WO2008114466A1 - シリコン角柱およびその製造法 - Google Patents
シリコン角柱およびその製造法 Download PDFInfo
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- WO2008114466A1 WO2008114466A1 PCT/JP2007/060298 JP2007060298W WO2008114466A1 WO 2008114466 A1 WO2008114466 A1 WO 2008114466A1 JP 2007060298 W JP2007060298 W JP 2007060298W WO 2008114466 A1 WO2008114466 A1 WO 2008114466A1
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- silicon
- alignment
- anisotropic etching
- etching
- plane
- Prior art date
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- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 143
- 239000010703 silicon Substances 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 96
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 140
- 238000005530 etching Methods 0.000 claims abstract description 122
- 239000000758 substrate Substances 0.000 claims abstract description 18
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- 235000012431 wafers Nutrition 0.000 description 25
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 16
- 238000010586 diagram Methods 0.000 description 13
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- 239000010410 layer Substances 0.000 description 5
- 150000003376 silicon Chemical class 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910005091 Si3N Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000001505 atmospheric-pressure chemical vapour deposition Methods 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
- 241000287127 Passeridae Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910020328 SiSn Inorganic materials 0.000 description 1
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
- H01L21/30608—Anisotropic liquid etching
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/02—Elements
- C30B29/06—Silicon
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B33/00—After-treatment of single crystals or homogeneous polycrystalline material with defined structure
- C30B33/08—Etching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/2457—Parallel ribs and/or grooves
Definitions
- the present invention relates to a silicon prism and its method. Background leakage
- Crystalline etching is known as one of the methods for processing silicon wafers.
- Crystal anisotropic etching is an etching process such as KOH # ⁇ Etching proceeds for a certain crystal orientation, but it takes advantage of the fact that etching does not proceed sharply for a specific position. It is an etching method that is processed into an open dog.
- Silicone 8 is a slice of an ingot of silicon crystal that is sliced into a plate, and its single crystal has a diamond structure.
- the crystal plane of this silicon single crystal has a (100) plane, a (110) plane, a (111) plane, etc., and various etching processes have been studied depending on these crystal planes.
- ⁇ is ( ⁇ ) related to substrates.
- a silicon (100) substrate is anisotropically etched by virtue of patterning with a resist or the like, a pyramid type ⁇ ⁇ 'with a (111) plane as a base is formed.
- Specific examples of using this (100) -side etched shelf include DNA nanotweezers, microconnector sockets, and 1 ⁇ vise that take advantage of the fact that they can be processed into triangular openings.
- Most of the jobs related to etching are related to this ⁇ ) substrate.
- the conventional silicon processing using the anisotropic crystal I etching In i3 ⁇ 4i, There are many things that hang a ditch surface or ⁇ that hangs on the surface of a dog, and on the other hand, it doesn't cover anything that is made of silicon into a square dog, and its processing method is also known Tele sewing.
- the present inventor has obtained various applications such as a matrix for a filter and a fine high density 13 ⁇ 4 in various fields, if silicon angles are obtained.
- the present invention has been achieved.
- Patent ⁇ 1 Japanese Patent Laid-Open No. Hei 8- 9 0 4 3 1
- Non-Patent Document 1 Y. Uenishi, I Tsugai, and M. Mehregany, Micro-opto mechanical devices fabricated by anisotropic etching of (110) sil icon, "Proc. IEEE Micro Electro Mechanical Systems Workshop, Oiso Japan, pp. 319-324 , (1994).
- Non-Patent Document 2 Y. Uenishi, Tsutsui, and E Mehregany, "Micro-opto mechanical devices fabricated by anisotropic etching of (110) sil icon," J. Micromech. Microeng., Vol. 5, pp. 305-312 ( 1995) Disclosure of Invention
- an object of the present invention is to provide a completely new leakage difficulty of a silicon prism.
- the present invention makes it easy to use a silicon prism with a high aspect ratio.
- the silicon prism method of the first invention uses a (110) -plane silicon wafer, and the shape for alignment using two (m) planes perpendicular to the substrate surface inside the silicon /.
- the silicon prism method according to the second aspect of the invention uses a (110) -plane silicon film, and uses a silicon film ⁇ having two (111) planes perpendicular to the substrate surface inside the silicon film ⁇ .
- Mi) and alignment pattern forming process for forming alignment dogs on the surface along the image plane, and resist patterning aligned on the (111) surface of one side of Kagami.
- a first oriental I raw etching process that forms a splint by performing anisotropic etching on silicon and processing so that one of the (111) faces becomes a vertical wall
- a protective film forming process for forming a protective film on the surface of the silicon wafer including the wall surface, and a resist patterning that is aligned on the other (111) surface are performed, and crystal anisotropic I-etching is performed on the silicon wafer.
- the silicon according to the third invention is characterized in that the second (1) raw etching process in which the other (111) plane is processed into a vertical wall surface in the front ESS portion to form a prism is sequentially performed.
- the 3i method of prisms uses a (110) plane silicon wafer, uses a silicon wafer with two (111) planes perpendicular to the substrate surface inside the silicon plane, and has a negative (111) plane.
- the alignment along the surface that forms the alignment opening Forming a first resist pattern along one (111) plane, and forming a second resist pattern along another (111) plane on the first resist pattern.
- the previous word B3 ⁇ 4 is a process of cutting the silicon surface on the lower surface of the second resist pattern portion on the straight wall in the direction of the other (111) surface, and digging out the disgusting silicon surface by crystal anisotropic 1 'raw etching. Then, the first etching process for forming a prism with rain as the first resist pattern portion is sequentially performed.
- the silicon prism according to the fifth aspect of the present invention is a tree that is beaten by the spear of the third aspect of the invention.
- the silicon prism according to the sixth aspect of the present invention is such that the ridge is composed of the (110) plane and the four ridges are composed of the (111) plane.
- the (110) plane silicon X is used, and etching is performed so that two vertical () 1) planes appear on the substrate surface inside, so that ⁇ is the (110) plane. , Your face ( 111) A silicon angle of ft ⁇ is obtained.
- Etching was performed by forming two (111) planes, forming a tr alignment pattern, and aligning the first (111) plane with one (111) plane and the other (111) plane. Since the second anisotropic etching is performed, the (111) plane can be dug, and a silicon angle having a side wall perpendicular to B'fi can be obtained.
- the alignment type 4 forming process, the first anisotropic etching process, and the second anisotropic etching process are provided, all the effects of the first invention are achieved.
- a silicon angle S ⁇ ' is obtained with the side wall surface perpendicular to the top surface.
- the protective film forming step is inserted between the first anisotropic etching and the second anisotropic etching, the vertical wall formed by the first anisotropic etching is used.
- ffi The ability to attach a large amount of protection to the wall can prevent the wall from being scraped by the third-order etching. For this reason, in the second etching process, the surface of the side wall with the protective film is etched. Therefore, when etching is stopped at the (111) plane of the side wall, the prism is finished. Therefore, in the second invention, a silicon angle having four (111) plane walls in «101 and a high aspect ratio can be obtained.
- the alignment shape forming step, the first anisotropic etching step, and the second anisotropic etching step are included, the effects of the first invention are fully achieved.
- a silicon angle with a vertical sidewall surface can be obtained.
- the silicon surface before the process of forming the vertical wall is flattened 11 in the protection process, no special technique is required for resist coating, and the exposure is also low. It can be done for a forehead.
- ⁇ I is added to the side wall of the droop formed by the first anisotropic etching.
- the HOB sparrow has four (111) side walls and a high aspect ratio silicon angle.
- the silicon prism according to the fourth aspect of the present invention is laterally movable with respect to, and has an aspect ratio that is arbitrarily high. For this reason, it can be converted into various ways utilizing the angle ft? F ⁇ .
- the silicon prism according to the fifth aspect of the invention is perpendicular to the side and has a high aspect ratio. Can be used. For this reason, it can be adapted to various uses that make use of Kakuzhe dogs.
- the silicon prism according to the sixth aspect of the invention is perpendicular to the width of 4 and the side surface is surrounded only by the (111) plane, so that it is a prism without burrs or chips. Therefore, a prismatic power job with a high aspect ratio is possible, which is a versatile function. Brief description of the picture
- FIG. 1 is an explanatory view of steps (1) to (3) in the first step according to the present invention.
- FIG. 2 is an explanatory diagram of steps (4) to (6) in the production method.
- FIG. 3 is an explanatory diagram of steps (7) to (9) in the same problem.
- FIG. 4 is an explanatory diagram of steps (10) to (12) in the M3 ⁇ 4.
- FIG. 5 is an explanatory diagram of steps (1) to (3) in the second key removal according to the present invention.
- FIG. 6 is an explanatory diagram of steps (4) to (6) in the same problem.
- FIG. 7 is an explanatory diagram of steps (7) to (9) among the steps.
- FIG. 8 is an explanatory diagram of steps (10) to (12) in the same problem.
- FIG. 9 is an explanatory diagram of steps (1 3) to (15) of the same problem.
- FIG. 10A is a diagram for explaining the alignment guard dog 4
- FIG. 10B is an enlarged plan view of the alignment shape
- FIG. 10C is the same diagram.
- FIG. 11 (A) is a cross-sectional view of the straight wall 6, and FIG. 11 (B) is a view of the formed silicon prism 8.
- FIG. 12 shows (A) an explanatory diagram of the problem with the cut in the male of Fig. 2 (tl), (B) is a cross-sectional view with a cut, and (C) is the diagram FIG. 6 is a schematic view of the state after secondary etching.
- Figure 13 shows a SEM of a prism made by performing secondary crystal anisotropic etching for 30 minutes.
- Fig. 14 is a SEM ⁇ 3 ⁇ 4 of a rectangular column obtained by performing the second crystal anisotropic etching for 1 hour.
- Fig. 15 shows SEM ⁇ f3 ⁇ 4 in the state where etching is completed and iron oxide is also iron.
- FIG. 16 is an example of a single note in FIG. Fig. 17 is an explanatory diagram of the crystal plane orientation of silicon. Best Mode for Invention
- the present invention essentially forms a high-aspect-ratio prism with side walls that are perpendicular to the substrate surface inside the (no) silicon ⁇ .
- Technique 1 The principle is ⁇ T.
- the (111) plane standing in (110) silicon wafer is as shown in Fig. 13 and the force s.
- the arrow r is the surface spring vector. From this figure, it can be seen that in the (no) silicon wafer, the (111) plane is largely divided into WT and a plane perpendicular to the (110) plane.
- the vertical (111) planes form an angle of 109.5 °.
- an etching characteristic due to crystal anisotropy is used, and two perpendicular (111) planes are used to form an angle ratio angle Zhezo.
- the silicon wafer used in the present invention is a wafer that is sliced from an ingot so that the (110) plane is the surface.
- the mask for crystal raw etching is applied to the entire surface of silicon wafer 1.
- a protective film 2 is formed.
- This step is to prevent dripping when the crystal anisotropic etching is performed in the step (6) in the later step (2), the purpose of forming the alignment dog.
- Si 3 N 4 and Si0 2 can be used for dredging, and CVD can be used for dramatic removal.
- Si 3 N 4 is used to form alignment leashes and spiders.
- KOH and TMAH are the typical etchants for crystal anisotropic etching, and either of these nights can be anisotropically etched.
- Si ⁇ is not easily dissolved by KOH and TMAH, so etching (SiSN 4 is not lost in it is easy to make a JU / pure wholesale by time management.
- Si0 2 is an etching avoidance when using KOH. As a result, the time management for wholesaler sales is aroused, but it can be used as a mask material for samurai masks.
- alignment holes 3 are formed in this protective cover 2 (for example, ⁇ ⁇ ) formed by the self-winding process.
- This process can be performed with special restrictions by, for example, performing RIE (Reactive ion etching reactive ion etching) until the silicon surface comes out and pteing the resist with oxalic acid ii7].
- the number and number of alignment holes are arbitrary. However, the position needs to be formed in a place where the appearance on the mask aligner is visible. C A 1 If you use a mask array that can see the entire surface, it can be formed anywhere. As for the number, it is ⁇ £. In the figure, 2 pieces are shown on the right side, and a total of 4 pieces are shown, but this is not a limitation. In addition, the alignment between the two separated points will be an alignment excitement.
- the alignment opening 4 is formed on the silicon surface below the hole 3 formed in the sickle BI process (2). Therefore, crystal anisotropic I raw etching is performed.
- TMAH working tetramethyl ammonium hydroxide, (CH 3 ) 4 N0H) is put in a suitable container, and a force t 3 ⁇ 4 is applied to about 60 ° C. to 80 ° C., and ⁇ is immersed and etched.
- the SEM photograph of the alignment shape 4 formed at this time is shown in Fig. 1 (3).
- the alignment guard dog 4 is formed to be recessed in the silicon surface under the guard 2. The cunning ⁇ !
- Dog is ( ⁇ ) a hexagonal shape in a plan view, and (C) a triangular recess in the image view shown in Figure C. And it has two vertical (111) planes that cross this alignment dog 4 ttS. These two (111) planes are the »of Alien.
- resist 5 is applied to the surface of ⁇ 1 and exposed, so that a line play dog aligned with one vertical (111) surface for alignment is padded.
- the resist 5 a known material such as an organic resist can be used without particular limitation, and the coating method can be 0, for example, binco overnight or spray co overnight.
- the exposure method use the photo-etching method of VT.
- a “mask aligner” device that aligns the mask and the mask can be used. Also, because the resist patterning is very fine, move the wafer to the X, y direction and ⁇ (0 ⁇ while exposing, and align it with the alignment stab dog 4. When patterning is formed in multiple strips * 5, the silicon angle is set to 15 minutes for this sound.
- the silicon surface 2 is ironed to leave only the patterned key 2 (Si ⁇ ).
- the RIE layer 2 Si 3 N 4
- Si 3 N 4 is etched to expose the silicon surface. Clean with, and remove the resist.
- Si 3 N 4 is etched before the resist disappears, and the silicon surface comes out, but when it is etched, the resist disappears and Si ⁇ under the resist is also etched. It is necessary to go to Etchunk Spa. By this process, two layers of Si 3 N 4 are preserved during resist patterning.
- a protective film 7 is formed on the entire surface of the wafer 1.
- ⁇ is oxidized to form acid on the entire surface.
- the protective film 7 is formed on the entire surface of the silicon ⁇ 1 including the ⁇ 6a and ⁇ ⁇ 6b of the vertical B1I6. In other words, this step forms a mask material for the second anisotropic etching in the subsequent step (11).
- the method of ⁇ 0 can be used for the formation of Xie (Si0 2 ).
- Xie Si0 2
- an oxidation furnace is used and the inside of the furnace is set to about 1000 degrees, and soot gas is put therein, 1 can be oxidized.
- the oxidation process in acid [ ⁇ is dry and wet, but les are also available.
- film formation by CVD, APCVD (Atmospheric Pressure Chemical Vapor Deposition), and LPCVD methods are also possible, and these may be made satisfactory.
- resist patterning is performed by aligning the other vertical (111) plane of alignment shape 4 together.
- resist 8 is applied to the upper surface of ⁇ 1.
- the force of applying a thick film resist HJ? 30 m
- PMER, SU-8, etc. a saddle resist
- the As a method of resist application it can be applied to the entire surface of the pinco overnight. You can also attach ⁇ M to the resist suspension and apply it to the mask material. Then, pattern multiple lines according to the other vertical (m) plane.
- the alignment method at this time may be the same as in step (4).
- the pattern of resist patterning is as shown in the SEM photograph in Figure (8). In this process, the feg 6 formed in the step (6) and the resist pattern 8 formed in the present process are formed in a region surrounded by a well-like shape with 7 trillion acids.
- acid iU-7 is etched using resist 8 as a mask.
- acid etching is performed until the surface of the silicon wafer 1 comes out.
- etching may be carried out by immersing Ue-8 in the night of hydrofluoric acid,
- RIE reactive ion addition
- the silicon surface appears on the surface 6 and the silicon surface is protected by the resist 8.
- a portion of the vertical sound of the vertical male 6 that is attached to the vertical axis 7 is formed in 3 ⁇ 4S.
- the resist 8 applied in the step (8) is peeled off.
- the peeled state is as shown in Fig. 10 SEM, and this state is aligned with the other ( ⁇ straight (111) surface. ⁇ !) 7
- This flying oxide film 7 has resulted in 2pfi ⁇ forming a prism.
- the resist! ⁇ 3 ⁇ 4 is the same as the method in step (5), and is performed in 3 ⁇ 43 ⁇ 4i »K (mixed sulfuric acid and peroxygenated water with 3: 1 harm). There are other resist stripping methods, and you can use your own method.
- the second texture I raw etching is performed with silicon ⁇ 1 using the acid 7 as a mask.
- TMAH or the like can be used as an etchant, and the etching in this step can be performed by the same method as in step (6).
- the silicon surface of wafer 1 is dug, the vertical (111) surface formed in the previous step (6) is the other vertical (111) surface and the end of the mask portion (111) As a result, the silicon prism 8 is obtained.
- the acid is increased! ⁇ 3 ⁇ 4.
- This step may be performed with hydrofluoric acid, or may be performed by RIE. This results in 4 Dog II with a silicon prism 8 on a silicon base.
- FIG. 11 shows the state formed on the eight silicon prisms 1.
- the thus formed silicon prisms 8 of ⁇ > ⁇ : may be used while being forested on the substrate 1. Any arbitrary prisms 8 may be cut out and used for play.
- a: Silicon ( ⁇ ) on the (110) plane is used to etch so that two (111) planes perpendicular to the substrate surface inside it are exposed, so that is the (110) plane and ⁇ ⁇ is the (111) plane A silicon angle tt ⁇ 'is obtained.
- Etching was performed on two ( ⁇ straight (111) planes, and then aligned on one (111) plane and on the (111) plane. Since this is performed by the second weave etching, a silicon prism 8 having a surface perpendicular to ⁇ with respect to the force to dig out the (111) plane perpendicular to the male is obtained.
- the silicon prism 8 machined in the first fence is surrounded by (111) planes that are perpendicular to all four sides. Become a square shelf dog.
- the height of the prism that was experimentally created by this defeat is about 30, but in principle it can form a leash dog with a high aspect ratio.
- the second annihilation is an example of making a break in the formation of the retard, but the concept of crystal orientation in the present annihilation is the same as the first annihilation.
- the process power is always easy because the resist pattern can be processed to form a thin wafer, so that a good wafer can be turned.
- a cover 2 is formed on the entire surface of the silicon wafer 1.
- This layer 2 is used to form a mask during alignment of the alignment shape in the step (2) and the first anisotropic pattern in the step (1 0).
- Si 2 N 4 is formed by LP CVD. Obtained by filming.
- alignment holes 3 are formed in Si 3 N 4 as protective film 2 by etching.
- crystal anisotropic etching is performed by TMAH to form an alignment dog 4 on the silicon surface under the alignment dog.
- the alignment shape is a hexagonal recess shown in FIG. 10, and two vertical (111) planes are formed in the hexagonal recess.
- resist 5 is applied to the surface of silicon wafer 1, and multiple resist patterns are formed to match one vertical (111) surface of the alignment shape. To do.
- the alignment method is the same as the first manufacturing method.
- the protective film 2 (Si3 4 ) once formed in the step (1) is removed by etching. As a result, the silicon surface comes out except for the resist 5 part.
- the step (6) of the first manufacturing method is not performed, and the step (6) of this manufacturing method is performed as a step (6) in FIG. .
- an oxide film as a protective film 4 is formed on the entire surface of the silicon wafer.
- patterning is carried out on the surface of the substrate (SiaN ,,), so that the Si-like part of the band-like Si is not recognized, and the protection 4 (Si0 2 ) is formed only on the silicon surface. Is done.
- the protective film 4 formed in this step (6) serves as a mask material during vertical formation in the step (10).
- a plurality of resists 8 are patterned in accordance with the other vertical (111) plane.
- the alignment method is the same as Ml's first manufacturing method It is.
- the protective film 2 (Si3N 4 ) and the protective film 4 (Si0 2 ) are removed by ion etching or the like using the resist 8 as a mask.
- the strips are formed as Si0 2 and SisN 3 ⁇ 4S as guards 2 and 4, but in this way, they appear in Hoto 2 and 4 forces ⁇ .
- step (12) filming is performed by removing the wake 2 (Si) and exposing the silicon surface, and aligning the silicon surface part that appeared in step (13) with one vertical (111) surface. This is to make a cut.
- a mask aligned with two vertical (111) planes can be formed in a flat state with a silicon force of 1 force s. Therefore, the mask can be easily formed. .
- protective film 2 (SisN 4 ) is first formed in step (1), but before this, protective film 4 (Si0 2 ) is formed first, and then protective film is formed. 2 If (SisN 4 ) is deposited, the part that appears in the process (5) will be retained (Si0 2 ) force S, and the process (7) will be patterned as it is. You may make it perform. That is, by first forming a protective film 4 (Si0 2), as a result, the same shape as the step (6) is obtained.
- the vertical wall 6 is formed by digging down the silicon surface. Etching in this process does not etch the portions of the strip-shaped protective layers 2 and 4, but the silicon surface adjacent to the protective films 2 and 4 is dug, and the strip-shaped portion where the protective layer 2 and 4 force S is formed. 3 ⁇ 416 is formed. At this time, the side surface of the dredge 6 is vertical, but the wall surface of the vertical wall 6 is one of the (111) planes of the two (111) planes perpendicular to the (110) image on the wafer surface. Because there is.
- an oxide film SiO 2
- a protective rod 7 is formed on the surface I and I of the drooping wall 6.
- a mask material for the second crystal anisotropic etching of this process wheat is formed. is doing.
- the protection 2 (SisN 4 ) on the upper surface of the vertical wall 6 is removed by etching.
- RIE force S can be used for etching in this process.
- the purpose of this process is to remove this part by secondary anisotropic etching.
- a cut is made in the vertical wall 6 where the protective film 2 is removed.
- Any means can be used for cutting, for example, a dicing saw or laser processing can be used.
- the purpose of making this cut is to prevent etch stop at another oblique (111) plane and to proceed to the vertical plane.
- the oblique (111) plane appears, and when the base points of each other meet at one point, the etching stops there and etching is continued. Processing will not proceed.
- the cut marks 10 are formed vertically, the etching progresses toward the side, and the vertical direction as shown in the figure (C).
- (111) Etching will stop when the surface is removed. The emergence of this vertical (111) plane is an indispensable requirement for creating a power prism.
- Fig. 13 shows the SEM of a prism after 30 minutes of secondary crystalline etching.
- Fig. 14 shows the same SEM image of 1 hour after the completion of the etching.
- Fig. 5 shows the state where the etching is completed and the oxide film is also removed.
- S EMm Fig. 16 is the first part of Fig. 15! 3 ⁇ 4fc ⁇ 3 ⁇ 4.
- This silicon prism 8 is a structure in which a large number of silicon prisms 8 are formed on a silicon wafer 1 in the same manner as shown in FIG.
- Etching forms an alignment layer that has two vertical (111) planes, and then aligns the (111) plane with the first etching that is aligned with one (111) plane. Since the second anisotropic etching is performed, the (111) plane perpendicular to the male can be dug, and a silicon prism 8 with a side wall perpendicular to IB can be obtained. Since the silicon surface is formed in a flat state before the process of forming the vertical jl 6, no special technique is required for resist coating, and exposure can be performed for a forehead without any special problems.
- the protective film 7 is formed between the first anisotropic I 'raw etching and the second anisotropic etching, the side wall of the droop 6 formed by the first anisotropic etching is supported. 7 can be attached, the second; ⁇ side I's on the raw Etchank temple side! ! ⁇ Can be prevented from being scraped.
- the second isotropic etching is a layer that does not have a protective layer 7 and is processed into a prism when it is etched on the (111) surface of the wall.
- the silicon prisms 8 gathered in the second separation can form an angle K surrounded by a (111) plane that is perpendicular to all four sides. Further, according to this example, a shape with a high aspect ratio can be formed on the ridge.
- the silicon prism of the present invention has four ridges perpendicular to 3 ⁇ 4, and the ridge is surrounded only by the (111) plane, so that it has no burrs or chips. Therefore, a corner with a high aspect ratio can be created, and various applications such as ⁇ ⁇ can be used.
- the silicon prism according to the present invention can be applied to various applications in various industrial fields. For example, it is possible to use a metal mold for fill evenings, but it is not limited to these applications.
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Abstract
Description
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Priority Applications (2)
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JP2009505062A JP4714889B2 (ja) | 2007-03-16 | 2007-05-14 | シリコン角柱およびその製造法 |
US12/530,063 US20100129610A1 (en) | 2007-03-16 | 2007-05-14 | Prismatic silicon and method of producing same |
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JP2007-067708 | 2007-03-16 | ||
JP2007067708 | 2007-03-16 |
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PCT/JP2007/060298 WO2008114466A1 (ja) | 2007-03-16 | 2007-05-14 | シリコン角柱およびその製造法 |
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US (1) | US20100129610A1 (ja) |
JP (1) | JP4714889B2 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010018504A (ja) * | 2008-07-14 | 2010-01-28 | Japan Atomic Energy Agency | Si(110)表面の一次元ナノ構造及びその製造方法 |
JP2012171213A (ja) * | 2011-02-22 | 2012-09-10 | Fujikura Ltd | インプリントモールドの製造方法、インプリントモールド、及び配線板 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001189321A (ja) * | 1999-10-21 | 2001-07-10 | Matsushita Electric Ind Co Ltd | 横型ヘテロバイポーラトランジスタ及びその製造方法 |
JP2002103618A (ja) * | 2000-01-17 | 2002-04-09 | Seiko Epson Corp | インクジェット式記録ヘッド及びその製造方法並びにインクジェット式記録装置 |
-
2007
- 2007-05-14 JP JP2009505062A patent/JP4714889B2/ja not_active Expired - Fee Related
- 2007-05-14 US US12/530,063 patent/US20100129610A1/en not_active Abandoned
- 2007-05-14 WO PCT/JP2007/060298 patent/WO2008114466A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001189321A (ja) * | 1999-10-21 | 2001-07-10 | Matsushita Electric Ind Co Ltd | 横型ヘテロバイポーラトランジスタ及びその製造方法 |
JP2002103618A (ja) * | 2000-01-17 | 2002-04-09 | Seiko Epson Corp | インクジェット式記録ヘッド及びその製造方法並びにインクジェット式記録装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010018504A (ja) * | 2008-07-14 | 2010-01-28 | Japan Atomic Energy Agency | Si(110)表面の一次元ナノ構造及びその製造方法 |
JP2012171213A (ja) * | 2011-02-22 | 2012-09-10 | Fujikura Ltd | インプリントモールドの製造方法、インプリントモールド、及び配線板 |
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Publication number | Publication date |
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US20100129610A1 (en) | 2010-05-27 |
JPWO2008114466A1 (ja) | 2010-07-01 |
JP4714889B2 (ja) | 2011-06-29 |
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