US20050279452A1 - Etching reaction device with protrusions - Google Patents
Etching reaction device with protrusions Download PDFInfo
- Publication number
- US20050279452A1 US20050279452A1 US11/156,275 US15627505A US2005279452A1 US 20050279452 A1 US20050279452 A1 US 20050279452A1 US 15627505 A US15627505 A US 15627505A US 2005279452 A1 US2005279452 A1 US 2005279452A1
- Authority
- US
- United States
- Prior art keywords
- etching
- protrusions
- etching reaction
- reaction device
- reaction chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet etching
- H01L21/67086—Apparatus for fluid treatment for etching for wet etching with the semiconductor substrates being dipped in baths or vessels
Abstract
Description
- The present invention relates to an etching reaction device typically used for etching a wafer such as a semiconductor wafer.
- In a typical process of manufacturing a semiconductor wafer, a film is formed on the semiconductor wafer. If the film is not uniform or a thickness of the film is not according to specifications, the film is generally removed altogether.
- Nowadays, popular etching methods include dry etching methods and wet etching methods. A typical etching reaction device for wet etching is shown in
FIG. 3 . Theetching reaction device 1 uses etching liquid that chemically reacts with the film, whereby the film can be removed. - The
etching reaction device 1 includes anetching reaction chamber 10, an etching liquid transporting pipe 12, an etchingliquid entrance 15, and a plurality ofrollers 16. The etchingliquid entrance 15 is set at a bottom of theetching reaction chamber 10, and is connected with the etching liquid transporting pipe 12. Therollers 16 are set inside theetching reaction chamber 10. - When a
wafer 5 is to be etched by theetching reaction device 1, thewafer 5 is set on therollers 16 such that thewafer 5 can slide along therollers 16. The etching liquid enters theetching reaction chamber 10 through the etching liquid transporting pipe 12 and the etchingliquid entrance 15. The etching liquid reaches thewafer 5, and chemically reacts with the film of thewafer 5. The film of thewafer 5 transforms into another substance, which substance dissolves in the etching liquid. Thus the film is removed from thewafer 5. - The
wafer 5 is set on therollers 16, and the film of thewafer 5 chemically reacts only with etchant in the etching liquid has reached thewafer 5. Thus the concentration of the etching liquid near thewafer 5 is lower than that in other areas of theetching reaction chamber 10. The higher concentration etching liquid in the other areas of theetching reaction chamber 10 travels toward thewafer 5 and replenishes and replaces the lower concentration etching liquid at thewafer 5. That is, higher concentration etching liquid flows until it is blocked by sides of theetching reaction chamber 10, whereupon the higher concentration etching liquid rises toward thewafer 5. Thus circulation of etching liquid occurs because of the convection phenomenon. - However, particularly in cases where the
etching reaction chamber 10 is large, the etching liquid takes a long time to flow from the etchingliquid entrance 15 to the sides of theetching reaction chamber 10. That is, the efficiency of circulation of the etching liquid is low. The etching liquid near thewafer 5 may not be timely replenished and replaced, and so thewafer 5 may not be etched uniformly. - What is needed, therefore, is a new etching reaction device which overcome the above-described problems.
- In one embodiment, an etching reaction device comprises an etching reaction chamber, and a plurality of protrusions arranged on the bottom of the etching reaction chamber.
- The protrusions arranged on the bottom of the etching reaction chamber are provided for redirecting a flow of etching liquid. When the etching liquid flows in the etching reaction chamber, it is blocked by the protrusions and rises toward a wafer. The plural protrusions help plural circulations of etching liquid because of the convection phenomenon. Therefore, the lower concentration etching liquid near the wafer is continuously replenished and replaced by higher concentration etching liquid traveling thereof from the other areas of the etching reaction chamber. Thus it can economize the etching time. And it can quickly complement the concentration of the etching liquid near to the wafer, thus the wafer is etched uniformly. The protrusions can reduce the capability of the etching reaction chamber. Thus, it can economize the etching liquid.
- Other advantages and novel features will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
-
FIG. 1 is a schematic, cross-sectional view of an etching reaction device according to an exemplary embodiment of the present invention, together with a wafer placed therein. -
FIG. 2 is an isometric view of the etching reaction device ofFIG. 1 , but not showing rollers thereof and not showing the wafer. -
FIG. 3 is a schematic, cross-sectional view of a typical etching reaction device, together with a wafer placed therein. - Referring to
FIG. 1 andFIG. 2 , an etching reaction device according to an exemplary embodiment of the present invention is shown. The etching reaction device 3 includes anetching reaction chamber 30, an etchingliquid transport pipe 32, an etchingliquid entrance 35, a plurality ofrollers 36, and a plurality ofprotrusions 301. - The etching
liquid entrance 35 is set at thebottom 39 of theetching reaction chamber 30, and is connected with the etchingliquid transporting pipe 32. The plurality ofrollers 16 is set inside theetching reaction chamber 30. The plurality ofprotrusions 301 is set on thebottom 39 of theetching reaction chamber 30. - When a
wafer 7 is etched by the etching reaction device 3. Thewafer 7 is set on therollers 36, and can slide along therollers 36. The etching liquid enters theetching reaction chamber 30 through the etching liquid transportingpipe 32 and the etchingliquid entrance 35. The etching liquid reaches thewafer 7, and chemically reacts with a film of thewafer 7. The film of thewafer 7 is transformed into another substance, which substance can be dissolved in the etching liquid. Thus the film can be removed from thewafer 7. - The film of the
wafer 7 chemically reacts with etchant in the etching liquid which has reached thewafer 7. Thus the concentration of the etching liquid near thewafer 7 is lower than that in other areas of theetching reaction chamber 30. The higher concentration etching liquid in the other areas of theetching reaction chamber 30 travels toward thewafer 7 and replenishes and replaces the lower concentration etching liquid at thewafer 7. - The
protrusions 301 arranged on thebottom 39 of theetching reaction chamber 30 are provided for redirecting a flow of the etching liquid. When the etching liquid flows in theetching reaction chamber 30, it is blocked by theprotrusions 301 and rises toward thewafer 7. Theplural protrusions 301 help generate plural circulations of etching liquid, because of the convection phenomenon. A distance between eachprotrusion 301 and the etchingliquid entrance 35 is shorter than a distance between thecorresponding side 33 of theetching reaction chamber 30 and the etchingliquid entrance 35. Thus the etching liquid flowing from the etchingliquid entrance 35 flows to eachprotrusion 301 quicker than it does to thecorresponding side 33. This can reduce the time required to etch thewafer 7. In addition, as described above, the lower concentration etching liquid near thewafer 7 is continuously replenished and replaced by higher concentration etching liquid traveling thereto from the other areas of theetching reaction chamber 30. This helps ensure that thewafer 7 is etched uniformly. - Because the cubage of the
etching reaction chamber 30 is aptotic. Theprotrusions 301 on thebottom 39 of theetching reaction chamber 30 reduce the capacity of theetching reaction chamber 30 while simultaneously providing for improved flow of the etching liquid. Accordingly, the amount of etching liquid required is reduced. That is, the etching reaction device 3 can economize on the use of etching liquid. - In the exemplary embodiment, the
protrusions 301 are made of polyvinylidene difluoride, and are tapered in cross-section. Theprotrusions 301 can, for example, alternatively be step-shaped, columnar, triangular in cross-section, or rectangular in cross-section. - It is to be further understood that even though numerous characteristics and advantages of various embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims (17)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW93117730 | 2004-06-18 | ||
TW093117730A TW200601439A (en) | 2004-06-18 | 2004-06-18 | Etching chamber |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050279452A1 true US20050279452A1 (en) | 2005-12-22 |
Family
ID=35479368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/156,275 Abandoned US20050279452A1 (en) | 2004-06-18 | 2005-06-17 | Etching reaction device with protrusions |
Country Status (2)
Country | Link |
---|---|
US (1) | US20050279452A1 (en) |
TW (1) | TW200601439A (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967777A (en) * | 1988-07-29 | 1990-11-06 | Texas Instruments Incorporated | Apparatus for treating substrates with a liquid |
US5327921A (en) * | 1992-03-05 | 1994-07-12 | Tokyo Electron Limited | Processing vessel for a wafer washing system |
US5366557A (en) * | 1990-06-18 | 1994-11-22 | At&T Bell Laboratories | Method and apparatus for forming integrated circuit layers |
US5579792A (en) * | 1993-02-12 | 1996-12-03 | International Business Machines Corporation | Apparatus for uniform cleaning of wafers using megasonic energy |
US5794299A (en) * | 1996-08-29 | 1998-08-18 | Ontrak Systems, Inc. | Containment apparatus |
US6017398A (en) * | 1996-10-28 | 2000-01-25 | Forward Technology Industries | Immersed metal cleaning by subjecting object to natural resonant frequency |
US20020166569A1 (en) * | 2001-05-10 | 2002-11-14 | Speedfam-Ipec Corporation | Method and apparatus for semiconductor wafer cleaning |
US20040134290A1 (en) * | 2002-12-31 | 2004-07-15 | Kyung-Su Chae | Apparatus for inspecting rubbing inferiority of alignment film of liquid crystal display device |
US20060037698A1 (en) * | 2004-08-19 | 2006-02-23 | Kennedy Timothy J | Systems and methods for processing microfeature workpieces |
-
2004
- 2004-06-18 TW TW093117730A patent/TW200601439A/en unknown
-
2005
- 2005-06-17 US US11/156,275 patent/US20050279452A1/en not_active Abandoned
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4967777A (en) * | 1988-07-29 | 1990-11-06 | Texas Instruments Incorporated | Apparatus for treating substrates with a liquid |
US5366557A (en) * | 1990-06-18 | 1994-11-22 | At&T Bell Laboratories | Method and apparatus for forming integrated circuit layers |
US5327921A (en) * | 1992-03-05 | 1994-07-12 | Tokyo Electron Limited | Processing vessel for a wafer washing system |
US5579792A (en) * | 1993-02-12 | 1996-12-03 | International Business Machines Corporation | Apparatus for uniform cleaning of wafers using megasonic energy |
US5794299A (en) * | 1996-08-29 | 1998-08-18 | Ontrak Systems, Inc. | Containment apparatus |
US6017398A (en) * | 1996-10-28 | 2000-01-25 | Forward Technology Industries | Immersed metal cleaning by subjecting object to natural resonant frequency |
US20020166569A1 (en) * | 2001-05-10 | 2002-11-14 | Speedfam-Ipec Corporation | Method and apparatus for semiconductor wafer cleaning |
US20040134290A1 (en) * | 2002-12-31 | 2004-07-15 | Kyung-Su Chae | Apparatus for inspecting rubbing inferiority of alignment film of liquid crystal display device |
US20060037698A1 (en) * | 2004-08-19 | 2006-02-23 | Kennedy Timothy J | Systems and methods for processing microfeature workpieces |
Also Published As
Publication number | Publication date |
---|---|
TW200601439A (en) | 2006-01-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INNOLUX DISPLAY CORP., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GAU, SHENG-CHOU;HUANG, CHANG KUEI;OU, CHEN-HSIEN;AND OTHERS;REEL/FRAME:016715/0831 Effective date: 20050615 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: CHIMEI INNOLUX CORPORATION, TAIWAN Free format text: CHANGE OF NAME;ASSIGNOR:INNOLUX DISPLAY CORPORATION;REEL/FRAME:032672/0877 Effective date: 20100330 Owner name: INNOLUX CORPORATION, TAIWAN Free format text: CHANGE OF NAME;ASSIGNOR:CHIMEI INNOLUX CORPORATION;REEL/FRAME:032672/0897 Effective date: 20121219 |