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Proceedings Paper

Pulsed cooling: a method for optimising of BD substrates moulding
Author(s): Jan Bernards; Peter Simon; Thomas Moosbrugger; Wlodek Mischke
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Paper Abstract

Our investigation covers the BD ROM as well as BD RE (re-writable) substrates moulding process. We performed series of experiments investigating and optimising the moulding process for BD substrates. The relations between the mould temperature, cycle time, moulding process, cooling pulses and the physical properties of the substrates itself were investigated. Several relations are presented for dependence of the substrates physical parameters like birefringence, tangential and radial deviation, diffraction efficiency, AFM measured groove/pit geometry. It was shown that comparing to the stationary type of cooling, the Pulsed Cooling method of moulding the BD discs manufactures substrates with lower birefringence, tilt, dishing, very good groove/pit replication quality with shorter cycle time and using the lower mould temperature. Optimized moulding process conditions are indicated.

Paper Details

Date Published: 15 September 2005
PDF: 8 pages
Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59661Y (15 September 2005); doi: 10.1117/12.649813
Show Author Affiliations
Jan Bernards, Datarius Technologies GmbH (Austria)
Peter Simon, Datarius Technologies GmbH (Austria)
Thomas Moosbrugger, Datarius Technologies GmbH (Austria)
Wlodek Mischke, Datarius Technologies GmbH (Austria)


Published in SPIE Proceedings Vol. 5966:
Seventh International Symposium on Optical Storage (ISOS 2005)
Fuxi Gan; Lisong Hou, Editor(s)

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