The process of recording information, and especially the process of erasing the optical drives - drives a long time the information was not in the focus of attention of researchers and developers

Since 1961, the principle of Landauer considered purely theoretical and there is nothing forcing researchers to move in the direction of technological development in the operational phase;

Physicists have demonstrated for the first time in practice, the so-called principle of Landauer. The article appeared in the scientific journal Nature.

Landauer principle was formulated at that time worked at IBM by Rolf Landauer in 1961.

This principle states that, regardless of the technical implementation of a computer system, erasing one bit of information is allocated no less than some fixed amount of heat. In fact, the work required to clear, is proportional to the thermodynamic entropy of the system.

As part of the scientists have a very simple model a bit. To do this, they put the silicon in the colloid particle in a potential well with a laser beam. Located next to another pit.

Moving a particle from one well to another in line with changes in the state of the bit.
According to scientists, as a result of the experiment they were able to approach the theoretical limit, described by Landauer.

The quantity of heat, with a slowing of the process erasing first declined, but near the limit of almost remained unchanged.

In June 2011 an article appeared in Nature, the authors of which from a theoretical point of view considered the Landauer principle for quantum computers. As a result, they were able to establish that the presence of quantum entanglement does not affect the principle, with the only difference being that the work is already proportional to the conditional entropy (the quantum analogue of classical entropy).

At the same time showed an unexpected effect - due to the fact that the conditional entropy can be negative, the work in the performance of certain operations may be provided less than zero. As a result, the computer at work will not be heated and cooled

Of course in real-world computer designs have long viewed the problem of the local thermal instability with increasing speed write and erase information

In this paper, the authors set out to acquaint the readers and users of the site Yaroslav Vashchuk with the best inventions in the field of improving the thermal stability of computers in conjunction with other goals improve the overall efficiency of computing nodes, connected with the optical memory

Particularly interesting in this regard, the following invention, the result of the work and co-inventors of the three countries - Japan, U.S. and Israel

United States Patent Application 20090245066
Kind Code A1
Katsuura; Kanji ; et al. October 1, 2009
________________________________________
OPTICAL DATA CARRIER, AND METHOD FOR READING/RECORDING DATA THEREIN
Abstract
An optical data carrier is presented. The data carrier comprises: at least one recording layer composed of a material having a fluorescent property variable on occurrence of multi-photon absorption resulting from an optical beam, said recording layer having a thickness for forming a plurality of recording planes therein; at least one non-recording layer formed on at least one of upper and lower surfaces of said recording layer and differing in fluorescent property from said recording layer; and at least one reference layer having a reflecting surface being an interface between the recording layer and the non-recording layer.
________________________________________
Inventors: Katsuura; Kanji; (Saitama-ken, JP) ; Eitan; Ori; (Jerusalem, IL) ; Okino; Yoshihiru; (Kyoto, JP) ; Hamer; Rene; (Louisville, CO) ; Livshits; David; (Ashdod, IL)
Correspondence Address: BROWDY AND NEIMARK, P.L.L.C.;624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
Assignee: Mempile Inc.
Wilmington
DE
Serial No.: 097218
Series Code: 12
Filed: December 12, 2006
PCT Filed: December 12, 2006
PCT NO: PCT/IL06/01425

As shown by experimental work on a test version of manufacturing multilayer optical discs, the most time consuming is the process of formatting a disk

If formatting is traditionally conducted by the accepted method of formatting layers 100 required 72 hours (in one layer has a track record 37,000)

The inventors have fundamentally changed the method of formatting, making the whole process of formatting it was possible to perform in just 3 minutes

This immediately allowed to talk about the mass production of multi-layer optical disc drive memory

The following is a summary of the invention

United States Patent Application 20080285396
Kind Code A1
Salomon; Yair ; et al. November 20, 2008
________________________________________
Method and Apparatus of Formatting a Three Dimensional Optical Information Carrier
Abstract
A method of formatting at least one optical information carrier is provided. The method is aimed at creating a plurality of formatting marks that are to be sequentially addressed when reading recording information in the carrier. The method comprises recording the plurality of formatting marks within the carrier volume in an interleaved order, thereby reducing delays in recording locally adjacent formatting marks thus reducing the entire carrier formatting time.
________________________________________
Inventors: Salomon; Yair; (Jerusalem, IL) ; Alpert; Ortal; (Jerusalem, IL) ; Livshits; David; (Ashdod, IL)
Correspondence Address: BROWDY AND NEIMARK, P.L.L.C.;624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
Assignee: MemPile In.c c/o PHS Corporate Services Inc.
Wilmington
DE
Serial No.: 912277
Series Code: 11
Filed: April 20, 2006
PCT Filed: April 20, 2006
PCT NO: PCT/IL2006/000488
371 Date: August 4, 2008

Next problem arose in the implementation of the layers in the optical disc body

According to the conceptual design of the solution of the disk (and in principle can not be changed outside the geometric dimensions of the disk), the distance between the layers must be no larger than 10 microns

Began searching for technological solutions, but again, when using traditional processing methods and techniques to obtain the required accuracy has not been possible

Then the authors applied the methods of the invention, the photoresist coating on motherboards micro assembly, known for over 20 years
Instead, the photoresist used monomer of polycarbonate disc and started to build a layered method of polymerization

This immediately solved the problem and allowed to consider the mass production of multi-layer optical disc, while maintaining the required accuracy

United States Patent Application 20080182060
Kind Code A1
Livshits; David ; et al. July 31, 2008
________________________________________
Manufacturing of Multi-Plate For Improved Optical Storage
Abstract
In accordance with the invention a new optical data carrier and methods for its production are provided. The optical data carrier of the invention is characterized in that different plates have different concentrations.
________________________________________
Inventors: Livshits; David; (Ashdod, IL) ; Alpert; Ortal; (Jerusalem, IL) ; Salomon; Yair; (Jerusalem, IL)
Correspondence Address: BROWDY AND NEIMARK, P.L.L.C.;624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
Serial No.: 813837
Series Code: 11
Filed: January 12, 2006
PCT Filed: January 12, 2006
PCT NO: PCT/IL2006/000053
371 Date: July 12, 2007

In the following the invention of the inventor has completely changed the mechanism of the recording and reading device, so that the reliability and thermal stability of computers, as well as their performance in the process of reading, writing and erasing of information increased significantly

United States Patent Application 20070288947
Kind Code A1
Livshits; David December 13, 2007
________________________________________
SWING ARM OPTICAL DISC DRIVE
Abstract
Disclosed is a swing type optical disc drive. The drive includes a disc rotating on a disc support and a swing arm pivoted at one of its ends and having a distal end communicating with an encoder. The pivot point and a point on distal end define a swing axis of the arm. The disc further includes an optical system mounted on the arm such that optical axis of the system is parallel with the swing axis and both axes lie in the same plane. A cam actuator imparts a swinging motion to the arm. The swinging motion of the arm positions the plane with the optical axis and the arm axes such that the plane is always tangent to a reading/recording track of the disc.
________________________________________
Inventors: Livshits; David; (Ashdod, IL)
Correspondence Address: BROWDY AND NEIMARK, P.L.L.C.;624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
Assignee: MemPile Inc.
Wilmington
DE
19801
Serial No.: 760184
Series Code: 11
Filed: June 8, 2007

Finally, as a result of a chain of research and development - design development emerged in principle to the original three-dimensional structure of an optical disk that allows you to raise the recording density and to perform multi-disc (out of 100 tested structure of the layers in the same geometrical dimensions of the disk)

United States Patent Application 20060250934
Kind Code A1
Livshits; David ; et al. November 9, 2006
________________________________________
Three dimensional optical information carrier and a method of manufacturing thereof
Abstract
A three dimensional optical information carrier is presented. The information carrier comprises formatting marks disposed on the nodes of a three dimensional lattice formed by the intersection of equiangular spaced radial planes, equidistantly spaced cylindrical spiral tracks and virtual recording planes.
________________________________________
Inventors: Livshits; David; (Ashdod, IL) ; Salomon; Yair; (Jerusalem, IL) ; Alpert; Ortal; (Jerusalem, IL)
Correspondence Address: BROWDY AND NEIMARK, P.L.L.C.;624 NINTH STREET, NW
SUITE 300
WASHINGTON
DC
20001-5303
US
Assignee: MemPile Inc.
Wilmington
DE
Serial No.: 290818
Series Code: 11
Filed: December 1, 2005