摘要:
An EEPROM includes a semiconductor substrate and a device isolation region defining first, second and third active regions in the semiconductor substrate. The EEPROM also includes at least one first insulation region in at least one first trench in the first active region. A floating gate insulation layer is disposed on the at least one first insulation region and the first, second and third active regions and a floating gate conduction layer is disposed on the floating gate insulation layer. Impurity-containing regions may be disposed in each of the first, second and third active regions at respective sides of the floating gate conduction layer. The floating gate insulation layer may include at least one thinned portion proximate the at least one first insulation region, which may aid Fowler-Nordheim tunneling at this site.
摘要:
A method of programming an EEPROM including a first active region, a second active region and a third active region located separately in a semiconductor substrate, a common floating gate above and intersecting the active regions, first impurity regions located at both sides of the common floating gate in the first active region, second impurity regions located at both sides of the common floating gate in the second active regions and third impurity region, located at both sides of the common floating gate in the third active region. The method includes: applying a programming voltage to the first impurity regions in the first active region and the third impurity regions in the third active region; and applying a ground voltage to the second impurity regions in the second active region.
摘要:
Some embodiments of the present invention provide high voltage transistors including a semiconductor substrate and a device isolation film defining an active region in the semiconductor substrate. A gate electrode extends along a central portion of the active region while maintaining a predetermined width on the semiconductor substrate. A second well is formed on both sides of the gate electrode in the semiconductor substrate, and partially extends to a bottom surface of the device isolation film. The active region in the semiconductor substrate comprises a first active region disposed under the gate electrode, and separating the device isolation film and a second active region defined by the first active region and the device isolation film. Methods of manufacturing high voltage transistors are also provided.
摘要:
Some embodiments of the present invention provide high voltage transistors including a semiconductor substrate and a device isolation film defining an active region in the semiconductor substrate. A gate electrode extends along a central portion of the active region while maintaining a predetermined width on the semiconductor substrate. A second well is formed on both sides of the gate electrode in the semiconductor substrate, and partially extends to a bottom surface of the device isolation film. The active region in the semiconductor substrate comprises a first active region disposed under the gate electrode, and separating the device isolation film and a second active region defined by the first active region and the device isolation film. Methods of manufacturing high voltage transistors are also provided.