Nickel Silver is an extremely useful metal due to its high resistance to heat and corrosion
This makes Nickel Silver a popular choice when developing a variety of components particularly RFI, EMC & EMI screening cans and shields for PCB's . At Qualitetch, we are able to offer both Nickel or Nickel Silver for any applications you require.
Photo etching is a precise and intricate manufacturing process used to produce high-quality metal components with fine detail and accuracy. When applied to nickel silver, it showcases exceptional versatility and durability, making it a preferred material for various industries.
Nickel silver, despite its name, doesn't contain silver. Instead, it's an alloy composed primarily of copper, nickel, and zinc. This amalgamation results in a metal that boasts excellent corrosion resistance, high ductility, and superb electrical conductivity, making it an ideal choice for photo chemical etching.
The chemical etching process begins with a sheet of nickel silver, which undergoes a meticulous sequence of steps. Initially, the metal is thoroughly cleaned and prepared to ensure the surface is free from impurities. A light-sensitive photoresist material is then applied to both sides of the sheet, creating a protective layer.
Next comes the phototooling stage, where a precise photographic image of the desired component is transferred onto the photoresist using UV light. This exposure creates a chemical reaction, hardening the areas that correspond to the intended design while leaving the rest of the photoresist unchanged.
Subsequently, the sheet is submerged in an etchant solution, typically a ferric chloride acid, which selectively removes the unprotected areas of the metal. The etchant dissolves the unhardened photoresist and chemically erodes the exposed metal, leaving behind the intricately designed components.
The etching process allows for unparalleled precision and intricacy, enabling the creation of intricate patterns, fine meshes, complex geometries, and precise features on the nickel silver sheet. It can produce components with tolerances as tight as a few micrometers, ensuring consistent and accurate parts.