Another advantage of polymer, and especially of silicone, is its flexibility, since space is often limited. Like other flexible electronics, a flexible waveguide material lets the connections be folded and wrapped around to fit the form factor. It also makes cutting and drilling the material possible without chipping it.
The Dow/IBM silicone material has losses as low as 0.03 dB/cm, which could enable links of greater than 1m. That means a link of this material could not only connect chips on the same board, but also connect two chips on different daughter cards across a backplane. It proved to be stable for more than 2,000 hours exposed to the standard test of 85C operating temperatures and 85 percent humidity, as well as during lead-free solder reflow tests of 260C.
Although the engineers now are designing boards for supercomputers and high-speed networking equipment, the same issues will eventually, and inevitably, migrate down to PCs. Polymer optical waveguides may be first placed outside the rigid PC board. But once they're accepted as a reliable technology in the field, the ultimate vision is integrating them within the rigid board, said Jones.
"Because of very high connection density and the ability to fabricate in-plane crossovers with optical waveguides, not possible with copper, you can replace several copper layers with one optical layer while increasing the performance of the system and adding value to the PC board," said Jones. "If you could replace six layers of a 16-layer board with one optical layer, the copper element of the board could come down in cost by a factor of four or five."
Thanks, Chuck. Looks to me like some patient, careful R&D on the part of two big companies that know how to do patient, careful R&D and have the deep pockets for it. Plus how to come up with a practical solution that addresses all the challenges. I don't see that very often.
I agree Charles - we have been hearing of this technology for years - transmitting light to carry data in computers. It's nice to see someone is working on a solution and it is starting to become something that may be marketable in the near future...
Ann, there is no doubt that light can carry more information at a higher speed. Moreover, I think signal losses are also very less and what about the cost factor when compare with the conventional method of data transfer.
A tiny humanoid robot has safely piloted a small plane all the way from cold start to takeoff, landing and coming to a full stop on the plane's designated runway. Yes, it happened in a pilot training simulation -- but the research team isn't far away from doing it in the real world.
Some in the US have welcomed 3D printing for boosting local economies and bringing some offshored manufacturing back onshore. Meanwhile, China is wielding its power of numbers, and its very different relationships between government, education, and industry, to kickstart a homegrown industry.
You can find out practically everything you need to know about engineering plastics as alternatives to other materials at the 2014 IAPD Plastics Expo. Admission is free for engineers, designers, specifiers, and OEMs, as well as students and faculty.
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