WO2022254819A1 - 電子部品実装基板の製造方法 - Google Patents
電子部品実装基板の製造方法 Download PDFInfo
- Publication number
- WO2022254819A1 WO2022254819A1 PCT/JP2022/006966 JP2022006966W WO2022254819A1 WO 2022254819 A1 WO2022254819 A1 WO 2022254819A1 JP 2022006966 W JP2022006966 W JP 2022006966W WO 2022254819 A1 WO2022254819 A1 WO 2022254819A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solder
- film
- electronic component
- thermoplastic resin
- substrate
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 229910000679 solder Inorganic materials 0.000 claims abstract description 140
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 43
- 239000012190 activator Substances 0.000 claims abstract description 10
- 239000003963 antioxidant agent Substances 0.000 claims description 43
- 230000003078 antioxidant effect Effects 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 39
- 230000003064 anti-oxidating effect Effects 0.000 claims description 21
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 9
- 238000007254 oxidation reaction Methods 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 abstract 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 24
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 20
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 20
- 230000008569 process Effects 0.000 description 19
- 230000004907 flux Effects 0.000 description 18
- 230000007547 defect Effects 0.000 description 15
- 239000007788 liquid Substances 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 7
- 239000000155 melt Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 5
- WCOXQTXVACYMLM-UHFFFAOYSA-N 2,3-bis(12-hydroxyoctadecanoyloxy)propyl 12-hydroxyoctadecanoate Chemical compound CCCCCCC(O)CCCCCCCCCCC(=O)OCC(OC(=O)CCCCCCCCCCC(O)CCCCCC)COC(=O)CCCCCCCCCCC(O)CCCCCC WCOXQTXVACYMLM-UHFFFAOYSA-N 0.000 description 4
- BTXXTMOWISPQSJ-UHFFFAOYSA-N 4,4,4-trifluorobutan-2-one Chemical compound CC(=O)CC(F)(F)F BTXXTMOWISPQSJ-UHFFFAOYSA-N 0.000 description 4
- BQACOLQNOUYJCE-FYZZASKESA-N Abietic acid Natural products CC(C)C1=CC2=CC[C@]3(C)[C@](C)(CCC[C@@]3(C)C(=O)O)[C@H]2CC1 BQACOLQNOUYJCE-FYZZASKESA-N 0.000 description 4
- 239000007767 bonding agent Substances 0.000 description 4
- 239000013008 thixotropic agent Substances 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- ULQISTXYYBZJSJ-UHFFFAOYSA-N 12-hydroxyoctadecanoic acid Chemical compound CCCCCCC(O)CCCCCCCCCCC(O)=O ULQISTXYYBZJSJ-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- 229940114072 12-hydroxystearic acid Drugs 0.000 description 1
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 description 1
- DLLMHEDYJQACRM-UHFFFAOYSA-N 2-(carboxymethyldisulfanyl)acetic acid Chemical compound OC(=O)CSSCC(O)=O DLLMHEDYJQACRM-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- QEVGZEDELICMKH-UHFFFAOYSA-N Diglycolic acid Chemical compound OC(=O)COCC(O)=O QEVGZEDELICMKH-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 235000021314 Palmitic acid Nutrition 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 239000002529 flux (metallurgy) Substances 0.000 description 1
- -1 glycol ethers Chemical class 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/50—Assembly of semiconductor devices using processes or apparatus not provided for in a single one of the subgroups H01L21/06 - H01L21/326, e.g. sealing of a cap to a base of a container
- H01L21/60—Attaching or detaching leads or other conductive members, to be used for carrying current to or from the device in operation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
Definitions
- the present invention relates to a method for manufacturing an electronic component mounting board.
- a reflow method is known as a method of soldering multiple electronic components to a board.
- electronic components are soldered using a pre-formed solder precoat on the substrate.
- Patent Document 1 Japanese Patent Application Laid-Open No. 6-90079 describes "a fine pitch pad portion (5) having a pad arrangement pitch of less than 0.5 mm and a rough pitch pad section (4) having a pad arrangement pitch of 0.5 mm or more.
- Solder paste (8) is printed on the pad (3) of the rough pitch pad (4), and then organic acid lead salt and tin are printed on the fine pitch pad (5) After that, the printed circuit board (1) is heated to melt the solder paste (8) to form the rough pitch pad (4).
- a solder layer (13) is formed on the pad (3), and solder is deposited on the pad (3) of the fine pitch pad portion (5) from the solder deposition composition (12) to form the solder layer (13).
- one of the objects of the present invention is to provide a method of manufacturing an electronic component mounting board that can reduce soldering defects even if the interval between lands is short.
- the manufacturing method includes a step of forming a temporary fixing film to cover a plurality of solder precoats formed on a plurality of lands of a substrate and an antioxidant film formed to cover each of the plurality of solder precoats ( a step (ii) of disposing a plurality of electronic components on the plurality of solder precoats via the anti-oxidation film and the temporary fixing film; and (iii) soldering a component to the plurality of lands, wherein the antioxidant film comprises a first thermoplastic resin, the temporary fixing film comprises an activator and a second thermoplastic resin, The softening point of the first thermoplastic resin is lower than or equal to the softening point of the second thermoplastic resin.
- FIG. 1 is a cross-sectional view schematically showing one step of an example manufacturing method according to the present invention
- FIG. FIG. 1B is a cross-sectional view schematically showing a step following the step of FIG. 1A
- FIG. 1B is a cross-sectional view schematically showing a step following the step of FIG. 1B
- FIG. 1C is a cross-sectional view schematically showing a step following the step of FIG. 1C
- FIG. 1D is a cross-sectional view schematically showing a step following the step of FIG. 1D
- FIG. 1E is a cross-sectional view schematically showing a step following the step of FIG. 1E
- FIG. 1F is a cross-sectional view schematically showing a step following the step of FIG.
- FIG. 4 is a cross-sectional view schematically showing part of an example of a process of forming a solder precoat
- 3B is a cross-sectional view schematically showing a step following the step of FIG. 3A
- FIG. 3B is a cross-sectional view schematically showing a step following the step of FIG. 3B
- FIG. 3C is a cross-sectional view schematically showing a step following the step of FIG. 3C
- 3E is a cross-sectional view schematically showing a step following the step of FIG. 3D
- FIG. FIG. 4 is a cross-sectional view schematically showing part of an example of a process of forming a solder precoat
- 3B is a cross-sectional view schematically showing a step following the step of FIG. 3A
- FIG. 3B is a cross-sectional view schematically showing a step following the step of FIG. 3B
- FIG. 3C is a cross-sectional view schematically showing a step following the step of FIG.
- FIG. 4 is a cross-sectional view schematically showing one step of another example of the manufacturing method according to the present invention.
- FIG. 4B is a cross-sectional view schematically showing a step following the step of FIG. 4A;
- FIG. 4B is a cross-sectional view schematically showing a step following the step of FIG. 4B;
- FIG. 4C is a cross-sectional view schematically showing a step following the step of FIG. 4C;
- 4C is a cross-sectional view schematically showing a step following the step of FIG. 4D;
- FIG. 4F is a cross-sectional view schematically showing a step following the step of FIG. 4E;
- FIG. 4F is a cross-sectional view schematically showing a step following the step of FIG. 4F;
- FIG. 4G is a cross-sectional view schematically showing a step following the step of FIG. 4G;
- FIG. 4 is a top view schematically showing the arrangement of lands and electronic components in the example
- the manufacturing method according to this embodiment is a method for manufacturing an electronic component mounting board.
- the manufacturing method may be hereinafter referred to as “manufacturing method (M)”.
- Production method (M) includes step (i), step (ii), and step (iii) in this order.
- the step (i) is a step of forming a temporary fixing film so as to cover a plurality of solder precoats formed on a plurality of lands of a substrate and an antioxidant film formed so as to cover each of the plurality of solder precoats.
- the antioxidant film contains a first thermoplastic resin.
- the temporary fixing film contains an activator and a second thermoplastic resin. The softening point of the first thermoplastic resin is less than or equal to the softening point of the second thermoplastic resin. Since both the antioxidant film and the temporary fixing film contain a thermoplastic resin, they are softened by heating.
- the antioxidation film is formed so as to cover the surface of the solder precoat. Therefore, the antioxidant film suppresses oxidation of the surface of the solder precoat. That is, the anti-oxidation film suppresses solder defects due to oxidation of the surface of the solder precoat.
- a commercially available substrate having a solder precoat may be used as the substrate having the solder precoat formed thereon. Alternatively, a solder precoat may be formed on the lands of the substrate by a method to be described later.
- the first thermoplastic resin contained in the antioxidant film is, for example, rosin or modified rosin.
- rosin and modified rosin may be collectively referred to as "rosins".
- modified rosins include the modified rosins shown in the examples, but other modified rosins may be used.
- natural rosins such as gum rosin and wood rosin, derivatives thereof (polymerized rosin, hydrogenated rosin, disproportionated rosin, acid-modified rosin, rosin ester, etc.) may also be used.
- By modifying the rosin its softening point can be changed.
- the antioxidant film may be residue (flux residue) formed on the surface of the solder precoat when the solder precoat is formed.
- part of the flux of the solder paste used to form the solder precoat forms an antioxidant film.
- the thermoplastic resin contained in the flux becomes the first thermoplastic resin contained in the antioxidant film. That is, when the solder paste residue is used as the antioxidant film, the solder paste containing the first thermoplastic resin is used.
- the temporary fixing film stably and temporarily fixes the electronic components placed on the solder precoat until reflow is performed. By using the temporary fixing film, it is possible to prevent the electronic component from being properly mounted due to misalignment of the electronic component.
- the temporary fixing film can be formed by applying a temporary fixing agent (temporary fixing film material) so as to cover the solder precoat and the antioxidant film. After applying the temporary bonding agent, a step of drying and/or heat-treating the temporary bonding agent may be performed as necessary.
- the method of applying the temporary bonding agent is not limited, and it may be applied by screen printing using a mask, or may be applied using a dispenser.
- the temporary fixing film contains an active agent and a second thermoplastic resin, and further contains other components as necessary.
- the second thermoplastic resin may be rosins.
- examples of other ingredients include viscosity enhancing ingredients, liquid ingredients (solvents or dispersion media), and the like.
- An activator is a substance that facilitates soldering. As the activator, an activator used in known solder fluxes may be used.
- active agents examples include abietic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dimer acid, propionic acid, 2,2-bishydroxymethylpropionic acid, tartaric acid, apple acid, glycolic acid, diglycolic acid, thioglycolic acid, dithioglycolic acid, stearic acid, 12-hydroxystearic acid, palmitic acid, oleic acid, and modifications thereof.
- activators having a reducing action include, for example, amines and halides.
- viscosity-increasing ingredients examples include known ingredients used as thickeners (or thixotropic agents), such as castor wax, amide-based thixotropic agents, sorbitol-based thixotropic agents, and the like.
- thickeners or thixotropic agents
- amide-based thixotropic agents such as castor wax, amide-based thixotropic agents, sorbitol-based thixotropic agents, and the like.
- liquid components contained in the temporary fixing film include hexyldiglycol (boiling point: about 260°C).
- a liquid component having a boiling point higher than the melting point of the solder of the solder precoat may be used as the liquid component.
- alcohols, polyols, glycol ethers, and other organic compounds e.g., glycols, ketones, hydrocarbons, esters, lupineols, etc.
- these with relatively high viscosity are preferred.
- the temporary fixing film may be formed using a solder flux having a relatively high viscosity.
- the viscosity of the temporary fixing film may be in the range of 20-200 Pa ⁇ s (for example, the range of 50-180 Pa ⁇ s).
- the electronic component can be stably temporarily fixed.
- the viscosity of the temporary fixing film is particularly preferably 50 Pa or more. Viscosity can be measured using an Anton Paar rheometer and using a 1.993° cone. In addition, said viscosity is a value measured at 25 degreeC.
- the softening point T1 (°C) of the first thermoplastic resin is equal to or lower than the softening point T2 (°C) of the second thermoplastic resin, and may be lower than T2.
- the antioxidant film can be considered to start softening at the softening point T1 of the first thermoplastic resin.
- the temporary fixing film can be considered to start softening at the softening point T2 of the second thermoplastic resin. Therefore, hereinafter, the softening point T1 and the softening point T2 may be described as softening temperatures of the antioxidant film and the temporary fixing film.
- the softening point of rosins means the value measured by the method described in JIS K 5902. Since various rosins with different softening points are commercially available, the softening point T1 and the softening point T2 can be easily adjusted by using them.
- the first thermoplastic resin is usually the main component of the antioxidant film.
- the second thermoplastic resin is usually the main component of the temporary fixing film.
- the main component means the component with the highest content rate among the components other than the liquid component (solvent or dispersion medium).
- the main component usually accounts for 50% by mass or more of the components excluding liquid components.
- each of the first and second thermoplastic resins may be composed of a plurality of thermoplastic resins. When they are composed of a plurality of resins, the softening points of all resins satisfy softening point T1 ⁇ softening point T2.
- the antioxidant film and the temporary fixing film may contain a thermoplastic resin other than the first and second thermoplastic resins as a minor component (for example, the content in the film is 5% by mass or less).
- the softening point T1 of the first thermoplastic resin may be in the range of 50-220°C (for example, in the range of 70-180°C).
- the softening point T2 of the second thermoplastic resin may be in the range of 50-220° C. (eg, in the range of 70-180° C.).
- the softening point T1 and the softening point T2 may satisfy 0 ⁇ (T2 ⁇ T1) ⁇ 65.
- the value of (T2-T1) may be in the range of 0 to 110 (°C). Within these ranges, (T2-T1) may be greater than zero.
- the softening point T2 of the temporary fixing film is lower than the melting point of the solder precoat.
- both the first thermoplastic resin and the second thermoplastic resin preferably dissolve in the liquid component of the temporary fixing film.
- both the anti-oxidation film and the temporary fixing film are softened, both films are compatible with each other.
- rosins for the first and second thermoplastic resins, and use a liquid component (hexyldiglycol, etc.) in which they dissolve in the liquid component of the temporary fixing film.
- Step (ii) is a step of arranging a plurality of electronic components on a plurality of solder precoats via an antioxidant film and a temporary fixing film.
- the method of arranging the electronic components is not particularly limited, and known methods and known devices may be used.
- the plurality of electronic components may include electronic components having a size equal to or smaller than the JIS standard 0402 size.
- the present invention is particularly effective when mounting such micro-sized electronic components. Since the electronic component is fixed by the temporary fixing film, it is stably fixed to the substrate until step (iii) is performed.
- Step (iii) is a step of soldering a plurality of electronic components to a plurality of lands by melting a plurality of solder precoats.
- Step (iii) can be carried out by a process commonly called a reflow process.
- the substrate or the like the substrate on which electronic components are arranged
- the substrate or the like is heated until the solder precoat melts, and then the substrate or the like is cooled to solidify the melted solder.
- a substrate on which electronic components are mounted is obtained by step (iii). If necessary, a soldering inspection or the like may be performed after step (iii).
- step (iii) when the substrate on which the electronic components are arranged is heated, the antioxidant film softens first, and then the temporary fixing film softens. According to this configuration, it is possible to suppress the occurrence of defects such as the electronic component moving during heating and being connected to a land other than the land to which it should be soldered. The effect of suppressing defects by this configuration increases as the distance between lands on which adjacent electronic components are arranged becomes shorter.
- Step (iii) is not particularly limited as long as a plurality of electronic components can be soldered to the board, and a known reflow process may be used.
- the step of raising the temperature of the substrate or the like may include a preheating step.
- the step of raising the temperature of the substrate or the like may not include the preheating step.
- the substrate and the like may be heated so that the temperature of the upper surface of the substrate increases from 50° C. to the melting point of the solder precoat at a temperature increase rate of more than 2° C./second. That is, in this case, the temperature rise rate of the upper surface of the substrate while the temperature of the upper surface of the substrate rises from 50° C.
- the temperature increase rate may be 3° C./second or more, or 4° C./second or more.
- the temperature increase rate may be 10° C./second or less (for example, 8° C./second or less).
- a minute electronic component is, for example, an electronic component having a planar shape with one side of 0.4 mm or less.
- the electronic components include electronic components having a size equal to or smaller than the JIS standard 0402 size electronic components.
- the term "planar shape" refers to the shape of an electronic component when viewed from above the board in a state where the electronic component is mounted on the board.
- Step (iii) can be performed using a reflow device having the same or similar configuration as a known reflow device.
- step (iii) may be performed in a nitrogen gas atmosphere in the reflow apparatus.
- the temperature increase rate is 4° C./second or more
- the oxidation of the surface of the solder precoat can be suppressed even if step (iii) is performed in the air atmosphere inside the reflow device. Therefore, when the temperature increase rate is 4° C./second or more, step (iii) may be performed in an air atmosphere.
- the melting point of the solder precoat varies depending on the solder used. Generally used lead-free solder (solder containing no lead) has a melting point of, for example, 200° C. or higher. Therefore, when lead-free solder is used, the temperature of the upper surface of the substrate is raised to 200° C. or higher (for example, 220° C. or higher or 230° C. or higher) in step (iii).
- the upper limit of the temperature of the upper surface of the substrate may be 250° C. or lower (for example, 240° C. or lower or 230° C. or lower) in consideration of the influence on electronic components.
- the shortest distance L between the first land on which an arbitrary electronic component among the plurality of electronic components is arranged and the second land on which an electronic component adjacent to the arbitrary electronic component is arranged is 0.4 mm or less.
- Manufacturing method (M) is particularly effective when the shortest distance L is short.
- the shortest distance L may be, for example, 0.03 mm or more, 0.05 mm or more, 0.1 mm or more, or 0.2 mm or more.
- the shortest distance L may be 0.4 mm or less, 0.3 mm or less, or 0.2 mm or less. However, the shortest distance L may be greater than 0.4 mm.
- the shortest distance L may be in the range 0.03-0.4 mm, in the range 0.05-0.4 mm, in the range 0.1-0.4 mm, in the range 0.2-0.4 mm.
- the upper limit may be 0.2 mm or 0.3 mm as long as the lower limit is not equal to or greater than the upper limit.
- the distance between the first land and the second land can take various values, but the shortest distance among them is the shortest distance L.
- the manufacturing method (M) may include a step (x) of forming a plurality of solder precoats and an antioxidant film on the plurality of lands before step (i).
- a method for forming a plurality of solder precoats is not limited, and a known method may be used.
- the plurality of solder precoats and the antioxidant films are pressed from above the substrate to crack the antioxidant films and A step (y) of planarizing the top surfaces of the plurality of solder precoats may be further included.
- the manufacturing method (M) is characterized in that if in step (i) at least one solder precoat is improperly formed to short-circuit two adjacent lands, after step (x) and in step ( Before i), the step (z) may further comprise forming a notch in the portion of the improperly formed solder precoat that lies above between the two lands.
- the production method (M) may include either one of step (y) and step (z), or may include both. When both are included, step (z) may be performed before step (y) or after step (y).
- Embodiment 1 describes an example of the manufacturing method (M). The steps in the manufacturing method of Embodiment 1 are schematically shown in cross-sectional views of FIGS. 1A and 1B.
- a temporary fixing film 13 is formed so as to cover each of the plurality of solder precoats 11 and the antioxidant films 12 (step (i)).
- the solder precoat 11 is formed on the land 10b of the printed circuit board (substrate) 10.
- the printed circuit board 10 includes a plate-like substrate portion 10a and lands 10b formed on the surface of the substrate portion 10a.
- a plurality of electronic components 30 are arranged on the plurality of solder precoats 11 via the anti-oxidation film 12 and the temporary fixing film 13 (step (ii)).
- a substrate 10X on which a plurality of electronic components 30 are arranged is obtained.
- An electronic component 30 illustrated as an example includes two terminal portions 30a and an element portion 30b arranged therebetween.
- FIG. 1C shows a state in which the antioxidant film 12 is softened and the temporary fixing film 13 is not softened. At this time, the antioxidant film 12 softens and spreads. However, the temporary fixing film 13 is not softened and keeps the shape corresponding to the shape of the solder precoat 11 . Therefore, even if the antioxidant film 12 is softened, the movement of the electronic component 30 in the direction parallel to the surface of the printed circuit board 10 is suppressed. As a result, solder defects are reduced.
- FIG. 1D shows the state when the substrate 10X is further heated.
- the temporary bonding film 13 is also softened and the temporary bonding agent spreads along the surface of the electronic component 30 .
- the oxide film on the surface of the terminal portion 30a of the electronic component 30 is removed.
- solder defects are suppressed.
- FIG. 1E shows the state when the substrate 10X is further heated.
- a portion of the solder precoat 11 melts to form a melt nucleus 11b on the land 10b.
- the anti-oxidation film 12 and the temporary fixing film 13 dissolve to form a mixture 13a.
- the substrate 10Y is an electronic component mounting substrate.
- the substrate 10X may be heated so that the temperature of the upper surface 10sa of the printed circuit board 10 is lower than the temperature of the lower surface 10sb of the printed circuit board 10. Further, as described above, when heating the substrate 10X, the preheating process may be provided, or the preheating process may not be provided.
- FIG. 2 shows an example of the temperature profile of the upper surface 10sa and the lower surface 10sb of the printed circuit board 10 in step (ii) when the preheating step is not provided.
- Fig. 2 shows an example of raising the temperature of the substrate surface from room temperature (25°C) to the maximum temperature at a constant heating rate.
- the rate of temperature increase of the surface temperature of the upper surface 10sa is 4° C./second or more.
- the heating rate of the surface temperature of the lower surface 10sb is lower than the heating rate of the surface temperature of the upper surface 10sa.
- the softening point T1 (° C.) of the second thermoplastic resin in the antioxidant film 12 is equal to or lower than the softening point T2 (° C.) of the second thermoplastic resin in the temporary fixing film 13 . That is, the softening temperature of the temporary fixing film 13 is equal to or lower than the softening temperature of the antioxidant film 12 .
- the cooling process in the cooling zone is performed.
- the manufacturing method (M) of the present invention may include a step (x) of forming a plurality of solder precoats 11 and an antioxidant film 12 on the plurality of lands 10b.
- An example of such step (x) is schematically illustrated in FIGS. 3A-3E.
- a printed circuit board (substrate) 10 shown in FIG. 3A is prepared.
- the printed circuit board 10 includes a plate-like substrate portion 10a and lands 10b formed on the surface of the substrate portion 10a.
- the lands 10b are connected to wiring (not shown) on the substrate portion 10a as required.
- solder paste 11p is arranged on the land 10b by applying the solder paste 11p.
- Solder paste 11p includes solder particles 11a and flux 11f.
- the mask 20 is moved from the printed circuit board 10. Then, as shown in FIG. Next, the printed board 10 on which the solder paste 11p is placed is heated to melt the solder particles 11a, and then the printed board 10 is cooled. As a result, a solder precoat 11 is formed on the land 10b, as shown in FIG. 3E. At this time, the residue of the flux 11 f becomes the anti-oxidation film 12 . The thermoplastic resin contained in the flux 11 f becomes the first thermoplastic resin in the antioxidant film 12 .
- the flux residue is used as the antioxidation film 12 of the solder precoat 11 . Since the antioxidation film 12 remains until just before the solder melts in the reflow process, oxidation of the surface of the solder precoat 11 can be suppressed. Furthermore, by using the flux residue as the anti-oxidation film 12, the step of removing the flux residue can be omitted.
- the manufacturing method (M) may include the above-described step (y) and/or step (z) after step (x) and before step (i).
- 4A and 4B are process cross-sectional views showing an example of performing the process (y) and the process (z) after the process (x).
- Step (z) is performed when at least one solder precoat 11 is improperly formed to short-circuit two adjacent lands 10b, as shown in FIG. 4A.
- an inspection step is performed after the step (x) and before the step (z) to check whether the solder precoat 11 is properly formed.
- An inspection process can be performed by a well-known method. For example, defects in the solder precoat 11 can be detected by photographing the printed circuit board 10 on which the solder precoat 11 is formed with a camera and processing the obtained image.
- step (y) a flattening tool 51 having a flat pressing surface is used to press the plurality of solder precoats 11 and the antioxidant films 12 from above the printed circuit board 10 (flattening step). .
- FIG. 1 As the size of the electronic component 30 becomes smaller, the size of the solder precoat 11 also becomes smaller. When the size of the solder precoat 11 becomes small, the upper surface 11t of the solder precoat 11 becomes hemispherical due to the influence of surface tension, which may make it difficult to arrange the electronic component 30 stably.
- the electronic component 30 By flattening the upper surface of the solder precoat 11 in step (y), the electronic component 30 can be stably arranged.
- the solvent contained in the temporary fixing film 13 and the solvent contained in the antioxidant film 12 are more likely to be compatible with each other.
- the anti-oxidation film 12 is peeled off and a new surface of the solder metal appears, the electrodes of the electronic component and the solder of the solder precoat are easily connected. Since the anti-oxidation film 12 is supplied immediately after the flattening process, the new surface of the solder metal is hardly oxidized.
- step (z) is performed.
- a notch portion 11k is formed in a portion of the improperly formed solder precoat 11 that exists above between two lands 10b.
- the notch 11k can be formed, for example, by poking the solder precoat 11 with a chisel-like tool 52 as shown in FIG. 4C.
- the electronic component 30 is mounted by the same method as in FIGS. 1A to 1G. Specifically, first, as shown in FIG. 4D, a temporary fixing film 13 is formed so as to cover the solder precoat 11 and the antioxidant film 12 (step (i)).
- a plurality of electronic components 30 are arranged on the plurality of solder precoats 11 via the anti-oxidation film 12 and the temporary fixing film 13 (step (ii)).
- a substrate 10X on which a plurality of electronic components 30 are arranged is obtained.
- the board 10X is heated to melt the solder precoat 11 and solidify it, and the electronic component 30 is mounted on the printed board 10 (step (iii)).
- the steps at this time are schematically shown in cross-sectional views of FIGS. 4F to 4H.
- the antioxidant film 12 has softened and spread.
- the temporary fixing film 13 is softened and compatible with the antioxidant film 12 to form a mixture 13a.
- a part of the solder precoat 11 is melted to form a molten nucleus 11b.
- the melted solder solidifies to become solder 11d.
- the mixture 13a becomes 13 g of residues.
- the board 10Y on which the electronic component 30 is mounted is obtained.
- the solder precoat 11 melts, the unmelted solder precoat 11 melts while being attracted to the previously melted melt nucleus 11b. Therefore, as shown in FIG. 4H, the short circuit is finally eliminated.
- the solder precoat 11 present between the two lands 10b is more likely to be attracted to the molten nucleus 11b. Therefore, it becomes easier to eliminate the short circuit between the two lands.
- solder paste was used to form a solder precoat on the land of the printed circuit board. A film of flux residue formed on the surface of the solder precoat was used as an anti-oxidation film.
- the solder paste contains solder particles (90% by weight), polymerized rosin (4.5% by weight, softening point 140° C.), abietic acid (0.5% by weight), castor wax (0.5% by weight), and hexyl A mixture of diglycols (4.5% by weight) was used. Hexyldiglycol is the liquid component (solvent), abietic acid is the activator, and castor wax is the thixotropic agent (also in the following examples).
- solder particles made of SnAgCu alloy were used as the solder particles.
- the main component of the anti-oxidation film (flux residue film) formed using this solder paste is polymerized rosin, and it can be considered that the anti-oxidation film begins to soften at 140°C.
- a temporary fixing film was formed to cover the solder precoat and the anti-oxidation film.
- a mixture of hydrogenated rosin (45% by mass, softening point 75° C.), abietic acid (5% by mass), castor wax (5% by mass), and hexyldiglycol (45% by mass) was used as the material for the temporary fixing film.
- the main component of the temporary fixing film is hydrogenated rosin, and it can be considered that the temporary fixing film starts to soften at 75°C.
- FIG. 5 schematically shows a top view showing the arrangement of lands and electronic components on the printed circuit board.
- the land portion is hatched, and the positions where the electronic components are arranged are indicated by dotted lines.
- FIG. 5 also shows each size (unit: mm).
- the shortest distance L between adjacent lands was set to 0.05 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
本発明の新規な特徴を添付の請求の範囲に記述するが、本発明は、構成および内容の両方に関し、本発明の他の目的および特徴と併せ、図面を照合した以下の詳細な説明によりさらによく理解されるであろう。
本実施形態に係る製造方法は、電子部品実装基板の製造方法である。当該製造方法を、以下では、「製造方法(M)」と称する場合がある。製造方法(M)は、工程(i)、工程(ii)、および工程(iii)をこの順に含む。
工程(i)は、基板の複数のランド上に形成された複数の半田プリコートと複数の半田プリコートのそれぞれを覆うように形成された酸化防止膜とを覆うように仮止め膜を形成する工程である。酸化防止膜は、第1の熱可塑性樹脂を含む。仮止め膜は、活性剤と第2の熱可塑性樹脂とを含む。第1の熱可塑性樹脂の軟化点は、第2の熱可塑性樹脂の軟化点以下である。酸化防止膜および仮止め膜はともに熱可塑性樹脂を含むため、それらは加熱によって軟化する。
工程(ii)は、酸化防止膜および仮止め膜を介して複数の電子部品を複数の半田プリコート上に配置する工程である。電子部品を配置する方法に特に限定はなく、公知の方法および公知の装置を用いてもよい。複数の電子部品は、JIS規格の0402サイズ以下のサイズの電子部品を含んでもよい。そのような微小なサイズの電子部品を実装する場合に、本発明は特に有効である。電子部品は仮止め膜によって固定されるため、工程(iii)が行われるまで、基板に安定に固定される。
工程(iii)は、複数の半田プリコートを溶融させることによって複数の電子部品を複数のランドに半田付けする工程である。工程(iii)は、一般的にリフロー工程と呼ばれる工程によって実施できる。リフロー工程では、半田プリコートが溶融するまで基板等(電子部品が配置された基板)を加熱した後、基板等を冷却することによって溶融した半田を固化させる。工程(iii)によって、電子部品が実装された基板が得られる。必要に応じて、工程(iii)の後に、半田付けの検査などを行ってもよい。
実施形態1では、製造方法(M)の一例について説明する。実施形態1の製造方法における工程を、図1Aおよび図1Bの断面図で模式的に示す。
実験例1では、半田ペーストを用いて、プリント基板のランド上に半田プリコートを形成した。そして、半田プリコートの表面に形成されたフラックス残渣の膜を、酸化防止膜として用いた。半田ペーストには、半田粒子(90質量%)、重合ロジン(4.5質量%、軟化点140℃)、アビエチン酸(0.5質量%)、カスターワックス(0.5質量%)、およびヘキシルジグリコール(4.5質量%)の混合物を用いた。ヘキシルジグリコールは液体成分(溶剤)であり、アビエチン酸は活性剤であり、カスターワックスはチキソ剤である(以下の例においても同様である)。半田粒子には、SnAgCu合金からなる半田の粒子を用いた。この半田ペーストを用いて形成された酸化防止膜(フラックス残渣の膜)の主成分は重合ロジンであり、酸化防止膜は140℃で軟化し始めるとみなすことができる。
半田ペースト中の重合ロジン、および/または、仮止め膜中の水素添加ロジンを、他のロジンに変更することを除いて、実験例1と同様の配合比で、半田ペーストと仮止め膜の材料とを準備した。そして、それらを用いて実験例1と同様の方法で、実験例2~5の電子部品実装基板を作製した。
本発明を現時点での好ましい実施態様に関して説明したが、そのような開示を限定的に解釈してはならない。種々の変形および改変は、上記開示を読むことによって本発明に属する技術分野における当業者には間違いなく明らかになるであろう。したがって、添付の請求の範囲は、本発明の真の精神および範囲から逸脱することなく、すべての変形および改変を包含する、と解釈されるべきものである。
10X、10Y:基板
10b :ランド
10sa :上面
10sb :下面
11 :半田プリコート
11a :半田粒子
11c、11d :半田
11f :フラックス
11k :切り欠き部
11p :半田ペースト
11t :上面
12 :酸化防止膜
13 :仮止め膜
30 :電子部品
Claims (5)
- 電子部品実装基板の製造方法であって、
基板の複数のランド上に形成された複数の半田プリコートと前記複数の半田プリコートのそれぞれを覆うように形成された酸化防止膜とを覆うように仮止め膜を形成する工程(i)と、
前記酸化防止膜および前記仮止め膜を介して複数の電子部品を前記複数の半田プリコート上に配置する工程(ii)と、
前記複数の半田プリコートを溶融させることによって前記複数の電子部品を前記複数のランドに半田付けする工程(iii)とを含み、
前記酸化防止膜は第1の熱可塑性樹脂を含み、
前記仮止め膜は活性剤と第2の熱可塑性樹脂とを含み、
前記第1の熱可塑性樹脂の軟化点は、前記第2の熱可塑性樹脂の軟化点以下である、電子部品実装基板の製造方法。 - 前記複数の電子部品のうちの任意の電子部品が配置される第1のランドと、前記任意の電子部品に隣接する電子部品が配置される第2のランドとの最短距離が、0.4mm以下である、請求項1に記載の製造方法。
- 前記工程(i)の前に、前記複数のランド上に前記複数の半田プリコートおよび前記酸化防止膜を形成する工程(x)を含む、請求項1または2に記載の製造方法。
- 前記工程(x)の後であって前記工程(i)の前に、前記複数の半田プリコートおよび前記酸化防止膜を前記基板の上方から押圧することによって、前記酸化防止膜に亀裂を入れるとともに前記複数の半田プリコートの上面を平坦化する工程(y)をさらに含む、請求項3に記載の製造方法。
- 前記工程(i)において、少なくとも1つの前記半田プリコートが、隣接する2つの前記ランドを短絡させるように不適切に形成された場合に、
前記工程(x)の後であって前記工程(i)の前に、不適切に形成された前記半田プリコートのうち2つの前記ランド間の上方に存在する部分に切り欠き部を形成する工程(z)をさらに含む、請求項3または4に記載の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280039292.2A CN117413624A (zh) | 2021-06-03 | 2022-02-21 | 电子部件安装基板的制造方法 |
JP2023525392A JPWO2022254819A1 (ja) | 2021-06-03 | 2022-02-21 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021093900 | 2021-06-03 | ||
JP2021-093900 | 2021-06-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022254819A1 true WO2022254819A1 (ja) | 2022-12-08 |
Family
ID=84324199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/006966 WO2022254819A1 (ja) | 2021-06-03 | 2022-02-21 | 電子部品実装基板の製造方法 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPWO2022254819A1 (ja) |
CN (1) | CN117413624A (ja) |
WO (1) | WO2022254819A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01150493A (ja) * | 1987-12-08 | 1989-06-13 | Asahi Chem Res Lab Ltd | はんだ付け用一時接着剤 |
JPH0690078A (ja) * | 1992-09-07 | 1994-03-29 | Harima Chem Inc | プリコート基板の製造方法 |
JPH07183650A (ja) * | 1993-12-22 | 1995-07-21 | Matsushita Electric Ind Co Ltd | 電子部品の実装方法 |
JPH08288638A (ja) * | 1995-04-11 | 1996-11-01 | Toshiba Corp | 半導体装置のはんだ付け方法 |
JPH11214441A (ja) * | 1998-01-26 | 1999-08-06 | Matsushita Electric Ind Co Ltd | バンプ付電子部品の実装方法 |
JP2004047772A (ja) * | 2002-07-12 | 2004-02-12 | Matsushita Electric Ind Co Ltd | 電子部品の接合材料および電子部品実装方法 |
-
2022
- 2022-02-21 CN CN202280039292.2A patent/CN117413624A/zh active Pending
- 2022-02-21 WO PCT/JP2022/006966 patent/WO2022254819A1/ja active Application Filing
- 2022-02-21 JP JP2023525392A patent/JPWO2022254819A1/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01150493A (ja) * | 1987-12-08 | 1989-06-13 | Asahi Chem Res Lab Ltd | はんだ付け用一時接着剤 |
JPH0690078A (ja) * | 1992-09-07 | 1994-03-29 | Harima Chem Inc | プリコート基板の製造方法 |
JPH07183650A (ja) * | 1993-12-22 | 1995-07-21 | Matsushita Electric Ind Co Ltd | 電子部品の実装方法 |
JPH08288638A (ja) * | 1995-04-11 | 1996-11-01 | Toshiba Corp | 半導体装置のはんだ付け方法 |
JPH11214441A (ja) * | 1998-01-26 | 1999-08-06 | Matsushita Electric Ind Co Ltd | バンプ付電子部品の実装方法 |
JP2004047772A (ja) * | 2002-07-12 | 2004-02-12 | Matsushita Electric Ind Co Ltd | 電子部品の接合材料および電子部品実装方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022254819A1 (ja) | 2022-12-08 |
CN117413624A (zh) | 2024-01-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110961829A (zh) | 助焊剂及其制备方法、锡膏及其制备方法 | |
KR20100106473A (ko) | 땜납 접합 구조 및 납땜용 플럭스 | |
JPS63140792A (ja) | ろう組成物 | |
JPWO2005072906A1 (ja) | 半田付用のフラックスおよび半田付方法 | |
JP2014100737A (ja) | レーザーはんだ付け用はんだ組成物およびそれを用いたプリント配線基板 | |
US20150102090A1 (en) | Flux, Solder Composition, and Method for Manufacturing Electronic Circuit Mounted Substrate | |
JP6683244B2 (ja) | 接合材料及び接合体の製造方法 | |
JPWO2018096917A1 (ja) | はんだ付け方法 | |
JP2016078095A (ja) | はんだバンプの形成方法 | |
JPH07144293A (ja) | 窒素リフロー用低残渣クリームはんだ | |
KR101209517B1 (ko) | 솔더 페이스트용 플럭스, 솔더 페이스트 및 솔더 범프, 그리고 이들의 제조 방법 | |
WO2022254819A1 (ja) | 電子部品実装基板の製造方法 | |
JP2011147982A (ja) | はんだ、電子部品、及び電子部品の製造方法 | |
WO2022254818A1 (ja) | 電子部品実装基板の製造方法 | |
JP2013110403A (ja) | リフローフィルム、はんだバンプ形成方法、はんだ接合の形成方法及び半導体装置 | |
CN109530977B (zh) | 助焊剂及焊膏 | |
KR102122166B1 (ko) | 솔더 페이스트용 플럭스, 솔더 페이스트, 솔더 페이스트를 사용한 솔더 범프의 형성 방법 및 접합체의 제조 방법 | |
JP2719832B2 (ja) | はんだペースト | |
JP4008799B2 (ja) | 無鉛はんだペースト組成物およびはんだ付け方法 | |
JP4819624B2 (ja) | はんだ付け用フラックスおよびはんだペースト組成物 | |
TW201607992A (zh) | 助焊劑組成物 | |
JP6506046B2 (ja) | はんだバンプのリフロー方法 | |
JP5635561B2 (ja) | はんだ組成物 | |
JP2002144077A (ja) | はんだ付け方法及びソルダペースト | |
JPH0929480A (ja) | はんだペースト |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22815578 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023525392 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280039292.2 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22815578 Country of ref document: EP Kind code of ref document: A1 |