Methods of sealing openings, and methods of forming integrated assemblies

1. A method of forming an integrated assembly, comprising:

forming a construction to include a structure having an exposed surface, and an opening proximate the structure; the construction including an aperture extending into the opening;

depositing a first material to form a mass along the exposed surface of the structure; and

sputtering particles from the mass to form a sealant material which extends across the aperture and traps a void within the opening.

2. The method of claim 1 wherein the structure has, along a cross-section, a top surface and a pair of opposing sidewall surfaces extending downwardly from the top surface; and wherein the depositing forms the mass to be along the top surface of the structure and along upper segments of the sidewall surfaces of the structure.

3. The method of claim 1 further comprising treating the sealant material to fill any pinholes present in the sealant material.

4. The method of claim 3 wherein the treating comprises deposition of a layer of insulative material over the sealant material.

5. The method of claim 4 wherein the insulative material comprises a same composition as the sealant material.

6. The method of claim 5 wherein the insulative material and the sealant material both comprise silicon dioxide.

7. The method of claim 4 wherein the insulative material comprises a different composition than the sealant material.

8. The method of claim 7 wherein the insulative material comprises silicon nitride, and wherein the sealant material comprises silicon dioxide.

9. The method of claim 1 wherein the sputtering occurs simultaneously with some of the deposition.

10. The method of claim 9 wherein the deposition and sputtering are conducted within a reaction chamber in the presence of chemical species which include SiCl 4 together with one or more of O 2 , O 3 , H 2 O 2 .

11. The method of claim 1 wherein the sputtering occurs substantially entirely after the deposition.

12. The method of claim 1 wherein the mass comprises one or more elements selected from group 14 of the periodic table.

13. The method of claim 1 wherein the mass comprises silicon.

14. The method of claim 1 wherein the mass comprises at least one element selected from group 14 of the periodic table; and wherein the depositing utilizes a precursor comprising one both of a halide or a hydride of said at least one element.

15. The method of claim 14 wherein the mass comprises silicon in combination with one or both of chlorine and hydrogen.

16. The method of claim 15 wherein the sealant material comprises silicon dioxide.

17. The method of claim 16 wherein the sputtering is conducted under oxidizing conditions.

18. The method of claim 17 wherein the sputtering is conducted utilizing one or both of ozone and hydrogen peroxide.

19. A method of forming an integrated assembly, comprising:

forming a construction to include, along a cross-section, a conductive structure having a top surface, and a pair of opposing sidewall surfaces extending downwardly from the top surface; the construction also including insulative material over the top surface, and including rails along the sidewall surfaces; each of the rails comprising a sacrificial material along a panel of a non-sacrificial material;

removing the sacrificial material to leave openings between the sidewall surfaces and the panels of the non-sacrificial material;

forming a mass over a top of the insulative material and along upper segments of sides of the insulative material; and

sputtering particles from the mass to form a sealant material which extends across the openings and traps voids within the openings.

20. The method of claim 19 further comprising treating the sealant material to fill any pinholes present in the sealant material.

21. The method of claim 20 wherein the insulative material is a first insulative material, and wherein the treating comprises deposition of a layer of a second insulative material over the sealant material.

22. The method of claim 19 wherein the mass comprises one or more elements selected from group 14 of the periodic table.

23. The method of claim 19 wherein the mass comprises silicon.

24. The method of claim 19 wherein the sealant material comprises silicon dioxide.

25. The method of claim 19 wherein the sputtering is conducted under oxidizing conditions.

26. A method of forming an integrated assembly, comprising:

forming a construction to include, along a cross-section, a pair of digit lines spaced from one another by an intervening region; each of the digit lines having a top surface, and a pair of opposing sidewall surfaces extending downwardly from the top surface; the construction including insulative structures over the top surfaces, and including rails along the sidewall surfaces; the rails comprising a sacrificial material sandwiched between a pair of panels; the construction including a conductive interconnect within the intervening region; the insulative structures comprising a first insulative material;

removing the sacrificial material to leave openings between the panels;

forming masses over tops of the insulative structures and along upper segments of sides of the insulative structures;

sputtering particles from the masses to form a sealant material which extends across the openings and covers voids within the openings;

forming a second insulative material across the insulative structures, across the sealant material and across the conductive interconnect;

removing a portion of the second insulative material to expose a region of the conductive interconnect; and

coupling the exposed region of the conductive interconnect with a charge-storage device.

27. The method of claim 26 further comprising treating the sealant material to fill any pinholes present in the sealant material.

28. The method of claim 27 wherein the treating comprises deposition of a layer of a third insulative material over the sealant material.

29. The method of claim 28 wherein the third insulative material comprises a same composition as the sealant material.

30. The method of claim 28 wherein the third insulative material comprises a different composition than the sealant material.

31. The method of claim 26 wherein the mass comprises one or more elements selected from group 14 of the periodic table.

32. The method of claim 26 wherein the sealant material comprises silicon dioxide.