Verbatim 8cm DVD - Manual (Page 9)

Achieving Double Layer recording meant
the creation of a new substrate layer that
sits in between each recording layer that
was refl ective enough to ‘bounce’ the
laser beam back when recording to layer
0, but also transparent enough to let the
laser beam through to record to layer 1.
This achievement means
uninterrupted recording up to
55 minutes on an 8cm disc.
Double Layer Technologies
Label
Polycarbonate Substrate
Refl ective Layer
Recording
Layer 1
Spacer
Layer
Laser
Recording Layer 0
Polycarbonate
Substrate
Semi Transparent
Refl ective Layer