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The BD-ROM Disc Production Process

Panasonic manufactures BD-ROM Discs at its Panasonic Disc Manufacturing Corporation of America (PDMC) facilities in Torrance, California, U.S.A.

The production processes for the single-layer and dual-layer BD-ROM Discs produced using Panasonic's originally developed Spin Coating method are presented here.

Single-Layer BD-ROM (25GB)Dual-Layer BD-ROM (50GB)

Molding
First, a substrate with a thickness of 1.1 mm is produced.


Sputtering (Forming a recorded layer: L0 recorded layer.)
The thickness is then unified at high speed, with nanometer precision.


Formation of the 2nd Layer
Separate from the substrate, a resin stamper is produced.

The space layer is formed using the spin coating method, which uniformly applies a 25-micron layer of UV resin.

This is bonded to the L0 recorded layer.
Then, the resin stamper is separated.
Sputtering (Forming a new recorded layer: L1 recorded layer.)

Spin Coat(Cover Layer Formation)
The spin coating method applies a film with high uniformity from the center of the disc to the outer edge.
Click to see animated images of the spin coating method (A new window will open.)


Spin Coat（Hard Coat）
A 2-micron-thick film is formed by the spin coating method.

Inspection
After it is inspected for quality, the BD-ROM Disc is completed.
 Single-Layer BD-ROM (25GB) Dual-Layer BD-ROM (50GB)

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