But the design requires that this silicon layer be no more than five nanometres (billionths of a metre) deep.

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They said the design did not take that weak layer into account.

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Design for Internet companies is often thought of as just a top layer of pretty paint, but Facebook and other start-ups are integrating design as an integral part of their overall strategy.

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And then layer on top of that tremendous amounts of design support services.

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Packet Design's engineers plan to infuse new software into this layer of the network in six months.

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These printers use something like a toothpaste tube of plastic or other material held vertically in an X-Y plotter that squirts out thin layers of tiny dots of material that build up, layer by layer, to produce a 3D replica of the computer-generated design.

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This design doubles the recording storage capacity (to 100GB) compared to existing dual-layer discs (50GB).

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