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Updated: Jul 12, 2025

Fabrication of Fine Electrodes on the Tip of Hypodermic Needle Using Photoresist Spray Coating and Flexible Photomask for Biomedical Applications

Fabrication of Fine Electrodes on the Tip of Hypodermic Needle Using Photoresist Spray Coating and Flexible Photomask for Biomedical Applications

Published on: November 28, 2017

A Planar-Type Micro-Biopsy Tool for a Capsule-Type Endoscope Using a One-Step Nickel Electroplating Process.

Sangjun Moon^1,2,3

¹Department of Mechanical Convergence Engineering, Gyeongsang National University, Changwon 51391, Gyeongsangnam-do, Republic of Korea.

|October 28, 2023

Summary

This summary is machine-generated.

Researchers developed novel electroplated nickel micro-biopsy tools for capsule endoscopes. These tools offer sharp tips and efficient tissue extraction for minimally invasive diagnosis and cancer biopsies.

Keywords:

capsule-type endoscope one-step electroplating planar-type micro-biopsy tool

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Last Updated: Jul 12, 2025

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Tools for Surface Treatment of Silicon Planar Intracortical Microelectrodes

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Area of Science:

Biomedical Engineering
Materials Science
Minimally Invasive Surgery

Background:

Millimeter-scale biopsy tools are common in minimally invasive surgery.
Capsule endoscopes require micro-scale biopsy tools with high precision.
Conventional machining is not cost-effective for micro-scale features.

Purpose of the Study:

To design and fabricate planar-type electroplated nickel micro-biopsy tools for capsule endoscopes.
To evaluate the performance of these micro-biopsy tools for in vitro tissue dissection.
To assess their suitability for clinical applications like cancer tissue biopsy.

Main Methods:

Utilized a thick photoresist (SU8) mold for one-step lithography.
Employed nickel electroplating to fabricate planar micro-biopsy tools.
Conducted in vitro tissue dissection experiments using mouse intestine.

Main Results:

Successfully fabricated micro-biopsy tools with sharp tips and planar shapes.
Evaluated various design features, including tip taper angle and scalpel geometry.
Demonstrated efficient tissue extraction with sufficient strength and sharpness for clinical use.

Conclusions:

Electroplated nickel micro-biopsy tools are a cost-effective solution for capsule endoscopes.
These tools enable precise tissue sampling for diagnosis and cancer detection.
The fabrication method is scalable for mass production and integration with endoscopic devices.