KPS4000 Ultra Precision Piezo Jet Valve — 0.5nL Minimum Volume, High Repeatability for Advanced Packaging

Product Overview

The KPS4000 is built for ultra‑small drops and tight placement in advanced packaging and microassembly. This piezo jet valve reliably produces droplets down to 0.5 nL while keeping shot‑to‑shot variation low, making it suitable for die attach, micro‑bonding and optical module work. Available configurations include UV‑safe, corrosion‑resistant and other wetted‑material options to match your fluid chemistry.

Problem

Many packaging processes fail when dispensers cannot place ultra‑small drops consistently. Production yield drops and rework rises when dots vary or bridge fine pads.

Cause

Inconsistent micro‑dispensing usually stems from mismatched nozzle choice, unstable pressure feed, or drive timing not tuned for the fluid. Small geometry pads and changing fluid viscosity make stable meniscus control harder at sub‑nL volumes.

Solution

Conclusion: the KPS4000 combines fine nozzle options, precise pulse control and a compact fluid path so you can achieve repeatable 0.5nL drops and tight placement. The valve reduces stringing and nozzle wear by using short, well‑timed pulses and offers optional wetted materials to reduce chemical wear in harsh adhesives.

Application 

• Advanced IC packaging: precise adhesive dots for die attach and micro‑scale bonding.
• Optical modules and camera arrays: index‑matching gels and tiny adhesive dots with low overflow.
• Connector and sensor micro‑assembly: accurate sealing and spot bonding on small pads.
• R&D and pilot lines: test new fluids and small‑volume patterns before scaling.

How It Works 

Conclusion: micro‑drops are formed by short, precise piezo pulses matched to nozzle and pressure. A fast pulse creates a pressure wave that ejects a controlled micro‑droplet. Pulse width and amplitude set volume while steady inlet pressure and short fluid path keep the meniscus stable. For sub‑nL work, fine nozzles and careful pulse tuning are essential.

How To Choose 

Conclusion: pick nozzle, wetted material and driver settings based on droplet size, fluid viscosity and mounting limits.

1. Confirm target volume and choose the closest nozzle diameter.
2. Provide fluid viscosity at working temperature and any filler details for sample testing.
3. Verify required cycle rate and ensure valve frequency meets throughput needs.
4. Select wetted material for chemical compatibility (316L, PTFE, ceramic).
5. Use a stable pressure regulator and capture a short tuning run to lock pulse width and amplitude.
6. Plan spare nozzles and a cleaning schedule for production.

FAQ

Q1: Can the KPS4000 reliably make 0.5nL drops in production?
A1: In many cases yes. Stable 0.5nL production requires correct nozzle, steady inlet pressure and tuned pulse settings. We recommend a sample test to confirm for your fluid and cycle rate.

Q2: What nozzle should I use for sub‑nL work?
A2: Start with the 0.08 mm nozzle for the smallest volumes and test medium nozzle if stringing occurs. Nozzle choice depends on fluid surface tension and viscosity.

Q3: How do I check fluid compatibility?
A3: Send the fluid viscosity at working temperature and SDS. We run bench trials and recommend wetted materials and nozzle options.

Q4: What driver and pressure source do I need?
A4: Use a piezo driver compatible with high repetition rates and a stable regulator that avoids pressure dips. We advise specific driver models based on your throughput.

Q5: Do you offer sample testing?
A5: Yes. Send a fluid sample and target droplet size; we will run tests, record droplet CV and provide recommended settings and a short report.