Techniques for providing a direct injection semiconductor memory device

Patent metadata

Field	Value
Publication number	US-9425190-B2
Application number	US-201414503784-A
Country	US
Kind code	B2
Filing date	Oct 1, 2014
Priority date	Apr 27, 2009
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

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.

First claim

The invention claimed is:

1. A direct injection semiconductor memory device comprising:
a first region coupled to a bit line;
a second 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 region and the second region, wherein the first region, the body region, the second region are arranged in a sequential contiguous manner; and
a substrate coupled to a carrier injection line, wherein the second region is disposed directly on the substrate, and wherein the body region is disposed directly on the second region opposite the substrate.

2. The direct injection semiconductor memory device of claim 1 , wherein the first region and the second region have a common first doping polarity.

3. The direct injection semiconductor memory device of claim 2 , wherein the first region and the second region are doped with donor impurities.

4. The direct injection semiconductor memory device of claim 2 , wherein the first region and the second region are doped with acceptor impurities.

5. The direct injection semiconductor memory device of claim 2 , wherein the first region and the second region have different doping concentrations.

6. The direct injection semiconductor memory device of claim 2 , wherein the body region and the substrate have a common second doping polarity.

7. The direct injection semiconductor memory device of claim 6 , wherein the body region and the substrate are doped with donor impurities.

8. The direct injection semiconductor memory device of claim 6 , wherein the body region and the substrate are doped with acceptor impurities.

9. The direct injection semiconductor memory device of claim 6 , wherein the body region and the substrate have different doping concentrations.

10. The direct injection semiconductor memory device of claim 1 , wherein the first region, the body region, and the second region form a bipolar transistor.

11. The direct injection semiconductor memory device of claim 10 , wherein the bipolar transistor is an NPN transistor.

12. The direct injection semiconductor memory device of claim 10 , wherein the bipolar transistor is a PNP transistor.

13. The direct injection semiconductor memory device of claim 1 , wherein the second region and the substrate form a PN junction diode.

14. The direct injection semiconductor memory device of claim 1 , wherein the first region, the body region, and the second region are formed in a sequential contiguous vertical structure substantially perpendicular to a plane formed by the substrate.

15. The direct injection semiconductor memory device of claim 1 , wherein the word line is disposed on at least two opposing sides of the memory cell.

16. The direct injection semiconductor memory device of claim 1 , wherein the source line and the bit line are disposed on opposite sides of the memory cell.

17. The direct injection semiconductor memory device of claim 1 , wherein the source line is disposed on at least two opposing sides of the memory cell.

18. The direct injection semiconductor memory device of claim 1 , wherein the second region is configured at least in part as a planar base region upon which the first region and the body region are formed in a sequential contiguous vertical structure substantially perpendicular to the planar base region.

19. The direct injection semiconductor memory device of claim 18 , wherein the planar base region is formed directly on the substrate.

20. The direct injection semiconductor memory device of claim 18 , wherein the planar base region is shared by at least one additional direct injection semiconductor memory device.

Assignees

• Micron Technology Inc

Inventors

• Luthra Yogesh
• Okhonin Serguei
• Nagoga Mikhail

Classifications

• H10D84/121

  BJTs having built-in components · CPC title

• H10D10/40

  Vertical BJTs {(Vertical Heterojunction BJTs H10D10/821)} · CPC title

• H10D84/617 Primary

  Combinations of vertical BJTs and only diodes · CPC title

• G11C11/4074

  Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits · CPC title

• G11C8/08

  Word line control circuits, e.g. drivers, boosters, pull-up circuits, pull-down circuits, precharging circuits, for word lines · CPC title