CD Mastering, Glass Mastering and CD Replication
Glass mastering is the most crucial and complicated part of CD replication, requiring technology and skill. Glass mastering is the first stage needed to create a stamper from the source audio or CD-ROM data and comprises the following stages:
GLASS MASTER PREPARATION
Glass Master Preparation of the 240 cm diameter 6mm thick glass master starts by stripping the old photo resist from its surface (since Master Surface Analyser the glass blanks can be recycled). This is followed by cleaning and final washing using de-ionised water. The blank glass master is then dried carefully ready for the Glass Mastering. next stage. The surface of the clean glass master is coated with a primer and then a photo resist layer 140 to 150 microns thick by spin coating. The thickness should be matched to the moulding cycle time. Shorter cycle times imply a thicker resist layer to ensure good pit geometry. The uniformity of the layer is measured with an infra red laser.
CD mastering and DVD mastering is a complex process carried out in a class 1,000 clean room. Operators wear special clothing including face masks and footwear to minimize particles that could affect the quality of stampers and therefore of pressed discs. There are differences when mastering DVDs compared with CDs, mainly due to the smaller geometries and tighter specifications. The photo resist coated glass master is then baked at about 80º C for 30 minutes. This hardens the photo resist layer ready for exposing by laser light. CD mastering is a very complex process, and VE Associates' experience is paramount when it comes to delivering quality CD mastering projects.
Our CD mastering is done in-house
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Input media by CD type
CD-ROM (Yellow Book)
CD Audio (Red Book)
CD-Enhanced (Blue Book)
3" Mini Round
Dual Layered CD/DVD (CD on one side, and a DVD-5 on the other!)
For more information on our CD services, click on one of the links below:
CD Face Imprint