On the Planarization Mechanism and Pad Aging Effects of Soft Pad Polishing: A Perspective From the Micro-Mechanical Properties of Soft Pads
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 18, 2019
- Source ID
- 10.1115/1.4043348
Entities
People
- Ping-chi Tsai
- Yeau-Ren Jeng
- Yu-zheng Lin
Organizations
- Air Force Office of Scientific Research
- National Cheng Kung University
- National Science and Technology Council