.

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Technician performing quality inspection by marking a photochemical-etched metal sheet during manufacturing.

Our first job is establishing trust to inspire a spirit of partnership.

Industries and technologies evolve when people work together to push boundaries and uncover new solutions. For over 50 years, we’ve stood shoulder to shoulder as leading companies across every market sector push forward with revolutionary changes that change the world. We are ready to share and leverage knowledge and expertise to collaborate with our customers for mutual success.

Partner with the Tungsten Etching Experts

Tungsten components demand specialized manufacturing expertise. Its unique properties, including exceptional hardness and brittleness, require fabrication methods capable of delivering complex geometries without introducing stress or distortion or compromising material integrity.

PEI delivers that expertise through decades of experience in photochemical etching, providing high-precision tungsten components for aerospace, semiconductor, medical, and energy applications.

Partner with PEI to develop high-performance tungsten components engineered for the most demanding applications.

Stainless steel precision-etched mesh sheet with repeating micro-patterned geometry.
Stainless steel precision-etched mesh sheet with repeating micro-patterned geometry.

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Reviewed, Tested and Compliant

PEI’s long history of meeting and exceeding industry standards and customer expectations began in 1968. For over 50 years, we’ve kept quality assurance at the forefront of our work by training our manufacturing teams, maintaining our equipment, and establishing rigorous internal controls. PEI holds several certifications, including ISO9001:2015, AS9100:2016, and ITAR. We adhere to MIL-STD-45662, MIL-STD-105, and ANSI/ASQC Z1.4 quality standards.