It was clear to Robert Dennard and his original team members that DRAM would make existing memory technologies obsolete, but no one, including Dennard himself, could have anticipated its use in today’s vast range of applications.
By the numbers
16
There were 16 kilobytes of DRAM in IBM’s first personal computer.
4
Many of today’s personal computers are equipped with 4 or more gigabytes of DRAM
1024
There are 1024 megabytes in one gigabyte.
56
Dr. Dennard has 56 patents related to his work at IBM.
3,387,286
The US Patent Number 3,387,286 was assigned to Dennard’s invention, called “Field-Effect Transistor Memory,” or DRAM.
1 Billion
More than one billion gigabytes of DRAM were sold in 2009.
“I knew of him for years before I came to IBM. I only knew of his accomplishments, and that was very intimidating at first. I thought, Here’s the man who invented DRAM. This guy is famous. ... He was not the way I imagined him at all.”
“Thanks for the Memories,” IEEE Spectrum
May, 2009“Memory technology development, in particular dynamic random access memory (DRAM), has been the greatest driving force in the advancement of solid-state technology for integrated circuit development over the last 40 years. ... This truly visionary work, using a single transistor and capacitor (the 1T1C), is one of the most manufactured devices in the history of mankind.”
“The 1T1C DRAM…” Franklin Institute Presentation
April 25, 2007“I really wasn’t that involved in scientific things until I really came to IBM and they handed me a patent notebook and said ‘put all your ideas in there.’”
“IBM Scientist: Robert Dennard,” YouTube video, 4:29, posted by “IBMLabs”
Watch the video February 27, 2008“I had the idea that I might come for a few years and learn the tricks of the trade. But things here are so much fun I never thought about going anywhere else.”
“IBM Scientist: Robert Dennard,” YouTube video, 4:29, posted by “IBMLabs”
Watch the video February 27, 2008“We found that if we reduced all of the dimensions of this device simultaneously … these much smaller transistors would really work. They would switch on and off cleanly just like the bigger versions. And then we discovered there were several important advantages. Besides being much denser, and therefore they should be very low cost, they would also operate faster, directly in proportion to how small they became.”
“IBM Scientist: Robert Dennard,” YouTube video, 4:29, posted by “IBMLabs”
Watch the video February 27, 2008“Sometimes, when someone meets me in an elevator and says ‘Oh, you’re the guy who invented DRAM,’ it takes me aback a little bit. But I’m becoming a bit more comfortable with … the reality, that the work that I’ve been involved with and many other people have been involved with for the last 35 or so years has really made a tremendous impact on the world … in just every conceivable way.”
“IBM Scientist: Robert Dennard,” YouTube video, 4:29, posted by “IBMLabs”
Watch the video February 27, 2008“The implications of scaling were remarkable. … These were exactly the results we needed to develop a competitive low cost memory … we were convinced that MOSFET memory would replace fixed head files. Further, we speculated that it may also replace moveable head disk storage for some applications. We also started to believe that the MOSFET would someday replace the bipolar transistor in high-performance logic and memory applications.”
“Recollections on MOSFET Scaling,” Journal of Solid-State Circuits
January 2007“Without scaling theory, I doubt that Moore’s Law could have survived for more than three decades. … The scaling principle and Moore’s Law have been inseparable in terms of providing a driving force to technology research and development…”
“Impact of Scaling…” IEEE Solid-State Circuits Society News, Winter
2007“Scaling theory has been the organizing principle of the progress of the semiconductor industry throughout three decades. It has created a framework for continued improvement in density and cost performance and facilitated the desegregation of the entire industry around design and manufacturing. Few concepts in our time have had as much influence on the economy.”
“Device Scaling…” IEEE Solid-State Circuits Society News, Winter
2007"Fear of the demise of DRAM is overblown."
“Memcon Question #2: What Comes After DRAM?” Cadence Industry Insights Blog
August 3, 2010