Will 3D Printing Take Off?

The use of cheaper 3D printing is set to take off when a batch of patents expires in 2014.

Duann Scott, design evangelist at 3D printing company Shapeways said that in February 2014, key patents that currently prevent competition in the market for the most advanced and functional 3D printers will expire. The important patent is one which covers “laser sintering” which is the lowest-cost 3D printing technology. Because of its high resolution in all three dimensions, laser sintering can produce goods that can be sold as finished products.

At the moment it is only possible to buy expensive 3D laser sintering printers, which can cost tens of thousands of dollars each. But once the key patents on 3D printing via laser sintering expire, we could see huge drop in the price of these devices, says Scott.

Key patents expired on a more primitive form of 3D printing, known as fused deposition modelling resulted in an explosion of open-source FDM printers that eventually led to iconic home and hobbyist 3D printer manufacturer Makerbot. When the patents on FDM expired the cost of such printers fell as little as $300. Scott thinks that the same thing will happen with laser deposition 3D printers.

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Spray-On Battery Coming To The Office

Researchers at Rice University in Houston have created a prototype spray-on battery that could allow engineers to rethink the way portable electronics are developed.

The rechargeable battery boasts similar electrical characteristics to the lithium ion batteries that power almost every mobile gadget, but it can be applied in layers to almost any surface with a conventional airbrush, said Neelam Singh, a Rice University graduate student who led a team working on the technology for more than a year.

Current lithium ion batteries are almost all variations on the same basic form: an inflexible block with electrodes at one end. Because they cannot easily be shaped, they sometimes restrict designers, particularly when it comes to small gadgets with curved surfaces, but the Rice prototypes could change that.

“Today, we only have a few form factors of batteries, but this battery can be fabricated to fill the space available,” said Singh.

The battery is sprayed on in five layers: two current collectors sandwich a cathode, a polymer separator and an anode.

“It was difficult optimizing the components in the form of a paint,” said Singh. Initial versions were sensitive to moisture and would peel off, but the addition of a polymer and a heat-sealing step solved this problem.

The result is a battery that can be sprayed on to plastics, metal and ceramics.

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