Hummink

Paris,  France
https://hummink.com

• Booth: 7239

Hummink: Redefining printing for next-gen manufacturing

Overview

High Precision Capillary Printing (HPCaP) technology redefines printing at the micron scale by leveraging capillary forces and resonance, eliminating the need for external energy sources such as UV, lasers, or pressure. Inspired by Atomic Force Microscopy (AFM), HPCaP employs a glass micropipette attached to a macro-resonator oscillating at controlled frequencies. This mechanism enables precise material deposition with resolutions from 50 µm down to 100 nanometers, adapting seamlessly to substrate topography in real time.  Unlike conventional inkjet printing; HPCaP relies solely on capillarity, allowing the deposition of a wide range of materials as well as high viscosity materials, including polymers, conductive inks, and biomaterials. Its ability to print high-aspect-ratio structures and fine interconnects makes it ideal for semiconductor packaging, display repair, biosensors, and even watchmaking. With its sub-micron accuracy, adaptability, and compatibility with numerous inks, HPCaP stands as a versatile and sustainable solution for next-generation manufacturing challenges.

  Press Releases

• Patterning and repair of transparent conductive oxide films with capillary printing (Oct 03, 2025)

  Thin films of Transparent Conductive Oxides (TCO) are used as electrodes or optical filters in display devices. Although ITO (Indium Tin Oxide) usage is widespread today, alternative materials such as ZnO (zinc oxide) or SnO2 (tin dioxide) are promising, yet they remain challenging to pattern at the micrometer scale. Using the High Precision Capillary Printing (HPCaP) technology developed by Hummink, thin masking layers of polymers are printed on a silicon sample before deposing a TCO layer by Atomic Layer Deposition (ALD). Removing the polymer yields the expected pattern with a pixel size smaller than 5μm. Alternatively, ZnO can be directly printed by HPCaP using a suspension of nanoparticles. Our approach shows promises for prototyping and repair of TCO-based display devices.

  Read the article here : (link) 

• Tunable membrane-less dielectrophoretic microseparation by crossing interdigitated electrodes (Oct 03, 2025)

  Separation is a crucial step in the analysis of living microparticles. In particular, the selective microseparation of phytoplankton by size and shape remains an open problem, even though these criteria are essential for their gender and/or species identification. However, microseparation devices necessitate physical membranes which complicate their fabrication, reduce the sample flow rate and can cause unwanted particle clogging. Recent advances in microfabrication such as High Precision Capillary Printing allow to rapidly build electrode patterns over wide areas. In this study, we introduce a new concept of membrane-less dielectrophoretic (DEP) microseparation suitable for large scale microfabrication processes. The proposed design involves two pairs of interdigitated electrodes at the top and the bottom of a microfluidic channel. We use finite-element calculations to analyse how the DEP force field throughout the channel, as well as the resulting trajectories of particles depend on the geometry of the system, on the physical properties of the particles and suspending medium and on the imposed voltage and flow rates. We numerically show that in the negative DEP regime, particles are focused in the channel mid-planes and that virtual pillars array leads either to their trapping at specific stagnation points, or to their focusing along specific lines, depending on their DEP mobility. Simulations allow to understand how particles can be captured and to quantify the particle separation conditions by introducing a critical DEP mobility. We further illustrate the principle of membrane-less DEP microseparation using the proposed setup, by considering the separation of a binary mixture of polystyrene particles with different diameters, and validate it experimentally.

  Read the article here : (link)

  Products