WO2005062358A1 - Verfahren und vorrichtung zur trocknung von schaltungssubstraten - Google Patents
Verfahren und vorrichtung zur trocknung von schaltungssubstraten Download PDFInfo
- Publication number
- WO2005062358A1 WO2005062358A1 PCT/DE2004/002827 DE2004002827W WO2005062358A1 WO 2005062358 A1 WO2005062358 A1 WO 2005062358A1 DE 2004002827 W DE2004002827 W DE 2004002827W WO 2005062358 A1 WO2005062358 A1 WO 2005062358A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- liquid level
- rinsing
- circuit
- container
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001035 drying Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 230000005855 radiation Effects 0.000 claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 13
- 230000005499 meniscus Effects 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 18
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 239000008237 rinsing water Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/67034—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for drying
-
- 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
- F26B3/30—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun from infrared-emitting elements
Definitions
- the present invention relates to a method for drying circuit substrates, in particular semiconductor substrates, in which a circuit surface of the circuit substrate is rinsed with a rinsing liquid in one rinse cycle and the circuit surface is dried in a subsequent drying cycle. Furthermore, the invention relates to a device for carrying out the above method.
- connection surface structure which enables the subsequent contacting of the chips and which comprises the formation of suitable contact metallizations on the connection surfaces before they are separated into chips.
- chemical deposition techniques are regularly used, which enable the contact metallizations to be built up in layers.
- connection surface Following the rinsing process after evaporation of rinsing water residues remaining on the connection surface, corrosion nests remain on the connection surface.
- connection surface In the past, various efforts have therefore been made to enable the connection surface to be dried as residue-free as possible immediately after the rinsing process.
- One of these possibilities is to apply temperature to the circuit substrate after it has been exposed to rinsing liquid or after removal from a rinsing bath, in order to allow the rinsing water to evaporate as quickly and without residue.
- a disadvantage associated with this is that the temperature load associated with the known drying often reaches or even exceeds the temperature load which is just permissible for the circuit substrate to function properly.
- the surfactants used here as an addition to the rinse water, in turn regularly cause residues on the connection surface.
- residues can be avoided when cleaning with the addition of alcohol, but the use of alcohol as a rinsing liquid makes the additional use of often explosive substances necessary, so that the implementation of such Process requires special explosion protection and is therefore correspondingly expensive.
- the present invention is therefore based on the object of proposing a method or an apparatus for carrying out a method which is essentially residue-free
- the circuit substrate in which a circuit surface of the circuit substrate is rinsed with a rinsing liquid in a rinse cycle and the circuit surface is dried in a subsequent drying cycle, the circuit substrate is rinsed in the rinse cycle in the direction of its flat extension, transversely and relative to a liquid level of the rinsing liquid, moves in such a way that a liquid meniscus forms at a transition area that changes due to the relative movement between the circuit surface and the liquid level and in the drying cycle there is exposure to the radiation area wetted by the liquid meniscus with heat radiation.
- the circuit substrate When using the method according to the invention, the circuit substrate is exposed to heat radiation in a transition area wetted with the liquid meniscus, so that an absorption of the heat radiation in the circuit substrate results in an increase in the temperature of the liquid meniscus which causes evaporation. Since a part of the circuit substrate that changes, but always remains more or less large, remains in the liquid bath during the application of temperature. a heat dissipation from the circuit substrate in the liquid bath, so that overheating of the substrate can be largely excluded. In addition, the exposure to temperature by heat radiation enables the circuit substrate to be heated essentially without convection, so that contamination from impurities carried in a convection flow can be largely ruled out.
- the exposure to heat radiation takes place by means of an infrared radiator, so that a particularly effective heat input into the circuit substrate is made possible.
- a variant which is advantageous in particular with regard to the space required when carrying out the method consists in that, in order to carry out the relative movement between the liquid level and the circuit substrate, the circuit substrate is arranged in the rinsing liquid received by a bath container and the liquid level is lowered.
- the method not only enables a final cleaning step with regard to the residue-free drying of the connection surfaces of circuit substrates, but also the execution of a previous plurality of rinsing processes with the aim of determining the ion or anion concentration on the circuit surfaces before the subsequent drying cycle to be carried out in an overall continuous process in a single device.
- the device according to the invention for carrying out the method for drying circuit substrates, in particular semiconductor substrates, is provided with a bath tank, which has an inflow device and an outflow device and in which a receiving arrangement for receiving at least one circuit substrate is arranged, such that the circuit substrate is in one Level extends towards a container bottom.
- a bath tank which has an inflow device and an outflow device and in which a receiving arrangement for receiving at least one circuit substrate is arranged, such that the circuit substrate is in one Level extends towards a container bottom.
- the device with a lid device closing a container opening of the bath tank and with a heat radiator device arranged above the receiving arrangement.
- the heat radiator device is provided with infrared radiators.
- the heat radiator device is arranged on the cover device, a simple arrangement of the heat radiator device above the liquid level is possible, which enables simultaneous loading of a plurality of circuit substrates accommodated in the receptacle arrangement.
- the heat radiator is arranged above a transparent plate for separation from a container interior, so that the heat radiator itself is arranged protected outside the aggressive atmosphere in the container interior. If the bath container is provided with a ventilation device in the area of the lid device, the effectiveness of the device can be increased still further. It is particularly advantageous for a simple design of the device if the ventilation device is arranged on the cover device.
- FIG. 1 shows a sectional illustration of a device for cleaning semiconductor substrates
- FIG. 2 shows an enlarged illustration of a liquid meniscus formed between a liquid level and a circuit surface of the semiconductor substrate.
- FIG. 1 shows a bath container 11 filled with a rinsing liquid 10, which in the present case is formed from deionized water, in which a receiving arrangement 12 with wafers 13 evenly distributed therein is arranged.
- the receiving arrangement 12 can, for example, have two clamping jaws which accommodate the wafers 13 on the peripheral edge, so that the wafer surfaces remain freely accessible.
- the bath tank 11 is provided in the area of its tank bottom 14 with an inflow device 16 provided with an inlet valve 15. Furthermore, a drain device 17 is provided in the area of the container bottom 14, which has an outlet valve 18. In addition, the outflow device 17 is equipped with a flow valve 19 which enables the outflow speed of the flushing liquid 10 flowing out through the outflow device 17 to be adjusted.
- a lid device 20 which closes the container opening 24 is arranged to operate the bath container 11 as enables a process chamber that is sealed off from the environment.
- the lid device 20 is designed like a housing with a lid interior 21, in which a heat radiator device 22 is accommodated with heat radiators 23 comprising a plurality of infrared radiators in the present case.
- the cover device 20 can be provided with ventilation, not shown here.
- a cover wall 25 arranged directly opposite the container opening 24 is transparent and in the present case is designed as a glass plate 25 inserted into the cover device 20.
- the ventilation channels 26 open from the outside a rear container wall 34 of the bath container 1 1 and allow supply and discharge of a ventilation flow directed parallel to the liquid level 28 at a very low flow rate.
- the receiving arrangement 12 with the wafers 13 accommodated therein is inserted into the bath container 11 and the bath container 11 is closed by means of the lid device 20.
- the bath container 11 is flushed with the flushing liquid 10 until a liquid level 28 shown in FIG completely covers wafer 13 extending towards container bottom 14, flooded with rinsing liquid 10.
- the liquid level 28 is now preferably lowered continuously when the flow valve 19 is open, so that a progressively larger part of the wafers 13 protrudes from the washing liquid 10.
- a liquid meniscus 31, 32 is formed in a transition region 35 between the surfaces 29, 30 of the wafers 13 and the liquid level 28 extending transversely to the liquid level 28, as shown in FIG. 2.
- At least one of the surfaces 29, 30 is designed as a circuit surface with contact metallizations arranged thereon.
- the heat radiator device 22 which emits IR radiation in the present exemplary embodiment is in operation with the heat radiators 23 separated from the liquid level 28 by the glass plate 25.
- the part of the wafers 13 arranged above the liquid level 28 is heated, whereas the part of the wafers 13 arranged in the rinsing liquid 10 is relatively cooled by the heat transfer between the semiconductor material and the rinsing liquid 10 , This prevents the semiconductor material from overheating in spite of sufficient heating for the evaporation of the rinsing liquid 10 in the area of the liquid menisci 31, 32, which would impair the function of the wafer.
- the evaporation of the rinsing liquid 10 in the area of the liquid menisci 31, 32 ensures that essentially no residues of rinsing liquid remain on the surfaces 29, 30 of the wafers 13.
- the heating of the semiconductor material in the In the area of the liquid menisci 31, 32 the surface tension of the liquid menisci is also reduced, so that the wetting properties of the rinsing liquid 10 in the area of the surface menisci 31, 32 are increased and a better drainage of the rinsing liquid 10 from the surfaces 29, 30 is achieved.
- the heat transfer which is essentially limited to the border area between the surfaces 29, 30 of the wafer 13 and the liquid menisci 31, 32, ensures that heating and the associated reduction in the surface tension of the rinsing liquid only occur in the aforementioned border area, so that the adjacent area The surface tension of the rinsing liquid is essentially maintained and it is prevented that drops form in the area of the liquid menisci 31, 32.
- This advantageous effect is further supported by the choice of a sinking rate of the liquid level 28, which enables a sufficient contact time between the surfaces 29, 30 of the wafer 13 and the liquid menisci 31, 32 to achieve the aforementioned effects.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04803007A EP1697980B1 (de) | 2003-12-22 | 2004-12-22 | Verfahren und vorrichtung zur trocknung von schaltungssubstraten |
DE502004009900T DE502004009900D1 (de) | 2003-12-22 | 2004-12-22 | Verfahren und vorrichtung zur trocknung von schaltungssubstraten |
US10/582,421 US8256131B2 (en) | 2003-12-22 | 2004-12-22 | Method and device for drying circuit substrates |
JP2006529632A JP2007524232A (ja) | 2003-12-22 | 2004-12-22 | 回路基板の乾燥方法および装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10361075.8 | 2003-12-22 | ||
DE10361075A DE10361075A1 (de) | 2003-12-22 | 2003-12-22 | Verfahren und Vorichtung zur Trocknung von Schaltungssubstraten |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005062358A1 true WO2005062358A1 (de) | 2005-07-07 |
Family
ID=34706549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2004/002827 WO2005062358A1 (de) | 2003-12-22 | 2004-12-22 | Verfahren und vorrichtung zur trocknung von schaltungssubstraten |
Country Status (6)
Country | Link |
---|---|
US (1) | US8256131B2 (de) |
EP (1) | EP1697980B1 (de) |
JP (1) | JP2007524232A (de) |
KR (1) | KR20060127867A (de) |
DE (2) | DE10361075A1 (de) |
WO (1) | WO2005062358A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8256131B2 (en) * | 2003-12-22 | 2012-09-04 | Pac-Tech—Packaging Technologies GmbH | Method and device for drying circuit substrates |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6849368B2 (ja) * | 2016-09-30 | 2021-03-24 | 芝浦メカトロニクス株式会社 | 基板処理装置 |
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- 2004-12-22 US US10/582,421 patent/US8256131B2/en active Active
- 2004-12-22 JP JP2006529632A patent/JP2007524232A/ja active Pending
- 2004-12-22 EP EP04803007A patent/EP1697980B1/de active Active
- 2004-12-22 DE DE502004009900T patent/DE502004009900D1/de active Active
- 2004-12-22 KR KR1020067012414A patent/KR20060127867A/ko not_active Application Discontinuation
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US8256131B2 (en) * | 2003-12-22 | 2012-09-04 | Pac-Tech—Packaging Technologies GmbH | Method and device for drying circuit substrates |
Also Published As
Publication number | Publication date |
---|---|
JP2007524232A (ja) | 2007-08-23 |
EP1697980B1 (de) | 2009-08-12 |
DE502004009900D1 (de) | 2009-09-24 |
US20080282574A1 (en) | 2008-11-20 |
EP1697980A1 (de) | 2006-09-06 |
US8256131B2 (en) | 2012-09-04 |
DE10361075A1 (de) | 2005-07-28 |
KR20060127867A (ko) | 2006-12-13 |
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