Techniques for providing a direct injection semiconductor memory device
View Patent ↗Techniques for providing a direct injection semiconductor memory device are disclosed. In one particular exemplary embodiment, the techniques may be realized as a method for biasing a direct injection semiconductor memory device. The method may comprise applying a first voltage potential to a first N-doped region via a bit line and applying a second voltage potential to a second N-doped region via a source line. The method may also comprise applying a third voltage potential to a word line, wherein the word line is spaced apart from and capacitively coupled to a body region that is electrically floating and disposed between the first N-doped region and the second N-doped region. The method may further comprise applying a fourth voltage potential to a P-type substrate via a carrier injection line.
1. A method for biasing a direct injection semiconductor memory device comprising the steps of:
applying a first voltage potential to a first N-doped region of the device via a bit line;
applying a second voltage potential to a second N-doped region of the device via a source line;
applying a third voltage potential to a word line, wherein the word line is spaced apart from and capacitively coupled to a body region of the device that is electrically floating and disposed between the first N-doped region and the second N-doped region, wherein the first N-doped region, the body region, and the second N-doped region form a bipolar transistor; and
applying a fourth voltage potential to a P-type substrate of the device via a carrier injection line, wherein the second N-doped region is formed directly on the P-type substrate.
2. The method according to claim 1 , further comprising increasing the third voltage potential applied to the word line during a hold operation to perform a read operation.
3. The method according to claim 1 , further comprising increasing the second voltage potential applied to the source line during a hold operation to perform a read operation.
4. The method according to claim 1 , further comprising maintaining the second voltage potential applied to the source line during a hold operation to perform a read operation.
5. The method according to claim 1 , further comprising increasing the first voltage potential applied to the bit line during a hold operation in order to reduce a disturbance during a read operation.
6. The method according to claim 1 , further comprising increasing the third voltage potential applied to the word line during a hold operation to perform a write logic high operation.
7. The method according to claim 1 , further comprising lowering the second voltage potential applied to the source line during a hold operation to perform a write logic high operation.
8. The method according to claim 7 , wherein the second voltage potential applied to the source line to perform the write logic high operation is lowered to forward bias a junction between the second N-doped region and the P-type substrate.
9. The method according to claim 1 , further comprising increasing the third voltage potential applied to the word line during a hold operation to perform a write logic low operation.
10. The method according to claim 1 , further comprising increasing the second voltage potential applied to the source line during a hold operation to perform a write logic low operation.
11. The method according to claim 1 , further comprising maintaining the second voltage potential applied to the source line during a hold operation to perform a write logic low operation.
12. The method according to claim 1 , further comprising maintaining the first voltage potential applied to the bit line during a hold operation to perform a write logic low operation.
13. The method according to claim 1 , further comprising increasing the first voltage potential applied to the bit line during a hold operation to maintain a logic high stored in the memory cell.
14. The method according to claim 1 , wherein the second voltage potential applied to the source line is equal to the fourth voltage potential applied to the carrier injection line during a hold operation.
15. A direct injection semiconductor memory device comprising:
a first N-doped region coupled to a bit line;
a second N-doped region coupled to a source line;
a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first N-doped region and the second N-doped region, wherein the first N-doped region, the body region, and the second N-doped region form a bipolar transistor; and
a P-type substrate coupled to a carrier injection line, wherein the second N-doped region is formed directly on the P-type substrate.
16. The direct injection semiconductor memory device according to claim 15 , wherein the second N-doped region and the P-type substrate form a PN junction diode.
17. The direct injection semiconductor memory device according to claim 16 , wherein the first N-doped region, the body region, the second N-doped region, and the P-type substrate are formed in a contiguous vertical structure.
18. A method for biasing a direct injection semiconductor memory device comprising the steps of:
applying a first voltage potential to a first P-doped region of the device via a bit line;
applying a second voltage potential to a second P-doped region of the device via a source line;
applying a third voltage potential to a word line, wherein the word line is spaced apart from and capacitively coupled to a body region of the device that is electrically floating and disposed between the first P-doped region and the second P-doped region, wherein the first P-doped region, the body region, and the second P-doped region form a bipolar transistor; and
applying a fourth voltage potential to an N-type substrate of the device via a carrier injection line, wherein the second P-doped region is formed directly on the N-type substrate.
19. A direct injection semiconductor memory device comprising:
a first P-doped region coupled to a bit line;
a second P-doped region coupled to a source line;
a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first P-doped region and the second P-doped region, wherein the first P-doped region, the body region, and the second P-doped region form a bipolar transistor; and
a N-type substrate coupled to a carrier injection line, wherein the second P-doped region is formed directly on the N-type substrate.
20. The direct injection semiconductor memory device according to claim 19 , wherein the second P-doped region and the N-type substrate form a PN junction diode.
21. The direct injection semiconductor memory device according to claim 20 , wherein the first P-doped region, the body region, the second P-doped region, and the N-type substrate are formed in a contiguous vertical structure.
22. A method for biasing a direct injection semiconductor memory device comprising the steps of:
applying a first voltage potential to a first region of the device via a bit line;
applying a second voltage potential to a second region of the device via a source line, wherein the second region and the first region are commonly doped;
applying a third voltage potential to a word line, wherein the word line is spaced apart from and capacitively coupled to a body region of the device that is electrically floating and disposed between the first region and the second region, wherein the first region, the body region, and the second region form a bipolar transistor; and
applying a fourth voltage potential to a substrate of the device via a carrier injection line, wherein the second region is formed directly on the substrate.
23. The method according to claim 22 , wherein the second region and the substrate form a PN junction diode.
24. A direct injection semiconductor memory device comprising:
a first region coupled to a bit line;
a second region coupled to a source line, wherein the second region and the first region are commonly doped;
a body region spaced apart from and capacitively coupled to a word line, wherein the body region is electrically floating and disposed between the first region and the second region, wherein the first region, the body region, and the second region form a bipolar transistor; and
a substrate coupled to a carrier injection line, wherein the second region is formed directly on the substrate.
25. The direct injection semiconductor memory device according to claim 24 , wherein the second region and the substrate form a PN junction diode.