Thyristor memory cell with assist device
A vertical thyristor memory array including: a vertical thyristor memory cell, the vertical thyristor memory cell including: a p+ anode; an n-base located below the p+ anode; a p-base located below the n-base; a n+ cathode located below the p-base; an isolation trench located around the vertical thyristor memory cell; an assist gate located in the isolation trench adjacent the n-base wherein an entire vertical height of the assist gate is positioned within an entire vertical height of the n-base.
1. A vertical thyristor memory array comprising:
A vertical thyristor memory cell, the vertical thyristor memory cell comprising:
a p+ anode;
an n-base disposed below the p+ anode;
a p-base disposed below the n-base;
an n+ cathode disposed below the p-base;
an isolation trench disposed around the vertical thyristor memory cell;
an assist gate disposed in the isolation trench around the n-base wherein an entire vertical height of the assist gate is disposed within an entire vertical height of the n-base.
2. The vertical thyristor memory array of claim 1 wherein the assist gate runs orthogonal to the bit lines.
3. The vertical thyristor memory array of claim 2 wherein the assist gate comprises NMOS.
4. The vertical thyristor memory array of claim 1 wherein the assist gate runs parallel to the word lines.
5. The vertical thyristor memory array of claim 1 wherein the assist gate is disposed completely around the n-base.
6. The vertical thyristor memory array of claim 1 wherein the assist gate is disposed partially in segments around the n-base.
7. A vertical thyristor memory array comprising:
A vertical thyristor memory cell, the vertical thyristor memory cell comprising:
a p+ anode;
an n-base disposed below the p+ anode;
a p-base disposed below the n-base;
an n+ cathode disposed below the p-base;
an isolation trench disposed around the vertical thyristor memory cell;
an assist gate disposed in the isolation trench around the p-base wherein an entire vertical height of the assist gate is disposed within an entire vertical height of the p-base.
8. The vertical thyristor memory array of claim 7 wherein the assist gate comprises PMOS.
9. The vertical thyristor memory array of claim 7 wherein the assist gate runs orthogonal to the bit lines.
10. The vertical thyristor memory array of claim 7 wherein the assist gate runs parallel to the word lines.
11. The vertical thyristor memory array of claim 7 wherein the assist gate is disposed completely around the p-base.
12. The vertical thyristor memory array of claim 7 wherein the assist gate is disposed partially in segments around the p-base.