An in-depth study of the total process solution from grind to final polish was performed for borosilicate-crown glass and fused silica. SQUADRO-G2 grinding pad and the industrial standard fixed abrasive grinding pad were compared on a double-side tool. The surface roughness and the material removal rate were compared for the grinding step. SQUADROG2 had a comparable material removal rate for fused silica and a higher removal rate for borosilicate-crown glass. After the fine-grinding step, samples were polished with Ultra-Sol® Optiq on various polishing pads. The processes were studied by comparing removal rates, surface quality, and the amount of material removed to achieve a low surface roughness, defect free substrate post-grinding. There was no difference observed for the finishing of glass that was ground with SQUADRO-G2 grinding pad and the standard fixed abrasive grinding pad. Furthermore, we offer some compelling case studies for achieving superior surface quality in the final polish operations.
We investigate the use of an innovative fixed abrasive diamond fine grinding pad, Squadro-G, for the fine grinding of various glass types. Through continuous development of the diamond abrasive matrix, grain size and concentration, we have found significant pathways to improve the process performance of the fine grinding operation. For the various glass types used in the investigation the process performance was monitored based on materials removal rates, surface quality, run-to-run consistency and Squadro-G pad lifetime. Data shows the use of Squadro-G fixed abrasive grinding pads can enable efficient processing of various types of glass and tool configurations. Ultimate flexibility is gained via the availability of different grit sizes, dedicated pad configurations with respect to given glass types, and east mounting and dismounting.
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