Sandisk Uses Nine-Chip Stack in Latest microSD Card

Discussion in 'General Off-Topic Chat' started by striderx, Jun 12, 2009.

  1. striderx
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    Member striderx GBAtemp Regular

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    Have you ever wondered how they cram so much memory into such a small package as a microSD card?

    When you read about microchip memory capacity the units you see used in industry reports are most bits not bytes. To get bytes you need to divide that number by 8 -- 8bits/byte. I work in the industry and have often wondered how they get 16GB (gigabytes) of memory into a tiny microSDHC card. Click on the link below to find out how and see some cool pictures.

    Sandisk Uses Nine-Chip Stack in Latest microSD Card

    Holy schmenkies Batman! NINE chips stacked on one another! And wiredbonded together to boot. I'm humbled at what they're doing. OMFG!

    When the author mentions that each chip has been thinned to less than 30µm (microns or millionth of a meter). It would take a stack of over 30 of those chips to make it one millimeter thick! Those chips are made on wafers 300mm in diameter (12 inches or roughly the size of an LP record or LaserDisc) that was orginally 725µm thick. It's then thinned using one of a number of techniques including grinding and plasma processing...

    Impressive!
     
  2. Anakir

    Member Anakir Project: Melee

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    Micro technology is amazing. I always wondered how they made something as small as your finger nail have the ability to store files as well.
     
  3. Agjsdfd

    Member Agjsdfd My title

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    Pretty amazing..

    Compare those with the HUGE hdd from 1990s...
     
  4. Splych

    Member Splych GBAtemp's Lurker

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    Wow. So small O_O

    I wonder what it will be like in the future... How small the technology will be?
     
  5. Agjsdfd

    Member Agjsdfd My title

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    Invisible perhaps. You never know.
     
  6. blainy

    Member blainy GBAtemp Fan

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    im sure u mean "physically huge" [​IMG]

    i guess the cost per MB has gone down considerably too since way back when:
    [​IMG]
     
  7. Daemon.nds

    Newcomer Daemon.nds Advanced Member

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    If we all get a hard drive like that, then we would each be able to store over 50 images, or a whole song even.
     
  8. TrolleyDave

    Former Staff TrolleyDave Philosolosophising

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    lol You wouldn't have been able to store any songs on it, there was no MP3's back then. The song would have to have been stored as a very large uncompressed sample!
     
  9. KingdomBlade

    Member KingdomBlade Blade v3+ (I R SHMEXY)

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    If hard drives where like that now, the system files probably won't even fit.
     

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