Blu 7 inch smartphone
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Blu 7 inch smartphone.BLU Products – Phone Reviews – CNET
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Conductive plastic will allow electronic circuits to be applied with a spray gun
As the semiconductor industry moves towards the quantum limits of the size of the cells of logic elements, more and more publications appear about new materials that can replace the silicon and germanium we are used to, but not with exotic substances (such as, for example, gallium arsenides and nitrides), but inexpensive and publicly available materials.
As recently as yesterday, a publication appeared on the pages of our site about the creation by the Japanese company SEL of a microprocessor on a flexible plastic substrate. Today we have received information about a similar development of the North American TDA Research, carried out with the support of the NSF (National Science Foundation). A plastic developed by the company, Oligotron, is capable of conducting electric current, and under the influence of special conditions can be used to apply complex patterns – the equivalents of integrated circuits. Thus, the cry thrown three years ago “Plastic instead of silicon!”Seems to have found a decent response. The creators already predict about the same future for a new material: disposable electronic newspapers or displays applied directly to the wall with a spray gun.
One of the main properties of Oligotron is its resistance to the corrosive effects of water present in the atmosphere. For example, for the production of OLED displays, a conductive polymer polyethylene dioxythiophene (Pedot) is used, which is soluble in water, which is why such displays have to be covered with a protective layer, and during production, inorganic parts of devices are subject to the risk of corrosion. The Oligotron polymer contains, in addition to the Pedot conductive base, two non-conductive molecules in each link of the polymer chain, which made it insoluble in water and made it possible to fine-tune the polymer properties by attaching other compounds to them. Oligotron can be dissolved in acetone, propylene carbonate and nitromethane.
The second important property of Oligotron is that the material loses its ability to dissolve after UV treatment. Therefore, in particular, when a pattern of arbitrary complexity is applied to a solid or flexible substrate, coated with a polymer and treated with ultraviolet radiation through a mask, the desired pattern will remain on the substrate, indelible neither with water nor with acetone.
Oligotron is currently in beta testing and available to research organizations. TDA Research is working on an analysis of the applicability of Oligotron in the production of organic displays.