What is Fixed Frame Stencil
A fixed frame stencil is a type of solder paste template used for high-volume screen printing on printed circuit boards. Unlike frameless stencils, which allow for stencil changes, fixed frame stencils are permanently attached to a solid or hollow aluminum frame. This fixed attachment ensures stability and accurate alignment during the screen printing process.
Fixed frame stencils are recommended for production runs where a consistent and reliable stencil is required. They are typically more expensive than frameless stencils but offer the advantage of durability and longevity. The stencil foil is stretched taut within the frame using the edge of the net, preventing any misalignment or movement that could result in defects in the printed circuit board.
The commonly available size for a fixed frame stencil is 20″ x 20″. These stencils are designed to withstand high-volume printing and are double-bonded for increased wear resistance. However, it is important to consider that any changes needed to be made to the stencil would require replacing the entire stencil and frame assembly.