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A Sharp Phase Transition Polymer for High Spatial Selectivity in Microtransfer Printing.

Jingyang Zhang¹, Lizhou Yang¹, Qinhua Guo¹

¹Smart Manufacturing Thrust, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou 511400, China.

ACS Applied Polymer Materials

|January 1, 2026

Summary

This summary is machine-generated.

A novel sharp phase transition polymer (SPTP) enhances microtransfer printing (MTP) resolution. This material enables precise adhesion control for high-resolution selective transfer in flexible electronics.

Keywords:

adhesion modulation flexible electronics microtransfer printing sharp phase transition polymer spatial resolution

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Area of Science:

Materials Science
Mechanical Engineering
Polymer Science

Background:

Microtransfer printing (MTP) is crucial for flexible electronics and heterogeneous integration.
Increasing device integration poses challenges for spatial utilization in MTP.
Optimizing spatial resolution is key for advanced MTP applications.

Purpose of the Study:

To enhance the spatial resolution of microtransfer printing (MTP).
To introduce a novel sharp phase transition polymer (SPTP) for MTP applications.
To demonstrate high-resolution selective transfer using the developed SPTP.

Main Methods:

Utilized in situ characterizations to analyze SPTP properties.
Performed dynamic adhesion force measurements.
Employed the SPTP in a microtransfer printing stamp for high-resolution transfer.

Main Results:

SPTP demonstrated a significant modulus change within a narrow temperature window.
The material exhibited a distinct phase boundary, enabling precise thermal adhesion control.
Achieved high-resolution selective transfer with a chip spacing of 10 μm.

Conclusions:

SPTP's sharp phase transition property is key to enhancing MTP spatial resolution.
The material's switchable adhesion properties facilitate precise, high-resolution selective transfer.
SPTP provides a material basis for achieving superior spatial resolution in MTP.