Memory Issues in Space & Medical Applications

How an alpha particle disrupts a memory bitThe Memory Guy was recently asked about using memories in a satellite. What would be a good technology to use in a space application?

The problem with space is that there is a lot of radiation.  Radiation on the earth’s surface is lower because it is stopped by the atmosphere, but in space there is an abundance of radiation that interferes with most semiconductors.  Radiation is also a concern in certain medical applications where a memory must maintain its contents while undergoing sterilization through irradiation.  Experiments on conventional flash memories have shown data loss at only 2% of the Continue reading

Fundamentals of Memory – Free Online Course

Fundamentals of Memory Course - EE TimesSome time ago The Memory Guy was asked by Numonyx (later acquired by Micron) to put together an online course for EE Times on memory technologies, explaining how each one works and where it is used.

Although the course was very well received, I never posted a link to it on The Memory Guy blog.  This post is intended to correct that error.

The course runs 75 minutes and covers the basics of DRAM, non-volatile RAM, SRAM, NAND flash, NOR flash, mask ROM, and EEPROM.  It explains each technology’s advances in size, cost and performance, leading up to the development of Continue reading

Cheesecake and Floating Gates

Dr. Simon Sze, Co-Inventor of the Floating GateOne of the more fun aspects of last week’s Flash Memory Summit was the presentation of the Lifetime Achievement Award.  This is something that the show’s management has allowed me to do for the past four events.

This year’s award went to Dr. Simon Sze, who co-invented the floating gate transistor (the basis for all flash, EEPROM, and EPROM) at Bell Labs back in 1967.

Sze and his partner Dawon Kahng were finishing lunch in the company cafeteria with a cheesecake dessert.  The two discussed what would happen if a MOSFET was built with extra layers like the layers in the cake.  Their intent was to use semiconductors to replace Continue reading

The Father of Flash Memory

Dr. Fujio Masuoka, the inventor of NAND and NOR flash memoryAt the Flash Memory Summit in August I had the honor of awarding Fujio Masuoka, the inventor of both NAND and NOR flash, the Flash Memory Summit Lifetime Achievement Award.  This award is given to the giants of the flash memory industry to acknowledge their contributions.

Dr. Masuoka first described NOR flash at the 1984 International Electron Device Meeting (IEDM) in San Francisco, and NAND flash at the same venue in 1987.  His paper “A new flash EEPROM cell using triple polysilicon technology” introduced a technology that is now used everywhere.

The award has also been given to Intel’s Flash team who brought the first commercial products to the market, and SanDisk co-founder Eli Harari, for devising a way to manufacture a floating gate.

David Schwaderer made a video of the presentation and posted it HERE.  Have a watch!


Jim Handy Objective Analysis Memory Market Research +1 (408) 356-2549 Jim.Handy (at)

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