WO2014185301A1 - 搭載装置、その製造方法、その製造方法に用いるスパッタリングターゲット - Google Patents
搭載装置、その製造方法、その製造方法に用いるスパッタリングターゲット Download PDFInfo
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- WO2014185301A1 WO2014185301A1 PCT/JP2014/062186 JP2014062186W WO2014185301A1 WO 2014185301 A1 WO2014185301 A1 WO 2014185301A1 JP 2014062186 W JP2014062186 W JP 2014062186W WO 2014185301 A1 WO2014185301 A1 WO 2014185301A1
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- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/14—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using spraying techniques to apply the conductive material, e.g. vapour evaporation
- H05K3/16—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using spraying techniques to apply the conductive material, e.g. vapour evaporation by cathodic sputtering
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C9/01—Alloys based on copper with aluminium as the next major constituent
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- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
- C23C14/205—Metallic material, boron or silicon on organic substrates by cathodic sputtering
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
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- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0366—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement reinforced, e.g. by fibres, fabrics
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- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/115—Via connections; Lands around holes or via connections
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- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
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- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/18—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material
- H05K3/188—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using precipitation techniques to apply the conductive material by direct electroplating
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- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
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- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
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- 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
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump 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
- H01L2224/16221—Disposition the bump 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
- H01L2224/16225—Disposition the bump 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
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- 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
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump 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
- H01L2224/16221—Disposition the bump 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
- H01L2224/16225—Disposition the bump 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
- H01L2224/16227—Disposition the bump 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 bump connector connecting to a bond pad of the item
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/151—Die mounting substrate
- H01L2924/153—Connection portion
- H01L2924/1531—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface
- H01L2924/15311—Connection portion the connection portion being formed only on the surface of the substrate opposite to the die mounting surface being a ball array, e.g. BGA
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- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
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Definitions
- the present invention relates to a mounting apparatus having a patterned wiring film, a manufacturing method for manufacturing the mounting apparatus, and a sputtering target used in the manufacturing method.
- semiconductor elements such as LSIs are mounted on a mounting substrate in which a single-layer substrate having a wiring film formed on a resin substrate is laminated, and therefore a metal film having high adhesion is formed on the surface of the resin.
- the copper thin film has an advantage of low resistance, but since the adhesiveness with the resin is low, an adhesive layer made of another metal is formed between the resin and the copper thin film.
- Reference numeral 100 in FIG. 7 is such a conventional mounting apparatus, and a plurality of single-layer substrates 111 1 and 111 2 are laminated.
- Each single-layer substrate 111 1 , 111 2 of the mounting apparatus 100 has a base 103 made of resin, and a wiring film 110 is provided on the surface of the base 103.
- the base body 103 is provided with a connection hole 102, and a metal plug 119 for connecting the wiring films 110 of the laminated single-layer substrates 111 1 and 111 2 is provided inside the connection hole 102. .
- FIG. 5A shows a state in which the base 103 of the uppermost single-layer substrate 111 2 is stuck on the single-layer substrate 111 1 .
- the base 103 is provided with a connection hole 102, and the surface of the wiring film 110 of the lower single-layer substrate 111 1 is exposed at the bottom of the connection hole 102.
- a sputtering target containing an adhesion metal such as Ti is sputtered, and the wiring film 110 exposed on the surface of the substrate 103, the inner peripheral side surface of the connection hole 102, and the bottom surface is exposed. Then, an adhesion layer 118 such as a Ti thin film in contact with is formed, and then a copper sputtering target is sputtered to form a seed layer 115 made of a copper thin film on the surface of the adhesion layer 118.
- the patterned resist film is disposed on the surface of the seed layer 115 to expose the seed layer 115 inside the connection hole 102 and the seed layer 115 at a predetermined position on the surface of the base 103, and is immersed in a plating solution. Then, the exposed seed layer 115 is brought into contact with the plating solution, and a voltage at which the seed layer 115 has a negative potential with respect to the plating solution is applied between the seed layer 115 and the plating solution to be exposed by an electrolytic plating method. Copper is deposited on the surface of the seed layer 115, and copper thin films 106 and 107 are formed inside the connection hole 102 and on the surface of the substrate 103, as shown in FIG.
- connection hole 102 the copper thin films 106 and 107 are in contact with each other, and the inside of the connection hole 102 is filled with the copper thin film 106 made of copper, and the copper thin films 106 and 107 are formed thicker than the seed layer 115.
- Reference numeral 128 in FIG. 4C denotes a resist film.
- the adhesion layer 118 and the seed layer 115 have a portion located below the copper thin film 106 and a portion located below the resist film 128, and the resist film 128 is peeled off and below the resist film 128.
- the seed layer 115 located in the first step first, the seed layer 115 is immersed in an etching solution of copper, and as shown in FIG. The exposed seed layer 115 is removed by etching while leaving an adhesive layer, and the adhesion layer 118 is exposed in the removed portion.
- the exposed adhesion layer 118 is left while leaving the adhesion layers 108 positioned below the copper thin films 106 and 107 and the seed layer 105. Etching is removed to expose the substrate 103 in the removed portion.
- the adhesion layer 108, the seed layer 105, and the copper thin film 106 in the connection hole 102 constitute a metal plug 119 that fills the connection hole 102, and the adhesion layer 108, the seed layer 105 on the surface of the base 103, A wiring film 110 is constituted by the copper thin film 107.
- the adhesion between the copper thin films 106 and 107 and the resin exposed on the surface of the base 103 is low, and the copper thin films 106 and 107 are easily peeled off from the resin, but the adhesion layer 108 that is a Ti thin film is adhesive with the resin.
- the adhesion between the seed layer 105 and the copper thin film is high, the seed layer 105 and the copper thin films 106 and 107 are not peeled off from the substrate 103.
- the wiring film 110 has a three-layer structure.
- the manufacturing process increases.
- the adhesion layer 108 contains a large amount of elements such as Ti other than copper, the adhesion layer 118 and the seed layer 115 that is a copper thin film cannot be etched with the same etching solution, and the etching process is performed. It is complicated.
- the present invention was created to solve the disadvantages of the prior art described above, and an object of the present invention is to provide a technique capable of easily forming a conductive film that does not peel on a substrate from which a resin is exposed.
- the present invention has a base and a wiring film formed in a predetermined pattern in contact with at least the resin exposed on the surface of the base, and electrically connects an electronic component to the wiring film.
- the wiring film is mounted on the substrate, wherein the wiring film contains more than 50 atomic% of Cu, contains 5 atomic% or more and 30 atomic% or less of Ni, and contains 3 atomic% or more and 10 of Al.
- a mounting apparatus comprising: an alloy thin film that is contained in atomic percent or less and is in contact with the surface of the substrate; and a conductive conductive film that is in contact with the surface of the alloy thin film and contains more Cu than the alloy thin film. .
- the present invention is the mounting apparatus in which the substrate contains glass fiber, and the resin and the glass fiber are exposed on the surface of the substrate. Further, in the present invention, a connection hole penetrating between the front surface and the back surface is formed in the base body, and the resin and the glass fiber are exposed on an inner peripheral surface of the connection hole.
- the present invention is a method of manufacturing a mounting apparatus, which includes a base and a wiring film formed in a predetermined pattern, and manufactures a mounting apparatus that electrically connects an electronic component to the wiring film and mounts the electronic component on the base.
- the wiring film has at least an alloy thin film in contact with the resin exposed on the surface of the substrate, and a conductive thin film disposed in contact with the alloy thin film, and the wiring film is in a vacuum atmosphere.
- a substrate is disposed, a sputtering gas is introduced into the vacuum atmosphere, the substrate is disposed in the vacuum atmosphere, Cu is contained in an amount of more than 50 atomic%, Ni is contained in an amount of 5 atomic% to 30 atomic%, and Al is contained.
- a conductive film forming step of forming the conductive film larger than the alloy thin film includes immersing the base on which the alloy thin film is formed in a plating solution, applying a negative voltage to the plating solution to the alloy thin film, 5.
- the method of manufacturing a mounting device further comprising a growth step of growing the conductive film by attaching positive ions of a metal contained and containing copper to the surface of the alloy thin film.
- the present invention is to contact the alloy thin film formed in the alloy thin film forming step with one kind of etching solution, dissolve and remove the portion of the alloy thin film in contact with the etching solution, and remove the alloy thin film.
- the method for manufacturing a mounting apparatus further comprising an etching step of patterning the substrate.
- the present invention also includes an alloy composition containing more than 50 atomic percent of Cu, containing 5 atomic percent to 30 atomic percent of Ni, and containing 3 atomic percent to 10 atomic percent of Al, and is sputtered.
- the sputtering target forms an alloy thin film having the above alloy composition on the surface of the substrate where the resin is exposed.
- the alloy thin film is formed on the surface of the substrate and the conductive film having a high copper content is formed on the surface of the alloy thin film, the conductive film does not contact the resin, and the adhesion between the alloy thin film is high.
- the conductive film does not peel from the substrate. Since the alloy thin film can be etched by one kind of etching solution, a wiring film patterned by using one kind of etching solution can be formed by a single etching process on the separated copper film.
- the figure for demonstrating the mounting apparatus of this invention The figure for demonstrating the sputtering apparatus for forming a mounting apparatus (a) to (d): A diagram (1) for explaining the manufacturing process of the mounting apparatus of the present invention. (e) to (g): A diagram (2) for explaining the manufacturing process of the mounting apparatus of the present invention. (a)-(d): The figure for demonstrating the manufacturing process of the mounting apparatus of a prior art Diagram for explaining the substrate Figure showing a mounting device of the prior art Graph of measured values of adhesion
- Reference numeral 10 in FIG. 1 indicates a mounting apparatus of the present invention
- reference numeral 20 indicates a mother board to which the mounting apparatus 10 is electrically connected.
- the mounting apparatus 10 includes a support substrate 14 and first and second multilayer substrates 11 and 12 disposed on both surfaces of the support substrate 14, respectively. Each have a plurality of single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 .
- the one closer to the support substrate 14 is referred to as the lower layer, and the farther one is referred to as the upper layer, and each single-layer substrate 11 1 to 11 3 , 12 1 to the 12 3 one lower position, the other single-layer substrate 11 1, 11 2, 12 1, 12 2 or the supporting substrate 14 is positioned, in FIG. 4 (g), the first The uppermost single-layer substrate 11 3 of the multilayer substrate 11 and a part of the single-layer substrate 11 2 that is one layer below the single-layer substrate 11 3 are shown.
- the single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 have the same configuration, and the single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 are formed on the plate-like substrate 3 and the substrate 3.
- the connection hole 2 is a through hole formed in the base 3 and penetrating between the front surface and the back surface of the substrate 3.
- the support substrate 14 includes a resin substrate 14a made of resin, a plurality of support substrate through holes 14b formed in the resin substrate 14a, a connection body 14c filling the inside of each support substrate through hole 14b, and both surfaces of the resin substrate 14a. And a plurality of wiring films 14d.
- the connection body 14c has conductivity and is electrically connected to at least one wiring film 14d.
- the metal plugs 8 of the single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 are formed on the surface where the wiring film 9 is provided on the wiring film 9 of the base 3 having the connection hole 2 where the metal plug 8 is located. Electrically connected.
- the connection holes 2 of the single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 are connected to the wiring film 9 of the lower-layer single-layer substrates 11 1 , 11 2 , 12 1 , and 12 2 or the wiring of the support substrate 14.
- the metal plugs 8 of the single-layer substrates 11 1 to 11 3 and 12 1 to 12 3 are located on the film 14d, and the wiring films 9 of the lower-layer single-layer substrates 11 1 , 11 2 , 12 1 , and 12 2 are provided. Alternatively, it is electrically connected to the wiring film 14 d of the support substrate 14.
- the wiring films 9 of the uppermost single-layer substrates 11 3 and 12 3 of the first and second multilayer substrates 11 and 12 are the wiring film 14d on one side of the support substrate 14 and the wiring film 14d on the other side. And the wiring films 14d on both sides of the support substrate 14 are connected via the connecting body 14c, so that the uppermost single-layer substrates 11 3 , 12 are connected to each other. during the third wiring layer 9 and the wiring film 9 also by the connecting member 14c to the metal plugs 8 are electrically connected to each other.
- the motherboard 20 has a motherboard body 20a and a wiring film 20b disposed on the motherboard body 20a.
- a terminal 13 b of the semiconductor device 13 is fixed to the wiring film 9 of the uppermost single-layer substrate 11 3 of the first multilayer substrate 11, and the uppermost single-layer substrate 12 3 of the second multilayer substrate 12 is fixed.
- the wiring film 9 is electrically connected to the wiring film 20 b of the mother board 20 through the metal body 24.
- the terminal 13b of the semiconductor device 13 is electrically connected to an integrated circuit of a semiconductor element disposed inside the semiconductor device main body 13a. Therefore, the integrated circuit is connected via the mounting device 10 and the metal body 24.
- the wiring film 20b of the mother board 20 is electrically connected.
- each monolayer substrate 11 1 to 11 3, 12 1 to 12 3 of the base body 3 is comprised with the board
- the substrate 3 in FIG. 6 includes a glass fiber 26 in the resin 25, and the surface of the substrate 3 and the inner peripheral surface of the connection hole 2 are constituted by the surface of the resin 25 and the surface of the glass fiber 26. The resin 25 and the glass fiber 26 are exposed.
- the metal plug 8 has an alloy thin film 4 disposed in contact with the inner peripheral surface of the connection hole 2 and a conductive film 6 disposed in contact with the surface of the alloy thin film 4. Further, the wiring film 9 includes an alloy thin film 5 disposed in contact with the surface of the base 3 and a conductive film 7 disposed in contact with the surface of the alloy thin film 5.
- the alloy thin films 4 and 5 are in contact with at least the resin constituting the substrate 3 on the surface of the substrate 3 or the inner peripheral surface of the connection hole 2, and constitute the substrate 3 when the substrate 3 contains glass fibers. Contact resin and glass fiber.
- the second multilayer substrate 12 has already been formed on one side of the support substrate 14, and the single-layer substrates 11 1 and 11 2 other than the single-layer substrate 11 3 that is the uppermost layer are formed on the opposite side. Assume that they are formed and arranged.
- FIGS. 3 (a) shows the widget substrate 31 in this state, the surface single layer substrate 11 2 of the top layer is exposed in this widget substrate 31.
- the single-layer substrate 11 2 on the surface as shown in FIG. (B), attaching a substrate 3.
- the substrate 3 to be bonded may have the connection hole 2 formed before the substrate is bonded, or the connection hole 2 may be formed after the substrate 3 is bonded.
- connection hole 2 of the base 3 is exposed wiring film 9 of one underlying monolayer substrate 11 2, then the surface of the substrate 3 Alloy thin films 4 and 5 are formed on the inner peripheral side surface and the bottom surface of the connection hole 2.
- FIG. 2 shows a sputtering apparatus 50 for forming the alloy thin films 4 and 5.
- the sputtering apparatus 50 includes a carry-in / out chamber 51a, a pretreatment chamber 51b, and a film formation chamber 51c.
- the chambers 51a to 51c are connected to evacuation devices 58a to 58c, respectively.
- the gate valves 59a and 59b between the chambers 51a to 51c are closed, and the evacuation devices 58b and 58c are operated to perform preprocessing.
- the inside of the chamber 51b and the inside of the film forming chamber 51c are evacuated, and a vacuum atmosphere is formed in each of the inside of the pretreatment chamber 51b and the inside of the film forming chamber 51c.
- a transfer device 54 is arranged inside the carry-in / out chamber 51 a, and the work-in-process substrate 32 from which the base 3 is exposed is carried into the carry-in / out chamber 51 a and attached to the transfer device 54.
- the door of the carry-in / out chamber 51a is closed, the internal atmosphere is shut off from the atmosphere, the vacuum exhaust device 58a is operated, and the inside of the carry-in / out chamber 51a is evacuated.
- a heating device 56 is disposed inside the carry-in / out chamber 51a, and the in-process substrate 32 disposed in the transport device 54 is heated by the heating device 56 while being evacuated. After the in-process substrate 32 is heated to a predetermined temperature, the gate valve 59a is opened, and the in-process substrate 32 is moved together with the transfer device 54 from the inside of the loading / unloading chamber 51a to the inside of the pretreatment chamber 51b.
- An ion gun 57 is arranged inside the pretreatment chamber 51b. After the gate valve 59a between the carry-in / out chamber 51a and the pretreatment chamber 51b is closed, a rare gas (in this case) is supplied from the gas introduction system to the ion gun 57. When Ar) is supplied, rare gas ions are generated inside the ion gun 57. The generated rare gas ions are released into the pretreatment chamber 51b.
- a rare gas in this case
- the substrate 3 of the work-in-process substrate 32 is exposed in the vacuum atmosphere of the pretreatment chamber 51b.
- the substrate 3 is directed to the ion gun 57 and releases rare gas ions.
- Rare gas ions are irradiated to the surface of the base body 3, and the inner peripheral surface of the connection hole 2, on the surface of the underlying single-layer substrate 11 second conductive film 7 exposed on the bottom of the connection hole 2, the irradiated portion Is cleaned and becomes active.
- the gate valve 59b between the film formation chamber 51c is opened, and the in-process substrate 32 on which the pretreatment has been performed is brought together with the transfer device 54 into the pretreatment chamber. It moves from the inside of 51b to the inside of the film forming chamber 51c, and the gate valve 59b is closed.
- a target 55 is disposed inside the film forming chamber 51c.
- This target 55 is a target containing more than 50 atomic% of Cu, containing 5 atomic% or more and 30 atomic% or less of Ni, and containing 3 atomic% or more and 10 atomic% or less of Al.
- a gas discharge device 53 is provided inside the film formation chamber 51c, and the inside of the film formation chamber 51c is continuously evacuated by the vacuum exhaust device 58c, while maintaining a vacuum atmosphere, from the gas supply device 52.
- a sputtering gas (a rare gas such as argon gas) is supplied to the gas release device 53, the sputtering gas is released from the gas release device 53 into the film formation chamber 51c, a voltage is applied to the target 55, and a sputtering gas plasma is generated. Generate.
- the surface of the pretreated substrate 3 faces the target 55, and when the target 55 is sputtered by the generated plasma, the sputtered particles adhere to the pretreated surface of the substrate 3, An alloy thin film in which the contents of Cu, Ni, and Al are the same as that of the target 55 grows.
- Reference numeral 33 in FIG. 3C is a work-in-process substrate in which the alloy thin film 15 is formed to a predetermined thickness.
- the alloy thin film 15 has a Cu, Ni, and Al content of more than 50 atomic%, respectively.
- the content ratio is 5 atomic% or more and 30 atomic% or less, 3 atomic% or more and 10 atomic% or less, that is, the alloy thin film 15 is a thin film having the same composition as the target 55.
- the alloy thin film 15 is in contact with the surface of the base 3 (excluding the inner peripheral surface of the connection hole 2), the inner peripheral surface of the connection hole 2, and the conductive film 7 on the bottom surface of the connection hole 2. in 2 of the bottom, in contact with the wiring film 9 of a single-layer substrate 11 and second one lower, it is electrically connected.
- One underlying monolayer substrate 11 and second wiring layer 9 is composed of an alloy thin film 5 and the conductive film 7.
- the adhesion strength is higher than that in the case where the irradiation is not performed.
- the gate valves 59a and 59b are opened, and the work-in-process substrate 33 on which the alloy thin film 15 is formed passes through the pretreatment chamber 51b and is moved to the carry-in / out chamber 51a in which the inside is in a vacuum atmosphere.
- the gate valves 59a and 59b are closed, gas is introduced into the loading / unloading chamber 51a, and the inside of the loading / unloading chamber 51a becomes atmospheric pressure, and then the work substrate 33 on which the alloy thin film 15 is formed is taken out from the loading / unloading chamber 51a.
- a patterned resist film 28 is disposed on the surface of the alloy thin film 15.
- openings 29 are formed above the connection holes 2 of the uppermost substrate 3 and above a predetermined position of the alloy thin film 15 on the surface of the substrate 3.
- the alloy thin film 15 disposed on the bottom surface and the inner peripheral side surface of each connection hole 2 or the alloy thin film 15 located on the surface of the substrate 3 is exposed.
- a conductive film made of a material having a Cu content (atomic%) higher than that of the alloy thin film 15 and a low resistivity is formed. 15 is formed in contact with.
- the work substrate 33 in which the alloy thin film 15 is exposed on the bottom surface of the opening 29 of the resist film 28 and on a predetermined position on the surface of the base 3 is plated with copper ions.
- the exposed alloy thin film 15 is immersed in the solution and brought into contact with the plating solution, the copper electrode immersed in the plating solution and the alloy thin film 15 are connected to a power source, the power source is operated, and the alloy thin film is passed through the copper electrode.
- a voltage is applied between 15 and the plating solution to attach positive metal ions in the plating solution to the portion of the alloy thin film 15 that contacts the plating solution, and a conductive film containing more copper than the alloy thin film 15 is grown.
- the electrolytic plating method has a higher growth rate than the sputtering method, and the films of the conductive films 6 and 7 formed by the electrolytic plating method rather than the film thickness of the alloy thin film 15 formed by the sputtering method.
- the conductive film 6 formed on the surface of the alloy thin film 15 in the connection hole 2 fills the inside of the connection hole 2, and its upper portion is on the surface of the base 3. It is located above the surface of the alloy thin film 15.
- the alloy thin film 15 is exposed between the portions where the conductive films 6 and 7 are exposed.
- the conductive film 6 inside the connection hole 2 is connected to the conductive film 7 on the surface of the base 3.
- the conductive film 7 on the surface of the base 3 has conductive films separated from each other, the resist In the state where the film 28 is peeled off, the conductive films 6 and 7 are electrically connected to each other by the alloy thin film 15.
- connection hole 2 is between the conductive film 6 inside the connection hole 2 and the conductive film 6 and the inner peripheral surface of the connection hole 2.
- a metal plug 8 is constituted by the alloy thin film 4 located in the region, and a wiring film 9 is constituted by the conductive film 7 and the alloy thin film 5 located under the conductive film 7 on the substrate 3. Yes.
- the space surrounded by the alloy thin film 4 formed on the inner peripheral surface of the connection hole 2 is filled with the conductive film 64, and thus the connection hole 2 is filled with the metal plug 8.
- the adhesion of the pure copper thin film is poor with respect to the resin exposed on the surface of the substrate 3.
- the alloy thin films 4 and 5 in contact with the resin were measured for adhesion by containing an element other than Cu in a thin film material containing more than 50 atomic% of Cu, as shown in the following experiment.
- the thin film material containing 5 atomic% to 30 atomic% of Ni and containing 3 atomic% to 10 atomic% of Al is more adhesive to the resin than the thin film of pure copper or copper oxide. Higher than.
- the adhesion was not improved even if Mg was added to the copper thin film, and the adhesion was not improved even if oxygen was added to the copper thin film.
- the film 9 has improved adhesion between the alloy thin films 4 and 5 and the resin.
- the copper content of the alloy thin films 4 and 5 is larger than 50 atomic%, the adhesiveness with the pure copper thin film is high, the metal plug 8 and the wiring film 9 do not peel from the base 3, and the conductive film 6 and 7 have a higher copper content than the alloy thin films 4 and 5, so that the conductive films 6 and 7 do not peel from the alloy thin films 4 and 5.
- An alloy thin film having a different composition is formed on the surface of the base 3 made of an epoxy resin containing glass fiber by sputtering, with Ni pellets and Al pellets placed on a copper target.
- a conductive film made of pure copper was formed on the surface by electrolytic plating, and the adhesion of the wiring film composed of the alloy thin film and the conductive film was measured.
- the composition of the alloy thin film includes impurities and copper inevitably contained in addition to Ni and Al, and the content of impurities is small. In this alloy thin film, other than Ni and Al are composed of copper. It can be said that.
- the film thickness of the alloy thin film was 500 nm, and the film thickness of the conductive film was 30 ⁇ m.
- the adhesion is obtained by cutting out a part of the substrate 3 on which a wiring film composed of an alloy thin film and a conductive film is formed, holding the end of the wiring film peeled off from the substrate 3 at the cut-out portion, and at a constant speed (20 mm / min). ) To measure the force when lifted upward and peeled off. Assuming that this force is the adhesion force, the following Table 1 shows the measurement results of the adhesion force of the alloy thin film having the experimental composition, and the column “Measured Value” in Table 1 shows the unit per unit width (cm) of the alloy thin film. Value.
- the adhesion force was 800 gf / cm.
- FIG. 8 is a graph of the measurement results in Table 1, and the composition indicated by the dots in the positions above the dotted line is included in the present invention.
- the adhesion force of a wiring film containing 2 atomic% of Mg, 8 atomic% of Al, and the remainder including Cu was measured and found to be 320 gf / cm. From this, it can be seen that the improvement in adhesion is small in the alloy film added with Al and Mg as compared with the alloy film added with Al and Ni.
- the substrate 3 is a hard substrate made of an epoxy resin containing glass fibers, but may be a resin other than an epoxy resin. Moreover, the base
- the substrate 3 may be a flexible film made of a soft resin.
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Abstract
Description
この搭載装置100の各単層基板1111、1112は、樹脂から成る基体103を有しており、基体103の表面には配線膜110が設けられている。また、基体103には接続孔102が設けられており、接続孔102の内部には、積層された単層基板1111、1112の配線膜110同士を接続する金属プラグ119が設けられている。
また、本発明は、前記基体はガラス繊維を含有し、前記基体の表面には、前記樹脂と前記ガラス繊維とが露出された搭載装置である。
また、本発明は、前記基体には表面と裏面との間を貫通する接続孔が形成され、前記接続孔の内周面には、前記樹脂と前記ガラス繊維とが露出され、前記接続孔の内周面には、前記合金薄膜が接触され、前記接続孔の内周面に位置する前記合金薄膜で囲まれた部分には、前記合金薄膜と接触して前記導電膜が充填された搭載装置である。
本発明は、基体と、所定パターンに形成された配線膜とを有し、電子部品を前記配線膜に電気的に接続させて前記基体上に搭載させる搭載装置を製造する搭載装置の製造方法であって、前記配線膜は、少なくとも前記基体の表面に露出した樹脂に接触する合金薄膜と、前記合金薄膜と接触して配置された導導電性の電薄膜とを有し、真空雰囲気中に前記基体を配置し、前記真空雰囲気中にスパッタリングガスを導入し、前記真空雰囲気中に配置され、Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有するスパッタリングターゲットをスパッタリングして、前記基体の表面に、前記ターゲットと同じ組成の前記合金薄膜を形成する合金薄膜形成工程と、前記合金薄膜の表面に、Cuの体積含有率が前記合金薄膜よりも多い前記導電膜を形成する導電膜形成工程と、を有する搭載装置の製造方法である。
また、本発明は、前記導電膜形成工程は、前記合金薄膜が形成された前記基体をメッキ液に浸漬し、前記合金薄膜に、前記メッキ液に対して負電圧を印加し、前記メッキ液に含有され、銅を含む金属の正イオンを前記合金薄膜の表面に付着させて前記導電膜を成長させる成長工程を有する請求項4記載の搭載装置の製造方法である。
また、本発明は、前記合金薄膜形成工程で形成された前記合金薄膜を一種類のエッチング液に接触させ、前記エッチング液に接触された部分の前記合金薄膜を溶解させて除去し、前記合金薄膜をパターニングするエッチング工程を有する請求項5記載の搭載装置の製造方法である。
また、本発明は、Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有する合金組成を有し、スパッタリングされて、樹脂が露出する基体の表面に、前記合金組成の合金薄膜を形成するスパッタリングターゲットである。
一種類のエッチング液によって合金薄膜をエッチングできるので、分離配置された銅膜を一回のエッチング工程により、一種類のエッチング液を用いてパターニングされた配線膜を形成することができる。
この搭載装置10は、支持基板14と、支持基板14の両面にそれぞれ配置された第一、第二の多層基板11、12とを有しており、第一、第二の多層基板11、12は、それぞれ複数の単層基板111~113、121~123を有している。
そして、各単層基板111~113、121~123の接続孔2は、下層の単層基板111、112、121、122の配線膜9又は、支持基板14の配線膜14d上に位置しており、各単層基板111~113、121~123の金属プラグ8は、下層の単層基板111、112、121、122の配線膜9又は、支持基板14の配線膜14dに電気的に接続されている。
第一の多層基板11の最上層の単層基板113の配線膜9には、半導体装置13の端子13bが固定されており、第二の多層基板12の最上層の単層基板123の配線膜9は、金属体24を介して、マザーボード20の配線膜20bに電気的に接続されている。
先ず、その単層基板112の表面上に、同図(b)に示すように、基体3を貼付する。
貼付する基体3は、貼付する前に接続孔2が形成されていてもよいし、基体3を貼付した後、接続孔2を形成してもよい。
このスパッタリング装置50は、搬出入室51aと、前処理室51bと、成膜室51cとを有している。
各室51a~51cには、それぞれ真空排気装置58a~58cが接続されており、各室51a~51cの間のゲートバルブ59a、59bを閉じ、真空排気装置58b、58cを動作させて、前処理室51bの内部と、成膜室51cの内部とを真空排気し、前処理室51bの内部と成膜室51cの内部とに、それぞれ真空雰囲気を形成しておく。
搬出入室51aの扉を閉じ、内部雰囲気を大気から遮断して真空排気装置58aを動作させ、搬出入室51aの内部を真空排気する。
仕掛基板32が所定温度に昇温された後、ゲートバルブ59aが開けられ、仕掛基板32は、搬送装置54と一緒に搬出入室51aの内部から前処理室51bの内部に移動される。
このターゲット55は、Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有するターゲットである。
合金薄膜15が所定膜厚に形成された後、ターゲット55への電圧印加とスパッタリングガス導入が停止され、スパッタリングは終了する。
ゲートバルブ59a、59bが閉じられた後、搬出入室51aに気体が導入され、搬出入室51aの内部が大気圧になった後、合金薄膜15が形成された仕掛基板33は搬出入室51aから取り出される。
このレジスト膜28には、最上層の基体3の各接続孔2の上方と、その基体3の表面上の合金薄膜15の所定位置の上方とに、開口29が形成されており、開口29の底面下には、各接続孔2の底面と内周側面に配置された合金薄膜15、又は、基体3の表面上に位置する合金薄膜15が露出されている。
接続孔2の内部の導電膜6は、基体3の表面上の導電膜7に接続されているが、基体3の表面上の導電膜7には、互いに分離された導電膜があるものの、レジスト膜28を剥離した状態では、各導電膜6、7は、合金薄膜15によって、互いに電気的に接続された状態である。
本願発明では、樹脂と接触する合金薄膜4、5は、Cuを50原子%よりも多く含有する薄膜材料に、下記実験に示すように、Cu以外の元素を含有させて密着力を測定したところ、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有する薄膜材料が、純銅や酸化銅の薄膜よりも、樹脂に対する密着性は、銅薄膜の密着性よりも高くなっている。
表1の測定結果から、剥離強度の値が800以上になるためには、Niは5原子%以上30原子%以下、Alは3原子%以上10原子%以下が必要なことが分かる。
なお、比較対象として、Mgを2原子%含有し、Alを8原子%含有し、残りはCuから成る配線膜の密着力を測定したところ、320gf/cmであった。このことから、AlとNiを添加した合金膜と比べ、AlとMgを添加した合金膜では密着力の向上は小さいことが分かる。
3……基体
4、5……合金薄膜
6、7……導電膜
8……金属プラグ
9……配線膜
10……搭載装置
55……ターゲット
Claims (7)
- 基体と、
少なくとも前記基体の表面に露出した樹脂に接触し、所定パターンに形成された配線膜とを有し、電子部品を前記配線膜に電気的に接続させて前記基体上に搭載させる搭載装置であって、
前記配線膜は、
Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有し、前記基体の表面と接触された合金薄膜と、
前記合金薄膜の表面と接触し、Cuを前記合金薄膜よりも多く含有する導電性の導電膜と、
を有する搭載装置。 - 前記基体はガラス繊維を含有し、
前記基体の表面には、前記樹脂と前記ガラス繊維とが露出された請求項1記載の搭載装置。 - 前記基体には表面と裏面との間を貫通する接続孔が形成され、前記接続孔の内周面には、前記樹脂と前記ガラス繊維とが露出され、
前記接続孔の内周面には、前記合金薄膜が接触され、
前記接続孔の内周面に位置する前記合金薄膜で囲まれた部分には、前記合金薄膜と接触して前記導電膜が充填された請求項1記載の搭載装置。 - 基体と、
所定パターンに形成された配線膜とを有し、電子部品を前記配線膜に電気的に接続させて前記基体上に搭載させる搭載装置を製造する搭載装置の製造方法であって、
前記配線膜は、少なくとも前記基体の表面に露出した樹脂に接触する合金薄膜と、
前記合金薄膜と接触して配置された導導電性の電薄膜とを有し、
真空雰囲気中に前記基体を配置し、前記真空雰囲気中にスパッタリングガスを導入し、前記真空雰囲気中に配置され、Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有するスパッタリングターゲットをスパッタリングして、前記基体の表面に、前記ターゲットと同じ組成の前記合金薄膜を形成する合金薄膜形成工程と、
前記合金薄膜の表面に、Cuの体積含有率が前記合金薄膜よりも多い前記導電膜を形成する導電膜形成工程と、
を有する搭載装置の製造方法。 - 前記導電膜形成工程は、前記合金薄膜が形成された前記基体をメッキ液に浸漬し、前記合金薄膜に、前記メッキ液に対して負電圧を印加し、前記メッキ液に含有され、銅を含む金属の正イオンを前記合金薄膜の表面に付着させて前記導電膜を成長させる成長工程を有する請求項4記載の搭載装置の製造方法。
- 前記合金薄膜形成工程で形成された前記合金薄膜を一種類のエッチング液に接触させ、前記エッチング液に接触された部分の前記合金薄膜を溶解させて除去し、前記合金薄膜をパターニングするエッチング工程を有する請求項5記載の搭載装置の製造方法。
- Cuを50原子%よりも多く含有し、Niを5原子%以上30原子%以下含有し、Alを3原子%以上10原子%以下含有する合金組成を有し、スパッタリングされて、樹脂が露出する基体の表面に、前記合金組成の合金薄膜を形成するスパッタリングターゲット。
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WO2018189965A1 (ja) * | 2017-04-13 | 2018-10-18 | 株式会社アルバック | 液晶表示装置、有機el表示装置、半導体素子、配線膜、配線基板、ターゲット |
WO2022244095A1 (ja) * | 2021-05-18 | 2022-11-24 | キヤノンアネルバ株式会社 | 積層体及び積層体の製造方法 |
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US20150230343A1 (en) | 2015-08-13 |
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CN104685977A (zh) | 2015-06-03 |
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US9363900B2 (en) | 2016-06-07 |
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