Dr. Robert H. Dennard and his coworkers at Intel were working on early field-effect transistors and integrated circuits, and he got the idea for the creation of the DRAM. He then began to think of ideas to make a chip that had a single transistor and a small capacitor. There are two types of memory, dynamic random access memory and static random access memory. Because dynamic random acess memory has to be refreshed thousands of times per second, SRAM is faster.
In 1969, William Regitz of Honeywell was looking for a company to help him develop his dynamic memory circuit based on a novel 3-transistor cell. Intel saw the many opprutunities that taking his offer held, so they decided to work with him on the idea. The company first created the i1102, but that had many problems such as it needed needed substrate bias, yields were low, and it caused the devices to have very small operating margins.
To solve these problems they created the i1102 alternative, which used different cell techinques.The i1103 basically did not function, until it was discovered that there was an overlap between the "PRECH" clock and the "CENABLE" clock. Nevertheless, the product was put on the market. It was John Reed's job to improve the product prgressively by doing things like setting the refresh time at two milliseconds. This chip became the best selling semiconductor memory chip in the world by 1972.
http://inventors.about.com/library/weekly/aa100898.htm
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