WO2014073665A1 - 気密封止用蓋材および電子部品収納用パッケージ - Google Patents
気密封止用蓋材および電子部品収納用パッケージ Download PDFInfo
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- WO2014073665A1 WO2014073665A1 PCT/JP2013/080321 JP2013080321W WO2014073665A1 WO 2014073665 A1 WO2014073665 A1 WO 2014073665A1 JP 2013080321 W JP2013080321 W JP 2013080321W WO 2014073665 A1 WO2014073665 A1 WO 2014073665A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/02—Wrappers or flexible covers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0032—Packages or encapsulation
- B81B7/0077—Other packages not provided for in groups B81B7/0035 - B81B7/0074
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/02—Internal fittings
- B65D25/10—Devices to locate articles in containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/02—Containers; Seals
- H01L23/04—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls
- H01L23/053—Containers; Seals characterised by the shape of the container or parts, e.g. caps, walls the container being a hollow construction and having an insulating or insulated base as a mounting for the semiconductor body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/02007—Details of bulk acoustic wave devices
- H03H9/02086—Means for compensation or elimination of undesirable effects
- H03H9/02149—Means for compensation or elimination of undesirable effects of ageing changes of characteristics, e.g. electro-acousto-migration
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1007—Mounting in enclosures for bulk acoustic wave [BAW] devices
- H03H9/1014—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device
- H03H9/1021—Mounting in enclosures for bulk acoustic wave [BAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the BAW device the BAW device being of the cantilever type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12896—Ag-base component
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12903—Cu-base component
- Y10T428/1291—Next to Co-, Cu-, or Ni-base component
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12931—Co-, Fe-, or Ni-base components, alternative to each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12944—Ni-base component
Definitions
- the present invention relates to a hermetically sealing lid and an electronic component storage package using the same.
- Japanese Patent Application Laid-Open No. 2012-74807 discloses a package main body (electronic component) including a piezoelectric vibration element, an insulating substrate having a recess in which the piezoelectric vibration element is accommodated, and a seal ring made of Kovar disposed on the upper periphery of the insulating substrate.
- a piezoelectric vibrator including a housing member) and a lid member (sealing material for airtight sealing) that is seam welded to a seal ring is disclosed.
- the lid member of the piezoelectric vibrator is made of a Kovar material (29Ni-16Co-Fe alloy) plated with Ni.
- the lid member when the lid member is manufactured, in order to form the Ni plating layer on the entire surface of the Kovar material, the Kovar material is pressed to a predetermined size, and then the surface of the Kovar material is Ni-plated. It is common to manufacture by.
- As a method for forming Ni plating on the surface of the Kovar material there are electroless Ni plating treatment and electrolytic Ni plating treatment.
- the Ni plating thickness tends to vary as the current density during plating is increased to increase the plating speed.
- the electroless Ni plating process when the lid member and the seal ring are welded, there is a disadvantage that sufficient hermetic sealing may not be performed due to variations in the thickness of the Ni plating.
- the surface of the Kovar material may be exposed.
- the Kovar material is corroded from the portion not covered with the Ni plating, there is also a problem that the corrosion resistance of the lid member is lowered.
- the present invention has been made to solve the above-described problems, and one object of the present invention is to increase the time (takt time) required to manufacture one hermetic sealing lid.
- An object of the present invention is to provide a hermetic sealing lid member capable of preventing the corrosion resistance from being lowered while suppressing this, and an electronic component storage package using the same.
- An airtight sealing lid material is an airtight sealing lid material used for an electronic component storage package including an electronic component storage member for storing an electronic component, and includes Ni and Cr.
- the lid for hermetic sealing according to the first aspect of the present invention includes a base material layer made of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy, and a base material layer. It is necessary to perform a Ni plating treatment on the surface of the base material layer by forming a clad material that is at least bonded to one surface on the electronic component storage member side and includes a surface layer made of Ni or Ni alloy. There is no. Thereby, compared with the case where Ni plating process is performed, it can suppress that time (takt time) required in order to manufacture one airtight sealing cover material becomes long.
- the base layer is made of Ni—Cr—Fe alloy or Ni—Cr—Co—Fe alloy, so that it is mainly made of Cr 2 O 3. Since the passive film is formed on the surface of the base material layer, the corrosion resistance of the base material layer can be improved as compared with the case where the base material layer is made of Kovar (29Ni-16Co—Fe alloy). Thereby, since it can suppress that a base material layer corrodes from the part which is not covered with the surface layer comprised by Ni or Ni alloy, the corrosion resistance of the cover material for airtight sealing becomes low. Can be suppressed.
- the base material layer is a Ni—Cr—Fe alloy containing 1% by mass or more and 10% by mass or less of Cr, or Ni—Cr—Co—. It is composed of an Fe alloy. According to this structure, by setting the content of Cr in the base material layer at least 1 wt%, mainly because Cr 2 O 3 Ranaru passivation film is reliably formed on the surface of the substrate layer Further, the corrosion resistance of the base material layer can be further improved.
- the electronic component storage member comprised with ceramics, It is possible to suppress an increase in the difference in thermal expansion from the lid for hermetic sealing. As a result, the thermal stress generated between the hermetic sealing lid member and the electronic component storage member can be reduced, thereby preventing the electronic component storage package from being damaged due to the thermal stress. it can.
- the base material layer is preferably made of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy containing 6 mass% or more and 10 mass% or less of Cr. According to this structure, mainly because passivation film made of Cr 2 O 3 is reliably formed by the upper surface of the base layer, we are possible to further improve the corrosion resistance of the base layer.
- the base material layer is made of a Ni—Cr—Co—Fe alloy containing 6 mass% or more and 18 mass% or less of Co. If comprised in this way, it can suppress that the thermal expansion coefficient of a base material layer becomes large by making the content rate of Co of a base material layer into 6 mass% or more and 18 mass% or less. It is possible to suppress an increase in the difference in thermal expansion between the electronic component housing member constituted by the above and the hermetic sealing lid member. As a result, the thermal stress generated between the hermetic sealing lid member and the electronic component storage member can be reduced, thereby preventing the electronic component storage package from being damaged due to the thermal stress. it can.
- the surface layer is preferably made of a Ni—Cu alloy containing Ni and Cu. If constituted in this way, the melting point of the surface layer can be lowered compared with the case where the surface layer is made of Ni or compared to other Ni alloys. The temperature at the time of joining the electronic component housing member can be lowered. Thereby, the thermal stress which generate
- the surface layer is preferably made of a Ni—Cu alloy containing 30% by mass or more of Ni. If comprised in this way, since Ni excellent in corrosion resistance is fully contained in a surface layer, the corrosion resistance of a surface layer can fully be ensured.
- the surface layer is made of a Ni—Cu alloy containing 60% by mass or more of Ni. If comprised in this way, since Ni is further sufficiently contained in the surface layer, not only corrosion resistance but also oxidation resistance can be effectively improved in the surface layer. Thereby, even if it is a case where heat processing is performed in air
- the surface layer has a thickness of 1 ⁇ m or more and 10 ⁇ m or less. If comprised in this way, when using a surface layer as a joining layer for welding with respect to an electronic component storage member, since the thickness of the surface layer required for joining can be fully ensured, an electronic component It is possible to prevent the hermetic sealing of the storage package from becoming difficult. Further, by making the thickness of the surface layer 10 ⁇ m or less, it is possible to suppress an increase in the proportion of the surface layer that does not contribute to bonding when the surface layer is used as a bonding layer for welding to the electronic component housing member. be able to.
- the surface layer preferably has a thickness of 2 ⁇ m or more and 6 ⁇ m or less. If comprised in this way, while it becomes possible to suppress that the airtight sealing of the electronic component storage package becomes difficult, the ratio of the surface layer which does not contribute to joining can be made small enough.
- the surface layer includes a first surface layer bonded to one surface of the base material layer on the electronic component housing member side, and an electronic component of the base material layer.
- a second surface layer bonded on the other surface opposite to the storage member.
- the second surface layer is preferably made of the same metal material as the first surface layer. If comprised in this way, since the 1st surface layer and 2nd surface layer which were comprised by the same metal material are each arrange
- the cladding material preferably includes a silver brazing layer bonded at least to the surface of the first surface layer on the electronic component housing member side.
- the base material layer is preferably made of 36 mass% to 48 mass% Ni and 1 mass% to 10 mass% Cr. And a Ni—Cr—Fe alloy containing Fe, and the first surface layer and the second surface layer are both Ni—Cu alloys containing 30% by mass or more of Ni, or Ni. It is configured. If comprised in this way, the content rate of Cr of a base material layer shall be 1 mass% or more, and while ensuring the corrosion resistance of the airtight sealing cover material, one airtight sealing cover material is manufactured. It is possible to reliably suppress an increase in time (takt time) required for the operation.
- the base material layer is a Ni—Cr—Fe alloy
- the base material layer comprises 36% by mass or more and 48% by mass or less of Ni, 6% by mass or more and 10% by mass or less of Cr, and Fe.
- Both of the first surface layer and the second surface layer are made of a Ni—Cu alloy containing 30 mass% or more of Ni. If comprised in this way, by making the content rate of Cr of a base material layer 6 mass% or more, it is more reliable that the tact time becomes long while ensuring the corrosion resistance of the airtight sealing lid material more reliably. Can be suppressed.
- the surface layer is made of a Ni—Cu alloy, the melting point of the surface layer can be lowered as compared with the case where the surface layer is made of Ni.
- the temperature at the time of joining with an electronic component storage member can be reduced. Thereby, the thermal stress which generate
- the base material layer contains 6% by mass or more and 18% by mass or less Co
- the base material layer is 1% by mass or more and 10% by mass or less Cr and 6% by mass or more and 18% by mass or less. It is made of a Ni—Cr—Co—Fe alloy containing Co and Fe. If comprised in this way, the content rate of Cr of a base material layer shall be 1 mass% or more, and while ensuring the corrosion resistance of the airtight sealing cover material, one airtight sealing cover material is manufactured. It is possible to reliably suppress an increase in time (takt time) required for the operation.
- the thermal expansion coefficient of a base material layer becomes large by making content rate of Co of a base material layer into 6 mass% or more and 18 mass% or less, for example, the electron comprised by ceramics
- An increase in the difference in thermal expansion between the component housing member and the hermetic sealing lid material can be suppressed.
- the thermal stress generated between the hermetic sealing lid member and the electronic component storage member can be reduced, thereby preventing the electronic component storage package from being damaged due to the thermal stress. it can.
- the surface layer bonded to the one surface of the base material layer on the electronic component housing member side is resistance-welded to the electronic component housing member.
- it is configured to function as a bonding layer that melts. If comprised in this way, the lid
- An electronic component storage package includes an electronic component storage member for storing an electronic component, and an airtight sealing lid according to the first aspect that is resistance-welded to the electronic component storage member. Material.
- An electronic component storage package is a base material for a lid for hermetic sealing according to the first aspect, from a portion not covered with a surface layer made of Ni or Ni alloy. Since the corrosion of the layer can be suppressed, it is possible to suppress the corrosion resistance of the hermetic sealing lid material from being lowered.
- the surface layer bonded to one surface of the base material layer on the electronic component storage member side is resistance-welded to the electronic component storage member. It functions as a bonding layer that melts. If comprised in this way, the lid
- the corrosion resistance of the hermetic sealing lid material is low while suppressing an increase in the time (tact time) required for manufacturing one hermetic sealing lid material. It can be suppressed.
- FIG. 4 is a cross-sectional view taken along line 400-400 in FIG. It is the perspective view which showed the structure of the electronic component storage package by one Embodiment of this invention.
- FIG. 5 is a sectional view taken along line 500-500 in FIG. It is the perspective view which showed the structure of the electronic component storage member by one Embodiment of this invention. It is a perspective view for demonstrating the manufacturing process of the electronic component storage package by one Embodiment of this invention. It is the table
- the lid 1 for hermetic sealing is used in an electronic component storage package 100 including an electronic component storage member 30 for storing a crystal resonator 20 described later. Further, as shown in FIG. 1, the hermetic lid 1 has a length L1 of about 2.3 mm in the longitudinal direction (X direction) and a length L2 of about 1.8 mm in the short direction (Y direction). And a thickness t1 of about 80 ⁇ m in the thickness direction (Z direction).
- the lid 1 for hermetic sealing is pressure-bonded to the base material layer 10 and the lower surface 10a (Z2 side surface) and the upper surface 10b (Z1 side surface) of the base material layer 10, respectively. It consists of a three-layer clad material composed of the surface layers 11 and 12 formed.
- the surface layers 11 and 12 are disposed on the lower surface 1a side and the upper surface 1b side of the hermetic sealing lid 1, respectively.
- the surface layer 11 disposed on the lower surface 1a side of the hermetic sealing lid 1 functions as a bonding layer that melts when being welded to the electronic component housing member 30 by seam welding, which is a type of resistance welding. To do.
- the surface layers 11 and 12 are examples of the “first surface layer” and the “second surface layer” of the present invention, respectively, and the lower surface 10 a and the upper surface 10 b are “one surface” and “ It is an example of “the other surface”.
- the base layer 10 is made of Ni—Cr—Fe alloy composed of Ni, Cr, Fe and inevitable impurities, or Ni—Cr—Co composed of Ni, Cr, Co, Fe and inevitable impurities.
- -It is composed of an Fe alloy.
- the Ni content of the Ni—Cr—Fe alloy or Ni—Cr—Co—Fe alloy constituting the base material layer 10 is preferably approximately 36% by mass or more and 48% by mass or less, and is approximately 42% by mass. It is more preferable that Further, the Cr content of the Ni—Cr—Fe alloy or Ni—Cr—Co—Fe alloy is preferably about 1% by mass to 10% by mass, and is about 4% by mass to 10% by mass. Is more preferable.
- the Cr content is approximately 6% by mass or more and 10% by mass or less.
- the Co content is preferably about 6% by mass to 18% by mass.
- the base material layer 10 contains approximately 36% by mass to 48% by mass Ni, 6% by mass to 10% by mass Cr, 6% by mass to 18% by mass Co, and Fe. More preferably, the Ni—Cr—Co—Fe alloy is used.
- the surface layers 11 and 12 are made of the same metal material, and are made of Ni—Cu alloy made of Ni, Cu and inevitable impurities, or Ni. From the viewpoint of lowering the melting point, the surface layers 11 and 12 are composed of a Ni—Cu alloy containing approximately 30% by mass or more of Ni and 70% by mass or less of Cu, or Ni. It is more preferable that it is made of a Ni—Cu alloy containing approximately 30% by mass or more of Ni and 70% by mass or less of Cu. Further, from the viewpoint of oxidation resistance, the surface layers 11 and 12 are composed of a Ni—Cu alloy containing approximately 45% by mass or more of Ni and 55% by mass or less of Cu, or Ni. Preferably, it is more preferably composed of Ni—Cu alloy containing Ni of 60% by mass or more and Cu of 40% by mass or less, or Ni.
- the lid 1 for hermetic sealing is approximately a Ni—Cr—Fe alloy or Ni—Cr containing 36% by mass to 48% by mass of Ni and 1% by mass to 10% by mass of Cr and Fe. 3 layers composed of a base material layer 10 composed of —Co—Fe alloy and a Ni—Cu alloy containing approximately 30% by mass or more of Ni, or surface layers 11 and 12 composed of Ni The clad material is preferably used.
- the lid 1 for hermetic sealing includes a Ni—Cr—Fe alloy or Ni—Cr containing approximately 36% to 48% by mass of Ni and 4% to 10% by mass of Cr and Fe.
- the lid 1 for hermetic sealing is composed of a Ni—Cr—Fe alloy containing approximately 36% to 48% by mass of Ni and 6% to 10% by mass of Cr and Fe. More preferably, it is made of a three-layer clad material composed of a base material layer 10 and surface layers 11 and 12 made of a Ni—Cu alloy containing approximately 30% by mass or more of Ni.
- At least a portion of the side surface of the hermetic sealing lid 1 where the base material layer 10 is exposed is mainly oxidized by Cr of the Ni—Cr—Fe alloy constituting the base material layer 10.
- a passive film made of Cr 2 O 3 is formed. Thereby, it is comprised so that the corrosion resistance of the base material layer 10 may improve.
- the base material layer 10 has a thickness t2 of approximately 74 ⁇ m
- the surface layer 11 has a thickness t3 of approximately 3 ⁇ m
- the surface layer 12 has a thickness t4 of approximately 3 ⁇ m.
- the thickness t3 of the surface layer 11 is preferably about 1 ⁇ m to 10 ⁇ m, and more preferably about 2 ⁇ m to 6 ⁇ m. Furthermore, the thickness t3 is preferably about 3 ⁇ m to 4 ⁇ m.
- the thickness t3 of the surface layer 11 and the thickness t4 of the surface layer 12 are preferably the same thickness.
- the electronic component storage package 100 is used for hermetic sealing in a state where the hermetic sealing lid 1 and the crystal resonator 20 (see FIG. 4) are stored. And an electronic component housing member 30 hermetically sealed by the lid member 1.
- the hermetic sealing lid member 1 stores the electronic component such that the surface layer 11 of the hermetic sealing lid member 1 is on the electronic component storage member 30 side (lower side, Z2 side). It is disposed on the member 30.
- the crystal unit 20 is an example of the “electronic component” in the present invention.
- the electronic component housing member 30 includes a box-shaped base 31 made of ceramic alumina (Al 2 O 3 ), a ring-shaped seal ring 32 brazed to the base 31, and a seal ring 32. And a protective plating layer 33 covering the.
- the base 31 includes a bottom portion 31a on the Z2 side, and a side portion 31b formed so as to extend upward (Z1 side) from the outer peripheral edge of the upper surface (surface on the Z1 side) of the bottom portion 31a.
- the electronic component housing member 30 is formed with a recess 31c so as to be surrounded by the bottom portion 31a and the side portion 31b. Further, the crystal unit 20 is housed in the recess 31 c in a state of being fixed to the recess 31 c by the bump 40.
- a metallized layer 31d is formed on the upper end of the side portion 31b.
- This metallized layer 31d is formed in order to improve the brazing joint between the ceramic (Al 2 O 3 ) constituting the base material 31 and the metal (Kovar) constituting the seal ring 32.
- the metallized layer 31d has a structure in which a W layer, a Ni layer, and an Au layer (not shown) are laminated in this order from the upper end of the side portion 31b toward the upper side (the seal ring 32 side, the Z1 side). ing.
- the metal seal ring 32 has a base material 32a made of Kovar (29Ni-16Co-Fe alloy) and a silver brazing part 32b disposed on at least the lower surface of the base material 32a.
- heat is applied while the metallized layer 31d of the base 31 and the silver brazing part 32b of the seal ring 32 are in contact with each other, whereby the silver brazing part 32b is melted. Thereby, the base 31 and the seal ring 32 are brazed and joined.
- a protective plating layer 33 made of a Ni plating layer and an Au plating layer (not shown) is formed so as to cover the seal ring 32 in a state where the base 31 and the seal ring 32 are brazed and joined. .
- the lid 1 for hermetic sealing is welded by seam welding, which is a type of resistance welding, in a state where the lid 1 for hermetic sealing is disposed on the upper surface of the seal ring 32 of the electronic component storage member 30. Are joined. That is, the surface layer 11 of the hermetic sealing lid 1 is melted by seam welding, so that the hermetic sealing lid 1 is joined to the upper surface of the seal ring 32.
- a base material (not shown) made of Ni—Cr—Fe alloy and a pair of surface materials (not shown) made of Ni—Cu alloy or Ni are prepared, and the base material is prepared.
- a surface material is arranged on each of both sides.
- the ratio of the thickness of the surface material, the thickness of the base material, and the thickness of the surface material is about 4: 92: 4.
- the base material and the pair of surface materials are rolled using a rolling mill (not shown) to produce a clad material (not shown) in which the surface materials are respectively bonded to both surfaces of the base material. .
- a rolling mill not shown
- the thickness t2 (see FIG. 2) of the base material layer 10 becomes about 74 ⁇ m.
- Both the thickness t3 (see FIG. 2) and the thickness t4 (see FIG. 2) of the surface layer 12 are approximately 3 ⁇ m.
- the clad material is about 2.3 mm long L1 (see FIG. 1) in the longitudinal direction (X direction) and about 1.8 mm long L2 (see FIG. 1) in the short direction (Y direction).
- the base layer 10 and the surface layer 11 press-bonded to the lower surface 10 a (Z2 side surface) and the upper surface 10 b (Z1 side surface) of the base layer 10, respectively.
- And 12 are manufactured, and the lid 1 for hermetic sealing made of a three-layer clad material is manufactured.
- the airtight sealing lid 1 made of the three-layer clad material does not require Ni plating.
- a base 31 and a seal ring 32 are prepared. Then, in a state where the metallized layer 31d (see FIG. 4) of the base 31 and the silver brazing portion 32b (see FIG. 4) of the seal ring 32 are in contact with each other, the base 31 and the seal ring 32 are placed in a vacuum furnace ( (Not shown). Then, the base 31 and the seal ring 32 are brazed and joined by melting the silver brazing portion 32b at a predetermined temperature. Thereafter, by forming the protective plating layer 33 so as to cover the seal ring 32, the electronic component housing member 30 is manufactured.
- the hermetic sealing lid 1 is disposed on the upper surface of the seal ring 32 in a state where the crystal resonator 20 (see FIG. 4) is stored in the electronic component storage member 30. And the lid
- the hermetic sealing lid 1 is made of a base material layer 10 made of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy, and the base material layer 10.
- Each of the lower surface 10a and the upper surface 10b is press-bonded to each other, and is formed of a three-layer clad material composed of Ni—Cu alloy or surface layers 11 and 12 made of Ni.
- Ni plating it is not necessary to perform Ni plating on the surface of the base material layer 10.
- the base material layer 10 is made of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy so that a passive film mainly composed of Cr 2 O 3 is formed on the base material layer 10. Since it is formed on the exposed side surface, the corrosion resistance of the base material layer 10 can be improved as compared with the case where the base material layer 10 is made of Kovar (29Ni-16Co—Fe alloy). Accordingly, the base material layer 10 can be prevented from corroding from the side surface of the base material layer 10 not covered with the surface layers 11 and 12 made of Ni—Cu alloy or Ni. It can suppress that the corrosion resistance of the lid
- the base material layer 10 is composed of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy containing approximately 1% by mass to 10% by mass of Cr.
- the base material layer 10 is composed of a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy containing approximately 6% by mass or more and 10% by mass or less of Cr.
- the thermal expansion coefficient of the base layer 10 is increased, the electronic component housing member 30 constituted by Al 2 O 3, the difference in thermal expansion between the hermetic sealing lid material 1 It is possible to suppress the increase.
- produces between the cover material 1 for airtight sealing and the electronic component storage member 30 can be made small, it suppresses that the electronic component storage package 100 is damaged by thermal stress. can do.
- the base material layer 10 is composed of approximately 36% to 48% by mass of Ni, approximately 6% to 10% by mass of Cr, and 6% to 18% by mass of Co. And Ni—Cr—Co—Fe alloy containing Fe.
- the surface layers 11 and 12 are made of Ni—Cu alloy containing 60% by mass or more of Ni, the surface layers 11 and 12 can more sufficiently contain Ni having excellent corrosion resistance. In the surface layers 11 and 12, not only the corrosion resistance but also the oxidation resistance can be effectively improved. Thereby, even if it is a case where heat processing is performed in air
- the surface layers 11 and 12 have thicknesses t3 and t4 of approximately 3 ⁇ m, respectively, so that the surface layer 11 necessary for joining the surface layer 11 to the electronic component housing member 30 is obtained. Since the thickness t3 can be sufficiently secured, it is possible to further suppress the difficulty of hermetic sealing of the electronic component storage package 100. Moreover, the ratio of the surface layer 11 which does not contribute to joining can be made small enough.
- the surface layers 11 and 12 respectively disposed on the lower surface 1a and the upper surface 1b of the hermetic sealing lid member 1 are made of the same metal material. There is no need to distinguish between front and back. Thereby, the workability
- the hermetic sealing lid 1 is preferably Ni— containing approximately 36% to 48% by mass of Ni and 1% to 10% by mass of Cr and Fe.
- Three layers composed of a base layer 10 composed of a Cr—Fe alloy and a Ni—Cu alloy containing approximately 30% by mass or more of Ni, or surface layers 11 and 12 composed of Ni.
- the hermetic lid 1 is more preferably a Ni—Cr—Fe alloy containing approximately 36% to 48% by mass of Ni and 6% to 10% by mass of Cr and Fe.
- a three-layer clad material composed of a surface layer 11 and 12 made of a Ni—Cu alloy containing approximately 30% by mass or more of Ni.
- the surface layer 11 disposed on the lower surface 1a side of the hermetic sealing lid material 1 functions as a bonding layer that melts when seam-welded to the electronic component housing member 30.
- cover material 1 provided with the surface layer 11 which functions as a joining layer, and the electronic component storage member 30 can be easily joined by seam welding.
- Examples 1 to 4 corresponding to the hermetic sealing lid material 1 (see FIG. 2) of the above embodiment are 42 Ni—
- a base material layer 10 made of 29Ni-6Cr-16Co—Fe alloy and a Ni—Cu alloy are used.
- the hermetic sealing lid 1 made of a three-layer clad material composed of the surface layers 11 and 12 made of Ni was used.
- Example 1 the base material layer 10 composed of a 42Ni-6Cr—Fe alloy containing 42 mass% Ni, 6 mass% Cr and Fe, 30 mass% Ni and 70 mass%
- the airtight sealing cover 1 (30Ni—Cu / 42Ni-6Cr—Fe / 3) composed of a three-layer clad material composed of surface layers 11 and 12 composed of a 30Ni—Cu alloy containing a large amount of Cu. 30Ni-Cu) was used.
- Example 2 unlike Example 1, for airtight sealing provided with a base material layer 10 composed of a 42Ni-4Cr—Fe alloy containing 42% by mass of Ni, 4% by mass of Cr and Fe. Cover material 1 (30Ni—Cu / 42Ni-4Cr—Fe / 30Ni—Cu) was used. That is, in the base material layer 10 of Example 2, the Cr content was made lower than that of the base material layer 10 of Example 1.
- Example 3 unlike Example 1, hermetic sealing lid 1 (65Ni—Cu) provided with surface layers 11 and 12 made of a 65Ni—Cu alloy containing 65% by mass of Ni and Cu. / 42Ni-6Cr-Fe / 65Ni-Cu) was used. That is, in the surface layers 11 and 12 of Example 2, the Ni content was higher than that of the surface layers 11 and 12 of Example 1.
- Example 4 unlike Example 1, hermetic sealing lid 1 (Ni / 42Ni-6Cr—Fe / Ni) having surface layers 11 and 12 made of Ni was used. That is, in the surface layers 11 and 12 of Example 4, unlike Examples 1 to 3, a Ni—Cu alloy containing Cu was not used.
- Example 5 unlike Example 1, a base material composed of a 29Ni-6Cr-16Co—Fe alloy containing 29 mass% Ni, 6 mass% Cr, 16 mass% Co and Fe.
- the lid 1 for hermetic sealing (65Ni—Cu / 29Ni-6Cr-16Co—Fe / 65Ni—Cu) including the layer 10 and the surface layers 11 and 12 made of a 65Ni—Cu alloy was used.
- Example 6 unlike Example 1, an airtight sealing lid member comprising a base material layer 10 made of a 29Ni-6Cr-16Co—Fe alloy and surface layers 11 and 12 made of Ni. 1 (Ni / 29Ni-6Cr-16Co—Fe / Ni) was used.
- a hermetic sealing lid made of a three-layer clad material composed of a base material layer made of 29Ni-16Co-Fe alloy and a pair of surface layers made of Ni (Ni / 29Ni-16Co—Fe / Ni) was used.
- an airtight sealing lid material Ni plating 29Ni-16Co—Fe in which Ni plating was applied to the entire surface of the base material layer made of 29Ni-16Co—Fe alloy was used.
- the lids for hermetic sealing of Examples 1 to 6 and Comparative Examples 1 to 3 have a length of 2.3 mm in the longitudinal direction (X direction) and a length of 1.8 mm in the short direction (Y direction). And 80 ⁇ m thick in the thickness direction (Z direction). Further, the thickness of the base material layer of the hermetic sealing lid materials of Examples 1 to 6 and Comparative Examples 1 and 2 was 74 ⁇ m, and the thickness of the pair of surface layers was 3 ⁇ m. Moreover, the thickness of the base material layer of the sealing material for airtight sealing of Comparative Example 3 was 74 ⁇ m, and the thickness of the Ni plating layer was 3 ⁇ m.
- the degree of corrosion in the hermetic sealing lid materials 1 of Examples 1 to 6 using a Ni—Cr—Fe alloy or a Ni—Cr—Co—Fe alloy as the base material layer 10 is practical. It has been found that there is no problem and that it has sufficient corrosion resistance. This is because in the hermetic sealing lid materials 1 of Examples 1 to 6, a passive film mainly composed of Cr 2 O 3 was sufficiently formed on the portion (side surface) where the base material layer 10 was exposed. it is conceivable that. Furthermore, almost no corrosion could be confirmed in the hermetic sealing lid materials 1 of Examples 1, 3 and 4 using 42Ni-6Cr—Fe alloy as the base material layer 10.
- the Ni—Cr—Fe alloy and the Ni—Cr—Co—Fe alloy preferably contain 6 mass% or more of Cr.
- the degree of corrosion was clearly smaller than that of the airtight sealing lid material of Comparative Examples 1 and 2.
- the corrosion resistance can be improved by using an alloy containing Cr as the base material layer, compared with the case of using the 29Ni-16Co—Fe alloy as the base material layer.
- the lids for hermetic sealing of Examples 1 and 2 and Comparative Examples 2 and 3 and the electronic component storage member 30 shown in FIG. 5 are combined into a semi-automatic seam welder 50 (NAW-1105C) as shown in FIG. , Manufactured by Nippon Avionics Co., Ltd.).
- a semi-automatic seam welder 50 NAW-1105C
- the pair of roller electrodes 50a is moved in the X direction or at a predetermined welding speed along the peripheral edge of the hermetic sealing lid member. It was moved in the Y direction. Thereby, the lid
- the output of the semi-automatic seam welding machine 50 is set to a predetermined reference value and the welding speed is set to 10 mm / sec (basic conditions)
- the air-sealing of Examples 1, 2, and Comparative Examples 2 and 3 Seam welding was performed between the stopper lid and the electronic component housing member (condition fixing test).
- This basic condition is a normal condition when welding the hermetic sealing lid material of Comparative Example 3 (Ni plating 29Ni-16Co—Fe alloy) and the electronic component housing member.
- Examples 1 and 2 unlike Comparative Examples 2 and 3, the surface layer was excessively melted.
- the specific resistance (about 34 ⁇ / cm) of the 30Ni—Cu alloy constituting the surface layer 11 of Examples 1 and 2 is equal to the specific resistance (about 8.5 ⁇ / cm) of Ni constituting the surface layer of Comparative Examples 2 and 3. Therefore, in Examples 1 and 2, the amount of heat generated in the joining region between the hermetic sealing lid member and the electronic component housing member is larger in Examples 1 and 2 than in Comparative Examples 2 and 3.
- the surface layer melts at a lower temperature in Examples 1 and 2 than in Comparative Examples 2 and 3. To do. As a result, due to the large amount of heat generated in the joining region between the hermetic sealing lid member and the electronic component housing member, not only the joining region but also the temperature of the surface layer in the vicinity thereof exceeds the melting point. As a result, it is considered that the surface layer was excessively melted.
- the electronic component housing member 30 and the electronic component housing member 30 can be obtained with a smaller output and a faster welding speed. It has been found that seam welding is possible.
- seam welding between the hermetic sealing lid 1 of Example 1 and the electronic component housing member 30 was performed by changing the output and welding speed (condition change test).
- the output in the basic condition is 1 (predetermined reference value)
- the output ratio in the semi-automatic seam welding machine 50 is 1 (one time the predetermined reference value), 0.8 (0.8 of the predetermined reference value) Times), 0.6 (0.6 times the predetermined reference value), and 0.4 (0.4 times the predetermined reference value).
- the welding speed under the above basic conditions is 1 (10 mm / sec)
- the welding speed ratio in the semi-automatic seam welder 50 is 1 (10 mm / sec), 1.2 (12 mm / sec), 1.6 (16 mm / sec). ), 2.0 (20 mm / sec) and 2.4 (24 mm / sec).
- the surface layer 11 is melted without excess or deficiency although it melts slightly unevenly. did. This is presumably because the amount of heat generated in the joining region between the hermetic sealing lid 1 and the electronic component housing member 30 is reduced by the low output of the semi-automatic seam welder 50.
- the welding speed ratio of the semi-automatic seam welder 50 was 1 and the output ratio was 0.4, the surface layer 11 was not sufficiently melted in the joining region. This is probably because the output of the semi-automatic seam welder 50 was too low.
- the output ratio of the semi-automatic seam welder 50 is 0.8 and the welding speed ratio is 1.6 or 2.0
- the output ratio is 0.6 and the welding speed ratio is 1.
- the surface layer 11 was uniformly melted without excess or deficiency in the joining region.
- the lid 1 for hermetic sealing of Example 1 is used, the output ratio of the semi-automatic seam welder 50 is 0.6 or more and 0.8 or less, and the welding speed ratio is 1.6 or more. If it is 2.0 or less, it has been found that the surface layer 11 can be melted in a uniform state without excess or deficiency.
- Example 1 (30Ni—Cu / 42Ni-6Cr—Fe / 30Ni—Cu), as Example 1-1, the output ratio of the semi-automatic seam welder 50 was 0.8, and the welding speed ratio was An electronic component storage package 100 seam-welded under the conditions of 1.6 was used. Further, as Example 1-2, the electronic component storage package 100 that was seam-welded under the conditions that the output ratio was 0.8 and the welding speed ratio was 2.0 was used. Further, as Example 1-3, the electronic component storage package 100 that was seam-welded under the conditions that the output ratio was 0.6 and the welding speed ratio was 1.6 was used. Further, as Example 1-4, the electronic component storage package 100 that was seam-welded under the conditions that the output ratio was 0.6 and the welding speed ratio was 2.0 was used.
- Example 3 (65Ni—Cu / 42Ni-6Cr—Fe / 65Ni—Cu), Example 4 (Ni / 42Ni-6Cr—Fe / Ni), Example 5 (65Ni—Cu / 29Ni-6Cr-16Co—) Fe / 65Ni—Cu), Example 6 (Ni / 29Ni-6Cr-16Co—Fe / Ni), and Comparative Example 3 (Ni-plated 29Ni-16Co—Fe), Examples 3 to 6 (Comparative Examples) As 3) -1, an electronic component storage package that was seam welded under the condition that the output ratio of the semi-automatic seam welder 50 was 1.0 was used.
- Examples 3 to 6 (Comparative Example 3) -2, electronic component storage packages that were seam welded under the condition that the output ratio of the semi-automatic seam welder 50 was 0.8 were used. Further, as Examples 3 to 6 (Comparative Example 3) -3, electronic component storage packages that were seam welded under the condition that the output ratio of the semi-automatic seam welder 50 was 0.6 were used. In all of Examples 3 to 6 and Comparative Example 3, the welding speed ratio was 1.0.
- the electronic component storage package is not hermetically sealed, He is introduced into the electronic component storage package. Thereafter, the electronic component storage package taken out from the He introduction machine was placed in the leak tester, and the presence or absence of He leak was measured.
- He is introduced into the electronic component storage package, He is detected by the leak tester. As a result, it is detected that a minute hole exists in the electronic component storage package and the hermetic sealing is not performed.
- Examples 1, 3 to 6 (Comparative Example 3) -1, Examples 1, 3 to 6 (Comparative Example 3) -2, Examples 1, 3 to 6 (Comparative Example 3) -3, Also, whether or not bubbles are generated from the electronic component storage package by placing the electronic component storage package of Example 1-4 in a fluorine-based inert liquid at 125 ° C. for 30 seconds. Observed. In the bubble leak test, large holes that are difficult to detect in the He leak test are detected.
- Example 1-4 it has been found that there is an electronic component storage package 100 in which minute holes are present and the hermetic sealing is not completely performed. This is because the output of Example 1-4 is smaller than that of Examples 1-1 and 1-2, and the welding speed is higher than that of Examples 1-1 and 1-3. In this case, it is considered that a part that is not sufficiently melted is likely to occur.
- the output ratio of the semi-automatic seam welder 50 is set to about 0.8. It is considered that the welding speed ratio should be 1.6 or more and 2.0 or less, or the output ratio should be about 0.6 and the welding speed ratio should be about 1.6.
- Examples 3 to 6 in which the Ni content of the surface layer 11 is 65% or more it can be confirmed that even if the output ratio is reduced, no leakage occurs when the welding speed ratio is 1.0. It was. Thereby, even when the melting point of the surface layer is high due to the high Ni content, the surface ratio can be increased by setting the output ratio to 0.6 or more and the welding speed ratio to about 1.0. It was confirmed that the hermetic sealing in the electronic component storage package 100 can be performed completely while the layer 11 is melted in a uniform state.
- Examples 1 and 3 to 6 (Comparative Example 3) -1 and Examples 1 and 3 to 6 (Comparative Examples) were performed under the conditions of 120 ° C., 100% RH and 0.2 MPa (high temperature, high humidity, and high pressure conditions). 3) -2, Examples 1, 3 to 6 (Comparative Example 3) -3 and Example 1-4 electronic component storage packages were held for 96 hours. Thereafter, the same test as the leak test was performed.
- Example 7 a 13Ni—Cu alloy containing 13% by mass of Ni and 87% by mass of Cu was used. In Example 8, a 23Ni—Cu alloy containing 23% by mass of Ni and 77% by mass of Cu was used. In Example 9, a 30Ni—Cu alloy containing 30% by mass of Ni and 70% by mass of Cu was used. As Example 10, a 45Ni—Cu alloy containing 45% by mass of Ni and 55% by mass of Cu was used.
- a plate material of 10 mm ⁇ 10 mm ⁇ 500 ⁇ m (thickness) was used as the Ni—Cu alloy material of Examples 7 to 10.
- a corrosion resistance test was performed on the Ni—Cu alloy materials of Examples 7 to 10. Specifically, a salt spray test was conducted in accordance with JIS C60068-2-11 in the same manner as the corrosion resistance test of the hermetic sealing lid. Then, the degree of corrosion in the Ni—Cu alloy was observed. In FIG. 12, as an evaluation of the corrosion resistance, when almost no corrosion was confirmed in the Ni—Cu alloy, a circle (circle) was given. Further, when some corrosion was confirmed in the Ni—Cu alloy, a ⁇ mark (triangle mark) was given. In addition, when a lot of corrosion was confirmed in the Ni—Cu alloy, a cross (X) was marked.
- Oxidation resistance test of Ni-Cu alloy Furthermore, in order to confirm the oxidation resistance of the Ni—Cu alloy constituting the surface material of the hermetic sealing lid member, an oxidation resistance test of the Ni—Cu alloy was performed. In the oxidation resistance test of the Ni—Cu alloy described below, as shown in FIG. 13, a Ni—Cu alloy plate material or a Ni plate material having different Ni and Cu content rates was used.
- Example 11 a 65Ni—Cu alloy plate material containing 65% by mass of Ni and 35% by mass of Cu was used. Further, as Example 12, a pure Ni plate material containing no Cu was used.
- Example 10 in which the Ni content was 45% by mass in the atmosphere, the Ni—Cu alloy was hardly discolored due to oxidation when heated at 200 ° C. for 1 hour. When heated for 24 hours, a slight discoloration was confirmed in the Ni—Cu alloy. Thus, it has been found that it is preferable to use a Ni—Cu alloy containing 45% by mass or more of Ni in order to improve the oxidation resistance of the hermetic sealing lid to some extent.
- a Ni—Cu alloy containing about 30% by mass of Ni was preferred because it has sufficient corrosion resistance and can have a low melting point. It is considered that it is not very suitable when it needs a good appearance because it is low in chemical conversion and easily discolored.
- the melting point is high, when the appearance is particularly important, it is preferable to use a Ni—Cu alloy containing about 60% by mass of Ni, which has great resistance to oxidation and does not discolor. it is conceivable that.
- the Ni—Cr—Fe alloy and the Ni—Cr—Co—Fe alloy each have a small thermal expansion coefficient at any temperature compared to the thermal expansion coefficient of SUS304 as a comparative example. And had a thermal expansion coefficient close to that of alumina (Al 2 O 3 ). Further, from the table shown in FIG. 15, the Ni—Cr—Fe alloy and the Ni—Cr—Co—Fe alloy each have a small thermal expansion coefficient at any temperature compared to the thermal expansion coefficient of SUS304 as a comparative example. And had a thermal expansion coefficient close to that of alumina (Al 2 O 3 ). Further, from the table shown in FIG.
- Ni—Cr—Fe alloy and Ni— All of the Cr—Co—Fe alloys have a small average thermal expansion coefficient (from 5.8 ⁇ 10 ⁇ 6 / K to 13.4 ⁇ 10 ⁇ 6 / K), and the average thermal expansion of alumina (Al 2 O 3 ). It had an average coefficient of thermal expansion close to the coefficient (7.2 ⁇ 10 ⁇ 6 / K). That is, it is considered that Ni—Cr—Fe alloy and Ni—Cr—Co—Fe alloy are more suitable for the base material layer than SUS304.
- the thermal expansion coefficient of the Ni—Cr—Co—Fe alloy (29Ni-6Cr-16Co—Fe alloy) is higher than that of the 29Ni-16Co—Fe alloy (so-called Kovar) containing no Cr at any temperature. Although the coefficient increased, it became smaller than the thermal expansion coefficient of the Ni—Cr—Fe alloy, and was closest to the thermal expansion coefficient of alumina.
- the average thermal expansion coefficient of alumina was 7.2 ⁇ 10 ⁇ 6 / K in the temperature range from 30 ° C. to 400 ° C., but generally the average thermal expansion coefficient of alumina was from 30 ° C. It is included in the range of 6.4 ⁇ 10 ⁇ 6 / K to 8.1 ⁇ 10 ⁇ 6 / K in the temperature range up to 400 ° C. Therefore, it is considered that an alloy close to the range of the average thermal expansion coefficient of alumina is suitable for the base material layer. That is, a Ni—Cr—Fe alloy having a Ni content of 40% by mass or more, and a Ni—Cr—Co—Fe alloy (29Ni-6Cr-16Co—Fe alloy) are considered suitable for the base material layer. .
- the hermetic sealing lid 1 is composed of the base material layer 10 and the surface layers 11 and 12 that are pressure-bonded to the lower surface 10a and the upper surface 10b of the base material layer 10, respectively.
- the airtight sealing lid member 201 includes the base material layer 10 and the lower surface 10 a of the base material layer 10 (on the electronic component storage member side (Z2
- the surface layer 11 may be constituted by a two-layer clad material composed of the surface layer 11 pressure-bonded to the surface).
- the hermetic sealing lid 301 is pressure-bonded to the base material layer 10 and the lower surface 10a and the upper surface 10b of the base material layer 10, respectively.
- the four-layer clad material is constituted by the silver brazing layer 313 that is pressure-bonded to the lower surface of the surface layer 11 (on the battery component housing member side). May be.
- the silver brazing layer 313 it is preferable to use a silver brazing material composed of 72% by mass of Ag and Cu.
- the electronic component storage member 330 includes only the base 31 and is provided with a seal ring, unlike the above embodiment. Absent.
- the silver brazing layer 313 and the base 31 are welded by seam welding or electron beam welding in a state where the silver brazing layer 313 of the hermetic sealing lid 301 and the metallized layer 31d of the base 31 are in contact with each other. Yes.
- the silver brazing layer 313 made of a silver brazing material composed of 72% by mass of Ag and Cu has a melting point of about 780 ° C. and has a melting point lower than that of Ni—Cu alloy or Ni. It is possible to reduce the thermal stress.
- a welding mark is generated at the outer edge of the hermetic sealing lid member 301 and the base 31, while when electron beam welding is performed, the hermetic sealing lid member.
- a welding mark is generated on the inner side (the side in which the crystal unit 20 is accommodated) than the outer edge of 301 and the base 31.
- the hermetic sealing lid 301 and the seal ring are sealed (brazed joint) without providing a silver brazing part on the seal ring joined to the hermetic sealing lid 301. Therefore, when the electronic component storage package 300 is created, the number of components can be reduced.
- the Ni content of the Ni—Cr—Fe alloy or Ni—Cr—Co—Fe alloy constituting the base layer 10 is about 36 mass% or more and about 48 mass% or less.
- the present invention is not limited to this.
- the base material layer only needs to be made of a Ni—Cr—Fe alloy, and the Ni content may not be about 36 mass% or more and about 48 mass% or less.
- the thermal expansion coefficient of the Ni—Cr—Fe alloy constituting the base material layer approximates the thermal expansion coefficient of the base and the seal ring in order to suppress damage to the electronic component storage package due to thermal stress. It is preferable that
- the surface layers 11 and 12 are made of Ni—Cu alloy or Ni.
- the present invention is not limited to this.
- the surface layer only needs to be made of a Ni alloy, and is not limited to a Ni—Cu alloy or Ni.
- the Ni alloy preferably has a lower melting point than Ni.
- a Ni—Ag alloy, a Ni—Al alloy, a Ni—Au alloy, a Ni—Bi alloy, a Ni—Co alloy, a Ni—Cr alloy, Ni -Fe alloy, Ni-Ti alloy, Ni-Si alloy, Ni-Sn alloy, Ni-Mn alloy, Ni-Mg alloy, Ni-P alloy, Ni-V alloy and Ni-Zn alloy are preferred.
- the surface layers 11 and 12 are made of the same metal material.
- the present invention is not limited to this.
- the surface layers 11 and 12 may be made of different metal materials.
- the surface layer 12 opposite to the electronic component housing member 30 may be made of a Ni—Cu alloy containing Ni and Cu, and a metal material having corrosion resistance other than Ni.
- the thickness of the hermetic sealing lid member may be other than about 80 ⁇ m.
- the thickness of the hermetic sealing lid member is preferably about 70 ⁇ m or more and about 150 ⁇ m or less.
- the thickness of the surface layer disposed at least on the surface on the electronic component housing member side is preferably 1 ⁇ m or more and 10 ⁇ m or less regardless of the thickness of the hermetic sealing lid member.
- the tapered roller is formed by inclining the peripheral edge of the upper surface of the hermetic sealing lid so that the thickness of the hermetic sealing lid becomes smaller toward the outer edge of the hermetic sealing lid. You may match
- the hermetic sealing lid 1 and the electronic component housing member 30 are joined by seam welding, which is a type of resistance welding, is shown, but the present invention is not limited to this.
- the hermetic sealing lid member and the electronic component housing member may be joined by resistance spot welding, which is a type of resistance welding.
- the hermetic sealing lid member and the electronic component housing member may be joined by electron beam welding using an electron beam. At this time, it is preferable to form the surface layer with a Ni—Cu alloy having a low melting point because the surface layer can be easily melted by the electron beam.
- the crystal unit 20 is stored in the electronic component storage member 30 .
- the present invention is not limited to this.
- a SAW filter surface acoustic wave filter
- the present invention is not limited to this.
- a SAW filter surface acoustic wave filter
- Base material layer 10a Lower surface (one surface) 10b Upper surface (the other surface) 11 Surface layer (first surface layer) 12 Surface layer (second surface layer) 20 Crystal resonator (electronic parts) 30, 330 Electronic component storage member 100, 300 Electronic component storage package 313 Silver brazing layer
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Abstract
Description
次に、図2および図5~図15を参照して、上記実施形態の効果を確認するために行った気密封止用蓋材の耐食性試験と、気密封止用蓋材と電子部品収納部材とのシーム溶接試験と、電子部品収納用パッケージのリーク試験および信頼性試験と、気密封止用蓋材の表面材を構成するNi-Cu合金の耐食性試験および耐酸化試験と、基材層の検討とについて説明する。
以下に説明する気密封止用蓋材の耐食性試験では、図7に示すように、上記実施形態の気密封止用蓋材1(図2参照)に対応する実施例1~4として、42Ni-Cr-Fe合金により構成された基材層10と、Ni-Cu合金またはNiにより構成された表面層11および12とから構成された、3層のクラッド材からなる気密封止用蓋材1を用いた。また、上記実施形態の気密封止用蓋材1(図2参照)に対応する実施例5および6として、29Ni-6Cr-16Co―Fe合金により構成された基材層10と、Ni-Cu合金またはNiにより構成された表面層11および12とから構成された、3層のクラッド材からなる気密封止用蓋材1を用いた。
以下に説明する気密封止用蓋材と電子部品収納部材とのシーム溶接試験では、上記実施例1、2、比較例2および3と同一の気密封止用蓋材を用いた。
以下に説明する電子部品収納用パッケージのリーク試験および信頼性試験では、上記シーム溶接試験(条件変化試験)において、実施例1、3~6および比較例3の気密封止用蓋材を用いて作成した電子部品収納用パッケージを各々複数個以上用いて、電子部品収納用パッケージの気密性を確認した。
リーク試験として、JIS C60068-2-17に従い、微小リークを検出するためのHeリーク試験と、大リークを検出するためのバブルリーク試験とを行った。Heリーク試験では、実施例1、3~6(比較例3)-1、実施例1、3~6(比較例3)-2、実施例1、3~6(比較例3)-3、および、実施例1-4の電子部品収納用パッケージをHe導入機内に配置した状態で、He導入機内を脱気して減圧状態にした。その後、He導入機内にHeを0.4MPa(加圧状態)になるまで導入した後、加圧状態で1時間保持した。この際、電子部品収納用パッケージにおいて気密封止がされていない場合には、Heが電子部品収納用パッケージ内に導入される。その後、He導入機から取り出した電子部品収納用パッケージをリーク試験機内に配置して、Heのリークの有無を測定した。ここで、Heが電子部品収納用パッケージ内に導入されている場合には、リーク試験機においてHeが検出される。その結果、電子部品収納用パッケージに微小な孔が存在しており、気密封止がされていないことが検出される。
信頼性試験では、上記リーク試験において、Heのリークが検出されず、かつ、気泡が観察されなかった、合格品の実施例1、3~6(比較例3)-1、実施例1、3~6(比較例3)-2、実施例1、3~6(比較例3)-3、および、実施例1-4の電子部品収納用パッケージを用いた。また、信頼性試験として、プレッシャクッカ試験(PCT)と、ヒートサイクル試験とを行った。なお、実施例3~6-1、実施例3~6(比較例3)-2および実施例3~6(比較例3)-3では、PCTのみを行った。
また、気密封止用蓋材の表面材を構成するNi-Cu合金の耐食性を確認するために、Ni-Cu合金の耐食性試験を行った。以下に説明するNi-Cu合金の耐食性試験では、図12に示すように、NiおよびCuの含有率を異ならせたNi-Cu合金を用いた。
さらに、気密封止用蓋材の表面材を構成するNi-Cu合金の耐酸化性を確認するために、Ni-Cu合金の耐酸化性試験を行った。以下に説明するNi-Cu合金の耐酸化性試験では、図13に示すように、NiおよびCuの含有率を異ならせたNi-Cu合金の板材、または、Niの板材を用いた。
最後に、気密封止用蓋材1に用いられる基材層10を構成するNi-Cr-Fe合金およびNi-Cr-Co-Fe合金の熱膨張係数に基づいて、本発明の基材層に適した合金の組成について検討した。なお、封止における溶接対象(基台31)を構成するアルミナ(Al2O3)の熱膨張係数に近い熱膨張係数を有するNi-Cr-Fe合金およびNi-Cr-Co-Fe合金が、基材層として適していると考えられる。なお、図15では、温度変化に対する熱膨張係数の変化をグラフにするとともに、図16では、所定の温度範囲(30℃から300℃まで、30℃から400℃までおよび30℃から500℃まで)における平均熱膨張係数を示す。
10 基材層
10a 下面(一方表面)
10b 上面(他方表面)
11 表面層(第1表面層)
12 表面層(第2表面層)
20 水晶振動子(電子部品)
30、330 電子部品収納部材
100、300 電子部品収納用パッケージ
313 銀ろう層
Claims (18)
- 電子部品を収納するための電子部品収納部材を含む電子部品収納用パッケージに用いられる気密封止用蓋材であって、
NiとCrとFeとを含有するNi-Cr-Fe合金、または、NiとCrとCoとFeとを含有するNi-Cr-Co-Fe合金により構成された基材層と、
前記基材層の前記電子部品収納部材側の一方表面に少なくとも接合され、Ni、または、Ni合金により構成された表面層とを備えるクラッド材により構成されている、気密封止用蓋材。 - 前記基材層は、1質量%以上10質量%以下のCrを含有するNi-Cr-Fe合金、または、Ni-Cr-Co-Fe合金により構成されている、請求項1に記載の気密封止用蓋材。
- 前記基材層は、6質量%以上10質量%以下のCrを含有するNi-Cr-Fe合金、または、Ni-Cr-Co-Fe合金により構成されている、請求項2に記載の気密封止用蓋材。
- 前記基材層は、6質量%以上18質量%以下のCoを含有するNi-Cr-Co-Fe合金により構成されている、請求項1に記載の気密封止用蓋材。
- 前記表面層は、NiとCuとを含有するNi-Cu合金により構成されている、請求項1に記載の気密封止用蓋材。
- 前記表面層は、30質量%以上のNiを含有するNi-Cu合金により構成されている、請求項5に記載の気密封止用蓋材。
- 前記表面層は、60質量%以上のNiを含有するNi-Cu合金により構成されている、請求項6に記載の気密封止用蓋材。
- 前記表面層は、1μm以上10μm以下の厚みを有する、請求項1に記載の気密封止用蓋材。
- 前記表面層は、2μm以上6μm以下の厚みを有する、請求項8に記載の気密封止用蓋材。
- 前記表面層は、前記基材層の前記電子部品収納部材側の前記一方表面上に接合された第1表面層と、前記基材層の前記電子部品収納部材とは反対側の他方表面上に接合された第2表面層とを含む、請求項1に記載の気密封止用蓋材。
- 前記第2表面層は、前記第1表面層と同一の金属材料からなる、請求項10に記載の気密封止用蓋材。
- 前記クラッド材は、前記第1表面層の前記電子部品収納部材側の表面に少なくとも接合された銀ろう層を含む、請求項10に記載の気密封止用蓋材。
- 前記基材層は、36質量%以上48質量%以下のNiと、1質量%以上10質量%以下のCrと、Feとを含有するNi-Cr-Fe合金により構成されており、
前記第1表面層および前記第2表面層は、共に、30質量%以上のNiを含有するNi-Cu合金、または、Niにより構成されている、請求項11に記載の気密封止用蓋材。 - 前記基材層は、36質量%以上48質量%以下のNiと、6質量%以上10質量%以下のCrと、Feとを含有するNi-Cr-Fe合金により構成されており、
前記第1表面層および前記第2表面層は、共に、30質量%以上のNiを含有するNi-Cu合金により構成されている、請求項13に記載の気密封止用蓋材。 - 前記クラッド材は、1質量%以上10質量%以下のCrと、6質量%以上18質量%以下のCoと、Feとを含有するNi-Cr-Co-Fe合金により構成されている、請求項4に記載の気密封止用蓋材。
- 前記基材層の前記電子部品収納部材側の前記一方表面に接合されている前記表面層は、前記電子部品収納部材に対して抵抗溶接される際に、溶融する接合層として機能するように構成されている、請求項1に記載の気密封止用蓋材。
- 電子部品を収納するための電子部品収納部材と、
前記電子部品収納部材に対して抵抗溶接される請求項1に記載の気密封止用蓋材とを備える、電子部品収納用パッケージ。 - 前記基材層の前記電子部品収納部材側の前記一方表面に接合されている前記表面層は、前記電子部品収納部材に対して前記抵抗溶接される際に、溶融する接合層として機能している、請求項17に記載の電子部品収納用パッケージ。
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