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KR100935754B1 - Semiconductor wafer chuck of a process chamber - Google Patents

Semiconductor wafer chuck of a process chamber Download PDF

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Publication number
KR100935754B1
KR100935754B1 KR1020070133752A KR20070133752A KR100935754B1 KR 100935754 B1 KR100935754 B1 KR 100935754B1 KR 1020070133752 A KR1020070133752 A KR 1020070133752A KR 20070133752 A KR20070133752 A KR 20070133752A KR 100935754 B1 KR100935754 B1 KR 100935754B1
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KR
South Korea
Prior art keywords
wafer
chuck
clamp ring
line contact
process chamber
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KR1020070133752A
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Korean (ko)
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KR20090066128A (en
Inventor
김윤조
심주영
성대철
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주식회사 동부하이텍
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Priority to KR1020070133752A priority Critical patent/KR100935754B1/en
Publication of KR20090066128A publication Critical patent/KR20090066128A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
    • H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
    • H01L21/68721—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by edge clamping, e.g. clamping ring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
    • H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
    • H01L21/687—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches
    • H01L21/68714—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
    • H01L21/68742—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by a lifting arrangement, e.g. lift pins

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Abstract

본 발명은 프로세스 챔버의 웨이퍼 척에 관한 것으로서, 반도체 소자의 제조용 프로세스 챔버에 설치되는 웨이퍼 척에 있어서, 프로세스 챔버 내측에 설치되며, 웨이퍼가 안착되기 위한 안착면을 가지는 척과, 척의 상측에서 승강하도록 설치되는 클램프 링과, 클램프 링을 승강시키는 승강수단과, 클램프 링의 하측에 마련되며, 클램프 링의 하강시 웨이퍼의 상단 모서리에 선접촉되어 웨이퍼를 고정시키는 선접촉 고정수단을 포함한다. 따라서, 본 발명은 척에 웨이퍼를 고정시 웨이퍼의 상단 모서리를 선접촉에 의해 고정시킴으로써 웨이퍼의 에지 부분에 대한 손실을 줄이고, 웨이퍼의 고정을 위해 웨이퍼에 가해지는 충격이나 힘을 최소화함으로써 웨이퍼에 형성된 패턴에 영향을 미치지 않도록 함으로써 수율을 증대시키는 효과를 가지고 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wafer chuck of a process chamber, comprising: a wafer chuck installed in a process chamber for manufacturing a semiconductor device, the wafer chuck being installed inside the process chamber and having a seating surface on which the wafer is to be seated, and installed to move up and down on the chuck. And a clamp ring, a lifting means for raising and lowering the clamp ring, and a line contact fixing means provided at a lower side of the clamp ring and being in line contact with the upper edge of the wafer when the clamp ring is lowered. Accordingly, the present invention reduces the loss to the edge portion of the wafer by fixing the upper edge of the wafer by line contact when fixing the wafer to the chuck, and formed on the wafer by minimizing the impact or force applied to the wafer for fixing the wafer. It has the effect of increasing the yield by not affecting the pattern.

척, 클램프 링, 승강수단, 선접촉 부재, 탄성부재 Chuck, Clamp Ring, Lifting Means, Line Contact Member, Elastic Member

Description

프로세스 챔버의 웨이퍼 척{Semiconductor wafer chuck of a process chamber}Semiconductor wafer chuck of a process chamber

본 발명은 척에 웨이퍼를 고정시 웨이퍼의 상단 모서리를 선접촉에 의해 고정시킴으로써 웨이퍼의 에지 부분에 대한 손실을 줄이고, 웨이퍼가 고정되는 과정에서 손상되는 것을 방지하는 프로세스 챔버의 웨이퍼 척에 관한 것이다.The present invention relates to a wafer chuck in a process chamber that reduces the loss of the edge portion of the wafer by preventing the wafer from being fixed by fixing the top edge of the wafer by line contact when securing the wafer to the chuck.

일반적으로, 반도체 소자는 노광공정, 확산공정, 식각공정, 화학기상증착공정 등 다양한 단위 공정에 의해 제조되는데, 이러한 단위 공정을 진행시 밀폐된 용기인 프로세스 챔버(process) 내에서 이루어지고, 프로세스 챔버 내에 웨이퍼를 고정시키기 위한 수단으로 웨이퍼 척이 사용된다.In general, semiconductor devices are manufactured by various unit processes, such as an exposure process, a diffusion process, an etching process, and a chemical vapor deposition process, which are performed in a process chamber, which is a closed container, during the process. A wafer chuck is used as a means for securing a wafer in it.

이러한 웨이퍼 척은 웨이퍼를 고정시키는 방식에 따라 기계식 척(mechanical chuck), 진공 척(vacuum chuck), 그리고 정전기 척(electrostatic chuck) 등 다양한 방식이 있으며, 기계식 척은 클램프(clamp)를 사용하여 웨이퍼의 에지를 기계적으로 가압함으로써 웨이퍼를 고정시키는 척을 말하고, 진공 척은 진공으로 웨이퍼를 고정시키는 척을 말하며, 정전기 척이란 정전력을 이용하여 웨이퍼를 고정시키 는 척을 말한다.Such wafer chucks have various methods such as mechanical chucks, vacuum chucks, and electrostatic chucks according to the method of fixing the wafers. The chuck refers to a chuck that fixes the wafer by mechanically pressing the edges, the vacuum chuck refers to a chuck that fixes the wafer with a vacuum, and the electrostatic chuck refers to a chuck that fixes the wafer using electrostatic force.

종래의 웨이퍼 척 중에서 기계식 척을 첨부된 도면을 참조하여 설명하면 다음과 같다.Referring to the accompanying drawings, a mechanical chuck of a conventional wafer chuck is as follows.

도 1은 종래의 기술에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이다. 도시된 바와 같이, 종래의 기술에 따른 프로세스 챔버의 웨이퍼 척(10)은 프로세스 챔버(1) 내측에 설치됨과 아울러 상면에 웨이퍼(W)가 안착되는 척(11)과, 척(11)의 상측에 승강하도록 설치됨과 아울러 하강시 웨이퍼(W)의 에지 부분에 면접촉되는 클램프 링(12)과, 클램프 링(12)을 승강시키는 승강수단(13)을 포함한다.1 is a cross-sectional view illustrating a wafer chuck of a process chamber according to the prior art. As shown, the wafer chuck 10 of the process chamber according to the related art is installed inside the process chamber 1 and the chuck 11 on which the wafer W is seated on the upper surface thereof, and the upper side of the chuck 11. It is installed so as to lift up and down, the clamp ring 12 which is in surface contact with the edge portion of the wafer (W) when lifting, and lifting means 13 for lifting the clamp ring 12.

이와 같은 종래의 프로세스 챔버의 웨이퍼 척(10)은 승강수단(13)의 구동에 의해 클램프 링(12)이 상승하여 척(11)의 상면으로부터 이격되면, 웨이퍼(W)가 프로세스 챔버(1) 내측으로 로딩되어 척(11)의 상면에 안착되고, 승강수단(13)의 구동에 의해 클램프 링(12)이 하강하여 척(11)에 안착된 웨이퍼(W)의 에지에 면접촉되어 웨이퍼(W)를 고정시킨다.In the wafer chuck 10 of the conventional process chamber, when the clamp ring 12 is raised by the driving of the elevating means 13 and spaced apart from the upper surface of the chuck 11, the wafer W is processed in the process chamber 1. It is loaded inward and seated on the upper surface of the chuck 11, and the clamp ring 12 is lowered by the driving of the elevating means 13 to be in surface contact with the edge of the wafer W seated on the chuck 11. Secure W).

상기한 바와 같이, 종래의 기술에 따른 프로세스 챔버의 웨이퍼 척은 클램프 링이 웨이퍼를 가압시 웨이퍼의 에지 부분과 면접촉됨으로써 웨이퍼에서 테두리로부터 내측으로 2.5mm 정도에 걸친 영역을 사용할 수 없게 되며, 웨이퍼에 면접촉되어 가해지는 압력에 의해 웨이퍼에 형성된 패턴에 악영향을 미치게 됨으로써 수율을 저하시키는 문제점을 가지고 있었다.As described above, the wafer chuck of the process chamber according to the prior art is unable to use an area of about 2.5 mm inward from the edge of the wafer because the clamp ring is in surface contact with the edge portion of the wafer when pressing the wafer. The pressure exerted on the surface contact adversely affects the pattern formed on the wafer, thereby lowering the yield.

본 발명은 척에 웨이퍼를 고정시 웨이퍼의 상단 모서리를 선접촉에 의해 고정시킴으로써 웨이퍼의 에지 부분에 대한 손실을 줄이고, 웨이퍼가 고정되는 과정에서 손상되는 것을 방지한다.The present invention fixes the top edge of the wafer by line contact when fixing the wafer to the chuck, thereby reducing the loss of the edge portion of the wafer and preventing the wafer from being damaged during the fixing process.

본 발명에 따른 프로세스 챔버의 웨이퍼 척은 반도체 소자의 제조용 프로세스 챔버에 설치되는 웨이퍼 척에 있어서, 프로세스 챔버 내측에 설치되며, 웨이퍼가 안착되기 위한 안착면을 가지는 척과, 척의 상측에서 승강하도록 설치되는 클램프 링과, 클램프 링을 승강시키는 승강수단과, 클램프 링의 하측에 마련되며, 클램프 링의 하강시 웨이퍼의 상단 모서리에 선접촉되어 웨이퍼를 고정시키는 선접촉 고정수단을 포함한다.The wafer chuck of the process chamber according to the present invention is a wafer chuck installed in a process chamber for manufacturing a semiconductor device, which is installed inside the process chamber and has a seating surface on which the wafer is to be seated, and a clamp installed to elevate from the upper side of the chuck. And a ring, an elevating means for elevating the clamp ring, and a line contact fixing means provided at the lower side of the clamp ring and being in line contact with the upper edge of the wafer when the clamp ring is lowered.

본 발명은 척에 웨이퍼를 고정시 웨이퍼의 상단 모서리를 선접촉에 의해 고정시킴으로써 웨이퍼의 에지 부분에 대한 손실을 줄이고, 웨이퍼의 고정을 위해 웨 이퍼에 가해지는 충격이나 힘을 최소화함으로써 웨이퍼에 형성된 패턴에 영향을 미치지 않도록 함으로써 수율을 증대시키는 효과를 가지고 있다.The present invention is a pattern formed on the wafer by reducing the loss to the edge portion of the wafer by fixing the upper edge of the wafer by line contact when fixing the wafer to the chuck, and minimizes the impact or force applied to the wafer for fixing the wafer It has the effect of increasing the yield by not affecting.

본 발명은, 프로세스 챔버 내측에 설치되는 척에 안착된 웨이퍼를 승강수단에 의해 하강하는 클램프 링에 마련되는 선접촉 고정수단으로 웨이퍼의 상단 모서리를 선접촉에 의해 고정시킴으로써 웨이퍼의 에지 부분에 대한 활용성을 높임과 아울러 웨이퍼에 고정을 위해 가해지는 충격이 힘을 최소화한다.The present invention utilizes an edge portion of a wafer by fixing the upper edge of the wafer by line contact with a line contact fixing means provided on a clamp ring descending by a lifting means for mounting the wafer mounted on the chuck installed inside the process chamber. In addition to enhancing the properties, the impact applied to the wafer to minimize the force.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다. 아울러 본 발명을 설명함에 있어서, 관련된 공지 구성 또는 기능에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

도 2는 본 발명의 제 1 실시예에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이다. 도시된 바와 같이, 본 발명의 제 1 실시예에 따른 프로세스 챔버의 웨이퍼 척(100)은 RTP(Rapid thermal process)나 에칭(etching) 등 반도체 소자를 제조하기 위한 공정을 진행하는 프로세스 챔버(1) 내측에 설치되는 척(110)과, 척(110)의 상측에 설치되는 클램프 링(120)과, 클램프 링(120)을 승강시키는 승강수단(130)과, 클램프 링(120)에 마련되는 선접촉 고정수단(140)을 포함한다.2 is a cross-sectional view showing a wafer chuck of a process chamber according to a first embodiment of the present invention. As shown, the wafer chuck 100 of the process chamber according to the first embodiment of the present invention is a process chamber 1 for performing a process for manufacturing a semiconductor device, such as rapid thermal process (RTP) or etching (etching) A line provided on the chuck 110 installed inside, the clamp ring 120 provided on the upper side of the chuck 110, elevating means 130 for elevating the clamp ring 120, and the clamp ring 120. And a contact fixing means 140.

척(110)은 프로세스 챔버(1)의 내측에 설치되며, 웨이퍼(W)가 공정을 수행하기 위하여 프로세스 챔버(1) 내측으로 로딩시 안착되기 위한 안착면(111)을 가진 다.The chuck 110 is installed inside the process chamber 1, and has a seating surface 111 to be seated when the wafer W is loaded into the process chamber 1 to perform a process.

클램프 링(120)은 다양한 형상의 링으로 이루어지고, 바람직하게는 웨이퍼(W)의 에지에 대응되는 원형 링 형상을 가지며, 척(110)의 상측에서 승강수단(130)에 의해 승강하도록 설치된다. Clamp ring 120 is made of a ring of various shapes, preferably has a circular ring shape corresponding to the edge of the wafer (W), is installed to be elevated by the lifting means 130 on the upper side of the chuck 110. .

승강수단(130)은 모터 등의 구동력을 직선 운동으로 전환하거나 실린더에서 피스톤 로드의 왕복 직선 운동을 이용하도록 구성될 수 있으며, 클램프 링(120)의 양측에 하방을 향하도록 고정되는 승강부재(131)를 승강시킴으로써 클램프 링(120)도 함께 승강되도록 한다.The elevating means 130 may be configured to convert a driving force of a motor or the like into a linear motion or to use a reciprocating linear motion of the piston rod in the cylinder, and the elevating member 131 fixed downward on both sides of the clamp ring 120. ), The clamp ring 120 is also lifted together.

승강부재(131)는 한 쌍으로 이루어져서 클램프 링(120)의 양측에 고정됨으로써 이들 사이로 웨이퍼(W)가 웨이퍼 트랜스퍼에 의해 출입할 수 있도록 함으로써 웨이퍼(W)가 척(110)의 안착면(111)으로 로딩되거나 안착면(111)으로부터 언로딩될 수 있는 이동 경로에서 장애가 되지 않도록 한다.The elevating member 131 is formed in a pair to be fixed to both sides of the clamp ring 120 to allow the wafer W to enter and exit by the wafer transfer therebetween, so that the wafer W is seated on the chuck 110. ) So that it is not an obstacle in the movement path that can be loaded into or unloaded from the seating surface 111.

선접촉 고정수단(140)은 클램프 링(120)의 하측에 마련되며, 클램프 링(120)의 하강시 웨이퍼(W)의 상단 모서리에 선접촉됨으로써 웨이퍼(W)가 척(110) 상에 고정되도록 한다.The line contact fixing means 140 is provided below the clamp ring 120, and the wafer W is fixed on the chuck 110 by being in line contact with the upper edge of the wafer W when the clamp ring 120 descends. Be sure to

선접촉 고정수단(140)은 본 실시예에서 클램프 링(120)의 하면에 외측으로 갈수록 하향 경사지도록 형성되는 선접촉부임이 바람직하다. 따라서, 도 3에 도시된 바와 같이, 클램프 링(120)이 하강시 선접촉부의 경사진 부분이 웨이퍼(W)의 상단 모서리를 눌려서 웨이퍼(W)를 고정시킨다. The line contact fixing means 140 is preferably a line contact portion formed to be inclined downward toward the outside on the lower surface of the clamp ring 120 in this embodiment. Therefore, as shown in FIG. 3, when the clamp ring 120 descends, the inclined portion of the line contact portion presses the upper edge of the wafer W to fix the wafer W. As shown in FIG.

선접촉 고정수단(140)인 선접촉부는 클램프 링(120)의 하면을 따라 연속적으 로 형성됨으로써 링 형상으로 이루어질 수 있으며, 이와 달리, 클램프 링(120)의 하면에 불연속적으로 형성됨으로써 클램프 링(120)의 하면을 따라 다수로 배열되도록 구성될 수 있다.The line contact portion, which is the line contact fixing means 140, may be formed in a ring shape by being continuously formed along the lower surface of the clamp ring 120. Alternatively, the clamp ring 120 may be discontinuously formed on the lower surface of the clamp ring 120. It may be configured to be arranged in plurality along the lower surface of the (120).

도 4는 본 발명의 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이다. 도시된 바와 같이, 본 발명의 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척(200)은 제 1 실시예와 마찬가지로, 프로세스 챔버(1) 내측에 설치되는 척(210)과, 척(210)의 상측에 설치되는 클램프 링(220)과, 클램프 링(220)을 승강시키는 승강수단(230)과, 클램프 링(220)에 마련되는 선접촉 고정수단(240)을 포함하며, 척(210), 클램프 링(220) 및 승강수단(230)은 제 1 실시예의 척(110), 클램프 링(120) 및 승강수단(130)과 동일하므로 그 설명을 생략하기로 하겠다.4 is a cross-sectional view illustrating a wafer chuck of a process chamber according to a second embodiment of the present invention. As shown, the wafer chuck 200 of the process chamber according to the second embodiment of the present invention, like the first embodiment, the chuck 210 installed inside the process chamber 1, and the chuck 210 The clamp ring 220 is installed on the upper side, the lifting means 230 for elevating the clamp ring 220, and the line contact fixing means 240 provided in the clamp ring 220, the chuck 210, Since the clamp ring 220 and the elevating means 230 are the same as the chuck 110, the clamp ring 120 and the elevating means 130 of the first embodiment, description thereof will be omitted.

선접촉 고정수단(240)은 도 5에 도시된 바와 같이, 클램프 링(220)의 하면을 따라 다수로 배열되도록 마련되고, 각각은 클램프 링(220)의 하면에 상하로 이동하도록 설치됨과 아울러 웨이퍼(W)의 상단 모서리에 접하는 측이 외측으로 갈수록 하향 경사지도록 형성되는 선접촉 부재(241)와, 선접촉 부재(241)가 척(210)을 향하여 돌출되도록 탄성력을 제공하는 탄성부재(242)를 포함한다.As shown in FIG. 5, the line contact fixing means 240 is provided to be arranged in plurality along the lower surface of the clamp ring 220, and each of the line contact fixing means 240 is installed to move up and down on the lower surface of the clamp ring 220. The line contact member 241 is formed to be inclined downward toward the outside toward the outer side of the upper end of the (W) and the elastic member 242 which provides an elastic force so that the line contact member 241 protrudes toward the chuck 210. It includes.

선접촉 부재(241)는 웨이퍼(W)의 상단 모서리에 접하는 측이 웨이퍼(W)의 외측으로 갈수록 하향 경사지도록 형성되는 형상으로 다양하게 구성될 수 있으며, 이를 만족하기 위하여 본 실시예에서처럼 하방을 향하는 콘(Corn) 형상을 가지는 것이 바람직하며, 상단에 형성되는 승강축(241a)이 클램프 링(220)에 상하로 관통하 도록 형성되는 홀(미도시)에 삽입되어 상하로 슬라이딩 가능하도록 설치되고, 승강축(241a)에 탄성부재(242)가 설치된다.The line contact member 241 may be variously configured in a shape in which the side contacting the upper edge of the wafer W is inclined downward toward the outside of the wafer W. In order to satisfy this, the line contact member 241 may have a downward direction. It is preferable to have a cone (corn) facing, and the lifting shaft 241a formed at the upper end is inserted into a hole (not shown) formed to penetrate up and down through the clamp ring 220 is installed to be slidable up and down The elastic member 242 is installed on the lifting shaft 241a.

승강축(241a)은 클램프 링(220)에 상하로 슬라이딩 가능하도록 설치되기 위하여 클램프 링(220)의 홀을 통해서 상측으로 돌출되는 끝단에 나사 체결 또는 억지 끼워지는 고정부재(241b)가 결합됨으로써 선접촉 부재(241)가 하방으로 이탈되지 않는 상태에서 선접촉 부재(241)의 상하 이동을 가이드한다.The lifting shaft 241a is coupled to the clamping member 220 so that the clamping member 220 is slidable up and down. The vertical movement of the line contact member 241 is guided in a state where the contact member 241 is not separated downward.

탄성부재(242)는 일예로 코일 스프링으로 이루어지고, 승강축(241)에 삽입됨으로써 클램프 링(220)의 하면으로부터 선접촉 부재(241)로 탄성력을 제공하며, 이로 인해 선접촉 부재(241)가 웨이퍼(W)의 상단 모서리를 탄성 지지하도록 한다.The elastic member 242 is made of, for example, a coil spring, and is inserted into the lifting shaft 241 to provide an elastic force from the lower surface of the clamp ring 220 to the line contact member 241, thereby the line contact member 241 To elastically support the top edge of the wafer (W).

한편, 도 6에 도시된 바와 같이, 선접촉 부재(241)가 비교적 얇은 두께를 가지는 웨이퍼(W)를 클램핑하여야 하기 때문에 탄성부재(242)의 탄성력에 의해 하방으로 이동시 척(210)의 안착면(211)과 간섭을 일으킬 수 있으므로 이를 방지하기 위하여 척(210)은 선접촉 부재(241)와 대응되는 위치에 선접촉 부재(241)가 삽입되기 위한 삽입홈(212)이 형성된다.On the other hand, as shown in Figure 6, since the line contact member 241 has to clamp the wafer (W) having a relatively thin thickness, the seating surface of the chuck 210 when moved downward by the elastic force of the elastic member 242 Since it may cause interference with the 211, the chuck 210 has an insertion groove 212 for inserting the line contact member 241 at a position corresponding to the line contact member 241.

이와 같은 구성을 가지는 본 발명에 따른 프로세스 챔버의 웨이퍼 척(100,200)에 대한 작동 및 작용을 설명하면 다음과 같다. Referring to the operation and operation of the wafer chuck 100,200 of the process chamber according to the present invention having such a configuration as follows.

도 2 및 도 4에 도시된 바와 같이, 승강수단(130,230)의 구동에 의해 승강부재(131)가 상승하여 클램프 링(120,220)이 척(110,210)의 안착면(111,211)으로부터 이격된 상태에서 웨이퍼 트랜스퍼에 의해 웨이퍼(W)가 프로세스 챔버(1) 내측으로 로딩되어 승강부재(131) 사이를 통해서 척(110,210)의 안착면(111,211)에 안착되 면, 승강수단(130,230)에 의해 승강부재(131)가 클램프 링(120,220)과 함께 하강한다.As shown in FIGS. 2 and 4, the lifting members 131 are raised by the driving of the lifting means 130 and 230 so that the clamp rings 120 and 220 are separated from the seating surfaces 111 and 211 of the chucks 110 and 210. When the wafer W is loaded into the process chamber 1 by the transfer and is seated on the seating surfaces 111 and 211 of the chucks 110 and 210 through the elevating members 131, the elevating members 130 and 230 may be used. 131 descends with clamp rings 120 and 220.

클램프 링(120,220)이 하강하면, 도 3 및 도 6에 도시된 바와 같이, 선접촉 고정수단(140,240)의 경사진 부분이 웨이퍼(W)의 상단 모서리를 하방으로 가압하여 웨이퍼(W)를 척(110,210)의 안착면(111,211)에 고정시킨다.When the clamp rings 120 and 220 are lowered, as shown in FIGS. 3 and 6, the inclined portions of the line contact fixing means 140 and 240 press the upper edge of the wafer W downward to chuck the wafer W. It is fixed to the mounting surface (111,211) of (110,210).

이 때, 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척(200)의 경우 콘 형상의 선접촉 부재(241)가 탄성부재(242)의 탄성력으로 웨이퍼(W)를 고정시킴으로써 웨이퍼(W)에 가해지는 충격이나 힘을 최소화하도록 하며, 선접촉 부재(241)가 하강시 척(210)의 안착면(211)에 형성된 삽입홈(212) 내측으로 삽입됨으로써 선접촉 부재(241)와 척(210)간의 간섭을 방지한다.At this time, in the case of the wafer chuck 200 of the process chamber according to the second embodiment, the cone-shaped line contact member 241 is applied to the wafer W by fixing the wafer W with the elastic force of the elastic member 242. Loss of impact and force is minimized, and the line contact member 241 is inserted into the insertion groove 212 formed in the seating surface 211 of the chuck 210 when the line contact member 241 and the chuck 210 are lowered. To prevent interference.

한편, 프로세스 챔버(1) 내에서 웨이퍼(W)에 대한 공정을 마치면, 승강수단(130,230)의 구동에 의해 클램프 링(120,220)이 상승함으로써 선접촉 고정수단(140,240)이 웨이퍼(W)로부터 상측으로 이격되어 웨이퍼(W)가 언로딩될 수 있도록 한다.On the other hand, when the process for the wafer (W) in the process chamber 1 is finished, the clamp ring (120, 220) is raised by the driving of the elevating means (130, 230), the line contact fixing means (140,240) is the upper side from the wafer (W) Spaced apart so that the wafer W can be unloaded.

이상과 같이, 본 발명의 바람직한 실시예들에 따르면, 척에 웨이퍼를 고정시 웨이퍼의 상단 모서리를 선접촉에 의해 고정시키고, 이로 인해 종래에서 웨이퍼를 면접촉에 의해 고정함으로써 면접촉된 웨이퍼의 에지 부분, 예컨대, 테두리에서 내측으로 2.5mm 이내의 영역에 대해 발생되는 손실을 줄여서 에지 부분을 활용할 수 있도록 하며, 웨이퍼의 고정을 위해 웨이퍼에 가해지는 충격이나 힘을 최소화함으로써 웨이퍼에 형성된 패턴에 영향을 미치지 않도록 함과 아울러 웨이퍼의 손상을 방지함으로써 수율 및 장비 가동률을 증대시킨다.As described above, according to the preferred embodiments of the present invention, when the wafer is fixed to the chuck, the upper edge of the wafer is fixed by line contact, and thus, the edge of the surface contacted wafer by conventionally fixing the wafer by surface contact. Reduces the loss incurred for a portion, for example, an area within 2.5mm of the edge inward, to utilize the edge portion, and minimizes the impact or force applied to the wafer to fix the wafer, thereby affecting the pattern formed on the wafer. It also increases yield and equipment utilization by preventing wafer damage and preventing wafer damage.

이상에서와 같이, 본 발명의 상세한 설명에서 구체적인 실시예에 관해 설명하였으나, 본 발명의 기술이 당업자에 의하여 용이하게 변형 실시될 가능성이 자명하며, 이러한 변형된 실시예들은 본 발명의 특허청구범위에 기재된 기술사상에 포함된다할 것이다.As described above, specific embodiments have been described in the detailed description of the present invention, but it is obvious that the technology of the present invention can be easily modified by those skilled in the art, and such modified embodiments are defined in the claims of the present invention. It will be included in the technical spirit described.

도 1은 종래의 기술에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이고,1 is a cross-sectional view showing a wafer chuck of a process chamber according to the prior art,

도 2는 본 발명의 제 1 실시예에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이고,2 is a cross-sectional view showing a wafer chuck of a process chamber according to a first embodiment of the present invention,

도 3은 본 발명의 제 1 실시예에 따른 프로세스 챔버의 웨이퍼 척이 웨이퍼를 클램핑한 상태를 도시한 단면도이고,3 is a cross-sectional view illustrating a state in which a wafer chuck of a process chamber according to a first embodiment of the present invention clamps a wafer;

도 4는 본 발명의 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척을 도시한 단면도이고,4 is a cross-sectional view showing a wafer chuck of a process chamber according to a second embodiment of the present invention,

도 5는 본 발명의 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척을 도시한 평면도이고,5 is a plan view illustrating a wafer chuck of a process chamber according to a second embodiment of the present invention;

도 6은 본 발명의 제 2 실시예에 따른 프로세스 챔버의 웨이퍼 척이 웨이퍼를 클램핑한 상태를 도시한 단면도이다.6 is a cross-sectional view illustrating a state in which a wafer chuck of a process chamber according to a second embodiment of the present invention clamps a wafer.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

110,210 : 척 111,211 : 안착면110,210: Chuck 111,211: Seating surface

120,220 : 클램프 링 130,230 : 승강수단120,220: clamp ring 130,230: lifting means

131 : 승강부재 140,240 : 선접촉 고정수단131: lifting member 140,240: line contact fixing means

212 : 삽입홈 241 : 선접촉 부재212 insertion groove 241 wire contact member

241a : 승강축 241b : 고정부재241a: lifting shaft 241b: holding member

242 : 탄성부재 W : 웨이퍼242: elastic member W: wafer

Claims (5)

반도체 소자의 제조용 프로세스 챔버에 설치되는 웨이퍼 척에 있어서,In the wafer chuck provided in the process chamber for manufacturing a semiconductor device, 상기 프로세스 챔버 내측에 설치되며, 웨이퍼가 안착되기 위한 안착면을 가지는 척과,A chuck installed inside the process chamber and having a seating surface for seating the wafer; 상기 척의 상측에서 승강하도록 설치되는 클램프 링과,A clamp ring installed to move up and down on the chuck; 상기 클램프 링을 승강시키는 승강수단과,Elevating means for elevating the clamp ring; 상기 클램프 링의 하측에 마련되며, 상기 클램프 링의 하강시 웨이퍼의 상단 모서리에 선접촉되어 웨이퍼를 고정시키는 선접촉 고정수단을 포함하고,It is provided on the lower side of the clamp ring, and includes a line contact fixing means for preliminary contact with the upper edge of the wafer when the clamp ring is lowered to fix the wafer, 상기 선접촉 고정수단은,The line contact fixing means, 상기 클램프 링의 하면을 따라 다수로 마련되고, 각각은, It is provided in plurality along the lower surface of the clamp ring, each of which, 상기 클램프 링의 하면에 상하로 이동하도록 설치되며, 상기 웨이퍼의 상단 모서리에 접하는 측이 외측으로 갈수록 하향 경사지도록 형성되는 선접촉 부재와,It is installed to move up and down on the lower surface of the clamp ring, the line contact member is formed so that the side in contact with the upper edge of the wafer is inclined downward toward the outside, 상기 선접촉 부재가 상기 척을 향하여 돌출되도록 탄성력을 제공하는 탄성부재를 포함하며,It includes an elastic member for providing an elastic force so that the line contact member protrudes toward the chuck, 상기 선접촉 부재는,The line contact member, 하방을 향하는 콘 형상으로 이루어지고, 상단에 형성되는 승강축이 상기 클램프 링에 상하로 슬라이딩 가능하도록 설치되며, 상기 승강축에 상기 탄성부재가 설치되는 프로세스 챔버의 웨이퍼 척.The wafer chuck of the process chamber made of a cone shape facing downward, the lifting shaft formed on the upper end is slidable up and down on the clamp ring, the elastic member is installed on the lifting shaft. 삭제delete 삭제delete 삭제delete 제 1 항에 있어서,The method of claim 1, 상기 척은,The chuck is, 상면에 상기 선접촉 부재가 삽입되기 위한 삽입홈이 형성되는 것Insert grooves for forming the line contact member is formed on the upper surface 을 특징으로 하는 프로세스 챔버의 웨이퍼 척.Wafer chuck of the process chamber, characterized in that.
KR1020070133752A 2007-12-18 2007-12-18 Semiconductor wafer chuck of a process chamber KR100935754B1 (en)

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KR1020070133752A KR100935754B1 (en) 2007-12-18 2007-12-18 Semiconductor wafer chuck of a process chamber

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JPH0936211A (en) * 1995-07-24 1997-02-07 Yamaha Corp Clamp ring
JPH11111818A (en) 1997-10-03 1999-04-23 Oki Electric Ind Co Ltd Holding device and holder for wafer
JP2000269310A (en) * 1999-03-15 2000-09-29 Toshiba Corp Semiconductor wafer support device
KR20010039633A (en) * 1999-06-04 2001-05-15 조셉 제이. 스위니 Tapered shadow clamping ring and method to provide improved edge exclusion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0936211A (en) * 1995-07-24 1997-02-07 Yamaha Corp Clamp ring
JPH11111818A (en) 1997-10-03 1999-04-23 Oki Electric Ind Co Ltd Holding device and holder for wafer
JP2000269310A (en) * 1999-03-15 2000-09-29 Toshiba Corp Semiconductor wafer support device
KR20010039633A (en) * 1999-06-04 2001-05-15 조셉 제이. 스위니 Tapered shadow clamping ring and method to provide improved edge exclusion

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