What is BD-R (Blu-ray Disc Recordable)?
What Is BD-R?
The minimum write speed of Blu-ray Discs is 36 megabits (4.5 megabytes) per second.
The following information describes the different types of recording layers that can be used on BD-R and BD-RE discs.
In BD-RE discs, the data layers are surrounded by a pair of dielectric Zinc Sulfur-Silicon Dioxide layers.
Adhesive spacer layers and semi-reflective layers are used for multilayer discs.
The recording layers and the dielectric layers are all deposited by sputtering.
On multi-layer BD-RE discs, each GeSbTe recording layer is getting thinner and thinner.
The separation layer that separates the recording layers from each other also gradually becomes thinner.
On the contrary, the manufacturer only needs to modify the current equipment.
It is expected that this will reduce the cost of disc manufacturing.
Panasonic released firmware updates for DMR-BW200, DMR-BR100, and MR-BW900/BW800/BW700 models in November 2007.
Pioneer was expected to deliver the first batch of LTH BD drives in the spring of 2008.
Sony upgraded the PlayStation 3 firmware in March 2008 to make BD-R LTH reading possible.
The data they collected showed that the overall quality of LTH discs is worse than that of HTL discs.
