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What Is Selective Etching

What Is Selective Etching

Selective etching refers to a process used in materials science and microfabrication where a specific material is preferentially removed from a substrate while leaving other materials unaffected or with minimal etching. It is a controlled chemical or physical process used to create specific patterns or features on a material surface.

The selective etching process involves the use of an etchant that specifically reacts with the material to be removed while not significantly affecting the surrounding materials. The etchant can be a liquid or a gas, depending on the application and the materials involved.

There are different methods of selective etching, and the choice of technique depends on the specific materials and desired results. Here are a few examples of selective etching techniques:

  • Wet Etching: This method involves immersing the material in a liquid etchant that preferentially reacts with the target material, causing it to dissolve or corrode. The choice of etchant depends on the material being etched. For example, in microelectronics, hydrofluoric acid (HF) is commonly used to selectively etch silicon dioxide (SiO2) while leaving silicon (Si) unaffected.
  • Dry Etching: Dry etching techniques, such as plasma etching or reactive ion etching (RIE), use gases to etch materials. The process involves bombarding the material surface with energetic ions or reactive species generated in a plasma. The ions react with the material, causing it to be removed. Selectivity is achieved by choosing a gas mixture that reacts with the target material more readily than with the surrounding materials.
  • Chemical Mechanical Polishing (CMP): CMP is a combination of chemical and mechanical processes used to selectively remove material from a surface. It involves the application of a slurry containing abrasive particles and a chemical agent. The mechanical action of the abrasive particles removes the material, while the chemical agent enhances selectivity and surface quality.

Selective etching plays a crucial role in many technological advancements and is instrumental in the production of microelectronic devices, integrated circuits, microfluidic devices, and various types of sensors. It enables the fabrication of intricate structures with high precision, allowing for the miniaturization and improved performance of many devices.

Selective Etching Service – China Selective Etching Company

Metal Etching From Prototyping to Production
  • Be-cu Prototype with 16 total automatic etching lines (10 horizontal and 6 vertical etching lines) which can deal with massive demand that request 700K piece per day as well as your individual customized small size requesting proceed by half automatic etching line.
  • We have ful set of automatic production lines for cleaning, coating, development, etching and stripping etc with strong.
  • Smallest line width 0.015mm, aperture 0.03mm with smallest tolerance as t 0.01mm can be fulfilled to meet your requirements
  • Be-cu uses state-of-the-art digital imaging machines to precisely map designs onto the metal sheets and eliminate variations so production remains consistent – as do we.
High-Tech Etching Equipment And Workshops
The introduction of domestic and foreign advanced production equipment such as exposure machine, etching machine, developing machine, cleaning machine, vertical etching machine, film laminating machine, etc. Speed is guaranteed.
It has a factory building covering an area of 10,000 square meters, equipped with a 100,000-level dust-free workshop, 16 etching production lines, and more than 120 employees, which can greatly meet the production needs of customers.
Multi-level Quality Control And Value-Added Services
Multi-level Quality Control And Value-Added Services
From incoming material inspection to finished product shipment, we strictly control every detail to ensure quality assurance. Multi-directional processing and cooperation meet customers’ one-stop procurement needs.In addition to photoetching services, we also provide you with other secondary processing services, such as electroplating, anodizing, sandblasting, wire drawing, metal stamping, oil injection, oil filling, assembly and other processing procedures. If you need us to provide secondary processing services, please feel free to contact us

Selective Etching Process In BE-CU Prototype

Automatic Shearing
Automatic Shearing
Automatic Baking Line
Automatic Baking Line
Automatic Baking Line
Automatic Baking Line

Surface Finishing Options for Selective Etching

Parts made using photo etching usually feature excellent finishes. At, we offer various custom finishing options that boost the produced part’s functionality, appearance, and durability.


Precision Selective Etching Parts & Case Studies In China

Because Be-cu is so specialized in metal manufacturing, we are the China Selective Etching of choice. has over 95,000 square feet of manufacturing space in three locations. Our unparalleled level of automation and our deep dedication to quality support our proud tradition of outstanding customer service. All Be-cu Selective Etching facilities offer a wide variety of unique services and capabilities that allow us to produce the highest caliber of custom metal etching in both large and small quantities – quickly and will make the difference in your project. Contact Be-cu at [email protected] or request a quote with our easy-to-use online form.

  • Hollow Laser Cutting Brass 360 Jewelry

  • Laser Cut And Etching 303 Jewelry Pendant

  • Precision Etching FeCrAl Resistor Sheet For Electronics Products

  • Photo Chemical Etching Microporous Dust Filter For Automotive Speaker

  • Precision Etching Automotive Audio Grille

  • Metal Etching 5 Inch Round Car Horn Protection Net

Selective Etching for Industrial Applications

Selective Etching affords both machinists and industries extensive benefits—little wonder why it has become the go-to process for metal fabrication.Selective Etching facilitates the high-precision production of prototypes and thin parts regardless of volume. Here are the industrial applications of Selective Etching parts according to industries.

Metal Etching for Industrial Applications

Be-cu’s etching services meet these needs by providing faster product turnaround without compromising quality so your products can reach consumers and their homes faster than your competition. Whether your needs include mass-produced samples or not, we’re up to the challenge. With Be-cu we can usually produce a prototype within 24 hours.

  • 3C Products
  • Medical Device Parts
  • Pilotless Aircraft Parts
  • Vehicle Parts
  • Intelligent Component
  • DIY Toys
  • RF/Microwave
  • Electronics (In the electronics industry, etching is used to produce a wide variety of products such as printed circuit boards, step templates, EMI/RF shielding, foil strain gauges)
  • Signs, labels and nameplates (such as industrial nameplates and labels, souvenirs, hotel signs, elevator doors, trophies and trophies, wayfinding signs)

Online Cooperate With Selective Etching Company

Be-cu works with customers all over the world to bring customers ideas to life with the highest quality precision engineered metal components on the planet. We have both precision etching and molds making capabilities that include both conventional and modernized production line. If you are looking for a partnership to help you apply new tools and technologies, or help you fully realize your design vision, let us help you move your business forward, contact our team ([email protected])or quote online today to get the conversation started.