An apparatus for manufacturing a substrate of an optical recording disk having a transfer layer of uniform thickness. The apparatus forcibly deforms a portion of the substrate ranging from the center portion to an outer circumferential portion so as to provide a substantially conical-convex shape prior...http://www.google.fr/patents/US5417182?utm_source=gb-gplus-shareBrevet US5417182 - Apparatus for manufacturing a substrate means for an optical recording disk
Apparatus for manufacturing a substrate means for an optical recording disk
