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Assignee: SunDisk Corporation


Location: SantaClara, CA
No. of patents: 21

NumberTitleIssue Date
5712180EEPROM with split gate source side injection
Novel memory cells utilize source-side injection, allowing very small programming currents. If desired, to-be-programmed cells are programmed simultaneously while not requiring an unacceptably large programming current for any given programming operation....
01/27/1998
5471478Flash EEPROM array data and header file structure
A file structure employed in a flash electrically erasable and programmable read only memory ("EEPROM") system and aspects of forming and using certain data fields within such a file structure. An array of rows and columns of EEPROM memory cells is divide...
11/28/1995
5438573Flash EEPROM array data and header file structure
A file structure employed in a flash electrically erasable and programmable read only memory ("EEPROM") system and aspects of forming and using certain data fields within such a file structure. An array of rows and columns of EEPROM memory cells is divide...
08/01/1995
5436587Charge pump circuit with exponetral multiplication
A charge pump circuit comprises a plurality of voltage doubler circuits connected together such that a first voltage output generated by a first portion of a kth one of the voltage doubler circuits is substantially equal to Vdd*2k and Vdd*2
07/25/1995
5430859Solid state memory system including plural memory chips and a serialized bus
A memory system includes an array of solid-state memory devices which are in communication with and under the control of a controller module via a device bus with very few lines. This forms an integrated-circuit mass storage system which is contemplated t...
07/04/1995
5428621Latent defect handling in EEPROM devices
A memory system having a two dimensional array of EEPROM or Flash EEPROM cells is addressable by rows and columns. A word line is connected to the control gates of all the cells in each row, an erase line is connected to all the erase gates of each sector...
06/27/1995
5422842Method and circuit for simultaneously programming and verifying the programming of selected EEPROM cells
A method and circuit programs and automatically verifies the programming of selected EEPROM cells without alternating between programming and reading modes like prior art methods and circuitry. The circuitry includes a programming circuit and a bit line v...
06/06/1995
5418752Flash EEPROM system with erase sector select
A system of Flash EEprom memory chips with controlling circuits serves as non-volatile memory such as that provided by magnetic disk drives. Improvements include selective multiple sector erase, in which any combinations of Flash sectors may be erased tog...
05/23/1995
5396468Streamlined write operation for EEPROM system
Various optimizing techniques are used for erasing semiconductor electrically erasable programmable read only memories (EEPROM). An erase algorithm accomplishes erasing of a group of memory cells by application of incremental erase pulses. Techniques incl...
03/07/1995
5380672Dense vertical programmable read only memory cell structures and processes for making them
A memory array of PROM, EPROM or EEPROM cells has each cell formed in a trench of a thick oxide layer deposited on a silicon substrate, in a manner that a significant portion of opposing areas of the floating gate and control gate of each cell which provi...
01/10/1995
5369615Method for optimum erasing of EEPROM
Various optimizing techniques are used for erasing semiconductor electrically erasable programmable read only memories (EEPROM), An erase algorithm accomplishes erasing of a group of memory cells by application of incremental erase pulses, Techniques incl...
11/29/1994
5343063Dense vertical programmable read only memory cell structure and processes for making them
A memory array of PROM, EPROM or EEPROM cells has each cell formed in a trench of a thick oxide layer deposited on a silicon substrate, in a manner that a significant portion of opposing areas of the floating gate and control gate of each cell which provi...
08/30/1994
5313421EEPROM with split gate source side injection
Novel memory cells utilize source-side injection, allowing very small programming currents. If desired, to-be-programmed cells are programmed simultaneously while not requiring an unacceptably large programming current for any given programming operation....
05/17/1994
5297148Flash eeprom system
A system of Flash EEprom memory chips with controlling circuits serves as non-volatile memory such as that provided by magnetic disk drives. Improvements include selective multiple sector erase, in which any combinations of Flash sectors may be erased tog...
03/22/1994
5272669Method and structure for programming floating gate memory cells
A novel method and structure are taught for narrowing the distribution of charge on the floating gates after electrical erasure of a population of cells. This allows faster programming following erasure. An additional recovery step is performed after eras...
12/21/1993
5270979Method for optimum erasing of EEPROM
Various optimizing techniques are used for erasing semiconductor electrically erasable programmable read only memories (EEPROM). An erase algorithm accomplishes erasing of a group of memory cells by application of incremental erase pulses. Techniques incl...
12/14/1993
5200959Device and method for defect handling in semi-conductor memory
A solid-state memory array such as an electrically erasable programmable read only memory (EEprom) or Flash EEprom array is used to store sequential data in a prescribed order. The memory includes a first information list containing addresses and defect t...
04/06/1993
5198380Method of highly compact EPROM and flash EEPROM devices
Structures, methods of manufacturing and methods of use of electrically programmable read only memories (EPROM) and flash electrically erasable and programmable read only memories (EEPROM) include split channel and other cell configurations. An arrangemen...
03/30/1993
5172338Multi-state EEprom read and write circuits and techniques
Improvements in the circuits and techniques for read, write and erase of EEprom memory enable non-volatile multi-state memory to operate with enhanced performance over an extended period of time. In the improved circuits for normal read, and read between ...
12/15/1992
5163021Multi-state EEprom read and write circuits and techniques
Improvements in the circuits and techniques for read, write and erase of EEprom memory enable nonvolatile multi-state memory to operate with enhanced performance over an extended period of time. In the improved circuits for normal read, and read between w...
11/10/1992
5070032Method of making dense flash EEprom semiconductor memory structures
An improved electrically erasable and programmable read only memory (EEprom) structure and processes of making it which results in a denser integrated circuit, improved operation and extended lifetime. In order to eliminate certain ill effects resulting f...
12/03/1991
 
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