[특허]Automated process and apparatus for planarization of topographical surfaces

Automated process and apparatus for planarization of topographical surfaces 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B05D-003/12 B05D-003/06
출원번호	UP-0887530 (2004-07-08)
등록번호	US-7790231 (2010-09-27)
발명자 / 주소	McCutcheon, Jeremy Lamb, III, James E.
출원인 / 주소	Brewer Science Inc.
대리인 / 주소	Hovey Williams LLP
인용정보	피인용 횟수 : 0 인용 특허 : 34

초록 ▼

An improved apparatus (20) and method are provided for effective, high speed contact planarization of coated curable substrates such as microelectronic devices to achieve very high degrees of planarization. The apparatus (20) includes a planarizing unit (28) preferably having an optical flat flexible sheet (88) and a backup optical flat body (82), and a curing assembly (30). In operation, a substrate (78) having a planarizable coating (76) is placed within a vacuum chamber (26) beneath sheet (88) and body (82). A pressure differential is created across sheet (88) so as to deflect the sheet into contact with a central region C of the coating (76), whereupon the coating (76) is brought into full planarizing contact with sheet (88) and body (82) by means of a support (114) and vacuum chuck (120); at this point the coating (76) is cured using assembly (30). After curing, a pressure differential is established across sheet (88) for sequentially separating the sheet from the peripheral portion P of the coating, and then full separation of the sheet (88) and coating (76).

대표청구항 ▼

We claim: 1. A method of planarizing a curable coating applied to a substrate, said coating having a surface presenting a surface area with a central region and a surrounding peripheral region, said method comprising the steps of: locating a thin, flexible sheet of material in proximal spaced relationship to said surface; causing said sheet to deflect by creating a pressure differential across said sheet so that the sheet contacts the central region of said surface area but is spaced from said peripheral region; effecting relative movement between the substrate and sheet until the sheet is in face-to-face planarizing contact with substantially all of said surface area; curing said surface coating while maintaining said planarizing contact; and separating said sheet and substrate after said curing step. 2. The method of claim 1, said sheet being a planarizing sheet. 3. The method of claim 1, said sheet being formed of Teflon. 4. The method of claim 1, including the steps of gripping the outer margin of said sheet, and creating said pressure differential such that a greater pressure exists against the face of said sheet remote from said coating. 5. The method of claim 4, including the step of creating vacuum conditions on opposite faces of said sheet, the vacuum level being greater against the face of said sheet adjacent said coating. 6. The method of claim 1, said movement-effecting step comprising the steps of shifting said substrate toward said sheet to establish said planarizing contact. 7. The method of claim 6, including the steps of providing a resilient platen adjacent the face of said substrate remote from said coating, and shifting said platen into contact with the substrate. 8. The method of claim 1, including the step of pressing said substrate and coating against said sheet to establish said planarizing contact. 9. The method of claim 8, including the step of pressing said substrate and coating against said sheet at a level of from about 1 to 90 psi. 10. The method of claim 1, said curing step comprising the step of subjecting said coating to UV radiation. 11. The method of claim 1, said sheet being substantially transparent to UV radiation, said curing step comprising the step of directing UV radiation through said sheet. 12. The method of claim 1, said separating step comprising the steps of first shifting said substrate away from said sheet until the sheet is at least partially detached from said coating, and thereafter creating a pressure differential across the sheet effective to fully detach the sheet from said coating. 13. The method of claim 1, including the step of providing an optical flat body adjacent the face of said sheet remote from said coating. 14. The method of claim 1, wherein said curing step comprises thermally curing said surface coating. 15. The method of claim 14, wherein said thermally curing is accomplished via infrared heating light.

이 특허에 인용된 특허 (34)

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Eugene P. Marsh, Planarization of non-planar surfaces in device fabrication.
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Marsh Eugene P., Planarization of non-planar surfaces in device fabrication.
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