Application Cases

【Overview】
In this study, the Aigtek ATA-P2010 power amplifier was used to build a new control strategy experimental platform for a strike-type piezoelectric jetting system. Micro-dispensing of adhesives is a key process in large-scale integrated circuit packaging, but traditional methods face performance limitations due to multiple sources of uncertainty. Although strike-type piezoelectric jetting technology offers high frequency and high precision, the time-varying uncertainty of the rheological properties of adhesives makes the dispensing mechanism complex. Existing research lacks systematic analysis of uncertain rheological properties, electromechanical-fluid coupling dynamics, and reliability assessment. This paper presents an interval process model, high-fidelity coupling modeling, reliability analysis, and Bezier curve optimization control, combined with theory, simulation, and experiment, to reveal the evolution of adhesive dispensing performance and provide a new approach for the design of high-performance piezoelectric jetting systems.

Experiment Name: Quality and Consistency Analysis of Colloidal Droplet Bubbles

Experiment Principle:
This study is based on the interval process theory of uncertainty in the rheological properties of adhesives and the electromechanical-fluid coupling dynamic model of a strike-type piezoelectric jetting system. The inverse piezoelectric effect of the piezoelectric stack drives the striker to produce high-frequency reciprocating motion, enabling precise micro-dispensing of adhesives. Through the measurement and prediction model of multi-source uncertainty parameters, combined with a high-fidelity Matlab-Fluent multi-field coupling analysis platform and experimental setup, dynamic simulations and validation are performed. The innovative use of Bezier curve-driven waveform optimization and an active learning RBFNN surrogate model for reliability assessment demonstrates that the method can effectively reduce air backflow and improve droplet volume consistency under high-frequency dispensing, providing a high-precision, high-reliability control solution for adhesive micro-dispensing in large-scale integrated circuit packaging.

Experimental Block Diagram:

Experimental Setup Photos:

Experimental Procedure:
An optimized voltage waveform was applied to the strike-type piezoelectric jetting system through a piezoelectric controller. A high-speed camera and measuring instruments were used to monitor the droplet dispensing dynamics in real time. The results showed that under optimal control parameters, droplet volume consistency was significantly improved (length variance reduced to 0.0167, height variance reduced to 0.025), and the number of bubbles was greatly reduced completely suppressed under the BP30Up14 parameter), with a theoretical-to-experimental error of less than 1%. Using a genetic algorithm to dynamically adjust the Bezier curve parameters, air backflow was reduced by more than 20%, the dispensing frequency reached 181.8 Hz, and bubble issues were quickly suppressed, validating the effectiveness of the model and method, and providing reliable support for electronic packaging.

Application Scenarios:
Adhesive micro-dispensing, strike-type piezoelectric jetting system, piezoelectric stack actuation, multi-source uncertainty analysis, rheological property modeling, Bezier curve optimization, electromechanical coupling model

Advantages of Aigtek Amplifiers in This Application:

1. High power drive capability (1300 Wp) – Generates sufficient striker driving force to achieve stable high-frequency dispensing at 181.8 Hz.

2. DC–20 kHz wide bandwidth and high slew rate – Accurately reproduces Bezier curve-optimized waveforms, enabling high-speed jetting and rapid bubble suppression.

3. Digitally adjustable fine gain control and real-time monitoring – Supports comparison of multiple control strategies.

Recommended Product: ATA-P Series Power Amplifier

Figure: ATA-P Series Power Amplifier Specifications and Parameters

The experimental materials in this article are compiled and released by Xi'an Aigtek Electronics. Aigtek has become a large-scale instrument and equipment supplier with a wide range of products in the industry. Demo units are available for free trial. Xi'an Aigtek Electronics is a high-tech enterprise specializing in the research, development, production, and sales of electronic testing instruments such as power amplifiers, high-voltage amplifiers, power signal sources, preamplifiers for weak signals, high-precision voltage sources, and high-precision current sources.