Dual-layered Blu-ray disc ROM fabricated by all-spin method

Hisada, Kazuya; Hayashi, K.; Nishikiori, Keiji; Ohno, Eiji

doi:10.1117/12.567977

Cited by 2 publications

(4 citation statements)

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“…To solve the cost issue of BD media, the authors developed the All Spin Method, in which all the transparent layers, (the space layer, the cover layer, and the hard coat) are made of inexpensive UV resin. 4) The key points of the All Spin Method are as follows.…”

Section: The Replication Processmentioning

confidence: 99%

“…In this way, the problem of lack of UV resin in the inner area is solved and the thickness of the cover becomes very uniform over the whole disc area. 4,7) The other problem is the spin cure method. Swelling of UV resin at the outer edge of the disc is caused when the rotation of the disc is stopped.…”

Section: Fabrication Of Cover Layer and Hard Coatmentioning

confidence: 99%

“…The authors have proposed the ''All Spin Method'' by which all the transparent layers, (the space layer, the cover layer, and the hard coat) are made of inexpensive UV resin to realize low cost dual-layer BD read-only memory (BD-ROM) media at prices comparable to those of conventional DVDs. 4) As the next step, we developed a test line for BD-ROM mass production based on the All Spin Method, and have investigated the mass-productivity of dual-layer BD-ROM media. In this paper, we describe the test line and the characteristics of the dual-layer BD-ROM media made by the line, and describe the results of feasibility tests of mass production using the All Spin Method.…”

Section: Introductionmentioning

confidence: 99%

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Manufacturing Process for Low Cost Dual Layer Blu-ray Disc Read-Only Memory Media Based on the “All Spin Method”

Ohno

Hisada

Ito

et al. 2008

jjap

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To achieve low-cost Blu-ray disc (BD) media, a test line for dual layer media based on the “All Spin Method”, which we have previously proposed, was fabricated. All transparent layers (the space layer, the cover layer, and the hard coat) were made of inexpensive UV resin by spin coating. Dual-layer BD read-only memory (BD-ROM) media were manufactured with a cycle time of 4 s, and the characteristics of the media were observed. The results indicated that (1) the variation in total thickness of the transparent layers was within ±2 µm; (2) tilt properties after sudden environmental change and storage at high temperatures were good; (3) reproduced signals showed good jitter values and symbol error rate (SER); (4) reproduced signals were not degraded even after a storage test of 200 h at 80 °C and 85% relative humidity (RH). We have thus confirmed that the manufacturing line employing the All Spin Method has potential for mass production of low cost BD media. The All Spin Method is adaptable not only to the manufacture of BD-ROM but also BD-R (recordable) and BD-RE (rewritable), so it can contribute to decreasing the costs of all types of BD media.

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Section: The Replication Processmentioning

confidence: 99%

Section: Fabrication Of Cover Layer and Hard Coatmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Manufacturing Process for Low Cost Dual Layer Blu-ray Disc Read-Only Memory Media Based on the “All Spin Method”

Ohno

Hisada

Ito

et al. 2008

jjap

Self Cite

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show abstract

“…3 The spin coating method is a promising method due to some advantages, such as a good adhesive strength and lower processing cost. 4,5 Compared to the DVD, because of the short working distance between the objective lens and the disc surface, there is a risk of mechanical contact. And BD media have an asymmetric structure consisting of a 1.1mm substrate and a 0.1mm cover layer, which may cause tilt changes when they are kept in long term storage.…”

Section: Introductionmentioning

confidence: 99%