Transferring viscous materials

The use of individually addressable resistive heating elements in controlled time-dependent cycles addresses the challenge of precise deposition of high viscosity materials on substrates with varying topographies, ensuring minimal deformation and shear forces.

JP7721574B2Active Publication Date: 2025-08-12NEDERLANDSE ORG VOOR TOEGEPAST NATUURWETENSCHAPPELIJK ONDERZOEK TNO
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Patent Information

Application Number
JP2022568877
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-05-12
Filing Date
2021-05-12
Publication Date
2025-08-12
Estimated Expiration
2041-05-12

AI Technical Summary

Technical Problem

Existing methods for transferring high viscosity functional materials, such as conductive or insulating pastes, face challenges in achieving precise deposition with minimal deformation due to shear forces, especially when applying to substrates with varying topographies, and require complex heat flux control to avoid overheating.

Method used

A method using individually addressable resistive heating elements to heat viscous functional materials in controlled time-dependent cycles, generating gas at the material interface for precise transfer, allowing adaptation to substrate morphology and minimizing deformation.

Benefits of technology

Enables precise, deformation-free transfer of high viscosity materials onto substrates with varying topographies, achieving controlled heat distribution and reduced shear forces, even over significant distances.

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Abstract

The present disclosure provides a method for transferring a viscous functional material onto a receiving substrate. The method includes providing a plate (10) having a cavity surface (11) containing cavities (12). The method further includes providing a plurality of individually addressable resistive heating elements (131, 132, 133) in thermal contact with respective regions (121, 122, 123) of the cavity (12). The method provides a viscous functional material within the cavity having a material composition that, when heated sufficiently, generates a gas at an interface between the cavity surface and the functional material within the cavity, thereby transferring the functional material from the cavity onto the receiving substrate via gas generation. According to the improved transfer method, respective portions of the viscous functional material within each region of the cavity are heated by supplying respective time-dependent magnitudes of power (C131, C132, C133) to each of the plurality of individually addressable heating elements.
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Citation Information

Patent Citations

  • Thermoelectric printing machine for transferring ink to a recording medium

    JP1997511459A

  • Liquid ejection head

    JP2005305966A

  • Method for depositing a functional material on a substrate

    US20170268100A1