CD Materials

By Bill

Commercial CDs

• Materials/Process:– Injection molded PC imprinted with bumps by

master stamp.– Aluminum is sputtered over bumps– Protective acrylic layers sprayed over top– Label painted on top of acrylic.

Commercial CDs

www.cdman.com

www.cd-info.com

Commercial CDs

• Mastering: process of creating a stamper to be used in the injection molding stage of manufacturing compact discs. – A laser etches the digital pattern onto a highly

polished glass disc coated with photoresist – "glass master" is then cured (developed) with

ultraviolet light and rinsed off – A metal mold is electroformed– The mold is removed and electroplated with nickel to

be used as the stamper.

Commercial CDs

• Glass mastering

www.cdman.com

Commercial CDs

• 10X

Commercial CDs

• 50X

Commercial CDs

• 75X

Commercial CDs

• 100X

Commercial CDs

• 50x: No track

CD-Rs

• Materials/Process:– Organic dye between the PC substrate and the

reflective layer– PC substrate has is etched with a pregroove

www.cdmediaworld.com

CD-Rs

• Materials/Process:– Dyes and color

Dye Material Refl: Au Refl: Ag Quality

Cyanine Green Green/blue Cheapest

PhthaloCyanine Gold - Highest

Metallized Azo - Dark blue ?

Advanced PhthaloCyanine

Gold -

Formazan Green/gold -

CDRs

• 10X: dirt

CDRs

• 100X