Microdispensing
What is Microdispensing?
Microdispensing is a dispensing process where smallest quantities of adhesives and other liquids in the microliter to nanoliter range are applied precisely and reproducibly. This technology is crucial for miniaturization in electronics, optics, and medical technology.
Properties of Microdispensing
- Dispensing quantities from a few nanoliters to microliters
- Highest reproducibility and accuracy
- Contactless application possible
- Minimal material waste
- High cycle rates for series production
- Integration into fully automated production lines
Microdispensing Technologies
- Jet Valves: Contactless droplet dispensing
- Needle dispensing: Contact-based precision application
- Piezo dispensing: Electrically controlled volume displacement
- Activis Technology: Combined dispensing and curing
Applications
- Medical Electronics: Miniaturized sensor bonding
- Die Attach: Chip bonding in sub-millimeter range
- Camera Module Adhesive: Lens and sensor positioning
- Glob Top: Precise bond wire protection
Material Requirements for Microdispensing
- Low and stable viscosity for uniform flow
- Defined flash-off time after dispensing
- IBOA-free formulations for safe processing
- Thixotropic properties for droplet stabilization
Process Parameters
- Dispensing volume: 0.001 to 10 microliters
- Positioning accuracy: ± 10 µm and better
- Repeatability: Volume error below 2%
- Controlled bond line for defined layer thickness
Quality Assurance
- Optical inspection after each dispensing
- Gravimetric verification of dispensing quantities
- Shelf life monitoring of materials used
- Statistical process control
DELO Adhesive Solutions
- Microdispensing-optimized adhesive formulations
- Conductive Adhesives for electrical micro-contacting
- Technical consulting for microdispensing processes
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