Stamping:

Sometimes known as daubing or pin transfer, this method involves dipping a compliant tool into a reservoir of liquid material then transferring the adhering liquid onto a substrate. This method is frequently used to attain very small dots. However, the process is considered slow as compared to other methods especially if the application requires multiple dots dispensing. To increase throughput, gang (multiple) stamping tool can be employed to stamp an array of dots simultaneously. Grid type stamping tool is also available to print a large area.

Stencil printing is the fastest and most efficient way of applying adhesive to a large area in mass production runs. In this method, a patterned stencil is placed over the substrate and a squeegee force the material through the stencil apertures onto the substrate. This may become complicated when the stencil apertures become so small that the material can no longer print effectively.

Non-contact jet-dispensing is one of the newer methods in dispensing technologies. Shots of fluid are fired onto the substrate in a non-contact process. Since dispensing dots are typically restricted to one specific size during a run, larger volumes are achieved by accumulating multiple dots. By moving the jet head during deposition, required patterns can be formed.

In this method, time and air pressure is commonly used to push the fluid through a needle or nozzle to form single dot or multiple dot patterns over the substrate. Over the years, various dispensing platforms with programmable pumps and valves, such as auger and piston have been developed to achieve unique patterns or volumes using single needle or special tapered nozzle. These platforms could either be stand-alone dispensing equipment or integrated on those new pick and place machines.