JP6998557B2 - はんだ合金およびそれを用いた接合構造体 - Google Patents
はんだ合金およびそれを用いた接合構造体 Download PDFInfo
- Publication number
- JP6998557B2 JP6998557B2 JP2017191443A JP2017191443A JP6998557B2 JP 6998557 B2 JP6998557 B2 JP 6998557B2 JP 2017191443 A JP2017191443 A JP 2017191443A JP 2017191443 A JP2017191443 A JP 2017191443A JP 6998557 B2 JP6998557 B2 JP 6998557B2
- Authority
- JP
- Japan
- Prior art keywords
- content
- less
- alloy
- solder
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910045601 alloy Inorganic materials 0.000 title claims description 111
- 239000000956 alloy Substances 0.000 title claims description 111
- 229910000679 solder Inorganic materials 0.000 title claims description 101
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 239000002184 metal Substances 0.000 claims description 42
- 229910052725 zinc Inorganic materials 0.000 claims description 37
- 229910052804 chromium Inorganic materials 0.000 claims description 33
- 239000004065 semiconductor Substances 0.000 claims description 30
- 229910008433 SnCU Inorganic materials 0.000 claims description 9
- 229910006414 SnNi Inorganic materials 0.000 claims description 9
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 description 33
- 238000007747 plating Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 238000011156 evaluation Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 229910006913 SnSb Inorganic materials 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 238000005304 joining Methods 0.000 description 7
- 239000006104 solid solution Substances 0.000 description 7
- 238000009864 tensile test Methods 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- -1 and for example Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- MKYBYDHXWVHEJW-UHFFFAOYSA-N N-[1-oxo-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propan-2-yl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(C(C)NC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 MKYBYDHXWVHEJW-UHFFFAOYSA-N 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000003252 repetitive effect Effects 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 229910018320 SbSn Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910005642 SnTe Inorganic materials 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
- B23K35/262—Sn as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
- C22C13/02—Alloys based on tin with antimony or bismuth as the next major constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L24/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L24/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L24/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/81—Structural details of the junction
- H10N10/817—Structural details of the junction the junction being non-separable, e.g. being cemented, sintered or soldered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/42—Printed circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/05099—Material
- H01L2224/051—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05117—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 400°C and less than 950°C
- H01L2224/05124—Aluminium [Al] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/05099—Material
- H01L2224/051—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/05155—Nickel [Ni] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/05099—Material
- H01L2224/051—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05163—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than 1550°C
- H01L2224/05166—Titanium [Ti] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/05001—Internal layers
- H01L2224/05099—Material
- H01L2224/051—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05163—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than 1550°C
- H01L2224/05171—Chromium [Cr] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/0554—External layer
- H01L2224/05599—Material
- H01L2224/056—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05638—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/05647—Copper [Cu] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/0554—External layer
- H01L2224/05599—Material
- H01L2224/056—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/05638—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/05655—Nickel [Ni] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/28—Structure, shape, material or disposition of the layer connectors prior to the connecting process
- H01L2224/29—Structure, shape, material or disposition of the layer connectors prior to the connecting process of an individual layer connector
- H01L2224/29001—Core members of the layer connector
- H01L2224/29099—Material
- H01L2224/291—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/29101—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of less than 400°C
- H01L2224/29111—Tin [Sn] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32225—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/32227—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation the layer connector connecting to a bond pad of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32245—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/32258—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic the layer connector connecting to a bonding area protruding from the surface of the item
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/325—Material
- H01L2224/32501—Material at the bonding interface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/325—Material
- H01L2224/32501—Material at the bonding interface
- H01L2224/32503—Material at the bonding interface comprising an intermetallic compound
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/83053—Bonding environment
- H01L2224/83095—Temperature settings
- H01L2224/83096—Transient conditions
- H01L2224/83097—Heating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/8319—Arrangement of the layer connectors prior to mounting
- H01L2224/83192—Arrangement of the layer connectors prior to mounting wherein the layer connectors are disposed only on another item or body to be connected to the semiconductor or solid-state body
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/8338—Bonding interfaces outside the semiconductor or solid-state body
- H01L2224/83399—Material
- H01L2224/834—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/83438—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/83447—Copper [Cu] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/8338—Bonding interfaces outside the semiconductor or solid-state body
- H01L2224/83399—Material
- H01L2224/834—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
- H01L2224/83438—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/83455—Nickel [Ni] as principal constituent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
- H01L2224/838—Bonding techniques
- H01L2224/83801—Soldering or alloying
- H01L2224/8381—Soldering or alloying involving forming an intermetallic compound at the bonding interface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L24/83—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a layer connector
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Die Bonding (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
しかし、150℃以上のヒートサイクル試験に耐え得る接続信頼性を実現するには至っていない。そのため、高温で動作するパワーモジュール等の接続信頼性において、十分な接合信頼性の実現が求められている。
Teの含有率が0.01wt%以上1.5wt%以下、且つ、
Zn、Co、Crからなる群の少なくとも1種の元素の含有率が0.005wt%以上1wt%以下であり、残部がSnである。
第2金属層を含む回路基板と、
前記半導体素子の前記第1金属層と前記回路基板の前記第2金属層とを接合する、少なくともSnとSbとTeとを含むと共に、Zn、Co、Crからなる群の少なくとも1種の元素を含むはんだ接合層と、
を含み、
前記半導体素子の前記第1金属層と前記はんだ接合層との界面、および、前記回路基板の前記第2金属層と前記はんだ接合層との界面にSnNi合金またはSnCu合金が含まれる。
Teの含有率が0.01wt%以上1.5wt%以下、且つ、
Zn、Co、Crからなる群の少なくとも1種の元素の含有率が0.005wt%以上1wt%以下であり、残部がSnである。
第2金属層を含む回路基板と、
前記半導体素子の前記第1金属層と前記回路基板の前記第2金属層とを接合する、少なくともSnとSbとTeとを含むと共に、Zn、Co、Crからなる群の少なくとも1種の元素を含むはんだ接合層と、
を含み、
前記半導体素子の前記第1金属層と前記はんだ接合層との界面、および、前記回路基板の前記第2金属層と前記はんだ接合層との界面にSnNi合金またはSnCu合金が含まれる。
まず、はんだ合金の部材の詳細と製造方法を下記に示す。
はんだ合金105は、Sbと、Teと、Zn、Co、Crからなる群の少なくとも1元素とを含み、残部がSnである合金である。
はんだ合金105におけるSbの含有率は3wt%以上15wt%以下である。はんだ合金におけるSbの含有率がこのような範囲にあることにより、はんだ接合部の熱疲労特性を改善することができる。
はんだ合金105におけるTeの含有率は0.01wt%以上1.5wt%以下であり、Zn、Co、Crからなる群の少なくとも1元素の含有率は0.005wt%以上1wt%以下であり、残部はSnである。
実施の形態に係る接合構造体は、メタライズ層(第1金属層)104を含む半導体素子101と、めっき層(第2金属層)108を含む回路基板106と、半導体素子101のメタライズ層104と回路基板106のめっき層108とを接合するはんだ接合層203と、を含む。はんだ接合層203は、少なくともSnとSbとTeとを含むと共に、Zn、Co、Crからなる群の少なくとも1種の元素を含む。また、半導体素子101のメタライズ層104とはんだ接合層203との界面、および、回路基板106のめっき層108とはんだ接合層203との界面には、SnNi合金またはSnCu合金が含まれる。
半導体素子101は、シリコンチップ102と、シリコンチップ102の下面に形成されたオーミック層103と、オーミック層103の下面に形成されたメタライズ層(第1金属層)104と、を含む。
シリコンチップ102は、製造の容易性に関して、縦の長さが10mm、横の長さが10mmであり、かつ、0.2mmの厚みを有することが好ましいが、これに限定されず、様々な寸法を有し得る。
回路基板106は、リードフレーム107と、リードフレーム107の表面に形成されためっき層(第2金属層)108とを含む。
回路基板106のリードフレーム107の材料には、金属またはセラミックス等の熱伝導性のよい材料を用いることができる。リードフレーム107の材料としては例えば、銅、アルミ、アルミナ、窒化アルミ、窒化ケイ素等を使用することができるが、これらに限定されない。リードフレーム107は、製造の容易性に関して、縦の長さが20mm、横の長さが20mmであり、かつ、1mmの厚みを有することが好ましいが、これに限定されず、様々な寸法を有し得る。
回路基板106のめっき層(第2金属層)108は、任意の純金属または合金からなる層であり、例えばNi、Cuまたはこれらの金属を含む合金等を使用することができるが、これらに限定されない。めっき層の厚みは特に限定されないが、例えば0.5μm以上10μm以下であってよく、例えば1μmであってよい。めっき層がこのような厚みを有することにより、はんだ合金と強固に接合させることができるようになる。
本実施の形態に係るはんだ合金を用いて製造される接合構造体201は、図2に模式図で表されている。接合構造体201は、半導体素子101と、回路基板106とが、合金層202と、はんだ接合層203とを介して接合された構造を有している。
(1)まず、図1に示すように、回路基板106のめっき層(第2金属層)108上にはんだ合金105を載せ、さらに、はんだ合金105と半導体素子101のメタライズ層(第1金属層)104とが接するように、はんだ合金105の上に半導体素子101を設置する。
(2)続いて毎分10℃ずつ温度を上昇させながら、室温から300℃までの加熱を行い、300℃において1分保持した後、毎分10℃ずつ温度を低下させながら300℃から室温までの冷却を行う。
以上により、はんだ合金105とメタライズ層104およびめっき層108との間に、合金層202を形成し、図2に示すような接合構造体201を製造することができる。
実施例1、比較例2では、ヒートサイクル時に発生する繰返しの応力に対し、はんだ合金の高温での伸びにより、応力を吸収できると推測し、はんだ合金の伸びを確認した。
次に、実施例2から実施例5と比較例2から5では、実施例1で確認されたはんだ合金の高温での伸びの向上が、ヒートサイクル時に発生するはんだ合金のクラックを抑制することを確認するために、実際のパワーモジュールに近い実装構造体の形状で評価した。ここでは、耐クラック性を向上できるはんだ合金組成を検証するため各元素の添加量を変化させている。
表1に示すように、Sb含有率、Te含有率、Zn含有率、Co含有率、Cr含有率を変え、残部をSnとして複数のはんだ合金105を準備し、200℃の雰囲気温度で引張試験を行った。
引張試験のために、はんだ合金をダンベル状の形状に鋳込んだ評価サンプルを作製した。評価サンプルの形状は、引張試験に固定する部分が直径6mm、長さ20mm、ダンベルのくびれ部分が直径3mm、長さ20mmとした。引張試験機の上下のサンプル固定冶具の間隔を20mmに設定して、評価サンプルを固定し、雰囲気温度を200℃とした後で、評価サンプルの軸方向の力だけが加わるように評価サンプルを引張試験機で引っ張ることによって、評価サンプルの引張試験を行った。
ヒートサイクル試験を150℃から175℃に温度上昇させるため、温度上昇は約1.2倍となっており、伸びの割合も1.2倍以上を合格基準と設定した。
引張試験における伸び(%)の測定結果を表1に併せて示した。
これらは、Znを含有しない比較例1-1における87%の伸びと、比較例1-2における90%の伸びに比べて良好な結果であった。
同様に、実施例1-3は、Sb含有率が3wt%、Te含有率が0.01wt%、Co含有率が0.005wt%で123%であり、実施例1-4は、Sb含有率が15wt%、Te含有率が0.01wt%、Co含有率が0.005wt%で119%であった。
これらは、Zn,Co、Crを含有せずTeの含有量を増加させた比較例1-3の89%、比較例1-4の91%より良好な結果であった。
上記の結果より、実施例1-1から1-6では、比較例で最も伸びの値が大きかった比較例1-4の91%に対して、1.2倍の109%以上の伸びが得られたことより合格基準を満たしていた。
接合構造体の実施例2-1から2-36は、はんだ合金105の組成がSb含有率3wt%以上15wt%以下、Te含有率0.01wt%以上1.5wt%以下、Zn含有率0.005wt%以上1wt%以下、および、残部がSnの合金を用い作製した。
実施例2では、実施例1で確認したはんだ合金の高温伸びの向上が、実際のパワーモジュールに近い実装構造体において、高信頼性を実現することを検証した。また、各添加元素であるSb、Te、Znの含有量を変化させて効果が発現する元素範囲を確認した。
Sb含有率は、SnSb化合物による析出強化の効果が得られる添加量とした。TeおよびZnの添加量は、はんだ合金に固溶し固溶強化の効果が得られる最小量と、固溶限を越えて析出しない最大量を添加量し、ヒートサイクル試験を実施した。それぞれの組成範囲において、析出強化と固溶強化の両方の組織強化が可能となる。また、実施例3から5においても、同様の組成範囲で検証を行った。
比較例2-1と比較例2-2は、はんだ合金の組成が、Sb含有率7wt%、Te含有率0.01wt%以上1.5wt%以下、残部がSnの合金を用い作製した。
比較例2-3から比較例2-12は、はんだ合金の組成が、Sb含有率2wt%と16wt%、Te含有率0.01wt%以上1.5wt%以下、Zn含有率0.005wt%以上1wt%以下、および、残部がSnの合金を用い作製した。
作製した実施例2-1~2-36および比較例2-1~2-12の接合構造体は、半導体用封止樹脂にてモールドを施した後に、ヒートサイクル試験を行い、耐クラック性の評価を行った。ヒートサイクル試験は液槽試験槽を用いて-40℃、175℃各5分を1サイクルとし、500サイクル行った。試験後のサンプルを超音波顕微鏡で観察し、剥離面積を接合面積で割ってクラック率を算出した。クラック率が25%以上だとシリコンチップの発熱をリードフレームに効率的に逃がせなくなるため、25%以上を×、25%未満から10%以上を○、10%未満を◎とした。
各はんだ合金組成とヒートサイクル試験後のクラック率と判定結果を表2に併せて示した。
さらに、実施例2-2、2-3、2-6、2-7、2-14、2-15、2-18、2-19、2-26、2-27、2-30、2-31に示すとおり、Sb含有率が3wt%以上15wt%以下、Te含有率が0.05wt%以上0.5wt%以下、Zn含有率が0.005wt%以上0.1wt%以下の場合、クラック率が10%未満となり非常に良好な結果が得られた。
比較例2-3に示すとおり、Zn含有率が1.5wt%の場合、クラック率が29%となり、判定はバツであった。
比較例2-4に示すとおり、Zn含有率が0.001wt%の場合、クラック率が25%となり、判定は×であった。
比較例2-5から2-12のように、Sb含有率が、2wt%、16wt%の場合もクラック率が25%以上となり、判定は×であった。
SnSb系のはんだの場合、SnSb化合物が形成され、はんだ中に分散されることで、分散強化によって、はんだの信頼性が向上している。実施例2-1から2-36のようにSnにSbとTeとZnとを含有することで、SbSn化合物が微細に分散され、さらに、TeとZnがSnに固溶することで、転位が発生し高温での伸びが向上したと推測される。
比較例2-1、2-2に示すとおり、Znを添加せずTeだけの添加では、ZnとTeと添加した場合より、信頼性が低下している。これは、Snにイオン半径の異なる2種の元素を固溶させた場合と比較して、転位が少ないため高温伸びが向上せず、信頼性の向上には至らなかったと推測される。
比較例2-3に示すとおり、Zn含有率が1.5wt%の場合、Zn含有率が多いため、Snに固溶し切れずZn合金が析出し、信頼性の向上には至らなかったと推測される。
比較例2-5から2-8に示すとおり、Sb含有率が2wt%の場合、TeとZnを添加してもヒートサイクルの判定は×であった。これは、SnSb化合物が少なく、分散強化の効果が低いためと推測される。
比較例2-9から2-12に示すとおり、Sb含有率が16wt%の場合、TeとZnを添加してもヒートサイクルの判定は×であった。これは、Sbが15wt%を上回る場合には、SnSb化合物の析出により強度が向上するが、はんだ合金の延性が低下するために、耐クラック性が低下したと推測される。
さらに、Sb含有率が3wt%以上15wt%以下、Te含有率が0.05wt%以上0.5wt%以下、Zn含有率が0.005wt%以上0.1wt%以下の場合、クラック率が10%未満となり非常に良好な結果が得られた。
実施例2では、実施例1で確認したはんだ合金の高温伸びの向上が、実際のパワーモジュールに近い実装構造体において、高信頼性を実現することを検証した。また、各添加元素であるSb、Te、CoもしくはCrの含有量を変化させて効果が発現する元素範囲を確認した。
実施例3では実施例2のZnをCoに変更し、実施例4では、実施例2のZnをCrに変更し、それ以外は実施例2と同条件で接合構造体の作製とヒートサイクル試験を実施した。
比較例3では比較例2のZnをCoに変更し、比較例4では、比較例2のZnをCrに変更し、比較例2と同条件で接合構造体の作製とヒートサイクル試験を実施した。
各はんだ合金組成とヒートサイクル試験後のクラック率と判定結果を表3、表4に併せて示した。
さらに、Sb含有率が3wt%以上15wt%以下、Te含有率が0.05wt%以上0.5wt%以下、Co含有率が0.005wt%以上0.1wt%以下の場合、クラック率が10%未満となり非常に良好な結果が得られた。
さらに、Sb含有率が3wt%以上15wt%以下、Te含有率が0.05wt%以上0.5wt%以下、Cr含有率が0.005wt%以上0.1wt%以下の場合、クラック率が10%未満となり非常に良好な結果が得られた。
このように、添加元素にZn、Co、Crを用いることで、信頼性が向上することが確認された。
実施例5では、実施例1で確認したはんだ合金の高温伸びの向上が、実際のパワーモジュールに近い実装構造体において、高信頼性を実現することを検証した。また、各添加元素であるSb、Te、Zn、Co、Crの全てを添加し、含有量を変化させて効果が発現する元素範囲を確認した。実施例5では、実施例2から実施例4で得られた結果より、Zn、Co、Crの総添加量が0.005wt%以上、1wt%以下となるようにし、実施例1で行った組成範囲を含むように元素の上下限の組成を決め検証を行っている。
比較例5では比較例2のようにZnだけでなく、Co、Crも添加したはんだ合金に変更し、比較例2と同条件で接合構造体の作製とヒートサイクル試験を実施した。
各はんだ合金組成とヒートサイクル試験後のクラック率と判定結果を表5に併せて示した。
Sb含有率が2wt%の場合、SnSb化合物が少なく、分散強化の効果が低いためと推測される。Sb含有率が16wt%の場合、SnSb化合物の析出により強度が向上するが、はんだ合金の延性が低下するために、耐クラック性が低下したと推測される。
102 シリコンチップ
103 オーミック層
104 メタライズ層(第1金属層)
105 はんだ合金
106 回路基板
107 リードフレーム
108 めっき層(第2金属層)
201 接合構造体
202 合金層
203 はんだ接合層
Claims (6)
- Sbの含有率が3wt%以上15wt%以下、且つ、
Teの含有率が0.01wt%以上1.5wt%以下、且つ、
Zn、Co、Crからなる群の少なくとも1種の元素の含有率が0.005wt%以上1wt%以下であり、残部がSnであり、
前記Znと前記Coと前記Crの元素の含有率の合計が0.005wt%以上1wt%以下である、はんだ合金。 - 前記Znの含有率が0.005wt%以上1wt%以下である、請求項1に記載のはんだ合金。
- 前記Coの含有率が0.005wt%以上1wt%以下である、請求項1に記載のはんだ合金。
- 前記Crの含有率が0.005wt%以上1wt%以下である、請求項1に記載のはんだ合金。
- 第1金属層を含む半導体素子と、
第2金属層を含む回路基板と、
前記半導体素子の前記第1金属層と前記回路基板の前記第2金属層とを接合する、SnとSbとTeとを含むと共に、Zn、Co、Crからなる群の少なくとも1種の元素を含むはんだ接合層と、
を含み、
前記半導体素子の前記第1金属層と前記はんだ接合層との界面、および、前記回路基板の前記第2金属層と前記はんだ接合層との界面にSnNi合金またはSnCu合金が含まれ、
前記はんだ接合層は、請求項1から4のいずれか一項に記載のはんだ合金である、接合構造体。 - 前記SnNi合金またはSnCu合金が、Te、Zn、Co、Crからなる群の少なくとも1種の元素を含む、請求項5に記載の接合構造体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017191443A JP6998557B2 (ja) | 2017-09-29 | 2017-09-29 | はんだ合金およびそれを用いた接合構造体 |
EP18195324.1A EP3461580B1 (en) | 2017-09-29 | 2018-09-19 | Solder alloy and junction structure using same |
US16/137,108 US11135683B2 (en) | 2017-09-29 | 2018-09-20 | Solder alloy and junction structure using same |
CN201811120584.0A CN109570813B (zh) | 2017-09-29 | 2018-09-25 | 焊料合金和使用其的接合结构体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017191443A JP6998557B2 (ja) | 2017-09-29 | 2017-09-29 | はんだ合金およびそれを用いた接合構造体 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019063824A JP2019063824A (ja) | 2019-04-25 |
JP6998557B2 true JP6998557B2 (ja) | 2022-01-18 |
Family
ID=63642783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2017191443A Active JP6998557B2 (ja) | 2017-09-29 | 2017-09-29 | はんだ合金およびそれを用いた接合構造体 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11135683B2 (ja) |
EP (1) | EP3461580B1 (ja) |
JP (1) | JP6998557B2 (ja) |
CN (1) | CN109570813B (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113182726A (zh) * | 2021-04-07 | 2021-07-30 | 河南鸿昌电子有限公司 | 一种焊接半导体所用的焊锡和焊锡的使用方法 |
EP4140635A1 (en) * | 2021-08-31 | 2023-03-01 | Infineon Technologies AG | Semiconductor device with a ni comprising layer and method for fabricating the same |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000015478A (ja) | 1998-06-30 | 2000-01-18 | Toshiba Corp | ハンダ材 |
JP2004106027A (ja) | 2002-09-19 | 2004-04-08 | Sumitomo Metal Mining Co Ltd | ろう材、これを用いた半導体装置の組み立て方法並びに半導体装置 |
JP2004165342A (ja) | 2002-11-12 | 2004-06-10 | Sumitomo Metal Mining Co Ltd | ハーメチックシール方法および半導体装置 |
CN102581507A (zh) | 2012-01-19 | 2012-07-18 | 广东中实金属有限公司 | 一种锡锌铋多元共晶无铅钎料及制备方法 |
JP2012176433A (ja) | 2010-11-19 | 2012-09-13 | Murata Mfg Co Ltd | 導電性材料、それを用いた接続方法、および接続構造 |
JP2014007227A (ja) | 2012-06-22 | 2014-01-16 | Murata Mfg Co Ltd | 電子部品モジュールおよびその製造方法 |
JP2014057974A (ja) | 2012-09-14 | 2014-04-03 | Senju Metal Ind Co Ltd | はんだ合金 |
WO2016059744A1 (ja) | 2014-10-17 | 2016-04-21 | 富士電機株式会社 | 鉛フリー半田付け方法及び半田付け物品 |
JP2017508622A (ja) | 2013-12-31 | 2017-03-30 | アルファ・メタルズ・インコーポレイテッドAlpha Metals, Inc. | ロジンフリー熱硬化性フラックス配合物 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1461371A (en) * | 1975-02-19 | 1977-01-13 | Glacier Metal Co Ltd | Bearing alloys |
DE2818099C2 (de) * | 1978-04-25 | 1986-02-20 | Fürstlich Hohenzollernsche Hüttenverwaltung Laucherthal, 7480 Sigmaringen | Weißmetall-Legierung und deren Verwendung |
GB8324353D0 (en) * | 1983-09-12 | 1983-10-12 | Darchem Ltd | Materials |
EP0652072A1 (en) * | 1993-11-09 | 1995-05-10 | Matsushita Electric Industrial Co., Ltd. | Solder |
US5851482A (en) * | 1996-03-22 | 1998-12-22 | Korea Institute Of Machinery & Metals | Tin-bismuth based lead-free solder for copper and copper alloys |
JP2002368293A (ja) | 2001-06-05 | 2002-12-20 | Aisin Seiki Co Ltd | 熱電モジュール、熱電モジュールの製造方法、熱電装置、ファイバ投光装置 |
JPWO2003021664A1 (ja) | 2001-08-31 | 2005-07-07 | 株式会社日立製作所 | 半導体装置、構造体及び電子装置 |
TW201210733A (en) | 2010-08-26 | 2012-03-16 | Dynajoin Corp | Variable melting point solders |
TWI461252B (zh) * | 2010-12-24 | 2014-11-21 | Murata Manufacturing Co | A bonding method, a bonding structure, an electronic device, an electronic device manufacturing method, and an electronic component |
CN103796788A (zh) * | 2011-09-16 | 2014-05-14 | 株式会社村田制作所 | 导电性材料、使用该导电性材料的连接方法和连接结构物 |
EP3127652B1 (en) * | 2014-04-02 | 2018-10-24 | Senju Metal Industry Co., Ltd | Use of a solder alloy for bonding in an led module, and led module |
WO2016179358A1 (en) * | 2015-05-05 | 2016-11-10 | Indium Corporation | High reliability lead-free solder alloys for harsh environment electronics applications |
KR101925760B1 (ko) * | 2016-03-22 | 2018-12-05 | 가부시키가이샤 다무라 세이사쿠쇼 | 납 프리 땜납 합금, 플럭스 조성물, 솔더 페이스트 조성물, 전자 회로 기판 및 전자 제어 장치 |
-
2017
- 2017-09-29 JP JP2017191443A patent/JP6998557B2/ja active Active
-
2018
- 2018-09-19 EP EP18195324.1A patent/EP3461580B1/en active Active
- 2018-09-20 US US16/137,108 patent/US11135683B2/en active Active
- 2018-09-25 CN CN201811120584.0A patent/CN109570813B/zh active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000015478A (ja) | 1998-06-30 | 2000-01-18 | Toshiba Corp | ハンダ材 |
JP2004106027A (ja) | 2002-09-19 | 2004-04-08 | Sumitomo Metal Mining Co Ltd | ろう材、これを用いた半導体装置の組み立て方法並びに半導体装置 |
JP2004165342A (ja) | 2002-11-12 | 2004-06-10 | Sumitomo Metal Mining Co Ltd | ハーメチックシール方法および半導体装置 |
JP2012176433A (ja) | 2010-11-19 | 2012-09-13 | Murata Mfg Co Ltd | 導電性材料、それを用いた接続方法、および接続構造 |
CN102581507A (zh) | 2012-01-19 | 2012-07-18 | 广东中实金属有限公司 | 一种锡锌铋多元共晶无铅钎料及制备方法 |
JP2014007227A (ja) | 2012-06-22 | 2014-01-16 | Murata Mfg Co Ltd | 電子部品モジュールおよびその製造方法 |
JP2014057974A (ja) | 2012-09-14 | 2014-04-03 | Senju Metal Ind Co Ltd | はんだ合金 |
JP2017508622A (ja) | 2013-12-31 | 2017-03-30 | アルファ・メタルズ・インコーポレイテッドAlpha Metals, Inc. | ロジンフリー熱硬化性フラックス配合物 |
WO2016059744A1 (ja) | 2014-10-17 | 2016-04-21 | 富士電機株式会社 | 鉛フリー半田付け方法及び半田付け物品 |
Also Published As
Publication number | Publication date |
---|---|
US20190099840A1 (en) | 2019-04-04 |
CN109570813A (zh) | 2019-04-05 |
CN109570813B (zh) | 2021-07-16 |
EP3461580B1 (en) | 2023-02-08 |
JP2019063824A (ja) | 2019-04-25 |
EP3461580A1 (en) | 2019-04-03 |
US11135683B2 (en) | 2021-10-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6355092B1 (ja) | はんだ合金およびそれを用いた接合構造体 | |
JP6730999B2 (ja) | 過酷な環境での電子機器用途のための高信頼性無鉛はんだ合金 | |
JP6642865B2 (ja) | はんだ接合部 | |
JP6516013B2 (ja) | 半導体装置用はんだ材 | |
JP5614507B2 (ja) | Sn−Cu系鉛フリーはんだ合金 | |
JP3796181B2 (ja) | 無鉛ハンダ合金、ハンダボール及びハンダバンプを有する電子部材 | |
CN107635716B (zh) | 用于严苛环境电子器件应用的高可靠性无铅焊料合金 | |
WO2015083661A1 (ja) | はんだ材料および接合構造体 | |
JP2013013916A (ja) | 金属間化合物含有鉛フリーはんだ合金及びその製造方法 | |
JPWO2020122253A1 (ja) | はんだ合金、はんだペースト、はんだプリフォーム及びはんだ継手 | |
JP5784109B2 (ja) | 鉛フリーはんだ合金 | |
CN109641323B (zh) | 软钎焊材料 | |
JP6998557B2 (ja) | はんだ合金およびそれを用いた接合構造体 | |
JP6355091B1 (ja) | はんだ合金およびそれを用いた接合構造体 | |
JP6136878B2 (ja) | Bi基はんだ合金とその製造方法、並びにそれを用いた電子部品のボンディング方法および電子部品実装基板 | |
TWI818752B (zh) | 焊料合金、焊錫球、預成型錫片、焊錫膏及焊接點 | |
TWI795778B (zh) | 無鉛焊料合金、焊料球、焊膏及半導體裝置 | |
JP4890221B2 (ja) | ダイボンド材 | |
JP6887183B1 (ja) | はんだ合金および成形はんだ | |
JP7273049B2 (ja) | 電子用途のコスト効率の良い鉛フリーはんだ合金 | |
JP2020006403A (ja) | 接合体とそれを用いた半導体装置 | |
JP2015020189A (ja) | Auを主成分とするPbフリーAu−Ge−Sn系はんだ合金 | |
JP2018099712A (ja) | はんだ合金およびそれを用いた接合構造体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20200515 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20210329 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20210511 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20210611 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20211124 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20211206 |
|
R151 | Written notification of patent or utility model registration |
Ref document number: 6998557 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R151 |