Investigating the effects of AC voltage signals on micro-channels machined with the Spark Assisted Chemical Engraving process

Spark-Assisted Chemical Engraving (SACE) is a non-conventional method for microfabrication in glass. The process relies on multiple parameters for machining, but its stochastic nature often reduces the predictability of machining outcomes. While prior work has studied various individual parameters, the influence of voltage waveforms has been largely neglected. This study filled that gap by using the voltage waveform as a tool for real-time process control and outcome prediction. Pulse, sinusoidal, and triangular waveforms were evaluated on how they affected key process signatures extracted from the current signal. These signatures were then quantified and correlated with surface quality and channel morphology. Sodium and potassium hydroxide solutions were used, and the combined effects of electrolyte type and waveform were mapped to show how they affected machining efficiency. The study also examined temperature in SACE by comparing heat-assisted and non-heated conditions, demonstrating how added thermal energy further tuned machining performance.

Name thesis:degree_name

Master of Applied Science (MASc)

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Ontario Institute of Technology

Year dc:date.issued

2026

Author dc:creator

• Ganza, Carmel

Advisor dc:contributor.advisor

• Abou Ziki, Jana

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/10155/2083

OAI identifier oai:identifier

oai:ontariotechu.scholaris.ca:10155/2083