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NEW BURNISH HEAD TECHNOLOGY

IP.com Disclosure Number: IPCOM000021343D
Original Publication Date: 2004-Jan-16
Included in the Prior Art Database: 2004-Jan-16

Publishing Venue

IBM

Abstract

Burnish is a necessary but very critical process step used for media finishing technology. Burnish is being used to eliminate contamination as well as tiny asperities on the disk surface of the finished media. Cross over from non-critical to critical burnish is pretty small. Critical (aggressive) burnish does have the high probability to create debris, which could cause later on head fly ability and reliability problems. The burnish head is kind of touching the disk surface. In case of "bad" edges on head level the burnish head also could cause surface damages like scratches etc.. An extended study, see below, has shown, that the edges of the burnish head should be improved and optimized due to 5-waviness and smooth surface roughness requirements. The study also showed, that the modified heads (edge blend) increased Yield by two digits at least.