WO2011141979A1 - マスキング治具、基板加熱装置、及び成膜方法 - Google Patents
マスキング治具、基板加熱装置、及び成膜方法 Download PDFInfo
- Publication number
- WO2011141979A1 WO2011141979A1 PCT/JP2010/057856 JP2010057856W WO2011141979A1 WO 2011141979 A1 WO2011141979 A1 WO 2011141979A1 JP 2010057856 W JP2010057856 W JP 2010057856W WO 2011141979 A1 WO2011141979 A1 WO 2011141979A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- masking jig
- opening
- heat
- heating
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 160
- 238000010438 heat treatment Methods 0.000 title claims abstract description 70
- 230000000873 masking effect Effects 0.000 title claims abstract description 46
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 26
- 239000007921 spray Substances 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims description 38
- 239000000843 powder Substances 0.000 claims description 37
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 239000011343 solid material Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 37
- 229910052751 metal Inorganic materials 0.000 abstract description 25
- 239000002184 metal Substances 0.000 abstract description 25
- 230000001681 protective effect Effects 0.000 description 12
- 239000004065 semiconductor Substances 0.000 description 10
- 230000035882 stress Effects 0.000 description 8
- 229910000679 solder Inorganic materials 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
- H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
- H01L23/3735—Laminates or multilayers, e.g. direct bond copper ceramic substrates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
- B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
- B05B12/28—Masking elements, i.e. elements defining uncoated areas on an object to be coated for defining uncoated areas that are not enclosed within coated areas or vice versa, e.g. for defining U-shaped border lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1481—Spray pistols or apparatus for discharging particulate material
- B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- the present invention relates to a masking jig for specifying a film formation region on which a film is formed and a substrate heating apparatus that heats the substrate when a film of material powder is formed on the surface of the substrate constituting the power module.
- the present invention also relates to a film forming method in which a spraying device sprays material powder onto the surface of a substrate to form a film.
- a cold spray method has been proposed as the above-described film forming method.
- the material powder is sprayed from the nozzle at a high speed together with the working gas heated to a temperature lower than the melting point or softening temperature of the material powder, and the solid material powder collides with the surface of the substrate.
- This is a technique for forming a film.
- it is not necessary to heat the material powder to a high temperature as compared with a spraying method in which the material powder is melted or softened and sprayed onto the surface of the substrate at a high speed. For this reason, it can suppress that the property of material powder changes by oxidation etc., and can form the coating film with high adhesiveness on the surface of a board
- substrate it can suppress that the property of material powder changes by oxidation etc.
- Patent Document 1 The cold spray method described above is described in, for example, Patent Document 1 below.
- a heating plate 111 is connected to the back surface 110 b of the substrate 110, and a heater 112 for heating the heating plate 111 is provided.
- Patent Document 1 listed below describes heating the surface 110a of the substrate 110 using a laser device as a modified embodiment.
- the material powder 121 sprayed from the cold spray device 120 collides with the surface 110a of the substrate 110 in a state where the substrate 110 is heated.
- the material powder 121 and the surface of the substrate 110 are collided. 110a is easily deformed.
- the rate at which the material powder 121 adheres to the surface 110a of the substrate 110 and the adhesion thereof can be improved, and the coating 130 of the material powder 121 can be densely formed.
- a semiconductor element 212 such as an IGBT is connected to the surface 210 a of the insulating substrate 210 via the solder 211.
- a cooler 220 heat radiating device that releases heat generated by switching of the semiconductor element 212 is connected to the back surface 210 b of the insulating substrate 210 via a stress relaxation material 213.
- the cooler 220 is connected to the back surface 210 b of the insulating substrate 210 in advance, and a solid material is discharged from the cold spray device while using a masking jig for specifying a range in which the material powder is injected.
- the material powder in a state is sprayed onto the surface 210 a of the substrate 210.
- the coating 230 is formed on the surface 210 a of the insulating substrate 210, and then the semiconductor element 212 is bonded onto the coating 230 using the solder 211.
- the reason why the coating 230 of the material powder is formed on the surface 210 a of the insulating substrate 210 is to improve the wettability of the solder 211 and facilitate the bonding of the semiconductor element 212 to the surface 210 a of the insulating substrate 210.
- the cooler 220 is connected to the back surface 210b of the insulating substrate 210 in advance, so that the back surface 210b side of the insulating substrate 210 is shown in FIG.
- the heating plate 111 and the heater 112 As shown, the insulating substrate 210 cannot be heated.
- the insulating substrate 210 is heated by radiation, it is difficult to sufficiently heat the insulating substrate 210, and the heat loss due to the cooler 220 is large.
- the surface 110a of the insulating substrate 110 is heated using a laser device, an expensive laser device is newly added, and thus cannot be implemented with an inexpensive configuration.
- the present invention provides a material powder on the surface of the substrate while the surface of the substrate is heated by an inexpensive configuration with respect to the substrate on which the heat dissipation device is connected to the back surface.
- An object of the present invention is to provide a masking jig, a substrate heating apparatus, and a film forming method so as to be sprayed.
- the spray device sprays a solid material powder onto the surface of the substrate on the surface of the power module that is connected to the heat dissipation device on the back surface.
- the spray device is used for specifying a film formation region where the film is to be formed, and an opening for specifying the film formation region is formed to have a contact member that contacts the surface of the substrate.
- the contact member is characterized in that a heating means capable of heating the vicinity of the opening is provided in the contact member.
- the vicinity of the opening means a portion of the contact member that overlaps the substrate in plan view.
- the contact member includes a planar portion in which the opening is formed, and a side portion that extends from the planar portion in the thickness direction of the substrate and surrounds the substrate. It is preferable that the heat generating means is provided on the flat surface portion and the side surface portion.
- the contact member is formed with a plurality of openings corresponding to a plurality of substrates connected to one heat radiating device, and the heat generating means. Are preferably arranged so as to heat the vicinity of each opening.
- a coating is formed by injecting solid material powder onto the surface of the substrate with respect to the substrate constituting the power module having a heat dissipation device connected to the back surface.
- the contact member that heats the substrate when formed has a contact member that is in contact with the surface of the substrate and has an opening that identifies a film formation region on which the film is formed;
- a heating jig provided with a heating wire capable of heating the vicinity of the opening inside, a power supply for supplying a current to the heating wire, and a control means for controlling the power supply.
- the contact member is formed with a plurality of openings corresponding to a plurality of substrates connected to one of the heat dissipation devices, and the heat generating means. Are preferably arranged so as to heat the vicinity of each opening.
- the spray device sprays a solid material powder onto the surface of the substrate on the surface of the power module that is connected to the heat dissipation device on the back surface.
- a substrate forming method for forming a mask wherein an opening for specifying a film formation region on which the film is to be formed is formed, and a heating tool capable of heating the vicinity of the opening is provided inside the substrate. The heating means heats the vicinity of the opening, and the spraying device sprays the material powder onto the heated surface of the substrate.
- the masking jig has a plurality of openings corresponding to a plurality of substrates connected to one heat dissipation device, and the heat generation.
- the means heats the vicinity of each opening.
- the heating means provided inside the masking jig heats the vicinity of the opening and is in contact with the masking jig.
- the surface of the insulating substrate is heated.
- the injection apparatus can inject
- the ratio of the material powder adhering to the surface of the substrate and the adhesion thereof can be improved, and the coating film of the material powder can be densely formed.
- FIG. 2 is a configuration diagram of a power module in the related art.
- FIG. 1 schematically shows a state in which a film of material powder is formed on the surface of a substrate by a cold spray method.
- FIG. 1 schematically shows an insulating substrate 10, a stress relaxation material 20, a cooler 30 as a heat dissipation device, a cold spray device 40 as an injection device, and a substrate heating device 50.
- the insulating substrate 10 is for cutting off the electrical connection between the semiconductor element such as IGBT and the cooler 30 in the power module.
- the insulating substrate 10 is composed of three layers, and an intermediate plate 11 made of aluminum nitride is interposed between an upper plate 12 and a lower plate 13 made of pure aluminum. For this reason, the front surface 10a and the back surface 10b of the insulating substrate 10 are made of pure aluminum.
- the configuration of the insulating substrate 10 is not limited to the configuration described above, and can be changed as appropriate.
- FIG. 2 a plurality of (16 in FIG. 2) the insulating substrates 10 described above are connected on one cooler 30, and the plurality of insulating substrates 10 is one masking jig 60.
- FIG. 1 schematically shows one insulating substrate 10 connected on the cooler 30.
- the stress relaxation material 20 prevents the insulating substrate 10 or the semiconductor element from being damaged by thermal stress when the power module is manufactured by brazing or soldering.
- the upper surface of the stress relaxation material 20 and the back surface of the insulating substrate 10 are soldered.
- the cooler 30 releases heat generated by switching of the semiconductor element.
- An insulating substrate 10 is connected to the cooler 30 via a stress relieving material 20, and a case 31 of the cooler 30 and a lower surface of the stress relieving material 20 are brazed. Fins 32 are provided in the case 31, and a flow path through which a refrigerant flows is formed.
- the cooler 30 is connected in advance to the back surface 10b of the insulating substrate 10 via the stress relaxation material 20, and the copper powder 41 as the material powder is supplied from the cold spray device 40 using the masking jig 60 to the insulating substrate 10. It sprays on the surface 10a.
- the film 41a of the copper powder 41 is formed on the surface 10a of the insulating substrate 10, and then the semiconductor element is bonded onto the film 41a using solder.
- the reason why the coating 41a of the copper powder 41 is formed on the surface 10a of the insulating substrate 10 is to improve the wettability of the solder and facilitate the bonding of the semiconductor element to the surface 10a of the insulating substrate 10.
- the cold spray device 40 is configured to inject the solid state copper powder 41 at a high speed (for example, 500 to 1000 m / s) from the nozzle 42 together with the working gas heated to a temperature lower than the melting point or softening temperature of the copper powder 41.
- the cold spray device 40 is configured to be movable in the plane direction of the insulating substrate 10 by a moving means (not shown).
- the material powder to be sprayed is not limited to the copper powder 41, and may be, for example, a copper alloy powder, aluminum, chromium, nickel, iron, or a powder of these alloys.
- the copper powder 41 to be sprayed is not heated to a high temperature (for example, 1000 ° C.) unlike the plasma spraying method, the flame spraying method, or the like. For this reason, it can suppress that the property of the copper powder 41 changes due to oxidation or the like, and the coating film 41 a having a high degree of adhesion can be formed on the surface 10 a of the insulating substrate 10.
- the working gas described above prevents the copper powder 41 from being oxidized, and is, for example, helium, nitrogen, air or the like.
- the insulating substrate 10 is preferably heated between 100 ° C. and 200 ° C. This is because the colliding copper powder 41 and the surface 10a of the insulating substrate 10 are easily deformed, the anchor effect and shear deformation are promoted, and the ratio of the copper powder 41 adhering to the surface 10a of the insulating substrate 10 and its adhesion force are increased. This is because the coating 41a of the copper powder 41 is densely formed while improving.
- the cooler 30 when the cooler 30 is connected in advance to the back surface 10b of the insulating substrate 10, the insulating substrate 10 cannot be heated from the back surface 10b. Further, when the insulating substrate 10 is heated by radiation, it is difficult to sufficiently heat the surface 10 a of the insulating substrate 10, and heat loss is large due to the cooler 30. On the other hand, when the surface 10a of the insulating substrate 10 is heated using a laser device, an expensive device is newly added, so that it cannot be implemented with an inexpensive configuration.
- the substrate heating device 50 is provided so that the insulating substrate 10 can be heated from the front surface 10a side.
- the substrate heating apparatus 50 includes the above-described masking jig 60, a heating wire 70 as a heating means provided in the masking jig 60, a power supply 80 for supplying a current to the heating wire 70, and this power supply. And an electronic control unit 90 as a control means for controlling 80.
- the masking jig 60 specifies a film forming range that is a range in which the coating film 41a is formed, and is formed so as to cover the plurality of insulating substrates 10 as shown in FIG.
- the masking jig 60 has a metal member 61 as a contact member in surface contact with the surfaces 10 a of the plurality of insulating substrates 10 on the inside, and a heat insulating member 62 that suppresses heat conduction on the outside of the metal member 61. is doing.
- the masking jig 60 has a plurality of openings 63 corresponding to the respective insulating substrates 10, and has a protective film 64 on the surface facing the cold spray device 40. Yes.
- Each opening 63 allows the copper powder 41 to pass through in the thickness direction of the insulating substrate 10. 1 and 3 schematically show one opening 63 for easy understanding of the present embodiment.
- the metal member 61 is for heating the surface 10a of the insulating substrate 10, and a heating wire 70 capable of generating heat is provided inside.
- the metal member 61 is comprised with the metal with high heat conductivity, for example, is comprised with copper or aluminum.
- the metal member 61 has a flat portion 61 a in which an opening 63 is formed and extends in the plane direction of the insulating substrate 10, and is insulated from the peripheral portion of the flat portion 61 a toward the cooler 30.
- a side surface portion 61b extending in the thickness direction of the substrate 10 is provided.
- the flat portion 61a of the metal member 61 is in surface contact with the entire surface 10a of the insulating substrate 10 except for the film formation region so that the surface 10a of the insulating substrate 10 can be quickly heated.
- a part of the flat portion 61 a of the metal member 61 faces a part of the surface 10 a of the insulating substrate 10 in the vicinity of the opening 63. It may be in contact or point contact.
- the heat insulating member 62 suppresses heat conduction from the heated metal member 61 to the protective film 64 (the surface of the masking jig 60). For this reason, the heat insulating member 62 is made of a material having a low heat transfer coefficient, and is made of, for example, glass, foamed plastic, stainless steel, or the like.
- the heat insulating member 62 covers the entire metal member 61.
- the heat insulating member 62 has a flat portion 62a in which an opening 63 is formed and extends in the planar direction of the insulating substrate 10, and in the thickness direction of the insulating substrate 10 from the peripheral portion of the flat portion 62a toward the cooler 30.
- the side part 62b extends.
- the flat part 62 a of the heat insulating member 62 is overlapped with the flat part 61 a of the metal member 61 in the thickness direction of the insulating member 10 in order to suppress heat conduction to the entire protective film 64. This is because if the protective film 64 is heated in response to the heat generated by the heating wire 70, the sprayed copper powder 41 easily adheres to the protective film 64, and removal of the adhered copper powder 41 becomes difficult. is there. That is, by providing the heat insulating member 62 inside the masking jig 60 as described above, the injected copper powder 41 is less likely to adhere to the protective film 64.
- the side part 61 b of the metal member 61 and the side part 62 b of the heat insulating member 62 are not in contact with the cooler 30. This is to prevent heat from directly conducting from the masking jig 60 to the cooler 30 when the metal member 61 is heated. Further, the side surface portion 61b of the metal member 61 surrounds the insulating substrate 10, and makes it easy to trap the heat generated by the heating wire 70 inside the side surface portion 61b.
- the protective film 64 is a film formed of a material that is difficult for the copper powder 41 to adhere to the surface of the flat portion 62a of the heat insulating member 62, and is a film that has been surface-treated with, for example, ceramic or resin.
- the heating wire 70 generates heat due to the current supplied from the power supply 80.
- the heating wire 70 is provided on the flat surface portion 61a and the side surface portion 61b of the metal member 61 in FIG. 3 schematically shown. Thereby, the metal member 61 can be heated quickly.
- a part of the heating wire 70 is disposed in the vicinity of the opening 63. For this reason, the part corresponding to a film-forming area
- the vicinity of the opening 63 refers to a portion of the metal member 61 that overlaps the insulating substrate 10 in plan view.
- the heating wire 70 passes through the vicinity of each opening 63 on the flat portion 61 a of the metal member 61. It is formed in a bellows shape. In other words, the heating wire 70 is disposed so as to heat the vicinity of each opening 63. For this reason, in this case, all of the portions corresponding to the film formation region of the surface 10a of each insulating substrate 10 can be quickly heated by the heat generated by the heating wire 70.
- the power supply 80 is controlled by the electronic control unit 90 for a current value supplied to the heating wire 70.
- the electronic control device 90 is connected to a power source 80 and a cold spray device 40, and the temperature of the metal member 61 detected by the temperature sensor 91 and the copper powder 41 from the cold spray device 40. Based on the injection timing, the above-described current value is changed. Thereby, when the copper powder 41 is sprayed onto the surface 10a of the insulating substrate 10, the heating wire 70 is generating heat, and the temperature of the metal member 61, that is, the temperature of the surface 10a of the insulating substrate 10 is from 100 ° C. to 200 ° C. It is a predetermined temperature T ° C.
- the surface 10a of the insulating substrate 10 only needs to be heated to the predetermined temperature T ° C. only when the copper powder 41 is sprayed. Therefore, the electronic control unit 90 takes into account the time during which the temperature of the surface 10a of the insulating substrate 10 is heated to the predetermined temperature T, so that the heating wire 70 generates heat immediately before the copper powder 41 is injected. While controlling the value, the current value is controlled so that the heating wire 70 does not generate heat after the copper powder 41 is injected.
- the metal member 61 of the masking jig 60 is brought into contact with the surface 10a of all the insulating substrates 10 as shown in FIG.
- the electronic control unit 90 is activated, and the heating wire 70 heats the vicinity of all the openings 63.
- the cold spray device 40 sprays the copper powder 41 on the heated surface 10 a of all the insulating substrates 10 while moving in the plane direction of the insulating substrate 10. As a result, the coating 41a of the copper powder 41 is formed on the surface 10a of all the insulating substrates 10.
- the heating wire 70 provided inside the masking jig 60 heats the vicinity of the opening 63 and comes into contact with the masking jig 60.
- the surface 10a of the insulating substrate 10 is heated. Therefore, the cold spray device 40 transfers the copper powder 41 to the insulating substrate 10 in a state where the surface 10a of the insulating substrate 10 is heated with an inexpensive configuration with respect to the insulating substrate 10 to which the cooler 30 is connected to the back surface 10b. Can be sprayed onto the surface 10a.
- the heating unit is configured to be the heating wire 70, but the configuration of the heating unit is not limited to the above-described configuration. Therefore, for example, the heat generating means includes a pipe penetrating the metal member 61 in the masking jig 60, and is configured to heat the surface 10a of the insulating substrate 10 by circulating hot water or hot air through the pipe. May be.
- the shape of the masking jig 60 is a shape including the flat surface portions 61a and 62a and the side surface portions 61b and 62b.
- the shape of the masking jig 60 is limited to the above-described shape. Instead, for example, the shape may include only the flat portions 61a and 62a.
- the heating wire 70 was formed in the shape of a bellows (refer FIG. 2), the shape of a heating wire can be changed suitably, for example, you may form a heating wire in a spiral shape.
- the protective film 64 is a film formed on the entire surface facing the cold spray device 40, but the protective film is formed on the peripheral portion of the opening 63 on the surface facing the cold spray device 40. It may be formed only.
- the masking jig 60 includes the heat insulating member 62 and the protective film 64, but may not include the heat insulating member 62 and the protective film 64.
- the heating wire 70 heated the surface 10a of the insulating substrate 10 to a predetermined temperature T ° C between 100 ° C and 200 ° C.
- the predetermined temperature T ° C is the material powder and the substrate material. Can be changed as appropriate.
- the cold spray method is used as the film forming method.
- the present invention is not limited to the cold spray method, and for example, an aerosol deposition method may be used.
- a material powder particularly ceramic powder
- a gas to form an aerosol
- the method is not limited to the cold spray method, and for example, a material powder (particularly ceramic powder), which is solid particles, is mixed with a gas to form an aerosol, which is sprayed onto the surface of the substrate at room temperature to form a film.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Resistance Heating (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
Description
また、本発明の上記態様におけるマスキング治具において、前記接触部材は、前記開口が形成されている平面部と、この平面部から前記基板の厚さ方向に延びていて前記基板を囲む側面部とを有し、前記発熱手段が、前記平面部及び前記側面部に設けられていることが好ましい。
絶縁基板10の表面10aに銅粉末41の被膜41aを形成する際に、マスキング治具60の内部に設けられた電熱線70が開口63の近傍を加熱して、マスキング治具60に接触している絶縁基板10の表面10aが加熱される。このため、冷却器30が裏面10bに接続されている絶縁基板10に対して、安価な構成により絶縁基板10の表面10aが加熱された状態で、コールドスプレー装置40が銅粉末41を絶縁基板10の表面10aに噴射することができる。この結果、銅粉末41が絶縁基板10の表面10aに付着する割合およびその密着力を向上させることができるとともに、銅粉末41の被膜41aを緻密に形成することができる。
例えば、上記した実施形態においては、発熱手段が電熱線70であるように構成したが、発熱手段の構成は上記した構成に限定されるものではない。従って、例えば、発熱手段は、マスキング治具60における金属部材61を貫通する配管を備えていて、この配管に熱水又は熱風が循環することにより絶縁基板10の表面10aを加熱するように構成しても良い。
20 応力緩和材
30 冷却器
40 コールドスプレー装置
41 銅粉末
41a 被膜
50 基板加熱装置
60 マスキング治具
61 金属部材
62 断熱部材
63 開口
64 保護膜
70 電熱線
80 電源
90 電子制御装置
Claims (8)
- 裏面に放熱装置が接続されていてパワーモジュールを構成する基板に対して、噴射装置が固体状態の材料粉末を前記基板の表面に噴射して被膜を形成する場合に、前記被膜が形成される成膜領域を特定するために用いられるマスキング治具において、
前記成膜領域を特定する開口が形成されていて前記基板の表面に接触する接触部材を有し、
前記接触部材には、その内部に前記開口の近傍を加熱可能な発熱手段が設けられていることを特徴とするマスキング治具。 - 請求項1に記載するマスキング治具において、
前記接触部材に対して、熱の伝導を抑制する断熱部材が前記基板の厚さ方向に重ねられていることを特徴とするマスキング治具。 - 請求項1又は請求項2に記載するマスキング治具において、
前記接触部材は、前記開口が形成されている平面部と、この平面部から前記基板の厚さ方向に延びていて前記基板を囲む側面部とを有し、
前記発熱手段が、前記平面部及び前記側面部に設けられていることを特徴とするマスキング治具。 - 請求項1乃至請求項3の何れかに記載するマスキング治具において、
前記接触部材には、一つの前記放熱装置に接続されている複数の基板に対応して、複数の前記開口が形成されていて、
前記発熱手段は、前記各開口の近傍を加熱するように配置されていることを特徴とするマスキング治具。 - 裏面に放熱装置が接続されていてパワーモジュールを構成する基板に対して、噴射装置が固体状態の材料粉末を前記基板の表面に噴射して被膜が形成される場合に、前記基板を加熱する基板加熱装置において、
前記被膜が形成される成膜領域を特定する開口が形成されていて前記基板の表面に接触する接触部材を有し、前記接触部材の内部に前記開口の近傍を加熱可能な電熱線が設けられているマスキング治具と、
前記電熱線に電流を供給する電源と、
前記電源を制御する制御手段と、を有することを特徴とする基板加熱装置。 - 請求項5に記載する基板加熱装置において、
前記接触部材には、一つの前記放熱装置に接続されている複数の基板に対応して、複数の前記開口が形成されていて、
前記発熱手段は、前記各開口の近傍を加熱するように配置されていることを特徴とする基板加熱装置。 - 裏面に放熱装置が接続されていてパワーモジュールを構成する基板に対して、噴射装置が固体状態の材料粉末を前記基板の表面に噴射して被膜を形成する成膜方法において、
前記被膜が形成される成膜領域を特定する開口が形成されていて内部に前記開口の近傍を加熱可能な発熱手段が設けられているマスキング治具を前記基板の表面に接触させ、
前記発熱手段が前記開口の近傍を加熱し、
加熱された前記基板の表面に対して前記噴射装置が前記材料粉末を噴射することを特徴とする成膜方法。 - 請求項7に記載する成膜方法において、
前記マスキング治具には、一つの前記放熱装置に接続されている複数の基板に対応して、複数の前記開口が形成されていて、
前記発熱手段が前記各開口の近傍を加熱することを特徴とする成膜方法。
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US13/133,271 US8414977B2 (en) | 2010-05-10 | 2010-05-10 | Masking jig, substrate heating device, and coating method |
PCT/JP2010/057856 WO2011141979A1 (ja) | 2010-05-10 | 2010-05-10 | マスキング治具、基板加熱装置、及び成膜方法 |
CN201080009896XA CN102388163B (zh) | 2010-05-10 | 2010-05-10 | 掩模、基板加热装置及成膜方法 |
KR1020117020138A KR101131355B1 (ko) | 2010-05-10 | 2010-05-10 | 마스킹 지그, 기판 가열 장치 및 성막 방법 |
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JP4844702B1 (ja) | 2011-12-28 |
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