For lab-scale tape casting and thin-film preparation, a four-side film applicator (also known as a Frame-type or Quadruple applicator) is a highly efficient tool. It allows you to cast films of four different fixed thicknesses using a single device by simply rotating it to the desired side.

The benefits of Fixed-Gap Applicators: (1) High Repeatability: Unlike adjustable micrometer blades, fixed-gap applicators eliminate human error in setting the height. This ensures that every film cast is exactly the same thickness. (2) Durability: Typically machined from hardened stainless steel or corrosion-resistant alloy, making them compatible with various solvents and easy to clean. (3) Efficiency: The four-sided design is ideal for researchers who frequently switch between a set range of thicknesses (e.g., 50µm, 100µm, 150µm, 200µm) for comparative studies.

The four-side film applicator with fixed gap is specially designed as accessories for mini tap casting coater (ESSTCCHVB) 

References:

J. Ko, et al., Thin cathode for thermal batteries using a tape-casting process, Ceramic International, 2017, 43, 5789-5793

F. Shen, et al., Tape Casting of Thin Electrolyte and Thick Cathode for Halide-Based All-Solid-State Batteries, J. Electrochem. Soc., 2023, 170, 100505

H. Zhao, et al., Tape-Casting Fabrication Techniques for Garnet-Based Membranes in Solid-State Lithium-Metal Batteries: A Comprehensive Review, ACS Appl. Mater. Interfaces 2024, 16, 50, 68772–68793.