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Recycling of disks by liquid caustics

IP.com Disclosure Number: IPCOM000018952D
Original Publication Date: 2003-Aug-22
Included in the Prior Art Database: 2003-Aug-22

Publishing Venue

IBM

Abstract

Aggressive caustics like hydrochloric acid affect the composition and the surface of the glass substrate of a hard disk. So it is necessary to do further treatments on the glass substrate before it can be reused in the disk manufacturing (e,g. removal of some micrometers of glass material). This makes the recycling process more expensive and reduces the number of times the glass substrate can be recycled.