Jetting or non-contact dispensing is an additive process where a material is deposited by rapidly shooting it at a substrate without making any physical contact.
Like dispensing, it is a drop on demand process which produces consistent results and minimum material wastage. It is a versatile process which allows device designers to make advanced package designs for smaller and more interesting products as a material can be deposited in any shape or pattern.
Jetting based dispensing for electronic packaging and precision manufacturing allows device designers to make advanced package designs for smaller and more interesting products.
The following features make it useful for flip-chip underfilling and stacked-die applications. It has been used to manufacture flat panel displays and sensitive MEMS device packaging.
For packaging applications, jetting is particularly useful for underfills and stacked-die applications where the components are laid out closely together with very small spaces between them.
It has been used to manufacture flat panel displays and sensitive MEMS device packaging. Jetting can also be used for conformal coating and glob-top encapsulations.
It offers an accurate, repeatable and consistent method of encapsulation.
The shape and size of the encapsulation is only limited by the maximum deposition area of the stages and is compatible with a wide range of substrates and materials.
The advanced packaging facility has a Nordson table top industrial jetting system. It consists of a robotic 3-axis movement stage, Integrated Keyence vision system, Nordson PICO valve and Nordson valve driver.
The following are the specifications of the jetting system.
- Maximum deposition area – 300 mm x 320 mm
- Maximum speed – 800 mm/s
- Resolution – 5 micrometres
- Pressure range – 14.5- 1450 psi
- Repeatability – 7 micrometres
- Minimum valve opening time – 0.1 ms
The following are the jetting parameters which are used for defining a jetting deposition.
- Jetting pressure
- Jetting time – period of time where the valve opens
- Speed of movement of stages
- Nozzle orifice diameter
- The gap between consecutive droplets/lines
The nozzle in the case of jetting systems is often an opening in a plate attached to a jetting head. Different diameter nozzles can be applied to the jetting head to gain control over the deposition.