Step Lids

Step lids are an important component in the electronics industry, as they are used to provide a hermetic seal between the package lid and base. Etching technology has become a popular method for producing step lids due to its many advantages and characteristics. In this article, we will discuss the application, advantages, and characteristics of etching technology for step lids. Application: Etching technology is used to fabricate step lids by removing material from a metal plate using a chemical process. The metal plate is coated with a photoresist material, which is then exposed to UV light through a mask. The exposed photoresist is then developed, leaving behind a patterned layer on the metal plate. The metal plate is then etched using an acid solution, which removes the unprotected metal and leaves behind the desired step lid geometry.

Advantages: Etching technology offers several advantages for producing step lids:

  • High Precision: Etching technology allows for the creation of intricate step lid geometries with high precision and accuracy.
  • Flexibility: Etching technology is highly versatile and can be used to produce step lids in a wide range of shapes and sizes.
  • Hermeticity: Step lids produced using etching technology can provide a high level of hermeticity, ensuring that the electronic components within the package are protected from external contaminants.
  • Reduced Manufacturing Costs: Etching technology allows for the production of step lids in high volumes with reduced material waste, resulting in lower manufacturing costs.

Difference between traditional sheet metal precision processing VS Chemical etched sheet metal processing

VECO’s video to learn what metal etching is.
Comments related to etching technology:
From @chadr2604: There is another way it involves stacking many layers of very thin material with an There is another way it involves stacking many layers of very thin material with an adhesive, pressing the stack, then either stamping or punching the blank then heating it to release the adhesive. The parts will not be as accurate the tolerance is limited to about .002″ but if its good enough its much faster.
From @chadr2604: If you try to cut that stack with a laser you will just start a fire we had an aluminum fire trying that.

Modern precision sheet metal fabrication includes a common technique known as etching, which differs from traditional sheet metal fabrication in several ways. Here are some key differences between etching and traditional precision sheet metal fabrication:

    • Principle: Traditional sheet metal fabrication typically involves mechanical processes such as cutting, bending, and punching to shape and form metal sheets. Metal etching by Metal Etching Machine , on the other hand, is a chemical process that uses specialized etchants to selectively corrode the metal surface, achieving precise etched patterns and features.
    • Accuracy and Complexity: Etching offers advantages in terms of precision and complexity. By controlling the composition, concentration, temperature, and etching time of the etchant, extremely fine etching can be achieved with accuracy down to sub-micron levels. Additionally, etching allows for the creation of intricate geometries, microstructures, and patterns that may be difficult to achieve using traditional mechanical methods.
    • Processing Speed and Cost: Etching generally offers faster processing speeds, particularly in large-scale production. In comparison, traditional mechanical fabrication methods may require more time and cost to achieve the same level of precision and complexity.
    • Materials Compatibility: Etching techniques are applicable to a range of metal materials, such as copper, aluminum, stainless steel, and titanium. Traditional sheet metal fabrication methods may have limitations when it comes to certain materials or thicker metal sheets.
    • Design Flexibility: Etching provides greater design flexibility. By incorporating techniques like photolithography or screen printing during the etching process, complex patterns and structural designs can be achieved. This makes etching suitable for applications in microelectronics, optical devices, microfluidic devices, and more.

Characteristics: Etching technology also has several key characteristics that make it well-suited for producing step lids:

  1. Corrosion Resistance: Step lids produced using etching technology can be made from a variety of corrosion-resistant materials, including stainless steel and nickel alloys.
  2. Tight Tolerance Control: Etching technology allows for tight tolerance control, ensuring that the step lid fits precisely onto the package base.
  3. Low Profile: Etching technology allows for the creation of step lids with a low profile, making them ideal for use in applications where space is limited.

In conclusion, etching technology offers several advantages and characteristics that make it well-suited for producing step lids. With its high precision, flexibility, hermeticity, and reduced manufacturing costs, etching technology is a key technology in the production of step lids. If you have any questions about etching technology or need assistance with your step lid project, please do not hesitate to contact us.