Polymers as substrates and media for data storage

Kaempf, G.; Loewer, H.; Witman, M. W.

doi:10.1002/pen.760271902

Cited by 24 publications

(6 citation statements)

References 29 publications

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“…Extremely high storage density, very compact drives, and the absence of physical contact between heads and media are among the main advantages of this technology over competing technologies such as magnetics. The use of plastic substrates in optical memory disks has enabled this technology to make strong inroads into the high-volume consumer markets, as exemplified by the commercial and technological success of the audio compact disk and the laser videodisk (e.g., Kirkland, 1986;Kaempf et al, 1987). In light of this success many new optical storage systems have been designed around a rigid plastic substrate.…”

Section: Introductionmentioning

confidence: 99%

“…In general, low birefringence can be attained either through use of materials with low intrinsic optical anisotropy or through judicious manipulation of the injection-molding process-the most widely used process for producing plastic substrates (Kirkland, 1986). To date, the latter option appears to be more viable since very few materials with low intrinsic anisotropy that are suitable for optical disk applications have so far been developed on a commercial scale (Kato et al, 1986;Kaempf et al, 1987). However, since.…”

Section: Introductionmentioning

confidence: 99%

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The birefringence problem in optical disk substrates: A modeling approach

1989

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An analytical model has been constructed t o predict the birefringence level in an injuection-molded disk with direct application to optical disk substrates. The model incorporates simplified analyses for the flow in a center-gated cavity during the filling stage, the heat transfer during the cooling stage, and the stress relaxation following the cessation of flow at the end of the filling stage of the injection-molding cycle. The stress relaxation process is analyzed with the integral constitutive equation of Wagner and the residual stresses are converted to retardation via the stress-optical law. Predictions of normal retardation profiles are in line with experimental data and the general effects of melt temperature, mold temperature, and injection speed are closely captured by the model. By contrast, the observed transverse retardation is not in accord with the predicted response. This discrepancy is attributed to the fact that the transverse retardation is induced by cooling stresses and thus cannot be explained in terms of a flow stress mechanism employed in the present analysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The birefringence problem in optical disk substrates: A modeling approach

1989

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“…Data storage in DNA is a technology of "storing information in polymers" which can be dated back to the 1980s when Kaempf et al (1987) proposed the concept. This technology was termed as "molecular data storage" in later studies and has been an active and challenging area since then (Boukis and Meier, 2018;Martens et al, 2018;Ceze et al, 2019;Meier and Barner-Kowollik, 2019).…”

Section: Dense and Long-term Data Storage In Dnamentioning

confidence: 99%

Large-Scale de novo Oligonucleotide Synthesis for Whole-Genome Synthesis and Data Storage: Challenges and Opportunities

Song

Deng²,

Gong³

et al. 2021

Front. Bioeng. Biotechnol.

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Over the past decades, remarkable progress on phosphoramidite chemistry-based large-scale de novo oligonucleotide synthesis has been achieved, enabling numerous novel and exciting applications. Among them, de novo genome synthesis and DNA data storage are striking. However, to make these two applications more practical, the synthesis length, speed, cost, and throughput require vast improvements, which is a challenge to be met by the phosphoramidite chemistry. Harnessing the power of enzymes, the recently emerged enzymatic methods provide a competitive route to overcome this challenge. In this review, we first summarize the status of large-scale oligonucleotide synthesis technologies including the basic methodology and large-scale synthesis approaches, with special focus on the emerging enzymatic methods. Afterward, we discuss the opportunities and challenges of large-scale oligonucleotide synthesis on de novo genome synthesis and DNA data storage respectively.

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“…The composition by volume is about 40% magnetic material, 40% polymers, and 20% minute pores (responsible for noise), which are necessary to prevent adhesion of the tape surface to the recording head of any playback equipment. (A) The polymeric base film, which provides the mechanical properties and is responsible for the physical integrity of the tape, is a polymeric material that has been of different nature during the time [20], as shown in Figures 4-7.…”

Section: Composition Of Magnetic Tapes For Audio Data Storagementioning

confidence: 99%

“…Scott Dorsey, who works at NASA as an instrumentation support technician, suggested using D5 or decamethylcyclopentasiloxane as a lubricant 20 . It evaporates relatively quickly so even if a tape mechanism is contaminated, it will return to normal working order in a few days.…”

Section: Adding More Lubricantmentioning

confidence: 99%

Chemistry for Audio Heritage Preservation: A Review of Analytical Techniques for Audio Magnetic Tapes

Bressan

Hess²,

Sgarbossa

et al. 2019

Heritage

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Vast and important cultural resources are entrusted to magnetic tape around the world, but they are susceptible to degradation, which may lead to severe replay problems. Audio magnetic tapes are complex and multicomponent devices containing organic compounds and metal systems, which can be potential catalysts for many degradative reactions in the presence of water, light, or heating. The aim of this review is to collect the literature concerning the analytical determinations and instrumental approaches that can achieve the chemical identification of the components in the tape and the degradation state. Thus, a combination of destructive (such as acetone extraction) and non-destructive techniques (such as ATR FTIR spectroscopy) have been proposed, together with SEM, ESEM, XRD and TGA analyses to assess the chemical and physical characterization of the tape with the purpose to individualize restoration treatments and optimize conditions for preservation. The impact of the studies reviewed in this paper may go beyond audio, being potentially relevant to video, data, instrumentation, and logging tapes.

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Polymers as substrates and media for data storage

Cited by 24 publications

References 29 publications

The birefringence problem in optical disk substrates: A modeling approach

The birefringence problem in optical disk substrates: A modeling approach

Large-Scale de novo Oligonucleotide Synthesis for Whole-Genome Synthesis and Data Storage: Challenges and Opportunities

Chemistry for Audio Heritage Preservation: A Review of Analytical Techniques for Audio Magnetic Tapes

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