IP Library › Granted Patent US 12,205,820
Granted Patent B2
US 12,205,820 · App. 17/808,741 · Granted Jan 21, 2025

Deposition of organic films

Inventors: Eva E. Tois (Espoo, FI); Hidemi Suemori (Helsinki, FI); Viljami J. Pore (Helsinki, FI); Suvi P. Haukka (Helsinki, FI); Varun Sharma (Helsinki, FI)
Assignee: ASM IP Holding B.V.
H01L21/28562B05D1/60C23C16/02C23C16/04C23C16/45525C23C16/45527C23C16/45553C23C16/56H01L21/02118H01L21/02205H01L21/0228H01L21/3065H01L21/31138H01L21/76826H01L21/76834
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Quick Facts
Patent No.
US 12,205,820
App. No.
17/808,741
Granted
Jan 21, 2025
Kind
B2
Abstract

Processes are provided herein for deposition of organic films. Organic films can be deposited, including selective deposition on one surface of a substrate relative to a second surface of the substrate. For example, polymer films may be selectively deposited on a first metallic surface relative to a second dielectric surface. Selectivity, as measured by relative thicknesses on the different layers, of above about 50% or even about 90% is achieved. The selectively deposited organic film may be subjected to an etch process to render the process completely selective. Processes are also provided for particular organic film materials, independent of selectivity.

Claims (29)

1. A process for film deposition, the process comprising one or more deposition cycles comprising:

contacting a first surface of a substrate and a second surface of the substrate with a first vapor phase precursor comprising an amine, wherein the first surface of the substrate comprises a metallic surface, and wherein the second surface comprises an HF-dipped surface; and

contacting the first surface of the substrate and the second surface of the substrate with a second vapor phase precursor comprising an anhydride,

wherein contacting the substrate with the first and second vapor phase precursors forms an organic film selectively on the first surface of the substrate relative to the second surface of the substrate.

2. The process of claim 1 , wherein the amine is a diamine.

3. The process of claim 1 , wherein the amine is 1,6-diaminohexane (DAH).

4. The process of claim 1 , wherein the anhydride is a pyromellitic dianhydride (PMDA).

5. The process of claim 1 , further comprising heating the substrate during the one or more deposition cycles.

6. The process of claim 5 , wherein the substrate is heated to a temperature in a range from 170° C. to 210° C.

7. The process of claim 1 , wherein the process occurs at a pressure of about 100 mTorr.

8. The process of claim 1 , wherein the organic film comprises polyimide.

9. The process of claim 8 , wherein the process is a molecular layer deposition (MLD) process.

10. The process of claim 1 , wherein the organic film comprises polyamic acid.

11. The process of claim 10 , further comprising converting the polyamic acid to polyimide.

12. The process of claim 1 , wherein a selectivity for depositing the organic film selectively on the first surface of the substrate relative to the second surface of the substrate is at least 50%.

13. The process of claim 12 , wherein the selectivity is at least 75%.

14. The process of claim 1 , further comprising:

after contacting the substrate with the first and second vapor phase precursors, subjecting the substrate to an etch process, wherein the etch process has a chemistry for removal of organic material and removes substantially all of any deposited organic film from the second surface of the substrate and does not remove substantially all of the deposited organic film from the first surface of the substrate.

15. The process of claim 14 , wherein the etch process comprises exposing the substrate to one or more of hydrogen atoms, hydrogen radicals, or hydrogen plasma.

16. The process of claim 14 , wherein the etch process comprises exposing the substrate to one or more of oxygen atoms, oxygen radicals, or oxygen plasma.

17. The process of claim 1 , wherein the second surface comprises an HF-dipped Si surface or an HF-dipped Ge surface.

18. The process of claim 1 , wherein the second surface comprises silicon.

19. The process of claim 1 , wherein the second surface comprises SiO 2 .

20. The process of claim 1 , wherein the one or more deposition cycles comprise multiple cycles of alternately and sequentially exposing the substrate to the first vapor phase precursor and the second vapor phase precursor.

21. The process of claim 1 , further comprising cleaning the first surface and the second surface prior to contacting the first surface and the second surface with either of the first vapor phase precursor or the second vapor phase precursor.

22. A process for film deposition, the process comprising one or more deposition cycles comprising:

contacting a first surface of a substrate and a second surface of the substrate with a first vapor phase precursor comprising 1,6-diaminohexane (DAH), wherein the first surface of the substrate comprises a metallic surface, and wherein the second surface comprises an HF-dipped surface; and

contacting the first surface of the substrate and the second surface of the substrate with a second vapor phase precursor comprising pyromellitic dianhydride (PMDA),

wherein contacting the substrate with the first and second vapor phase precursors forms a polyimide film selectively on the first surface of the substrate relative to the second surface of the substrate.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 11, 2022
From: TOIS, EVA E.; SUEMORI, HIDEMI; PORE, VILJAMI J.; HAUKKA, SUVI P.; SHARMA, VARUN
To: ASM IP HOLDING B.V.
Reel/Frame 061378/0176 →
Continuity (4)
Continuation 17078743 · Oct 23, 2020
Continuation 16504861 · Jul 8, 2019
Continuation 15170769 · Jun 1, 2016
Related Publication 20230011277A1 · Jan 12, 2023
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