Vacuum Tubes to Silicon and beyond<br />Faridi Qaium<br />Computer Science<br />
Vacuum Tube<br />Source: www.computermuseum.li<br />
Replacement for Vacuum tubes<br />Gallium arsenide<br />Silicon<br />Very powerful<br />Large energy gap<br />Has capabili...
Moore’s law<br />Source: www.intel.com<br />
Requirements to replace silicon<br />Economical<br />Durable<br />Potential<br />
3D memory<br /><ul><li>Stacks layers of transistors on top of each other
Carbon nanotubes are inserted to control a group of transistor
Implemented today</li></ul>Source: http://news.soft32.com/wp-content/upload/SamsungWSP.jpg<br />
Gallium arsenide (GaAs)<br />Used in numerous electronics today<br />Does not react to extreme temperatures<br />Large ban...
Gallium Nitride (GaN)<br /><ul><li> Band gap size twice the size of silicon and GaAs
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Vacuum Tubes to Silicon and beyond

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  • Used in the first computer—EniacTook up lot of spaceGenerated lot of heat (Cathode ray tube) -- Heat cause it to deteriorate easily -- Frequent replacementUsed as transistor Transistor is a switch with no moving part two states, ON or OFF
  • GaAs-- Eventually, used in TV, Microwave and otherSilicon was chosen due to the fact it was cheaper and abundantly available
  • States that the number of transistors on an integrated circuit doubles about every two year--this helped up invent innovative technology--make things fasterPossibilities of silicon are over exhaustedNot a suitable choice for mobile devices
  • Reduces the number of control gates --reduces the size of the transistorDone with silicon todayGenerates heatMemory leak since they are packed togetherEmma and kursun – researchers @ ibm said its only and extension of moore’s law
  • Researcher at the Department of defense is researching with GaAsGenerates a lot of Heat, therefore a good choice for solar panelsUsed in solar panels, cell phone towers, TV, microwaves and satelites
  • Umesh K. Mishra researcher at UC santabarbara created a GaN transistor -- in the process he realized the larger band gaps allows for faster data transfer -- large critical breakdown field indicates that it is durable -- having a low thermal means it produces less heat than silicon
  • No bandgap allows electrons in graphene to roam freely -- also a bad thing because they will require an external device to control the elctronsGraphite is used in pencil initially from carbonRequires a high quality of graphiteDCT process -- graphene is pressed onto silicon -- increases the footprint of the transistor because graphene is so thin
  • Vacuum Tubes to Silicon and beyond

    1. 1. Vacuum Tubes to Silicon and beyond<br />Faridi Qaium<br />Computer Science<br />
    2. 2. Vacuum Tube<br />Source: www.computermuseum.li<br />
    3. 3. Replacement for Vacuum tubes<br />Gallium arsenide<br />Silicon<br />Very powerful<br />Large energy gap<br />Has capability of transmitting light<br />Does not react to extreme temperature condition<br />Made from sand<br />Strong and durable<br />Cost effective<br />
    4. 4. Moore’s law<br />Source: www.intel.com<br />
    5. 5. Requirements to replace silicon<br />Economical<br />Durable<br />Potential<br />
    6. 6. 3D memory<br /><ul><li>Stacks layers of transistors on top of each other
    7. 7. Carbon nanotubes are inserted to control a group of transistor
    8. 8. Implemented today</li></ul>Source: http://news.soft32.com/wp-content/upload/SamsungWSP.jpg<br />
    9. 9. Gallium arsenide (GaAs)<br />Used in numerous electronics today<br />Does not react to extreme temperatures<br />Large band gap<br />Allows for light transmission<br />Expensive<br />Source: http://www.tgisolargroup.com/images/image007.jpg<br />
    10. 10. Gallium Nitride (GaN)<br /><ul><li> Band gap size twice the size of silicon and GaAs
    11. 11. Does not generate a lot of heat
    12. 12. Critical breakdown field 3.0
    13. 13. Expensive</li></li></ul><li>Graphene<br />Made from graphite<br />No bandgap<br />Memory leak<br />No mass production technique yet<br />Hard to manufacture<br />
    14. 14. Research design<br />Create a wafer of Graphene transistors<br />Stack them on top of each other<br />Insert carbon nanotubes as a method of control structure<br />Carefully chose an algorithm to control these gates<br />Finally test the chip by using it in a live system and compare the performance against its silicon counter part<br />
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