Abstract:
The present invention provides a 6T-SRAM semiconductintg structure including a substrate having an SOI region and a bulk-Si region, wherein the SOI region and the bulk-Si region have a same or differing crystallographic orientation; an isolation region separating the SOI region from the bulk Si-region; and at least one first device located in the SOI region and at least one second device located in the bulk-Si region. The SOI region has a silicon layer atop an insulating layer. The bulk-Si region further comprises a well region underlying the second device and a contact to the well region, wherein the contact stabilizes floating body effects. The well contact is also used to control the threshold voltages of the FETs in the bulk-Si region to optimized the power and performance of the SRAM cell built from the combination of the SOI and bulk-Si region FETs.
Abstract:
PROBLEM TO BE SOLVED: To provide a circuit and method which decrease a DC power consumption amount of a clock type ratio digital logic circuit. SOLUTION: This circuit analyzes a voltage transition of a ratio digital logic circuit 160, and a switching circuit 150 controls a DC current which flows in the entire circuit based on the transition. By adjusting the DC current flowing in the digital logic circuit, a hot electronic action which puts an obstacle in the digital circuit and problematic harmful influences of electric movement are decreased. This circuit and method are exemplified by a ratio logic NOR function which utilizes a MOSFET technique.
Abstract:
PROBLEM TO BE SOLVED: To provide a detection circuit and a method for detecting silicon well voltage or current indicating collision of an alpha particle or a cosmic ray to the silicon well in silicon substrate. SOLUTION: An effective application of the detection circuit is use in redundancy repair latches used for an SRAM. In the redundancy repair latches, normally writing is once performed when power is on in order to register wrong latch data, though writing is not performed again usually. When either state of these latches is altered by SER phenomena (soft error rate: collision of the alpha particle or the cosmic ray, and the like), the recovery data for the redundant latch of the SRAM is mapped incorrectly. In this detection circuit and the method, whether the SER phenomenon occurs in these latches is monitored, when occurring, reloading the recovery data is performed to the redundancy repair latches. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a radiation detector formed by using a silicon-on insulator technology. SOLUTION: The radiation detector comprises a silicon layer formed on an insulating substrate and having a PNPN structure, and a gate layer formed on the PNPN structure and having a PN gate. Latch-up occurs only in response to incident radiation in the radiation detector. In a second mode, the radiation detector has a silicon-on insulator PNPN diode structure and latch-up occurs only in response to incident radiation in the radiation detector. In a third mode, a silicon-on insulator radiation detector has a silicon layer formed on the insulating substrate, the silicon layer has the PNPN structure and a gate layer formed thereon, the gate layer has a PN gate, and latch-up occurs only in response to incident radiation in the radiation detector. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
The present invention provides a 6T-SRAM semiconductintg structure including a substrate having an SOI region and a bulk-Si region, wherein the SOI region and the bulk-Si region have a same or differing crystallographic orientation; an isolation region separating the SOI region from the bulk Si-region; and at least one first device located in the SOI region and at least one second device located in the bulk-Si region. The SOI region has a silicon layer atop an insulating layer. The bulk-Si region further comprises a well region underlying the second device and a contact to the well region, wherein the contact stabilizes floating body effects. The well contact is also used to control the threshold voltages of the FETs in the bulk-Si region to optimized the power and performance of the SRAM cell built from the combination of the SOI and bulk-Si region FETs.