Completely Erasable Phase Change Optical Disk

Iwasaki, H.; Ide, Yukio; Harigaya, Makoto; Kageyama, Yoshiyuki; Fujimura, Itaru

doi:10.1143/jjap.31.461

Cited by 106 publications

(50 citation statements)

References 6 publications

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“…From one point of view, tellurium is unwanted admixture in silver and has to be removed during refining process [1]. From the other, quaternary Ag-In-Sb-Te system is widely used for making phase-change discs such as compact disc rewritable (CD-RW) and rewritable digital versatile disc (DVD+RW) [2,3]. Binary Ag-Te system is also very important in mineralogy because the knowledge of the phases stability may be useful in the interpretation of the formation of ore deposits [4].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic assessment of the Ag–Te binary system

Gierlotka

2009

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Thermodynamic assessment of the Ag–Te binary system

Gierlotka

2009

Journal of Alloys and Compounds

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“…Here we demonstrate that phase change materials (PCMs) [12][13][14][15][16][17][18][19][20][21], which are renowned to switch reporducibly between an amorphous and a crystalline phase, are very promising candidates to achieve a significant force contrast without a change of composition. These materials are already used in rewriteable optical data storage [13,14,[23][24][25], where the pronounced optical contrast between the amorphous and crystalline 3 state is employed to store information.…”

mentioning

confidence: 99%

Switching Casimir forces with phase-change materials

et al. 2010

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We demonstrate here a controllable variation in the Casimir force. Changes in the force of up to 20% at separations of ~100 nm between Au and AgInSbTe (AIST) surfaces were achieved upon crystallization of an amorphous sample of AIST. This material is well known for its structural transformation, which produces a significant change in the optical properties and is exploited in optical data storage systems. The finding paves the way to the control of forces in nanosystems, such as micro-or nanoswitches by stimulating the phase change transition via localized heat sources.Pacs numbers: 78.68.+m, 03.70.+k, 85.85.+j, 12.20.Fv 2 Casimir forces [1][2][3][4][5][6][7][8] arise between two surfaces due to the quantum zero-point energy of the electromagnetic field. The surfaces restrict the allowed wavelengths and thus the number of field modes within the cavity, which locally depresses the zero point energy of the electromagnetic field. The reduction depends on the separation between the plates thus there is a force between them, which for normal materials is always attractive [1].The zero point energy manifests itself as quantum fluctuations, which in the small separation limit give rise to the familiar van der Waals force. The original calculation of the Casimir force assumed two parallel plates with an infinite conductivity [1]. This was later modified to include the dielectric properties of real materials and the intervening medium [2,3], providing the first glimpse of possible methods to control the magnitude and even the direction of the force. This finding has motivated our attempts to manipulate the dielectric properties of a material and hence generate force contrast [9][10][11]. A particularly exciting possibility is to produce a 'switchable' force by employing materials whose optical properties can be changed in situ in response to a simple stimulus [9,10].So far the only significant contrast that has been demonstrated is only between different materials [11]. To obtain a large Casimir force contrast for a single material requires a large modification of its dielectric response, which has not been achieved in materials used up to now.Here we demonstrate that phase change materials (PCMs) [12][13][14][15][16][17][18][19][20][21], which are renowned to switch reporducibly between an amorphous and a crystalline phase, are very promising candidates to achieve a significant force contrast without a change of composition. These materials are already used in rewriteable optical data storage [13,14,[23][24][25], where the pronounced optical contrast between the amorphous and crystalline 3 state is employed to store information. This storage principle employs a focussed laser beam to locally heat a disk with a thin film of phase change material. Upon a variation of the power and length of the laser pulse the material can be reversibly switched between the amorphous and the crystalline phase many times. Here we will show that the pronounced contrast of optical properties enables a significant change of the Casimi...

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“…These layers are above the substrate ( Figure 4) and are affected by a laser [7][8][9][10][11][12][13][14][15] . Figure 5 depicts the operational principles involved in phase change overwriting.…”

Section: Phase Change Overwriting Effects On Cd-rwsmentioning

confidence: 99%

“…Life testing of CD-RWs is very important in confirming that design standards are met. The phase change overwriting principle has been applied to the functioning and manufacturing of CD-RWs for saving data [7][8][9][10][11][12][13][14][15] . CD-RWs are recorded or erased through phase changing technology, associated with the material changing reflective ratio.…”

Section: Introductionmentioning

confidence: 99%

Determining the lifetime of CD‐RWs using efficient sampling on a production line

Chen¹

2003

Quality & Reliability Eng

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This work derives the intermittent batch size and sample size for product life testing on a production line. The sequential probability ratio test was adopted to determine the sample size, n, and the expected number of samples (ENS). An inverse chi-square approximation was used to determine the relationship between the degree of freedom, m − 1, and the estimated range of σ 2 (ER σ 2 ) at various (1 − α) levels of confidence. Consequently, ENS and m were used to determine the intermittent batch size, l. Finally, rewritable compact disks (CD-RWs) underwent testing to demonstrate the feasibility and effectiveness of the proposed efficient sampling approach. Copyright

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Completely Erasable Phase Change Optical Disk

Cited by 106 publications

References 6 publications

Thermodynamic assessment of the Ag–Te binary system

Thermodynamic assessment of the Ag–Te binary system

Switching Casimir forces with phase-change materials

Determining the lifetime of CD‐RWs using efficient sampling on a production line

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