*08/11/2014 through 9/2/2013
Thermoset polyimides for microelectronic applications
Polymer composition for microelectronic assembly
Implantable micro-electromechanical system sensor
U.S. Patent 8,536,075 (September 17, 2013), “Electronic Systems Incorporated into Textile Threads or Fibres,” Philip Noel Leonard (Chepstow, Great Britain).
The use of mobile personal computer systems and personal (mobile) telephones is well established and chnging. Efforts are to make these devices smaller, more convenient and theft proof. Leonard used textile threads or fibers to encapsulate active electronic elements. Several elements can be electrically connected along the length of a single fiber. These fibers can, in turn, be woven and and the fibers with their components electrically connected so the elements interact to form an electronic device. The basic elements can be optical, molecular, sub-molecular or DNA strand of biological or non-biological origin. In theory the device can be a computer, a telephone, a television, a radio or another electronic device.
“Microelectronics is a subfield of electronics. As the name suggests, microelectronics relates to the study and manufacture (or microfabrication) of very small electronic designs and components. Usually, but not always, this means micrometre-scale or smaller. These devices are made from semiconductor materials. Many components of normal electronic design are available in a microelectronic equivalent. These include transistors, capacitors, inductors, resistors, diodes and (naturally) insulators and conductors can all be found in microelectronic devices. Unique wiring techniques such as wire bonding are also often used in microelectronics because of the unusually small size of the components, leads and pads. This technique requires specialized equipment and is expensive.
Digital integrated circuits (ICs) consist mostly of transistors. Analog circuits commonly contain resistors and capacitors as well. Inductors are used in some high frequency analog circuits, but tend to occupy large chip area if used at low frequencies; gyrators can replace them in many applications.
As techniques improve, the scale of microelectronic components continues to decrease. At smaller scales, the relative impact of intrinsic circuit properties such as interconnections may become more significant. These are called parasitic effects, and the goal of the microelectronics design engineer is to find ways to compensate for or to minimize these effects, while always delivering smaller, faster, and cheaper devices.”
(Microelectronics, Wikipedia, 10/23/2013)
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Roger D. Corneliussen
Maro Polymer Links
Tel: 610 363 9920
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Copyright 2013 by Roger D. Corneliussen.
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* Date of latest addition; date of first entry is 10/8/2013.