Hitachi develops long-term data archival method using glass slivers

Hitachi logoHitachi has developed a method of writing and reading digital information on slivers of quartz glass, offering a reliable way to safely store data, almost for ever.

Hitachi's new technology uses a laser to store data in binary form by creating dots inside a thin sheet of quartz glass, which can be read with an ordinary optical microscope. Data can be stored in many layers inside the quartz glass, by changing the focus point of the laser - a technique also met in multi-layered recordable optical discs.

The laser used for data recording is emitting ultrashort pulses of light, electromagnetic pulses whose time duration is of the order of a femtosecond. Hitachi has also developed a recording technology that uses a spatial phase modulator, which modulates both the phase and the amplitude of the laser beam. This results to a higher recording of up to 100 dots at a time, Hitachi said.

Reading of the stored data is achieved by using an ordinary optical microscope. By applying signal processing techniques to the read-out signal, Hitachi's researchers have achieved an error-free reading with a reproduction SNR of just 15dB.

The prototype storage device is two centimetres square and just two millimetres thick. It is resistant to many chemicals and unaffected by radio waves, can be exposed directly to high temperature flames and heated to 1,000 degrees Celsius for at least two hours without being damaged. It is also waterproof, meaning it could eventually store data for hundrends of years.

The material currently has four layers of dots, which can hold 40 MB per square inch, approximately the density on a music CD (35MB). More layers can be also added to future prototypes.

Hitachi have not decided when to put the chip to practical use.

The company will present a related paper at this year's International Symposium on Optical Memory (ISOM2012,) which willbe held in Tokyo, Japan, in September 30, 2012.

Source: CDRinfo

Tags: Hitachi, technologies

Comments
Add comment

Your name:
Sign in with:
or
Your comment:


Enter code:

E-mail (not required)
E-mail will not be disclosed to the third party


Last news

 
Galaxy Note10 really is built around a 6.7-inch display
 
You may still be able to download your content
 
Facebook, Messenger and Instagram are all going away
 
Minimize apps to a floating, always-on-top bubble
 
Japan Display has been providing LCDs for the iPhone XR, the only LCD model in Apple’s 2018 line-up
 
The 2001 operating system has reached its lowest share level
 
The entire TSMC 5nm design infrastructure is available now from TSMC
 
The smartphone uses a Snapdragon 660 processor running Android 9 Pie
The Samsung Galaxy A5 (2017) Review
The evolution of the successful smartphone, now with a waterproof body and USB Type-C
February 7, 2017 / 1
Samsung Galaxy TabPro S - a tablet with the Windows-keyboard
The first Windows-tablet with the 12-inch display Super AMOLED
June 7, 2016 /
Keyboards for iOS
Ten iOS keyboards review
July 18, 2015 /
Samsung E1200 Mobile Phone Review
A cheap phone with a good screen
March 8, 2015 / 4
Creative Sound Blaster Z sound card review
Good sound for those who are not satisfied with the onboard solution
September 25, 2014 / 2
Samsung Galaxy Gear: Smartwatch at High Price
The first smartwatch from Samsung - almost a smartphone with a small body
December 19, 2013 /
 
 

News Archive

 
 
SuMoTuWeThFrSa
      1
2345678
9101112131415
16171819202122
23242526272829
30      




Poll

Do you use microSD card with your phone?
or leave your own version in comments (15)