On the Planarization Mechanism and Pad Aging Effects of Soft Pad Polishing: A Perspective from the Micro-Mechanical Properties of Soft Pads

Yeau-Ren Jeng, Ping Chi Tsai, Yu Zheng Lin

Research output: Contribution to journalArticle

Abstract

The local viscoelastic properties of soft polishing pads with different usage durations are measured by a micro-scale mechanical analysis testing platform. The testing reveals stimulus-adaptive local viscoelasticity of soft pads under the activation of asperity contact. This phenomenon suggests asperity-dependent local modulus. Such an increase of local modulus induced by higher asperity provides a further enhancement effect to the planarization of surface asperity. Furthermore, the measurement outcomes suggest that the reaction of local micro-scale viscoelastic properties of the soft pad surface to the workpiece asperity will decay with usage time. The current study provides a detailed understanding of the aging effects for the soft pad and explains the performance decay during soft pad polishing from a local micro-scale interfacial perspective.

Original languageEnglish
Article number064501
JournalJournal of Tribology
Volume141
Issue number6
DOIs
Publication statusPublished - 2019 Jun 1

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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