Cleaning solutions including nucleophilic amine compound having reduction and oxidation potentials
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B08B-003/04
C11D-003/26
C11D-003/30
C11D-003/43
출원번호
US-0633459
(2006-12-05)
등록번호
US-7387130
(2008-06-17)
발명자
/ 주소
Lee,Wai Mun
Pittman, Jr.,Charles U.
Small,Robert J.
출원인 / 주소
EKC Technology, Inc.
대리인 / 주소
Morgan Lewis & Bockius LLP
인용정보
피인용 횟수 :
3인용 특허 :
94
초록▼
A composition for removing resists and etching residue from substrates containing at least one nucleophilic amine compound having oxidation and reduction potentials, at least one organic solvent, water and, optionally, a chelating agent is described. The chelating agent is preferred to be included s
A composition for removing resists and etching residue from substrates containing at least one nucleophilic amine compound having oxidation and reduction potentials, at least one organic solvent, water and, optionally, a chelating agent is described. The chelating agent is preferred to be included since it provides added stability and activity to the cleaning composition so that the composition has long term effectiveness. If a chelating agent is not present, the composition, while providing for adequate stripping and cleaning upon initial use of the composition following mixing, has only short term stability. In this latter instance, the nucleophilic amine compound and organic solvent components of the composition preferably are maintained separate from each other until it is desired to use the composition. Thereafter, the components are combined.
대표청구항▼
We claim: 1. A method for replenishing a resist and etching residue removal composition comprising adding a chelating agent to said composition after said composition has been used to remove resist and etching residue from a semiconductor substrate, wherein said composition comprises: hydroxylamine
We claim: 1. A method for replenishing a resist and etching residue removal composition comprising adding a chelating agent to said composition after said composition has been used to remove resist and etching residue from a semiconductor substrate, wherein said composition comprises: hydroxylamine or a derivative thereof having a general formula of: wherein R1, R2, and R3 are independently hydrogen; a C1-C6 straight, branched or cyclo alkyl, alkenyl, or alkynyl group; an acyl group; a straight or branched alkoxy group, amidyl group, carboxyl group, alkoxyalkyl group, alkylamino group, alkylsulfonyl group, or sulfonic acid group; or a salt thereof, at least one organic solvent and water. 2. The method of claim 1, further comprising rinsing said semiconductor substrate with a rinse comprising water after removing said resist and etching residue from said semiconductor substrate. 3. The method of claim 1, wherein the composition comprises at least one organic solvent which is miscible with the hydroxylamine or a derivative thereof. 4. The method of claim 1, wherein the composition is reactivated with the chelating agent, wherein the chelating agent is added at an amount of 5 parts by weight to an existing 100 parts by weight of the composition. 5. The method of claim 1, wherein the hydroxylamine or derivative thereof comprises hydroxylamine. 6. The method of claim 4, wherein the chelating agent added for replenishment is catechol and further adding water to said composition after said composition has been used to remove resist and etching residue, wherein the water is added at an amount of 18 parts by weight to an existing 5 parts by weight of said chelating agent and an existing 100 parts by weight of the composition. 7. The method of claim 1, wherein the resist and etching residue removal composition comprises: (1) from about 5% to about 50% by weight of hydroxylamine; (2) from 10 to about 80% by weight of one or more organic solvents; (3) water; (4) from about 5% to 30% by weight of chelating agent(s) comprising at least one of: (i) one or more hydroxy-functional compounds of formula II: wherein n=1-4, m=2-5, and each R is independently hydrogen; a C1-C6 straight, branched or cyclo alkyl, alkenyl, or alkynyl group; an acyl group; a straight or branched alkoxy group, amidyl group, carboxyl group, alkoxyalkyl group, alkylamino group, alkylsulfonyl group, or sulfonic acid group; or a salt thereof; (ii) thiophenol, a derivative thereof, or mixtures thereof, each of formula III: wherein R17 is OH or COOH; (iii) an ethylene diamine tetracarboxylic acid, a derivative thereof, or mixtures thereof, each of formula IV: wherein R18, R19, R20 and R21 can individually be H or NH4; and (iv) one or more alkylammonium hydroxides of the formula V, (R11 R12 R13 R14)NOH, wherein R11, R12, R13, and R14 are the same or different and comprise alkyl groups having from 1 to 5 carbon atoms. 8. The method of claim 7, further adding 18 percent by weight water, based on the total weight of said resist and etching residue removal composition, to said composition after said composition has been used to remove resist and etching residue. 9. The method of claim 7, wherein the composition is reactivated with 5 percent by weight of the chelating agent, based on the total weight of said resist and etching residue removal composition. 10. The method of claim 7, wherein the chelating agent added for replenishment is catechol. 11. The method of claim 9, wherein the chelating agent added for replenishment is catechol and further adding 18 percent by weight water, based on the total weight of said resist and etching residue removal composition, to said composition after said composition has been used to remove resist and etching residue.
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