Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Semiconductor memory device and method of controlling imprint condition thereof










Image Number 2 for United States Patent #5953245.

A semiconductor memory device with a plurality of memory cells each having a ferroelectric material for storing a data item by its residual polarization is made usable selectably both as a RAM and as a ROM by controlling the so-called "imprint condition" of the ferroelectric material. When some of the memory cells are going to be used to a ROM or when the memory cells in an imprint condition are going to be used a RAM, heat and/or voltage pulses with an appropriate polarity are applied to the data-storing ferroelectric material to change its hysteresis characteristics.








 
 
  Recently Added Patents
Control system for an internal combustion engine
Lipoprotein analysis by differential charged-particle mobility
Semiconductor memory device and manufacturing method thereof
Method for forming a semiconductor device using selective epitaxy of group III-nitride
Battery power management system and method
Bamboo scrimber and manufacturing method thereof
System and method for providing restrictions on the location of peer subnet manager (SM) instances in an infiniband (IB) network
  Randomly Featured Patents
Optical disk apparatus with an improved track jump performance
Activity surfaces
SRAM bit cell with self-aligned bidirectional local interconnects
Apparatus for variable resistive memory punchthrough access method
Break-away fastening system for air bag deployment doors
Synchronous rectification for low voltage motor drive
Human .beta.-casein, process for producing it and use thereof
Preparation of tetraazaindenes
Ultrasonic imaging method and apparatus
Piston metering pump