CN1655883A - Washing method and washing device - Google Patents

Washing method and washing device Download PDF

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Publication number
CN1655883A
CN1655883A CN 03811605 CN03811605A CN1655883A CN 1655883 A CN1655883 A CN 1655883A CN 03811605 CN03811605 CN 03811605 CN 03811605 A CN03811605 A CN 03811605A CN 1655883 A CN1655883 A CN 1655883A
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China
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mentioned
fluid
cleaning
cleansing medium
thing
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CN1320966C (en
Inventor
入江庸介
森田清之
铃木正明
足立明久
桥本雅彦
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Publication of CN1655883A publication Critical patent/CN1655883A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0021—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by liquid gases or supercritical fluids

Abstract

A cleaning effect is improved by cleaning a component that has a recess structure by using a cleaning medium of a liquefied gas or a supercritical fluid. By the cleaning method of removing adhering substances adhering to at least the surface of the recess structure of the component that has the recess structure, cleaning is carried out by using the supercritical gas or the liquefied gas so that the cleaning medium spreads over the surface of the recess structure.

Description

Cleaning method and cleaning device
Technical field
The present invention relates to have the parts of recess configuration, be the parts that utilize machining, pressure processing etc. to make specifically, be cleaned the cleaning method and the cleaning device of thing in particular for the Precision Machining parts in electronic unit field etc.
Background technology
In the past, the parts that utilize machining, pressure processing etc. to make after processing such as machining or pressure processing, need carry out " cleaning ", " flushing ", " drying " three operations in particular for the precise part of electronic unit.This is because in machining or pressure processing processing oil is used for the processing object thing, so need to remove attached to the unnecessary processing oil on this processing object thing.Especially for the precise part that requires the height cleaning performance, not only need the high cleaning agent of cleansing power, the more important thing is drying process as final operation.
Under this background, adopt Freon 113 or 1,1,1 in the final operation in accurate cleaning field, the steam purge of-trichloroethanes is removed the lubricating oil as processing oil.But, Freon 113 or 1,1,1 ,-trichloroethanes can cause depletion of the ozone layer aspect environment, and 1,1,1 ,-trichloroethanes is big to the influence of human central nervous system, will cause unconsciousness during high concentration and ceases breathing etc.Therefore, Japan limits freon since in July, 1989, stops to produce in nineteen ninety-five comprehensively.
Along with Freon 113 and 1,1,1, withdrawing from of-trichloroethanes, liquid ceanser as ozone layer destroying material substitute, non-water system is used as bromine series solvent (1-N-Propyl Bromide or propyl group bromide), hydrocarbon system solvent (nalka hydrocarbon system, isomerization alkanes system, the cycloalkanes hydrocarbon system, the fragrance family), iodine series solvent (perfluor n-propyl iodide hydrochlorate, perfluor n-butyl iodide hydrochlorate, perfluor n-hexyl iodate), the chlorine series solvent is (as aliphatic trichloroethanes, tetrachloroethanes, carrene, 31,2-dichloroethanes and as aromatic monochlorotoluene, trifluoromethylbenzene, to chloro-trifluoromethyl benzene (PCBTF), 3,4-two chloro-trifluoromethyl benzenes (3,4-DCBTF)), fluorine series solvent (the HCFC-255ca of HCFC system, HCFC-141b, HCFC-123, the HFC-4310mee of HFC system, HFC-356mcf, HFC-338Pcc, the HFE-7100 of HFE system, HFE-7200, the OFCPA of ring-type HFC system), siloxane-based solvent (volatile methyl siloxane system (VMS), dodecamethylcyclohexasiloxane, HMDO, decamethyl tetrasiloxane), ketone series solvent (methyl ethyl ketone (MEX)), alcohol series solvent (ethanol, isopropyl alcohol (IPA), or five fluorine propyl alcohol (5FP)).
Accurate water system can be used hydrocarbon system (nalka hydrocarbon system, isomerization alkanes system, cycloalkanes hydrocarbon system or fragrant family), gylcol ether (ethene is glycol ether or isoprene glycol ether), N-N-methyl-2-2-pyrrolidone N-(NMP), テ Le ベ Application ゼ Application class (d-citrene) or siloxane-based (volatile methyl siloxane is VMS, dodecamethylcyclohexasiloxane, HMDO or decamethyl tetrasiloxane).
Water system comprises non-interpolation (deoxygenated water, deionized water, ultra-pure water), utilize additive to improve (alkali system, acidity, ionic surfactant, nonionic surface active agent, higher alcohol are surfactant or the ultra-pure water that adds ozone) system etc. of cleaning.
Like this, made the alternative liquid ceanser of using of multiple freon, the cleaning method that uses them has been used for precise part.
Open as shown in the flat 9-263994 communique as the spy,, anneal 700～900 ℃ of so very high temperature and to burn lubricating oil, to replace cleaning with organic solvent as processing oil to battery case.But, the film lamination that is used for aluminium electrolutic capacitor exists with aluminium sheet, attached to pollutant sintering in annealing process such as the rolling oil that rolls the plate surface, metal powders, cause problems such as bad order or adaptation be bad, therefore, open in the flat 6-272015 communique, in the softening annealing operation of handling the spy, before annealing,, carry out annealing in process with after inorganic acid or organic acid or its nitration mixture cleaning surface of aluminum plate.
Also have, recently as battery case, in international publication number WO97/42668, WO97/42667, WO98/10475, with organic solvent or alkali is that degreasing agent carries out degreasing to copper coin, acid is cleaned, and the after-applied heat treatment of plating is heated to the fusing point of the pertroleum wax base lubricant that will be coated with, at its surface coating fusion lubricant, this surface treatment copper coin is used for deep drawing processing, DI (Drawn ﹠amp; Ironed) processing or DS (Dry Sanding) processing, DTR (Drawing ﹠amp; Thin Redrawing) processing.If in the heating of 200～350 ℃ of temperature, its major part is volatilized removal after machine-shaping for this lubricating oil, therefore can simplify the cleaning after the processing.
In addition, framework or electrolytic capacitor, the precise electronic parts etc. of speciallyying permit the HDD (hard disk drive) of record in No. 3234541 are, single face or two sides at aluminum alloy materials form the organic resin epithelium that contains lubricant, improve processing and forming, at its surface coating fugitive lubricant, after the processing lubricant heated volatile is removed.
Another cleaning method is, open in the 2000-225382 communique as the spy and to put down in writing, during with the water clean metal parts of overcritical or subcritical state or mould, by making reducing agent coexistence as the organic or inorganic that cleans composition, change the state of die surface, perhaps under the situation that can not be touched the thing equivalent damage, clean and remove pollutant.Also have, show in the clear 59-502137 communique the useful supercritical gas of motion as the spy and remove organic cleaning method.Also have, specially permit in No. 2832190 communique openly, the state of the fluid by changing overcritical or subcritical state rapidly improves cleaning performance.
Like this, the lubricating oil that is used to improve processing and forming in processing and forming is must obligato material, even we can say that exploitation lubricating oil is exactly the more forming processing technology of height of exploitation.But, being used for the lubricating oil of this processing and forming, the precise part after will processing will become the bad reasons of goods such as causing product properties deterioration or pollution if fail to remove fully during as goods.Thereby the same with coating lubricating oil in processing and forming, the cleaning method that exploitation can be removed this lubricating oil fully also is must be obligato.
But, use the cleaning method of solvent, especially in the degreasing link, consider environment and adopt conduct such as freon substituting agent depletion of the ozone layer not to be brought the solvent of influence more, but and do not know its influence for environment.For example, the 2-N-Propyl Bromide is the known substance as the intermediate of medicine, agricultural chemicals, emulsion or alkylating agent etc.And cleaning required time, cost also are big problems.Be used in which kind of goods according to the parts after the processing and forming, with the degree of cleaning after the decision processing.Therefore, wish to use the high solvent of cleaning force, but as mentioned above and do not know of the influence of the high solvent of cleaning force, and it is also low to influence the cleaning force of little solvent, so have to increase time and operation (wash number) to environment.
For example, be carried out the material of plating after the processing such as battery case, aluminium electrolutic capacitor, need accurate the cleaning, because of carrying out degreasing, removing impurity, activation, so the matting required time is long.Also have, be used for the framework of HDD etc., the anti-degassing during use is very important, and ungrease treatment is extremely paid attention to.Also have, during solvent clean, managerial operations such as the disposal (law of labour safety and health) of the management of solvent (fire service law), human body aspect, waste liquid recycling are very complicated, and corresponding manpower is also many, thereby reduces production efficiency.
Therefore, in order to simplify the cleaning method that uses solvent as far as possible, perhaps as the good method of not carrying out solvent clean, adopt the lubricated wet goods of a kind of combination organic resin film and volatility to process after, evaporate the method for volatility lubricating oil with annealing.But this method can not evaporate lubricating oil fully, in any case all can be at more residual oil contents of finished surface or impurity etc. during micron order.Also have, especially parts in the deep drawing parts of being processed by pressure forming etc. with complicated structures such as recesses, even anneal for evaporating lubricating oil, but be subjected to structure influence, most cases is for evaporating fully or pressure processing is printed on crystal boundary such as stainless steel etc. and goes up residual impurity with lubricating oil, even residue such as oil content or impurity is few, if anneal at the state of its existence, then oil content is with charing, or impurity sintering, thereby produce the unfavorable condition or the degassings such as dirt or spot, cause the application products performance to descend.And, for preventing under the accurate situation of cleaning that product properties from descending and the surface treatment copper coin that uses in order to simplify the cleaning after the processing or not adopt, using with identical in the past organic solvent or alkali when making the surface treatment copper coin is after degreasing agent carries out degreasing, acid cleaning, plating, apply heat treatment, therefore, only the variation by cleaning after cleaning or process before the processing almost can't improve the influence to environment or human body.
As another cleaning method of considering environmental factor, proposing has overcritical or the carbon dioxide of subcritical state or the ablution that water cleans of employing.This method is, in the carbon dioxide of overcritical or subcritical state or water, make reducing agent coexistence as the organic or inorganic that cleans composition, the general parts etc. that only are used to pay attention to change or be touched in the surface state that does not cause mould precision die such as the plastic shaping prism lens that cleans under the situation of thing damage etc. or mold periphery, main purpose is for removing organic matter.
But, parts by the processing of pressure forming processing method, especially electronic unit, at the impurity that adds the generation in man-hour lubricating oil being arranged not only is the organic matter of representative, also comprise inorganic matter monomers such as cutting swarf or powder, and mixing organic matter and inorganic matter, even therefore to good removal effect of organic matter, under the environment that inorganic matter and organic matter mix, just be difficult to obtain the organic effect of removal.
Also have, purging system very costliness and scavenging period is long, and therefore, the main cleaning thing of using is very costliness and reusable parts such as mould.
Thereby, the object of the invention is to address the above problem, provide a kind of and be cleaned thing and can improve its cleaning performance by clean parts with recess configuration etc. with cleansing mediums such as liquid gas or supercritical fluids, the parts etc. with recess configuration are cleaned the cleaning method and the cleaning device of thing.
Disclosure of an invention
The present invention is constructed as follows in order to achieve the above object.
The 1st scheme of the present invention provides a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by the above-mentioned parts that are attached with above-mentioned attachment are put into rinse bath, in said washing groove, feed cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change temperature, the pressure of above-mentioned cleansing medium, above-mentioned cleansing medium is carried out the state variation that liquid condition and gaseous state replace, make cleansing medium spread over above-mentioned recess configuration surface and clean.
The 6th scheme of the present invention provides a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by the above-mentioned parts that are attached with above-mentioned attachment are put into rinse bath, in said washing groove, feed the 1st cleansing medium, change the temperature of above-mentioned the 1st cleansing medium, pressure, above-mentioned the 1st cleansing medium is changed to supercriticality, after the above-mentioned surface that makes above-mentioned the 1st cleansing medium spread over above-mentioned recess configuration was cleaned, the liquid that further is used as the 2nd cleansing medium carried out liquid to above-mentioned parts and cleans.
The 9th scheme of the present invention provides a kind of cleaning device, possess rinse bath and, to said washing groove supply with cleansing medium the cleansing medium supply unit and, give above-mentioned cleansing medium variations in temperature heater and, give pressue device that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device, by controlling above-mentioned heater, at least one side of pressue device, after above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace, cleansing medium is changed to supercriticality or subcritical state, the recess configuration surface of said washing groove inner part is cleaned.
The 10th scheme of the present invention provides a kind of cleaning device, possess have the introducing port that imports cleansing medium and discharge the outlet of cleansing medium and take in the cleaning object thing rinse bath and, through above-mentioned introducing port to said washing groove supply with above-mentioned cleansing medium the cleansing medium supply unit and, give above-mentioned cleansing medium variations in temperature heater and, give pressue device that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device and, the recoverer of the removal material after the cleansing medium that recovery is discharged from above-mentioned outlet cleans with collection, by controlling above-mentioned heater, at least one side of pressue device, the above-mentioned cleaning object thing with recess configuration that is accommodated in said washing groove is adopted supercritical gas or liquid gas, making cleansing medium spread over above-mentioned recess configuration surface cleans, above-mentioned introducing port is positioned at the downside of above-mentioned outlet simultaneously, and above-mentioned outlet is positioned at the upside of cleaning object thing.
The 20th scheme of the present invention provides a kind of cleaning method that utilizes pressure fluid, by making pressure fluid and being cleaned thing and contacting to remove in the cleaning method attached to the above-mentioned impurity that is cleaned the thing surface, the above-mentioned density of thing that is cleaned is below the fluid density of above-mentioned fluid, by the pressure that changes above-mentioned fluid, at least one condition in the temperature, above-mentioned repeatedly fluid density is for the above-mentioned height that is cleaned thing density, and the above-mentioned thing that is cleaned is contacted with above-mentioned fluid.
The 21st scheme of the present invention provides a kind of cleaning method that utilizes pressure fluid, by making pressure fluid and being cleaned thing and contacting to remove in the cleaning method attached to the above-mentioned impurity that is cleaned the thing surface, the above-mentioned density of thing that is cleaned is below the fluid density of above-mentioned fluid, by the pressure that changes above-mentioned fluid, at least one condition in the temperature, make under the approaching state of the above-mentioned fluid density that is cleaned thing density and above-mentioned fluid, give above-mentioned fluid change by external force, so that the above-mentioned thing that is cleaned contacts with above-mentioned fluid.
The 23rd scheme of the present invention provides a kind of cleaning method that utilizes pressure fluid, by making pressure fluid and being cleaned thing and contacting to remove in the cleaning method attached to the above-mentioned impurity that is cleaned the thing surface, to being impregnated into the above-mentioned thing that is cleaned in pressurization the 1st fluid, when pressurization the 2nd fluid contact that makes density be different from above-mentioned the 1st fluid is cleaned, do not change above-mentioned the 1st fluid phase, the above-mentioned thing that is cleaned is contacted with above-mentioned the 2nd fluid.
Promptly, the present invention is exactly in order to solve above-mentioned problem, in the cleaning method of removal, clean by using supercritical gas or liquid gas to make cleansing medium fully spread over above-mentioned recess configuration surface attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration.
According to this formation, make cleansing medium fully spread over the recess configuration surface with supercritical gas or liquid gas, clean attachment quickly and easily attached to recess.
Description of drawings
About various purposes of the present invention and feature, can illustrate to such an extent that further to define from the following of the relevant preferred implementation of accompanying drawing.In this accompanying drawing:
Fig. 1 is the state diagram of the cleansing medium of the present invention's the 1st embodiment.
Fig. 2 A, Fig. 2 B, Fig. 2 C, Fig. 2 D sectional drawing and stereogram for having the examples of members of recess configuration in expression the present invention the 1st embodiment.
Fig. 3 is the key diagram of purging system in expression the present invention the 1st embodiment.
Fig. 4 A, Fig. 4 B are the chart of matting in expression the present invention the 1st embodiment.
Fig. 5 is for cleaning the sectional drawing of state in expression the present invention the 1st embodiment.
Fig. 6 is the key diagram of the cleaning object thing of the embodiment 1 of expression the present invention the 1st embodiment.
Fig. 7 is the stereogram of the cleaning object thing of the embodiment 3 of expression the present invention the 1st embodiment.
Fig. 8 is the key diagram of the contact angle of the embodiment 3 of expression the present invention the 1st embodiment.
Fig. 9 represents that the rerum natura of water is to temperature dependent key diagram.
Figure 10 A, Figure 10 B are the key diagram of representing macroscopical part of easy residual contaminants with arrow and the key diagram of representing the part of easy residual contaminants on the microcosmic with arrow.
Figure 11 goes up the key diagram of the part of easy residual contaminants for represent macroscopic view with arrow.
Figure 12 in the cleaning method of the present invention's the 1st embodiment as the broad cross-section map of another routine ultrasonic sensor shell of cleaning object thing.
Figure 13 is the time diagram during controlled pressure in the cleaning method of the present invention's the 1st embodiment.
Figure 14 is the time diagram when controlling temperature in the cleaning method of the present invention's the 1st embodiment.
In the cleaning method of Figure 15 for the variation of the present invention's the 1st embodiment, the key diagram when using the two-layer equation chamber to improve pressure.
In the cleaning method of Figure 16 for the variation of the present invention's the 1st embodiment, when using the two-layer equation chamber to reduce pressure, open the key diagram when being divided into double-deck door.
In the cleaning device of Figure 17 for the variation of the present invention's the 1st embodiment, the key diagram when supplying with thermal medium with liquid condition.
In the cleaning device of Figure 18 for the variation of the present invention's the 1st embodiment, the key diagram when supplying with thermal medium with gaseous state.
Figure 19 controls with the key diagram that concerns between the relay with relay and pressure for the control device and the temperature control of the cleaning device of the variation of expression the present invention the 1st embodiment.
In the cleaning device of Figure 20 for the variation of expression the present invention the 1st embodiment, rotate the key diagram that stirs when using screw in order to improve cleaning efficiency.
In the cleaning device of Figure 21 for the variation of expression the present invention the 1st embodiment, rotate the key diagram that stirs when using screw in order to improve cleaning efficiency.
In the cleaning device of Figure 22 for the variation of expression the present invention the 1st embodiment, rotate the key diagram that stirs when using screw in order to improve cleaning efficiency.
In the cleaning device of Figure 23 for the variation of expression the present invention the 1st embodiment, rotate when stirring the key diagram when nozzle is also supplied with cleansing medium in order to improve cleaning efficiency with screw.
In the cleaning device of Figure 24 for the variation of expression the present invention the 1st embodiment, supply with the key diagram of the state of cleansing medium from nozzle in order to improve cleaning efficiency.
In the cleaning device of Figure 25 for the variation of expression the present invention the 1st embodiment, rotate the key diagram of supplying with hyperacoustic state when stirring from ultrasonic sensor in order to improve cleaning efficiency with screw.
In the cleaning device of Figure 26 for the variation of expression the present invention the 1st embodiment, supply with the key diagram of hyperacoustic state from ultrasonic sensor in order to improve cleaning efficiency.
Figure 27 A, Figure 27 B, Figure 27 C are the broad cross-section map of the various nozzle forms of the cleaning device of the variation of expression the present invention the 1st embodiment.
In the cleaning device of Figure 28 for the variation of expression the present invention the 1st embodiment, supply with the key diagram of cleansing medium in order from a plurality of nozzles with the state of generation convection current in order to improve cleaning efficiency.
Figure 29 is the state diagram of carbon dioxide or water or other fluid (liquid).
Figure 30 is the skeleton diagram of cleaning device in the present invention's the 2nd embodiment.
Figure 31 is the skeleton diagram of cleaning device in the present invention's the 3rd embodiment.
When Figure 32 is cleaned thing density greater than fluid density for expression, be cleaned the diagrammatic illustration figure of thing and relationship between fluids.
When Figure 33 is cleaned thing density less than fluid density for expression, be cleaned the diagrammatic illustration figure of thing and relationship between fluids.
Figure 34 is approaching and not during rotating screw for expression is cleaned thing density and fluid density, is cleaned the diagrammatic illustration figure of thing and relationship between fluids.
When Figure 35 is cleaned the approaching and rotating screw of thing density and fluid density for expression, be cleaned the diagrammatic illustration figure of thing and relationship between fluids.
Figure 36 is the skeleton diagram during the configuration information database on the cleaning device of Figure 30.
The specific embodiment
Same parts has been given identical reference marks in being noted that accompanying drawing before continuing the present invention's record.
Below, before reference description of drawings embodiment of the present invention, summary of the present invention is described.
The 1st invention of the present invention is a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by with supercritical gas or liquid gas, make cleansing medium fully spread over above-mentioned recess configuration surface and clean.
The 2nd invention of the present invention for as the cleaning method of the 1st invention record, wherein: the whole surface of the parts that cleansing medium fully spread over have recess configuration is cleaned.
The 3rd invention of the present invention is a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by putting into rinse bath adhering to appendiculate parts, in said washing groove, feed cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change temperature, the pressure of above-mentioned cleansing medium, above-mentioned cleansing medium is carried out the state variation that liquid condition and gaseous state replace, make cleansing medium fully spread over above-mentioned recess configuration surface and clean.
Constitute according to this, rerum naturas such as the density by the control liquid condition, viscosity utilize the physical energy of the state variation that causes liquid, gas, supercriticality to improve cleaning performance.
The 4th invention of the present invention for as the cleaning method of the 3rd invention record, wherein: after above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace, cleansing medium is varied to supercriticality cleans the recess configuration surface.
The 5th invention of the present invention for as the cleaning method of the 3rd invention record, wherein: after above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace, cleansing medium is varied to subcritical state cleans the recess configuration surface.
The 6th invention of the present invention for as the cleaning method of the 3rd invention or the 4th invention record, wherein: change pressure for cleansing medium from liquid condition under steady temperature, alternately gaseous state and liquid condition are repeatedly carried out state variation.
The 7th invention of the present invention for as the cleaning method of the 3rd invention or the 4th invention record, wherein: change pressure for cleansing medium under steady temperature, alternately gaseous state and liquid condition are repeatedly carried out state variation.
The 8th invention of the present invention is a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by putting into rinse bath adhering to appendiculate parts, in said washing groove, feed cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change temperature, the pressure of above-mentioned cleansing medium, cleansing medium is become supercriticality, make cleansing medium fully spread over above-mentioned recess configuration surface and clean.
The 9th invention of the present invention is a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by putting into rinse bath adhering to appendiculate parts, in said washing groove, feed cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change temperature, the pressure of above-mentioned cleansing medium, cleansing medium is become supercriticality, after making cleansing medium fully spread over above-mentioned recess configuration surface to clean, further carry out liquid and clean.
The 10th invention of the present invention is the cleaning method as record in any one invention of the 1st～9 invention, and wherein: cleansing medium is carbon dioxide, water.
The 11st invention of the present invention is a kind of cleaning method, in the cleaning method of removal attached to the attachment on the above-mentioned at least recess configuration surface of parts with recess configuration, by putting into rinse bath adhering to appendiculate parts, in said washing groove, import carbon dioxide as cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change the temperature of above-mentioned cleansing medium, pressure, cleansing medium is become supercriticality, after making cleansing medium fully spread over above-mentioned recess configuration surface to clean, further import water again as cleansing medium, will become supercriticality as the water of this cleansing medium and clean the recess configuration surface.
The 12nd invention of the present invention is a kind of cleaning device, possess rinse bath and, to said washing groove supply with cleansing medium the cleansing medium supply unit and, give above-mentioned cleansing medium variations in temperature heater and, give pressue device that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device, by controlling above-mentioned heater, at least one side of pressue device, the cleaning object thing with recess configuration that is accommodated in rinse bath is used supercritical gas or liquid gas, make cleansing medium fully spread over above-mentioned recess configuration surface and clean.
The 13rd invention of the present invention is the cleaning device as the 12nd invention record, at least one side by control heater, pressue device, after above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace, make cleansing medium be changed to supercriticality or subcritical state cleans the recess configuration surface.
The 14th invention of the present invention is for a kind of cleaning device, possess have the introducing port that imports cleansing medium and discharge the outlet of cleansing medium and take in the cleaning object thing rinse bath and, through above-mentioned introducing port to said washing groove supply with cleansing medium the cleansing medium supply unit and, give above-mentioned cleansing medium variations in temperature heater and, give pressue device that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device and, the extraction collection container as a routine recoverer of the removal material after the cleansing medium that recovery is discharged from above-mentioned outlet cleans with collection; By controlling at least one side of above-mentioned heater, pressue device, the cleaning object thing with recess configuration that is accommodated in rinse bath is adopted supercritical gas or liquid gas, making cleansing medium fully spread over above-mentioned recess configuration surface cleans, above-mentioned introducing port is positioned at the downside of above-mentioned outlet simultaneously, and above-mentioned outlet is positioned at the upside of cleaning object thing.
The 15th invention of the present invention is the cleaning method as record in any one invention of the 1st～11 invention, it is characterized in that: the tectosome of parts for being formed by pressure forming or machining method with recess configuration.
The 16th invention of the present invention is the cleaning method as record in any one invention of the 1st～11 invention, it is characterized in that: have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of metal material.
The 17th invention of the present invention is the cleaning method as the 16th invention record, and it is characterized in that: the principal component that forms the metal material of the parts with above-mentioned recess configuration is made of Fe, Al, Cu or Ti.
The 18th invention of the present invention is the cleaning method as record in any one invention of the 1st～11 invention, it is characterized in that: have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of organic material.
The 19th invention of the present invention is the cleaning method as the 18th invention record, and it is characterized in that: the principal component that forms the organic material of the parts with above-mentioned recess configuration is made of polyimides or epoxy resin.
The 20th invention of the present invention is the cleaning method as record in any one invention of the 1st～11 invention, it is characterized in that: have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of ceramic material.
The 21st invention of the present invention for as the cleaning method of the 20th invention record, it is characterized in that: the principal component of ceramic material that forms the parts with above-mentioned recess configuration is by SiO 2, PZT, Ag or C constitute.
The 22nd invention of the present invention for as any one invention of the 1st～11 invention in the cleaning method of record, wherein: the parts with above-mentioned recess configuration are mainly by the complex of metal and organic material, mainly be made of the complex of organic material and ceramic material or main complex by metal and organic material and ceramic material.
The 23rd invention of the present invention for as any one invention of the 1st～11 invention in the cleaning method of record, it is characterized in that: to be ultrasonic sensor various shells such as use with, HDD (hard disk drive) with, electrolytic capacitor with, battery with matching layer or electronic component-use, ultrasonic sensor to the parts with recess configuration.
Here use the supercriticality or the liquid condition (comprising subcritical state) of liquid gas as a routine cleansing medium.The liquid gas kind is mainly used carbon dioxide (CO 2) or water (H 2O) monomer, the perhaps mixture of carbon dioxide and water.Use which kind of cleansing medium or be used in combination cleansing medium according to the main material of component parts or the formation thing decision of polluter.
For example the principal component of cleaning part is a metal, when pollutant is the oxide of organic system such as grease and inorganic system, at first use carbon dioxide to clean the organic system pollutant after, import water and come etching to remove the oxide etc. of inorganic system.
Also have, rerum naturas such as the density of the present invention by the control liquid condition, viscosity utilize the physical energy of the state variation that causes liquid, gas, supercriticality to improve cleaning performance.Especially liquid condition carbon dioxide, easily control rerum naturas such as density of liquid, viscosity by the temperature or the pressure that change in the container, and the state of control gaseous state, liquid condition, supercriticality, its control temperature, pressure differential be near normal temperature, atmospheric pressure, therefore operation easily.
And, also little to the harmful effect of environment and human body.By object appropriate combination rerum natura, the state variation that needs are cleaned, giving pollutant (processing oil or cutting swarf etc.) physical energy of following rerum natura, state variation to produce removes, or reduce pollutant to cleaning the adhesive force of thing, to improve cleaning efficiency.For example, at first in high-pressure bottle, import the liquid condition carbon dioxide, change temperature or pressure, liquid condition and gaseous state repeatedly.Follow state variation in this operation, the rerum natura of carbon dioxide also changes simultaneously, thereby physical energy acts on pollutant, reduces the adhesive strength of pollutant.Then, turn to supercriticality, organic principles such as dissolving grease, and decompose.As everyone knows, lubricant components such as supercriticality carbon dioxide solubilized and decomposing organic matter, but the state variation by composition gas state, liquid condition, the effectively pollutants such as mixture of cleaning organic matter or inorganic matter, organic matter and inorganic matter.
Cleaning thing as an example of the present invention, is by the parts of pressure forming processing or the parts of processing by cutting process, it is characterized in that having recess configuration.Especially the parts that have recess configuration, pollutant (processing oil or cutting belong to etc.) are from structural plane or add and print to the recess configuration part man-hour because of exerting pressure, and perhaps follow plastic deformation cutting swarf etc. and residual easily, so also the most difficult cleaning when cleaning.But, by gas, liquid condition and the supercriticality of suitable use liquid gas, especially can improve the cleaning efficiency of parts, and carbon dioxide becomes gas at normal temperatures with recess configuration, therefore being characterized as need not drying process.As the parts that clean thing mainly is the parts that adopt pressure forming processing or machining to make, and it is characterized in that the principal component of these parts is made of metal material, organic material, ceramic material or their compound.The principal component of this metal material contains any one of Fe, Al, Cu, Ti.The principal component of organic material is polyimides or epoxy resin or thermoplastic resin, and the principal component of ceramic material is SiO 2, Ag, PZT or C.Cleansing medium is selected carbon dioxide or water etc. according to the cleaning object thing.
The parts that the present invention is fit to clean are, have recess configuration as the matching layer of ultrasonic sensor or shell, battery case or electrode, HDD with the shell of shell (framework) or electrolytic capacitor etc., degree of cleaning needs accurate the cleaning and added value height and the electronic unit that satisfies conditions such as each piece volumes is little.
The cleaning method and the device thereof of the present invention's the 1st embodiment are described with Fig. 1～Fig. 4 B below.
The supercritical fluid and the liquid gas that use in the cleaning method at first are described.
The expression transverse axis is that temperature T, the longitudinal axis are the state diagram of the cleansing medium of pressure P among Fig. 1.Triple point (the black circle 21 among the figure) in Fig. 1 is the state of gas, liquid, solid three-phase coexistence.When temperature was lower than triple point temperature, solid and its steam kept balance, and the steam pressure of this moment is provided by sublimation curve (Fig. 1 20).When pressure was lower than this curve, the solid distillation became gas, solidify out into solid when pressure is high.When temperature was higher than triple point temperature, liquid and its steam kept balance, and the pressure of this moment is saturated vapour pressure with vapor line (Fig. 1 22) expression.When pressure was lower than this curve, liquid all gasified, and pressure is when being higher than it, steam all liquefy (a-quadrant).Even constant pressure and transformation temperature, if surpass this curve, then liquid becomes steam, and steam becomes liquid.The terminal point of this vapor line is called critical point (the white circle 23 of Fig. 1), and existence can't be distinguished the state of liquid and gas, and the liquid-gas boundary face also disappears.When temperature is higher than the state of this critical point, can under the condition that does not produce the gas-liquid coexisting state, between liquid and gas, change back and forth.In this zone, increase density in any case, can not cause condensing yet.State (area B) above this critical-temperature (Tc) and that critical pressure (Pc) is above calls supercritical fluid.
Also have, liquid gas is meant, as shown in Figure 1 temperature range more than the triple point temperature and below the critical-temperature, pressure is more than triple point pressure and be higher than the state in the zone of vapor line pressure.
Like this, reach the process of supercritical fluid, through the subcritical state of temperature, pressure subcritical point as shown in Figure 1 from the liquid gas state.Here, subcritical state is meant the state of the 0.6 times of scope that is positioned at above-mentioned critical-temperature (Tc) and critical pressure (Pc), thereby is defined as the state that is in following subcritical temperature and subcritical pressure boiler scope.
Critical-temperature (Tc)＞subcritical temperature 〉=0.6 * critical-temperature (Tc)
Critical pressure (Pc)＞subcritical temperature 〉=0.6 * critical-temperature (Pc)
This cleansing medium is varied to supercriticality from liquid gas through subcritical state.
Supercritical fluid used herein or liquid gas are carbon dioxide (CO 2) or water (H 2O).
The critical-temperature of carbon dioxide (Tc)=31.1 ℃, critical pressure (Pc)=7.38MPa; The critical-temperature of water (Tc)=374.1 ℃, critical pressure (Pc)=22.04MPa.
Then, use Fig. 3 that the summary of the purging system of the present invention's the 1st embodiment is described.Constituting of the cleaning device of the present invention's the 1st embodiment possesses the high-pressure bottle 1 as a routine rinse bath at least, possess the liquefaction of cleansing medium and supply with groove (or high-pressure pump) 2, supply with groove 2 is supplied with liquid pump (example that is equivalent to the cleansing medium supply unit) 3 from the liquid gas that becomes cleansing medium to high-pressure bottle 1 from liquefaction, heater 5 in the heating high-pressure container 1, control the heater control part 4 of liquid gas temperature in the high-pressure bottle 1 by control heater 5, the waste liquid accumulator tank 6 of the waste liquid after the cleaning in the recovery high-pressure bottle 1, gasification is recovered to the gasifier 7 of the liquid gas of waste liquid accumulator tank 6, collect and clean the extraction collection container 8 that the conduct one routine recoverer of material is removed in the back.In the high-pressure bottle 1 because the liquefied gas supplying of liquid pump 3 and pressure change, under the control of heater control part 4 by the temperature of heater 5 control liquid gas.Like this, by control said temperature or above-mentioned pressure, generation utilizes cleansing medium to clean thing as supercritical fluid (being supercritical gas in the present embodiment), subcritical fluids (being subcritical gas in the 1st embodiment) or the liquid gas of cleansing medium.Also have, 1000 is the control device of the cleaning action of the above-mentioned cleaning device of control among Fig. 3, is connected to liquid pump 3 and heater control part 4 and gasifier 7 and extraction collection container 8, to control each action.
Here, use liquid gas, but can directly supply with subcritical fluids or supercritical fluid in the high-pressure bottle 1 as cleansing medium, and gasifier 7 can gasify subcritical fluids or supercritical fluid.
Then, the cleaning thing is described.Represent as Fig. 2 A, Fig. 2 B, Fig. 2 C, Fig. 2 D, have parts (27,28,29,30) after the pressure forming processing of recess or the parts (27,28,29,30) that form by machining and adhere to attachment 26 at recess especially easily, as lubricating wet goods processing oil or impurity (cutting swarf etc.).Also have,, add the part of exerting pressure man-hour because of the structure that this recess partly is into, therefore partly compare with other smooth structures, the tack height of lubricated wet goods processing oil or impurity (cutting swarf etc.), and cleaning agent is difficult to soak into, and cleans spot, wash residue so generate easily.
More particularly, as cleaning object thing or the concrete example that is cleaned the residual place 40 of the pollutant of parts of thing be, the situation of the deep drawing processed goods in the pressure forming product is, be by pressure forming near the crooked part on the macroscopic view shown in Figure 10 A, on the microcosmic concavo-convex serious part (in other words being the coarse part of material surface) shown in Figure 10 B, or the solvent for cleaning part that is difficult to enter especially.Also have, the situation of the punching processing product in the pressure forming product is, as shown in figure 11, punching is with the part 41 of blade contact when being punching on the macroscopic view, it on the microcosmic part that concavo-convex serious part (in other words being the coarse part of material surface), especially solvent for cleaning are difficult to enter.
Also have, the attachment that is difficult to drop as pollutant especially and can utilize cleaning method of the present invention and the example of the attachment that device cleans, the lubricating oil that uses during for pressure forming when above-mentioned attachment is pressure forming oil (application type) especially prints to the lubricating oil of material or processes rotten lubricating oil because of heating.Also have, before above-mentioned attachment is material during application type lubricating oil in advance to the machine-shaping material of material coating lubricating oil, be not when pressure forming, to be coated with, but be applied to surperficial lubricating oil in material factory.
As the cleaning object thing of cleaning method of the present invention and device or be cleaned the material of the parts of thing, various stainless steels, aluminium, titanium, iron etc. are arranged during as metal.Especially the iron that gets rusty easily etc. are because of needn't dry be suitable as the cleaning object thing of cleaning method of the present invention and device or be cleaned the material that thing is parts.In addition, as metal and organic composite, have at metal surface stickup organic matter (PPT, PET etc.) material of thin plate or the material of coating.
Also have,, represent the shape of other ultrasonic wave shells at Figure 12 as another example of cleaning object thing.
Then, it is high and have liquefaction (the comprising subcritical fluids) carbon dioxide of certain viscosity or water as cleansing medium to import permeability in high-pressure bottle 1.Especially carbon dioxide is, becomes liquid condition under lower temperature and pressure.Therefore, temperature and pressure is controlled in action by control device 1000 control liquid pumps 3 and heater control part 4, (rerum natura is changed to here, and density is from 0.6～1kg/m during as comparison gas and liquid thereby the rerum natura of easily making liquid condition and gaseous state changes 3Change to 1000kg/m 3, changing 3～4 figure places, viscosity is from 10 -5Pas changes to 10 -3Pas changes 2 figure places, and diffusion coefficient is from 10 -5Change to 10 -9Below, changing more than 4 figure places, thermal conductivity factor is from 10 -3Change to 10 -1, change 2 figure places) or from the liquid condition to the gaseous state, the state variation from the gaseous state to the liquid condition.
Also have, carbon dioxide or water are also harmless to human body, and operability is good.
Further, carbon dioxide or water have organic decomposition, removal effect in critical condition, and water has effects such as etching oxide in specified pressure and state of temperature, thereby bring into play feature separately, effectively clean the parts with recess configuration.
Here, though the supercriticality of carbon dioxide has the mechanism of oxide unclear fully at present to organic decomposition, removal effect and glassware for drinking water, but think this macroscopical average properties of balance rerum natura of the dissolving power that is to represent, ionic product etc. and locality structure with solvation (group) equimolecular level as density function.Especially recently just think relevant with structure with the solvent that is formed at around the solute molecule, when there is solute molecule in the shooting flow scapus in warm-up movement and molecular separating force antagonism, solute-solvent interaction obtains relative advantage, solvent molecule around the solute molecule is attracted, solvation takes place, thereby near and the main body of solute molecule is compared and is become high-density state.This is considered to the phenomenon of the features such as promotion of the high selectivity dissolving power of supercritical fluid or reaction speed close relation is arranged.
Also have, about the oxide etching effect of water, the rerum natura of representing water at Fig. 9 is to dependence on temperature (25MPa constant pressureization).The dielectric constant of water is about 80 under the room temperature, and is very big.
Therefore, though inorganic matters such as electrolyte can dissolve well, organic matter dissolves hardly.But dielectric constant descends gradually when improving temperature, is 10 degree in the supercritical water more than 374 ℃, becomes the organic solvent suitable value little with polarity.Though its result's organic matter can dissolve well, inorganic matter dissolves hardly.Make full use of this rerum natura variable condition, especially, also can obtain etching effect inorganic matters such as oxides before and after 200 ℃ of temperature and under 5～10MPa degree pressure.
The following describes with purging system shown in Figure 3 to this cleaning thing the situation the when parts that promptly have a recess clean.Here, Fig. 4 A, Fig. 4 B are identical with the state diagram of cleansing medium shown in Figure 1.
Be attached with through the parts cleaning things such as (especially electronic units) of pressure forming processing under the state of processing oil or impurity and be placed into high-pressure bottle 1.After high-pressure bottle 1 imports parts, change any one party in temperature or the pressure, carry out from the liquid condition to the gaseous state state variation from the gaseous state to the liquid condition.
For example, approach 1 is shown in Fig. 4 A, becomes gaseous state from liquid condition when improving temperature under constant pressure, becomes liquid condition when this state falls (reduction) temperature after rise.On the other hand, approach 2 is shown in Fig. 4 B, becomes gaseous state from liquid condition when steady temperature decline low-pressure, gets back to liquid condition from gaseous state during from this state increase pressure.If this operation several times repeatedly, especially when liquid condition becomes gaseous state, processing oil or impurity (cutting swarf etc.) are subjected to physical energy (rerum natura are changed to, and density is from 0.6～1kg/m during as comparison gas state and liquid condition 3Change to 1000kg/m 3, changing 3～4 figure places, viscosity is from 10 -5Pas changes to 10 -3Pas changes 2 figure places, and diffusion coefficient is from 10 -5Change to 10 -9Below, change more than 4 figure places.Thermal conductivity factor is from 10 -3Change to 10 -1, change 2 figure places.Wherein, the physical energy that the surface tension variations of especially thinking to follow variable density and viscosity to change is brought) effect descends attached to the processing oil of parts or the adhesive force of impurity (cutting swarf etc.), improves cleaning performance.
Also have, by liquid condition and gaseous state repeatedly, the convection current (arrow 31) that produces liquid gas as shown in Figure 5 in high-pressure bottle makes each corner that is penetrated into the parts 32 with recess as the liquid gas of cleaning agent, to improve cleaning performance.
Then, it is characterized in that temperature, pressure are changed to more than the critical point, turn to supercriticality, carry out this cleaning.This moment is through repeatedly repeatedly after the operation of gaseous state and liquid condition, liquid gas is discharged to outside the high-pressure bottle, again import liquid gas, then temperature or pressure changes to critical point temperature and more than the critical-point pressure, forward the matting of carrying out in supercriticality to.Mainly carry out organic decomposition during supercriticality and remove, carrying out inorganic under specified temp and pressure state is the etching (making the situation of water) of oxide.
Also have,, also can not use supercriticality but only clean by the matting of aforesaid liquid state and gaseous state repeatedly according to pollution level as the parts that clean thing.
Here the degree of cleaning of parts, describe putting down into " sample 2 " shown in the report " classification of the index of general cleaning degree evaluation method and cleaning degree " in 6 years if use Japanese industry to clean consultation, be meant " the thick cleaning " degree or " the general cleaning " degree of being designated as cleaning degree.
The cleaning device of the present invention's the 1st embodiment is, possesses high-pressure bottle 1, import the liquid pump 3 of supercritical gas and liquid gas to above-mentioned high-pressure bottle 1, the heater control part 4 and the heater 5 of the temperature of supercritical gas and liquid gas in the control high-pressure bottle 1, collect the extraction collection container 8 of the removal material after cleaning, control device 1000, as Fig. 3 and shown in Figure 5, be used for to be positioned at from the downside of the outlet 1b of above-mentioned high-pressure bottle 1 relief liquor oxidizing gases to the introducing port 1a that above-mentioned high-pressure bottle 1 imports liquid gas, further, outlet 1b is positioned at the upside of cleaning object thing 31.This mainly be because, the proportion of cleaning object thing 31 is greater than the proportion of purge gas when liquid condition or supercriticality, with respect to this, the proportion of organic system pollutant or inorganic system oxide is less than purge gas.Therefore, tend to float over when liquid condition or the supercriticality as the organic matter of pollutant or inorganic matter and clean on the thing.The downside that needs introducing port 1a to be positioned at outlet 1b is because fully spread over parts with recess configuration as cleaning object thing 31 in order to make liquid gas as purge gas.
On the other hand, the upside that needs outlet 1b to be positioned at introducing port 1a be because, in order to prevent to adhere again on the parts 31 from once removed attachment of cleaning part 31 or pollutant.
The parts that are expected to obtain cleaning performance by the cleaning method of the present invention's the 1st embodiment and cleaning device mainly are electronics electronic components associated therewith and associated components thereof.Especially pass through the Precision Machining parts of pressure forming processing and machining.These parts must use lubricated wet goods processing oil in order to improve machining accuracy.But the residual processing that will influence subsequent processing of this processing oil is handled or bonding etc. Performance Characteristics as plating, causes the Performance And Reliability of device and goods to reduce.Therefore, to high-caliber removing residues, promptly need accurate parts performance effect of cleaning.
Use commodity comprise the matching layer of ultrasonic sensor or the electrode of battery (especially secondary cell etc.), other also have battery case, HDD with shell (also being called framework) or electrolytic capacitor with shell etc.Ultrasonic sensor is formed with countless fine holes or concavo-convex with matching layer etc., forms the microcosmic recess configuration.Specifically, using inorganic is the material that glass marble mixes with organic system epoxy resin, and inorganic is various materials such as glass marble, organic system epoxy resin.
Also have, ultrasonic sensor is with shell etc., and its material is stainless steel, aluminium or epoxy resin.Deep drawing or the resin forming according to pressure forming processing, machining are adopted in processing.Battery case generally uses aluminium, perhaps uses the multilayer steel that aluminium carried out plating recently, by the pressure forming processing and fabricating.HDD uses aluminium with sheathing material, uses the bimetal that aluminium is carried out the organic system coating especially recently, carries out pressure forming processing.Electrolytic capacitor with shell too, material uses aluminium or apply the clad steel plate of organic membrane coat on aluminum, carries out pressure forming processing.
Like this, by selecting operation or as the gas of cleansing medium etc., can also being applied to the composite of lamination different materials organic matter and inorganic matter.But be not limited to these goods fields, certainly to also effective by the parts with recess configuration of pressure forming processing and machining processing.
That is, in the cleaning method of above-mentioned the 1st embodiment, above-mentioned cleansing medium is changed temperature or pressure, make above-mentioned cleansing medium carry out the state variation that liquid condition and gaseous state replace, make cleansing medium fully spread over above-mentioned recess configuration surface.Also have, further as required, above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace after, above-mentioned cleansing medium is become the cleaning that supercriticality is carried out above-mentioned recess configuration surface.Also have, above-mentioned cleansing medium is carried out state variation that liquid condition and gaseous state replace after, above-mentioned cleansing medium is become the cleaning that subcritical state carries out above-mentioned recess configuration surface.
In a word, as making cleansing medium fully spread over the method for parts, change pressure or temperature utilize convection current to spread all over, and therefore following 7 kinds of methods are arranged.These can utilize control device 1000, the action of control liquid pump 3 and heater control part 4, and the control temperature and pressure carries out.
(1) after carrying out (liquid-gas) more than at least 1 circulation as 1 circulation, to supercriticality control temperature.
(2) after carrying out (gas-liquid) more than at least 1 circulation as 1 circulation, to the supercriticality controlled pressure.
(3) after carrying out (liquid-gas-liquid) more than at least 1 circulation as 1 circulation, to supercriticality control temperature.
(4) after carrying out (gas-liquid-gas) more than at least 1 circulation as 1 circulation, to the supercriticality controlled pressure.
(5) after carrying out (liquid-overcritical) more than at least 1 circulation as 1 circulation, to supercriticality control temperature.
(6) after carrying out (gas-overcritical) more than at least 1 circulation as 1 circulation, to the supercriticality controlled pressure.
(7) at least 1 time in 1 circulation of (1)～(6) as supercriticality.Controlled pressure or temperature.
Here, for as shown in figure 13, be respectively cavity indoor pressure and CO according to the time chart of the pressure control usefulness of the control device 1000 of the action of liquid pump 3 control for the longitudinal axis of transverse axis time shaft 2Import and discharge.Import CO when cavity indoor pressure is high 2, discharge CO when cavity indoor pressure is low 2, by regularly this operates controlled pressure repeatedly.
Also have, for as shown in figure 13, be respectively the ON (opening) or the OFF (pass) of temperature and heater power source in the chamber for the longitudinal axis of transverse axis time shaft according to the time chart of the temperature control usefulness of the control device 1000 of the action control of heater control part 4.Heater power source is ON when improving in the chamber temperature, and heater power source is OFF when reducing in the chamber temperature, by regularly this is operated and controls temperature repeatedly.
Above-mentioned pressure controlled additive method is, the two-layer equation chamber that employing is made of main chamber 43 and secondary cavity 44, under the action control of control device 1000, when improving pressure, close the door 45 of layering as shown in figure 15, easily improve pressure, when reducing pressure on the other hand, the door 45 open layered as shown in figure 16 according to the action control of control device 1000.In addition, among Figure 15 and Figure 16,46 is cleansing medium, and 47 is the cleaning object thing.
Further, temperature controlled additive method is, as shown in figure 17, with importing the cleansing medium 49 that temperature is higher or lower than cleaning liquid 49 with liquid condition in the cleaning liquid 49 of liquid pump 3 in main chamber 48, the cleansing medium in the main chamber 48 is controlled to fixed temperature.Also have, as shown in figure 18, replace pump 3 in main chamber 48, to import the cleansing medium 50 that temperature is higher or lower than cleaning liquid 49, the cleaning liquid 49 in the main chamber 48 is controlled to fixed temperature with gaseous state with pump 3A.
Figure 19 be the built-in above-mentioned cleaning method of expression action control control program control device 1000 and, according to the temperature control in the heater control part 4 of control device 1000 control actions with relay 53 and, according to the pressure control in the liquid pump 3 of control device 1000 control actions with relay 54 and, the key diagram of above-mentioned cleaning device 60.
As shown in figure 20, in above-mentioned the 1st embodiment, improve the method for cleaning efficiency as an example, under the control of control device 1000, utilize motor 63 rotations to be disposed at the impeller (stir and use screw) 62 of main chamber 64 top sides, stir the cleansing medium 65 in the main chamber 64, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium.
Also have, as shown in figure 21, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, utilize motor 63 rotations to be disposed at the impeller (stir and use screw) 62 of the bottom surface side of main chamber 64, stir the cleansing medium 65 in the main chamber 64, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium.
Also have, as shown in figure 22, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, utilize motor 63 rotations to be disposed at the impeller (stir and use screw) 62 of the side of main chamber 64, stir the cleansing medium 65 in the main chamber 64, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium.
Also have, as shown in figure 23, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, utilize motor 63 rotations to be disposed at the impeller (stir and use screw) 62 of main chamber 64 top sides, stir the cleansing medium 65 in the main chamber 64, simultaneously under the control of control device 1000, drive liquid pump 3, import cleansing medium from a pair of nozzle 66 that is configured in the side that is opposite to main chamber 64 to main chamber 64, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium.
Also have, as shown in figure 24, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, drive liquid pump 3,, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium from importing cleansing medium to main chamber 64 with a plurality of nozzles 66 of radial configuration in the cylindric side of main chamber 64.
Also have, as shown in figure 25, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, simultaneously or successively drive arrangements is given ultrasonic vibration from the side of main chamber 64 to cleansing medium 65 at a pair of ultrasonic sensor 67 of the opposite side of main chamber 64, improves the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium.
Also have, as shown in figure 26, in above-mentioned the 1st embodiment, improve the method for cleaning performance as another example, under the control of control device 1000, simultaneously or drive successively, give ultrasonic vibration to cleansing medium 65, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium from the side of main chamber 64 with a plurality of ultrasonic sensors 67 of radial configuration in the cylindric side of main chamber 64.
Also have, as shown in figure 28, in Figure 24 cleaning device, improve the method for cleaning performance as another example, also can be under the control of control device 1000, from importing cleansing medium successively to main chamber 64, improve the cleaning efficiency of 65 pairs of cleaning object things 47 of cleansing medium with a plurality of nozzles 66 of radial configuration in the cylindric side of main chamber 64.At this moment, as shown in figure 28, from 1 to 8 nozzle numeric order, perhaps from 8 to 1 order imports cleansing medium from nozzle 66 successively to main chamber 64, produces convection current in main chamber 64, further improves cleaning efficiency.At each nozzle open and close valve or gate are set,, control importing order, switching time, ejection pressure, the spray volume of cleansing medium arbitrarily by the action of control device 1000 these open and close valves of control or gate.
The front end shape of each nozzle 66 of above-mentioned the 1st embodiment is the shape shown in Figure 27 A～27C preferably.Being configured to shown in Figure 27 A～27C of nozzle form, separately number, ejection pressure, ejection time by changing ejiction opening, change from the energy density of the fluid of nozzle ejection, improve stirring efficiency corresponding to the cleaning object thing.For example, when the size of cleaning object thing is big, when simple in structure, not too stir and also remove impurity easily, even therefore simply nozzle form is also no problem shown in Figure 27 A.On the other hand, if the size of cleaning object thing is little and during complex structure, according to its size and complexity, nozzle form is also used as mixing effects such as Figure 27 B, Figure 27 C high.Also have, when the cleaning object thing for very accurate optics etc. or be highly brittle when weak, preferably change nozzle form, ejection pressure, ejection time according to the cleaning object thing.Only represent two-dimensional structure in the accompanying drawing, but in fact had three-dimensional structure.
Below, according to specific embodiment, the effect of above-mentioned the 1st embodiment of the present invention is described.
Embodiment 1
Cleaning is through the shell of pressure forming processing and machining.Cleaning is used carbon dioxide with liquid gas.As shown in Figure 6, be material be SUS304, be of a size of φ: 12mm, the height h:5mm the shell with recess configuration.Using this shell to measure according to the residue (oil content) of different cleanings measures and particulate loading.Cleaning has been discussed following 7 kinds of operations, 1. solvent clean (1-N-Propyl Bromide), 2. at liquid condition cleaning during change pressure under steady temperature, 3. change pressure under steady temperature, cleaning during the state variation of 5 gaseous states and liquid condition repeatedly, the cleaning when 4. only adopting overcritical cleaning the, 5. overcritical cleaning after 2. operation, 6. overcritical cleaning after 3. operation, 7. after supercriticality is cleaned, clean in liquid condition.Respectively clean 100 shells in each matting, and analyze.Residual oil content analysis is behind solvent (carbon tetrachloride) extraction oil content, to measure its extraction oil content with FT-IR (Fourier transform infrared measure).Also having, is to clean the back to measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.It is the results are shown in table 1.
Table 1
Matting The oil residues component Particulate loading
????① 0.7mg/100 it is individual 500/cm 2
????② 0.4mg/100 it is individual 250/cm 2
????③ 0.3mg/100 it is individual 150/cm 2
????④ 0.3mg/100 it is individual 100/cm 2
????⑤ 0.2mg/100 it is individual 70/cm 2
????⑥ 0.1mg/100 it is individual 30/cm 2
????⑦ 0.3mg/100 it is individual 100/cm 2
Can know that from above result compare with solvent clean, oil residues component and particulate loading can obtain smaller value.Also have, by changing pressure, the gaseous state of combined carbon dioxide, liquid condition, supercriticality can further improve the cleaning performance of removing inorganic system particulate.
Embodiment 2
Identical with embodiment 1, clean shell through pressure forming processing and machining.Cleaning is used carbon dioxide with liquid gas.As shown in Figure 6, be material be SUS304, be of a size of φ 12mm, the height 5mm the shell with recess configuration.Using this shell to measure according to the residue (oil content) of different cleanings measures and particulate loading.Cleaning has been discussed following 5 kinds of operations, 1. at liquid condition cleaning during transformation temperature under constant pressure, 2. transformation temperature under constant pressure, the cleaning the during state variation of 5 gaseous states and liquid condition repeatedly, the cleaning when 3. only adopting overcritical cleaning the, 4. overcritical cleaning after 1. operation, 5. overcritical cleaning after cleaning 2..Respectively clean 100 shells in each matting, and analyze.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared measure).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.It is the results are shown in table 2.
Table 2
Matting The oil residues component Particulate loading
????① 0.4mg/100 it is individual 238/cm 2
????② 0.3mg/100 it is individual 148/cm 2
????③ 0.3mg/100 it is individual 105/cm 2
????④ 0.2mg/100 it is individual 73/cm 2
????⑤ 0.1mg/100 it is individual 48/cm 2
Can know that from above result identical when carrying out rerum natura variation, state variation with change pressure under steady temperature, when transformation temperature cleaned under constant pressure, oil residues component and particulate loading also can obtain smaller value.Also have, by changing temperature, the gaseous state of combined carbon dioxide, liquid condition, supercriticality can also improve the cleaning performance of removing inorganic system particulate.
Embodiment 3
Adopt in the cleaning method of inquiring among the embodiment 1 the most effective matting 6. " change pressure under steady temperature carries out overcritical cleaning after the state variation of 5 gaseous states and liquid condition repeatedly ", the shell of cleaning unlike material.The material of shell is 1. aluminium, the 2. composite plate of the organic film of coating, 3. stainless steel SUS304,4. Cu, 5. Ti on aluminium.As shown in Figure 7, shell shape is vertical 5mm * horizontal 30mm * high 50mm.Respectively clean 100 shells in each matting, analyze.Cleaning is used carbon dioxide with liquid gas.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared spectrophotometry method).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.It is the results are shown in table 3.
Table 3
Matting The oil residues component Particulate loading Outward appearance
????① 0.2mg/100 it is individual 35/cm 2 ????○
????② 0.2mg/100 it is individual 37/cm 2 ????○
????③ 0.2mg/100 it is individual 33/cm 2 ????○
????④ 0.2mg/100 it is individual 35/cm 2 ????○
????⑤ 0.2mg/100 it is individual 33/cm 2 ????○
Can know from above result, judge, can both obtain cleaning performance without exception from oil residues component and particulate loading and visual examination.Also have, the shell for unlike material also can clean under the situation that does not cause wound as can be known.
The judgment standard of visual examination, particulate loading adopts Japanese industry to clean consultation and illustrate putting down into " sample 2 " shown in the report " classification of the index of general cleaning degree evaluation method and cleaning degree " in 6 years, wherein being decided to be zero more than " the generally cleaning " as the cleaning degree record.
Embodiment 4
Adopt in the cleaning method of inquiring among the embodiment 1 the most effective matting 6. " change pressure under steady temperature carries out overcritical cleaning after the state variation of 5 gaseous states and liquid condition repeatedly ", the parts of cleaning unlike material.Just, the organic system material is soft than metal system and pottery, has therefore shortened the time.Cleaning is used carbon dioxide with liquid gas.Parts are for processing or cut the material of machining shape through pressure forming.The material of parts is 1. epoxy resin, 2. polyimide resin, 3. plastics, 4. mixture, the 5. SiO of epoxy resin and glass marble 2, 6. C (carbon).Component shape is diameter phi 10.8mm * high 1.15mm.SEM (Scanning ElectronMicroscopy, SEM) is used in visual examination, to particulate, cleans the back and measures with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes).It is the results are shown in table 4.
Table 4
Cleaning part Visual examination Particulate loading
????① ????○ ????○
????② ????○ ????○
????③ ????○ ????○
????④ ????○ ????○
????⑤ ????○ ????○
????⑥ ????○ ????○
The judgment standard of visual examination, particulate loading adopts Japanese industry to clean consultation and illustrate putting down into " sample 2 " shown in the report " classification of the index of general cleaning degree evaluation method and cleaning degree " in 6 years, wherein being decided to be zero more than " the generally cleaning " as the cleaning degree record.
Embodiment 5
Further,, especially prevent pollutant adhesion effect again, change the structure of high-pressure bottle and the container fixed position of cleaning object thing and clean, measure oil residues component and particulate loading in order to investigate cleaning performance.Cleaning is used carbon dioxide with liquid gas.Matting adopt in the cleaning method of inquiring among the embodiment 1 the most effective matting 6. " change pressure under steady temperature carries out overcritical cleaning after the state variation of 5 gaseous states and liquid condition repeatedly " clean.Parts are shells of being processed into through pressure forming, are shaped as vertical 5mm * horizontal 30mm * high 50mm.The container fixed position of the structure of following change high-pressure bottle and cleaning object thing is cleaned, 1. liquid gas introducing port＜cleaning object thing＜liquid gas outlet, 2. liquid gas introducing port〉the cleaning object thing〉liquid gas outlet, 3. liquid gas introducing port＜liquid gas outlet＜cleaning object thing, 4. cleaning object thing＜liquid gas introducing port＜liquid gas outlet, 5. cleaning object thing＜liquid gas outlet＜liquid gas introducing port, 6. liquid gas outlet＜liquid gas introducing port＜cleaning object thing.At 100 shells of each self-cleaning of each matting, and analyze.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared spectrophotometry method).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) for particulate.It is the results are shown in table 5.
Table 5
Container structure and cleaning object object location The oil residues component Particulate loading
????① 0.1mg/100 it is individual 30
????② 0.7mg/100 it is individual 150
????③ 0.8mg/100 it is individual 180
????④ 1.5mg/100 it is individual 240
????⑤ 0.9mg/100 it is individual 210
????⑥ 1.8mg/100 it is individual 310
Can know that from above result the container fixed position of the structure of high-pressure bottle and cleaning object thing is, when liquid gas introducing port＜cleaning object thing＜liquid gas outlet, can by prevent pollutant again adhesion effect improve cleaning performance.
Embodiment 6
Whether relevant with the degree of depth or the shape of recess configuration in order to investigate, the shape or the degree of depth that change recess configuration are inquired into cleaning performance.Cleaning is used carbon dioxide with liquid gas.Adopt in the cleaning method of inquiring among the embodiment 1 the most effective matting 6. " change pressure under steady temperature carries out overcritical cleaning after the state variation of 5 gaseous states and liquid condition repeatedly " clean.Parts are shells of being processed into through pressure forming, are shaped as 1. vertical 5mm * horizontal 30mm * high 50mm, 2. vertical 5mm * horizontal 10mm * high 5mm, 3. vertical 3mm * horizontal 5mm * high 20mm, 4. φ 10.8mm * high 5mm, 5. φ 5mm * high 5mm.At 100 shells of each self-cleaning of each matting, and analyze.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared spectrophotometry method).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.It is the results are shown in table 6.
Table 6
Matting The oil residues component Particulate loading
????① 0.1mg/100 it is individual 36/cm 2
????② 0.2mg/100 it is individual 30/cm 2
????③ 0.2mg/100 it is individual 35/cm 2
????④ 0.1mg/100 it is individual 32/cm 2
????⑤ 0.2mg/100 it is individual 35/cm 2
Can see from above result, no matter how shell shape all has cleaning performance.Thereby, can know, irrelevant, all capable of washing with shell shape.
Embodiment 7
Discussion is through the matting of the shell of pressure forming processing and machining.Cleaning is used carbon dioxide with liquid gas.Be that material is SUS304, is of a size of φ 2mm, highly is the shell with recess configuration of 5mm.Use this shell measure variation according to residue (oil content) amount of different cleanings and particulate loading, oxide, according to the wetability of contact angle determination.Cleaning has been discussed following 4 kinds of operations, 1. use carbon dioxide change pressure under steady temperature, turn to the cleaning of supercriticality after the state variation of 5 gaseous states and liquid condition repeatedly, 2. after cleaning 1., discharge carbon dioxide, and importing water, clean at 200 ℃, 5MPa, 3. after cleaning 1., in carbon dioxide, import water, clean at 200 ℃, 5MPa, 4. only in 200 ℃, 5MPa water, clean.At 100 shells of each self-cleaning of each matting, and analyze.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared spectrophotometry method).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.
Also have, be to use ESCA (x-ray photoelectron optical spectroscopy) to measure (judgment standard of oxide is, is 1 with the oxide peak intensity of initial value (after the ungrease treatment), and the oxide peak intensity after each is cleaned is used than value representation) about the variation of oxide.
Also have, measure about the automatic contact angle meter CA-Z type that contact angle is to use consonance surface chemistry (strain) to make.Contact angle is generally as the index of expression material surface to the affine degree (compatibility or wetability) of liquid.As shown in Figure 8, contact angle is meant at solid, liquid, gas three phase boundary, formed angle between the tangent line of drop and the solid face, and liquid is good more to the compatibility on surface, and contact angle is more little.
It is the results are shown in table 7.Oxide amount is 1. to be 1 to carry out standardization with matting.Also have, contact angle is to measure as liquid with pure water.
Table 7
Matting The oil residues component Particulate loading Oxide amount Contact angle
????① 0.2mg/100 it is individual 30/cm 2 ????1 58 degree
????② 0.1mg/100 it is individual 22/cm 2 ????0.2 19.3 degree
????③ 0.1mg/100 it is individual 25/cm 2 ????0.05 24.2 degree
????④ 0.4mg/100 it is individual 35/cm 2 ????0.1 31.2 degree
Can confirm that from above result by the matting of combined carbon dioxide and 200 ℃, 5MPa cleaning of water, can remove oil content and inorganic system oxide, further contact angle is also little, can improve wetability.
The 1st embodiment according to the present invention cleans by with the cleansing medium of liquid gas or supercritical fluid parts with recess configuration etc. being cleaned thing, can improve cleaning performance.
The 2nd embodiment
Then, with reference to Figure 29, the meaning of pressure fluid, the especially supercriticality used in the present invention's the 2nd embodiment is described.
The 2nd embodiment is to consider to utilize the material of removing in the 1st embodiment again.That is, in the cleaning of in the past using overcritical or subcritical state fluid, carried out various researchs for improving cleaning performance.For example, disclose a kind of method that changes the state of overcritical or subcritical state fluid rapidly.But the violent state variation of these fluids can bring physical property to impact to the cleaning object thing, therefore causes part distortion sometimes, even can produce breach when serious.The parts of especially low density parts or thin plate and formation labyrinth recess are very easy to be subjected to it to influence.
On the other hand, through the processing component of pressure forming processing especially electronic unit, use a large amount of lubricating oil in order to improve precision.Therefore, containing a large amount of lubricating oil principal components in the cleaning fluid of processing back part is the hydro carbons organic matter.And the purpose of lubricating oil is for improving machining accuracy, so also contain organic matter such as surfactant except the hydro carbons organic matter.But, just can't the separating hydrocarbons organic matter and organic matter such as surfactant by common cleaning, can't utilize again.
Also have, purging system is very expensive, and the cost scavenging period, and therefore, the main cleaning thing of using is very expensive and reusable parts such as mould.
The the 2nd and the 3rd embodiment is exactly in order to address these problems.
The cleaning method that utilizes pressure fluid of the present invention, be to be cleaned thing by fluid after the pressurization is contacted with, removal is characterized in that attached to the method for the impurity that is cleaned the thing surface: change its fluid density under the condition that does not change with the phase that is cleaned the pressure fluid that thing contacts.
Especially, even the density that is cleaned thing below the fluid density of fluid, also can make fluid density for the density that is cleaned thing repeatedly just, to obtain cleaning performance by the pressure that changes fluid, at least one condition in the temperature.At this moment, when pressure fluid was supercritical fluid, effect improved.
Also have, the cleaning method that utilizes pressure fluid of the present invention is a kind ofly to be cleaned thing and to contact with pressure fluid to remove attached to the above-mentioned cleaning method that is cleaned the impurity on thing surface by making, it is characterized in that: for the above-mentioned thing that is cleaned that is impregnated in pressurization the 1st fluid, pressurization the 2nd fluid that makes density be different from above-mentioned the 1st fluid contacts and cleans.At this moment, under the condition of the phase that does not change the 1st fluid, the above-mentioned thing that is cleaned is contacted with above-mentioned the 2nd fluid.
At this moment, can obtain desirable effect during for supercritical fluid when the 2nd fluid.Especially, by being cleaned thing density below the fluid density of the 1st fluid, and, can improve cleaning performance by density is contacted with being cleaned thing less than the 2nd fluid that this is cleaned thing density.Also have, the 1st fluid is identical with the 2nd fluid, and the 1st fluid is a liquid, and the 2nd fluid can obtain desirable especially effect during for supercritical fluid.
In the cleaning method that utilizes pressure fluid of the present invention, preferred used fluid contains and is selected from least a in carbon dioxide, water, ammonia, suboxides carbon, the alcohol, can obtain better effect like this.
Also have, when being lubricating oil attached to the suitable impurity that is cleaned the thing surface of the present invention, better effects if.Further, when being suitable for better effects if when being cleaned thing and being parts of the present invention with recess configuration.
At first, the 2nd embodiment is described.
Figure 29 represents the state diagram of carbon dioxide or water or other fluid (liquid).Transverse axis is represented temperature among Figure 29, and the longitudinal axis is represented pressure.Temperature is that critical temperature Tc 102 and pressure are that the point (Tc, Pc) of critical pressure Pc103 is for critical point 101.Temperature critical temperature Tc more than 102 and the scope of pressure more than critical pressure Pc103 be supercriticality 104.During this supercriticality 104, fluid is the phase different with gas 105, liquid 106, solid 107.As everyone knows, this supercriticality demonstration is different from the character of gas, liquid, solid etc., and is fluid.For example, the density of the fluid of supercriticality is in the value in the middle of gas and the liquid, can be regulated by temperature and pressure condition.Also have, supercriticality is not only density, during cleaning, also can control ionic product, dielectric constant, diffusion etc., therefore can be used as the method that obtains high cleaning performance.
Further, about cleaning, the density of liquid condition is very big, is effective fluid for cleaning therefore, according to circumstances uses liquid condition sometimes.Also having, will not be to be supercriticality and be in liquid condition higher temperature, high-pressure area, that pressure, temperature conditions are similar to supercriticality and be called the subcritical region state sometimes, and this fluid under pressure state also can be used for cleaning.
Here, be about 31.1 ℃ as critical temperature Tc 102 as the carbon dioxide of fluid, the critical pressure Pc103 of carbon dioxide is about 7.38MPa.The situation of water is, critical temperature Tc 102 is about 374.3 ℃, and critical pressure Pc103 is about 22.1MPa.
The preferred normal temperature and pressure of fluid down is the material of gas, can use carbon dioxide, water, ammonia, suboxides carbon etc., can use also in addition that to improve temperature a little be volatilizable alcohol.Wherein, carbon dioxide and water are harmless, and operability might as well.In addition, carbon dioxide has to decompose in critical condition removes organic effect, and glassware for drinking water has effects such as etching oxide, therefore by bringing into play characteristic separately, effectively cleans the parts with recess configuration.
The cleaning method of the present invention's the 2nd embodiment preferably is applicable to the parts with recess configuration.These parts adhere to processing oil such as lubricating oil or impurity (cutting swarf etc.) at recess especially easily.Also have, the structure that this recess partly is into adds the part of exerting pressure man-hour, therefore partly compare with other smooth structures, and the tack height of lubricated wet goods processing oil, and cleaning agent etc. is difficult to soak into, and cleans spot, wash residue so generate easily.Therefore, the permeability height, have certain viscosity, deliquescent liquid condition (comprising subcritical fluids) or a supercriticality pressure fluid effective during as cleansing medium.
Then, the cleaning method that uses the present invention's the 2nd embodiment pressure fluid is described.
The cleaning method of the present invention's the 2nd embodiment is, by making pressure fluid and being cleaned thing and contacting to remove cleaning method attached to the impurity that is cleaned the thing surface, do not change with the condition that is cleaned the pressure fluid phase that thing contacts under, the density that changes this fluid is cleaned.Especially when being cleaned thing density when the fluid density of fluid is following, by controlling the density of this fluid, change is applied to the buoyancy that is cleaned thing.Thus along with fluid density for being cleaned thing density height repeatedly, make to be cleaned thing and in fluid, to move up and down, produce mixing effect.At this moment, when pressure fluid is the supercriticality fluid, except density is changed significantly preferred, also have the variable density of following simultaneously, dielectric constants etc. change, and cause effects such as dissolubility variation.
For example, carbon dioxide is at 0.1MPa, the density of gas is about 1kg/m 30 ℃ the time 3, and during liquid at 30 ℃～15 ℃ about 600～1600kg/m 3Though, different during supercriticality because of the temperature and pressure condition, more than critical pressure, can be controlled in about 200kg/m 3To 1000kg/m 3More than.Thereby, be cleaned thing and preferably have this density range.
The density that is cleaned thing is preferably at 200kg/m 3To about 1500kg/m 3Scope, when using the supercriticality fluid, the density that is cleaned thing is preferably at 200kg/m 3To about 1000kg/m 3Scope.As being cleaned thing, can be suitable for parts that resin-formed body or inner light material with hollow structure constitute etc.As being cleaned thing, as with epoxy resin etc. fixedly the parts of Hollow Glass Sphere as the sound equipment matching block of ultrasonic sensor, but during moulding since Hollow Glass Sphere such as machining can be cut off or be come off and form the recess configuration of bead size at finished surface.That recess configuration is of a size of is wide, the degree of depth reaches a few μ m to hundreds of μ m, and its inside entered and add the sheet glass that cuts off man-hour, therefore cleans with simple dipping to be difficult to removal.Also have, the oil residues composition during processing and forming also is present in surface or inside sometimes.When cleaning these pollutants, can bring into play effect of the present invention.But the material that can be suitable for is not limited thereto.
Figure 30, Figure 32, Figure 33 are the skeleton diagram of the cleaning device of the cleaning method that adopts the present invention's the 2nd embodiment.Especially Figure 32 and Figure 33 are the density according to fluid 380, and closed state is removed and removed impurity 381 easily when being cleaned thing 214 and lightening, the schematic diagram when this process utilizes mixing effect to clean repeatedly.
The main composition key element of this device is, one example of rinse bath is a pressure vessel 210, reclaim the separation container 220 of impurity 381, the high pressure tank (or jar) 201 of supplying with fluid 380 and liquid pump 202 and, the thermoregulator 204 of fluid 380 and control each vessel temp temperature control equipment 211,221 and, the pressure control device 230 of controlled pressure control valve 203,213,223.
Fluid 380 uses carbon dioxide, is cleaned epoxy cure formed body (the about 550kg/m of density that thing 214 uses Hollow Glass Sphere 3), describe.Put into implement 212 being cleaned thing 214, be set in the pressure vessel 210, regulate the temperature and pressure condition, in pressure vessel 210, import fluid 380 with liquid pump 202 with thermoregulator 204, pressure-control valve 203.Pressure vessel 210 uses container to control cleaning conditions with temperature control equipment 211 and pressure control device 230.
Carbon dioxide is admitted to pressure vessel 210 as about 47 ℃, the supercriticality fluid 380 of about 12MPa.Density at this condition carbon dioxide is about 600kg/m 3, therefore, being cleaned thing 214 becomes the state that floats over CO 2 fluid in pressure vessel 210.If from this original state controlled pressure under steady temperature, then the density of fluid 380 becomes 500kg/m under about 10Mpa 3, become lighter than the density that is cleaned thing 214, therefore be cleaned thing 214 and begin to sink.Also have, control temperature from original state under constant pressure, then the density of fluid 380 becomes 500kg/m at about 55 ℃ 3, become lighter than the density that is cleaned thing 214, therefore be cleaned thing 214 and begin to sink.By controlled pressure or temperature or both, improve or reduce the density of fluid 380, can make to be cleaned thing 214 and in fluid 380, to rise or sink (with reference to Figure 33), the raising mixing effect improves cleaning performance.Thus, as the impurity 381 of the lubricated wet goods composition that is soluble in the supercriticality carbon dioxide, can easily remove from recess or narrow effective stripping of being cleaned thing 214.Also have,, then can easily remove from recess or narrow extruding of being cleaned thing 214 as the impurity 381 of the compositions such as cutting powder of glass that is insoluble in the supercriticality carbon dioxide or resin.
When the density of density that is cleaned thing 214 and fluid 380 is roughly the same, come stirred fluid 380 by rotation agitating auger oar 383 under the action control of pressure control device 230 equal controllers, can with variable density in the same manner, change is applied to the buoyancy that is cleaned thing 214, thereby obtains cleaning performance as mentioned above.This is a kind of height state that does not lean on above-mentioned density, but makes both density very close, easily removes the example that is cleaned the driving fit between the thing 214 under other principle effects.According to this method, the height state of the density of fluid (pressure, temperature) repeatedly, condition control is easy.
Also have, conduct in addition utilizes the mechanicalness change of external force, except mechanical agitation, also can implement by the nozzle ejection of fluid, therefore Figure 31 described later has represented the example of composite fluid nozzle ejection at Figure 36 as the example that is applicable to cleaning device in the present invention's the 3rd embodiment.In addition among Figure 36, the 400th, for parts (the being cleaned thing) information database of the cleaning condition that changes each parts.That is,, when the density of density that is cleaned thing 214 and fluid 380 is roughly the same, utilize nozzle ejection easily to remove the driving fit that is cleaned between the thing 214 based on the information in the information database 400.According to this method, the height state of the density of fluid (pressure, temperature) repeatedly, condition control is easy.
Also have, in this method, by make the density that is cleaned thing 214 and pressure fluid 380 roughly the same in original state, only change pressure or temperature conditions can make and be cleaned thing 214 and fluctuate in pressure fluid a little.Also have, represented to control the example of the condition of whole pressure vessel 210 among Figure 30, but also can near being cleaned thing 214, heater be set, be cleaned near the thing 214 temperature, only reduce the density at this place, make to be cleaned thing 214 and to sink by raising.These conditions can suitably be selected to use according to waiting attached to the dopant species that is cleaned thing 214.Except this method effect, if at the pressure vessel 210 outside or inner members that auxiliary mixing effect is set, effect will be better.As these members, can suitably select to use the wheeled rabbling mechanism of pivoting leaf or by agitating member of ultrasonic oscillator etc.
Contain from the supercriticality carbon dioxide that is cleaned the impurity that thing 214 removes and will send into separation container 220, controlled pressure is got back to gaseous state to reduce the pressure of supercriticality carbon dioxide.At this moment, the impurity that is dissolved in carbon dioxide is followed solubility to descend and is separated, thereby reclaims as wash residue 222.Also have, the impurity 381 that is insoluble to carbon dioxide reclaims sedimentation as wash residue 222.By reclaiming impurity 381, can prevent to be attached on the parts again with other containers that are different from pressure vessel 210.
Fluid is the form with the gaseous state exhaust among Figure 30, but also can cool off this gaseous state carbon dioxide and send into the liquid pump and pressurize once again, re-uses.Therefore, can provide the continuity cleaning device.
The 3rd embodiment
The cleaning method of the present invention's the 3rd embodiment then, is described.
The 3rd embodiment of the present invention also is a kind of by pressure fluid is contacted removing the cleaning method attached to the impurity that is cleaned the thing surface with being cleaned thing, improves cleaning performance under the condition that does not change with the phase that is cleaned the thing fluid in contact.In this method, do not change the phase of the 1st fluid, make the 2nd fluid and be cleaned thing and contact and obtain especially excellent effect.For being impregnated into above-mentioned the be cleaned thing of pressurization in the 1st fluid, be in contact with it by pressurization the 2nd fluid that makes density be different from the 1st fluid, utilize the injection that is cleaned portion or foam waited and improve mixing effect.
Further, when the 2nd fluid is the supercriticality fluid, be cleaned thing,, can effectively remove the impurity of the parts depths that is difficult to clean by improving the diffusivity of supercritical fluid for parts with recess or narrow portion etc.At this moment, when pressure fluid is the supercriticality fluid, preferred, also have the variable density of following simultaneously greatly except making variable density, dielectric constant etc. change, and cause effects such as dissolubility variation.
Also have, when the 1st fluid is identical with the 2nd fluid, the 1st fluid is a liquid, when the 2nd fluid is supercritical fluid, can obtain especially good effect.Though improve cleaning performance when two fluids can not utilize both deliquescent differences simultaneously, the advantage when two fluids are identical is, can utilize the fluid after the cleaning again, so need not separation of the fluid, can carry out high efficiency washing.In addition, identical with the 2nd embodiment when the density that is cleaned thing is lower than the 1st fluid and is higher than the 2nd fluid, the 2nd fluid contacts and controls buoyancy with being cleaned thing, to bring mixing effect, therefore can improve cleaning performance.
Figure 31 is the skeleton diagram of cleaning device that carries out the cleaning method of the present invention's the 3rd embodiment.The main composition key element of this device is, rinse bath is a pressure vessel 310, reclaim separate impurities container 320, supply with the high pressure tank (or jar) 301 of the 1st fluid and liquid pump 302 and, the thermoregulator 304 of the 1st fluid and control each vessel temp temperature control equipment 311,321 and, the pressure control device 330 of controlled pressure control valve 303,313,323.Here, use to supply with the high pressure tank (or jar) 341 of the 2nd fluid and liquid pump 342 and, the thermoregulator 344 of the 2nd fluid and the pressure control device 330 of controlled pressure control valve 343, the contact of the 2nd fluid is cleaned near the thing 314.
Fluid uses carbon dioxide, is cleaned thing 314 and uses the pressure forming processing component with recess of shape for hat SUS (stainless steel) shell representative or the parts that formed by the machining method, describes.Be cleaned thing 314 and put into implement 312, and will be set in the pressure vessel 310, in pressure vessel 310, import the fluid of having regulated the temperature and pressure condition by thermoregulator 304, pressure-control valve 303 with liquid pump 302.Pressure vessel 310 uses container to control cleaning conditions with temperature control equipment 311 and pressure control device 330.Carbon dioxide is sent into pressure vessel 310 with liquid condition, and dipping is cleaned thing 314, is used for cleaning.In addition, for in the pressure vessel 310 have a recess configuration be cleaned thing 314, use to supply with the high pressure storage tank (or jar) 341 of the 2nd fluid and liquid pump 342 and, the thermoregulator 344 of the 2nd fluid and the pressure control device 330 of controlled pressure control valve 343, by ejection portion 345 to being cleaned near the thing 314 contact as the supercriticality carbon dioxide of the 2nd fluid.
The thing 314 that is cleaned with recess configuration is configured in the pressure vessel 310, utilizes the 2nd fluid to promote cleaning performance when being cleaned in the 1st fluid.When the ejection portion 345 of the 2nd fluid is provided with towards the peristome that is cleaned thing 314, can easily proceed to the depths that is difficult to clean.Can think as effect, mixing effect that the diffusion that is caused by contact different densities fluid etc. brings and the removal effect of peeling off of following it for impurity, the dissolving removal effect that the different solubilities fluid brings to impurity with different solubilities, when two fluids have pressure differential, the vibrating effect that the equalization of pressure impact brings etc. plays a role, thereby quickens cleaning performance.Thus, be soluble in the lubricated wet goods composition recess or the also effectively stripping removal of narrow portion from being cleaned thing easily of fluid.Also have, be insoluble in compositions such as the glass of fluid or cutting powder and then peel off or push removal from the recess or the narrow portion that are cleaned thing easily.At this moment, the time that makes the 2nd fluid contact can be that continuity also can be intermittent, can be that constant speed also can be a speed change, can be according to being cleaned setting such as thing.
Also have, when being cleaned thing 314 density and being lower than the liquid condition density of the 1st fluid,,, can improve cleaning performance by the acquisition mixing effect that moves up and down that is cleaned thing as identical with the 2nd embodiment by the 2nd fluid of contact different densities.
Also have, contain from the 1st fluid that is cleaned the impurity that thing 314 removes and the fluid that the 2nd fluid mixes and will send into separation container 320, controlled pressure or temperature are separated fluid-mixing and when reclaiming, are separated and reclaim wash residue 322.But each self-pressurization of each fluid that separates is with recycling.Also have,, then can simplify cleaning device and cleaning operation if the 1st is identical with the 2nd fluid.
By the cleaning method of the present invention the 2nd and the 3rd embodiment and the parts of cleaning device acquisition cleaning performance mainly is electronics electronic components associated therewith and associated components thereof.Especially by the Precision Machining parts of pressure forming processing and machining.These parts must use lubricated wet goods processing oil in order to improve machining accuracy.But the residual processing that will influence subsequent processing of this processing oil is handled or bonding etc. Performance Characteristics as plating, causes the Performance And Reliability of device and goods to reduce.Therefore, to the removing residues of high level, promptly need accurate parts performance effect of cleaning.Application component comprises the matching layer of ultrasonic sensor or the electrode of battery (especially secondary cell etc.).Also have in addition battery case, HDD with shell (also being called framework) or electrolytic capacitor with shell etc.Ultrasonic sensor is inorganic with uses such as matching layers to be the compounding substances of glass marble and organic system epoxy resin, and inorganic is various materials such as glass marble, organic system epoxy resin.Also have, ultrasonic sensor is stainless steel, aluminium, epoxy resin with the material of shell etc.The deep drawing utilize pressure forming processing or resin forming, machining are adopted in processing.Battery case generally uses aluminium, perhaps uses the multilayer steel that aluminium carried out plating recently, by the pressure forming processing and fabricating.HDD uses aluminium with sheathing material, uses the bimetal that aluminium is carried out the organic system coating recently, carries out pressure forming processing.Electrolytic capacitor with shell too, material uses the aluminium monomer or apply the compound copper coin of organic membrane coat on aluminum, carries out pressure forming processing.Like this, use the gaseous species of cleansing medium etc. by selection operation or conduct, can also be applied to the organic matter of lamination different materials and the composite of inorganic matter.But be not limited to these goods fields, also effective to the parts of processing by pressure forming processing and machining certainly with recess configuration.
Illustrate the of the present invention the 2nd and the effect of the 3rd embodiment according to specific embodiment below.
Embodiment 8
With epoxy resin impregnated Hollow Glass Sphere (about 30 μ m) and be heating and curing, this formed body machining is become given component shape, clean then.Component shape is diameter phi 10.8mm * high 1.15mm, and density is 550kg/m 3These parts exist the many places Hollow Glass Sphere to cut off or come off and the recess configuration of the bead size that forms at machined surface.
Estimate cleaning performance according to visual examination and mensuration attached to the non-solubility particulate loading on surface.Whether visual examination is that range estimation is confirmed jagged, crackle etc., and particulate is with light microscope in kind and sem observation parts surface and recess inside whether impurity to be arranged after cleaning.
Cleaning be above-mentioned parts separately 100 put into basket shape implement, use carbon dioxide as fluid.According to following cleaning method relatively.
(1) do not clean; (2) be immersed in supercriticality carbon dioxide (about 57 ℃, 13MPa, the about 550kg/m of density 3) in after, with 10 minutes boosting and step-down between 12MPa and 14MPa repeatedly at interval, cleaned 3 hours; (3) at supercriticality carbon dioxide (about 47 ℃, 12MPa, the about 600kg/m of density 3) in dipping cleaned 3 hours; (4) at liquid condition carbon dioxide (about 20 ℃, the about 750kg/m of density 3) the middle dipping after 1 hour, under above-mentioned (2) condition, clean; (5) at supercriticality carbon dioxide (about 47 ℃, 12MPa, the about 600kg/m of density 3) middle dipping is after 1 hour, open rapidly pressure makes and becomes gaseous state in the container under steady temperature, should operate 3 times repeatedly, and wash result is shown in table 8.
Table 8
Cleaning method Outward appearance Particulate
????(1) ????○ * visual observations
????(2) ????○ ????○
????(3) ????○ * visual observations (part)
????(4) ????○ * SEM observes
????(5) ????× ????○
Can know during this parts, even clean, if as (3), (4) only parts be immersed in simply carbon dioxide pressurized in, then especially the cleaning performance to the carbon dioxide insoluble substance is low for impurity.This is because parts float on the fluid, so overlapping between the parts, and this lap fails to separate, and can't clean.Can also know,, then be difficult to the impurity of the small recess depths of removing component if only be contacted with fluid.Can also know that when producing rapidly fluid phase change as (5), though impact the removal that promotes impurity by it, low density parts have produced breach and crackle because of collision between the parts.
With respect to this, can know in the cleaning method of the present invention (2) and can clean to recess well.The generation reason of this effect can know that by observing pressure vessel inside because the variation of carbon dioxide pressurized density, parts move up and down, thereby contact-making surface separates, and follows its mixing effect simultaneously in addition.
Embodiment 9
Shell to pressure forming processing and machining cleans.Material is SUS304, is the shell with recess configuration that is of a size of φ 12mm, high 5mm.
Per 100 shells are cleaned and analyze, divide according to visual examination, oil residues and check, reach to measure and estimate cleaning performance attached to the non-solubility particulate loading on surface.Whether visual examination is that range estimation is confirmed jagged, crackle etc.Residual oil content analysis is with behind solvent (carbon tetrachloride) the extraction oil content, measures its extraction oil content with FT-IR (Fourier transform infrared spectrophotometry method).Also have,, clean the back and measure with particulate inspection machine (the wafer surface testing fixture WM-1700/1500 that ToPcon makes) to particulate.
During cleaning, above-mentioned parts separately 100 put into basket shape implement, use carbon dioxide to do when only using a kind of fluid.Also have, when using two kinds of fluids, use the liquid condition carbon dioxide, use the supercriticality carbon dioxide as the 2nd fluid as the 1st fluid.Following cleaning method is compared.
(1) in liquid condition carbon dioxide (about 20 ℃), under the state of dipping, supercriticality carbon dioxide (about 47 ℃, 12MPa) is sprayed and touches on the parts, cleaned 3 hours; (2) dipping cleaning 3 hours (3) is flooded after 1 hour in liquid condition carbon dioxide (about 20 ℃) in supercriticality carbon dioxide (about 47 ℃, 12MPa), cleans with above-mentioned (2) condition; (4) dipping is after 1 hour in supercriticality carbon dioxide (about 47 ℃, 12MPa), and open rapidly pressure makes and becomes gaseous state in the container under steady temperature, should operate 3 times repeatedly, and wash result is shown in table 9.
Table 9
Cleaning method Outward appearance Oil residues component (mg/100 parts) Particulate loading is (individual/cm 2)
????(1) ??○ ????0.1 ????35
????(2) ??○ ????0.3 ????100
????(3) ??○ ????0.2 ????100
????(4) * (wound is arranged) ????0.2 ????30
Any method all be can't see because of oil content adheres to the appearance color change that causes, by using the carbon dioxide pressurized oil residues component that reduces.But, can know that then the effect to the carbon dioxide particulate matter is little if only clean by dipping.Especially can observe and obtain being present in recess configuration inside.With respect to this, can know in cleaning method of the present invention (1) and can clean removal impurity well.
According to the present invention, the density by the control pressure fluid also is cleaned thing with parts with recess configuration etc. and contact, can according to the solvent effect of pressure fluid effectively removal be dissolved in the lubricated wet goods impurity of fluid.Further, bring into play mixing effect, can effectively remove the impurity that is insoluble to fluid by the control and the density of parts fluid in contact.Thereby, in the cleaning treatment of the present invention,, can give the solvent effect and the mixing effect of pressure fluid simultaneously by selecting to be suitable for the optimal clean condition of parts, effectively therefore cleaning part, has bigger industrial value.
Also have, the technology that is used to remove above-mentioned driving fit by application, for surface modification is removed bonding between object being treated and the object being treated, thereby can handle the object being treated surface equably, can be applied to form hydroxyl etc. hydrophilic treated, handle and at aspects such as surface coating other materials by hydrophobic treatment, the oleophobic of surfactant.In addition,, as spray in the shell of the 2nd fluid,, can obtain effectively to carry out the effect of surface modification by in this fluid, adding inorganic agent about surface modification.Also have, in order to extract by removing bonding between object being treated and the object being treated, can be from the inner effectively extraction component of object being treated, be applicable to the oil extraction of lubricated wet goods, from the extract extraction of plant etc., spices extraction etc.
Utilized in the above-mentioned surface modification, by to as the shell of cleaning treatment thing with as the lubricating oil and the CO of impurity 2Pressurize, make CO as fluid 2Become and have the characteristic of compatibility (solubility raising) with lubricated wet goods lubricant component.
Pass through to change CO in the above-mentioned extraction 2Temperature and pressure, remove the driving fit between the molecule on the microcosmic, make its dissolving on the macroscopic view, the object that changes extraction is to CO 2Solubility (in other words, change CO as solvent 2Density), utilize the object of this characteristic dissolution extraction in solvent after, reduce temperature and pressure, separate out the extracted object thing, extracted.
By any embodiment in the above-mentioned various embodiments of appropriate combination, can bring into play the effect that has separately.
The present invention has carried out abundant record with reference to accompanying drawing to preferred implementation, but the relevant skilled person of this technology can carry out various distortion or correction obviously.These distortion or only revise otherwise exceed the scope of the invention of additional claim explanation then are interpreted as being included in wherein.

Claims (29)

1. cleaning method, removing attached to parts (27 with recess configuration, 28,29,30, in the cleaning method of the attachment (26) on above-mentioned at least recess configuration surface 32), by the above-mentioned parts that are attached with above-mentioned attachment are put into rinse bath (1), in said washing groove, feed cleansing medium, above-mentioned parts are in the above-mentioned cleansing medium atmosphere, change the temperature of above-mentioned cleansing medium, pressure, above-mentioned cleansing medium is carried out the state variation that liquid condition and gaseous state replace, make cleansing medium spread over above-mentioned recess configuration surface and clean.
2. as the cleaning method of claim 1 record, above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace after, above-mentioned cleansing medium is become the cleaning that supercriticality is carried out above-mentioned recess configuration surface.
3. as the cleaning method of claim 1 record, above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace after, above-mentioned cleansing medium is become the cleaning that subcritical state carries out above-mentioned recess configuration surface.
4. as the cleaning method of claim 1 or 2 records, above-mentioned cleansing medium is changed pressure from liquid condition under steady temperature, alternate repetition gaseous state and liquid condition are carried out state variation.
5. as the cleaning method of claim 1 or 2 records, above-mentioned cleansing medium is changed pressure under steady temperature, alternate repetition gaseous state and liquid condition are carried out state variation.
6. cleaning method, removing attached to parts (27 with recess configuration, 28,29,30, in the cleaning method of the attachment (26) on above-mentioned at least recess configuration surface 32), by the above-mentioned parts that are attached with above-mentioned attachment are put into rinse bath (1), in said washing groove, feed the 1st cleansing medium, above-mentioned parts are in above-mentioned the 1st cleansing medium atmosphere, change the temperature of above-mentioned the 1st cleansing medium, pressure, above-mentioned the 1st cleansing medium is changed to supercriticality, after the above-mentioned surface that makes above-mentioned the 1st cleansing medium spread over above-mentioned recess configuration was cleaned, the liquid that further is used as the 2nd cleansing medium carried out liquid to above-mentioned parts and cleans.
7. as the cleaning method of record among any of claim 1～3, above-mentioned cleansing medium is carbon dioxide or water.
8. as the cleaning method of claim 6 record, above-mentioned the 1st cleansing medium is a carbon dioxide, and above-mentioned the 2nd cleansing medium is a water, and the water as above-mentioned the 2nd cleansing medium is changed to the above-mentioned surface that supercriticality is cleaned above-mentioned recess configuration.
9. cleaning device, possess rinse bath (1) and, to said washing groove supply with cleansing medium cleansing medium supply unit (3) and, give above-mentioned cleansing medium variations in temperature heater (5) and, give pressue device (3) that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device (1000), by controlling above-mentioned heater, at least one side of pressue device, after above-mentioned cleansing medium carried out state variation that liquid condition and gaseous state replace, cleansing medium is changed to supercriticality or subcritical state, the recess configuration surface of said washing groove inner part is cleaned.
10. cleaning device, possess outlet (1b) with the introducing port (1a) that imports cleansing medium and discharge cleansing medium and take in cleaning object thing (31) rinse bath (1) and, through above-mentioned introducing port to said washing groove supply with above-mentioned cleansing medium cleansing medium supply unit (3) and, give above-mentioned cleansing medium variations in temperature heater (5) and, give pressue device (3) that above-mentioned cleansing medium pressure changes and, control above-mentioned cleansing medium supply unit, heater, the control device of pressue device (1000) and, the recoverer (8) of the removal material after the cleansing medium that recovery is discharged from above-mentioned outlet cleans with collection, by controlling above-mentioned heater, at least one side of pressue device, the above-mentioned cleaning object thing with recess configuration that is accommodated in said washing groove is adopted supercritical gas or liquid gas, making cleansing medium spread over above-mentioned recess configuration surface cleans, be arranged to the downside that above-mentioned introducing port is positioned at above-mentioned outlet simultaneously, above-mentioned outlet is positioned at the upside of cleaning object thing.
11., have the tectosome of parts for forming of recess configuration by pressure forming or machining method as the cleaning method of record among any of claim 1～3.
12. as the cleaning method of record among any of claim 1～3, have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of metal material.
13. as the cleaning method of claim 12 record, the principal component that forms the metal material of the parts with above-mentioned recess configuration is made of Fe, Al, Cu or Ti.
14. as the cleaning method of record among any of claim 1～3, have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of organic material.
15. as the cleaning method of claim 14 record, the principal component that forms the organic material of the parts with above-mentioned recess configuration is made of polyimides or epoxy resin.
16. as the cleaning method of record among any of claim 1～3, have the tectosome of parts for being formed by pressure forming processing method or machining method of above-mentioned recess configuration, above-mentioned tectosome mainly is made of ceramic material.
17. as the cleaning method of claim 16 record, the principal component of ceramic material that forms the parts with above-mentioned recess configuration is by SiO 2, PZT, Ag or C constitute.
18. as the cleaning method of record among any of claim 1～3, the parts with above-mentioned recess configuration are mainly by the complex of metal and organic material, mainly be made of the complex of organic material and ceramic material or main complex by metal and organic material and ceramic material.
19. as the cleaning method of record among any of claim 1～3, the parts with recess configuration are ultrasonic sensor with matching layer or electronic component-use, ultrasonic sensor with, battery with, hard disk drive is used, electrolytic capacitor is used various shells.
20. cleaning method that utilizes pressure fluid, by making pressure fluid (380) and being cleaned thing (214) and contacting to remove in the cleaning method attached to the above-mentioned impurity (381) that is cleaned the thing surface, the above-mentioned density of thing that is cleaned is below the fluid density of above-mentioned fluid, by the pressure that changes above-mentioned fluid, at least one condition in the temperature, above-mentioned repeatedly fluid density is for the above-mentioned height that is cleaned thing density, and the above-mentioned thing that is cleaned is contacted with above-mentioned fluid.
21. cleaning method that utilizes pressure fluid, by making pressure fluid (380) and being cleaned thing (214) and contacting to remove in the cleaning method attached to the above-mentioned impurity (381) that is cleaned the thing surface, the above-mentioned density of thing that is cleaned is below the fluid density of above-mentioned fluid, by the pressure that changes above-mentioned fluid, at least one condition in the temperature, make under the approaching state of the above-mentioned fluid density that is cleaned thing density and above-mentioned fluid, give above-mentioned fluid change by external force, and the above-mentioned thing that is cleaned is contacted with above-mentioned fluid.
22. as the cleaning method that utilizes pressure fluid of record among claim 20 or 21 any one, above-mentioned fluid is a supercritical fluid.
23. cleaning method that utilizes pressure fluid, by making pressure fluid and being cleaned thing and contacting to remove in the cleaning method attached to the above-mentioned impurity that is cleaned the thing surface, for the above-mentioned thing that is cleaned that is impregnated in pressurization the 1st fluid, pressurization the 2nd fluid that makes density be different from above-mentioned the 1st fluid contacts when cleaning, do not change the phase of above-mentioned the 1st fluid, above-mentioned the 2nd fluid is contacted with the above-mentioned thing that is cleaned.
24. as the cleaning method that utilizes pressure fluid of claim 23 record, above-mentioned the 2nd fluid is a supercritical fluid.
25. the cleaning method that utilizes pressure fluid as record among claim 23 or 24 any one, the above-mentioned density that is cleaned thing contacts less than above-mentioned above-mentioned the 2nd fluid that is cleaned thing density density below the fluid density of above-mentioned the 1st fluid with the above-mentioned thing that is cleaned.
26. as the cleaning method that utilizes pressure fluid of claim 23 or 24 records, above-mentioned the 1st fluid is identical with above-mentioned the 2nd fluid, above-mentioned the 1st fluid is a liquid, and above-mentioned the 2nd fluid is a supercritical fluid.
27. as the cleaning method that utilizes pressure fluid of record in the claim 20,21,23,24 any, above-mentioned fluid contains and is selected from least a in carbon dioxide, water, ammonia, suboxides carbon, the alcohol.
28., be lubricating oil attached to the above-mentioned impurity that is cleaned the thing surface as the cleaning method that utilizes pressure fluid of record in the claim 20,21,23,24 any.
29. as the cleaning method that utilizes pressure fluid of record in the claim 20,21,23,24 any, the above-mentioned thing that is cleaned is the parts with recess configuration.
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