WO2007145128A1 - ソケットとその製造方法及び半導体装置 - Google Patents
ソケットとその製造方法及び半導体装置 Download PDFInfo
- Publication number
- WO2007145128A1 WO2007145128A1 PCT/JP2007/061539 JP2007061539W WO2007145128A1 WO 2007145128 A1 WO2007145128 A1 WO 2007145128A1 JP 2007061539 W JP2007061539 W JP 2007061539W WO 2007145128 A1 WO2007145128 A1 WO 2007145128A1
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- WO
- WIPO (PCT)
- Prior art keywords
- socket
- elastomer sheet
- hole
- elastomer
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
- H01R33/74—Devices having four or more poles, e.g. holders for compact fluorescent lamps
- H01R33/76—Holders with sockets, clips, or analogous contacts adapted for axially-sliding engagement with parallely-arranged pins, blades, or analogous contacts on counterpart, e.g. electronic tube socket
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/02—Arrangements of circuit components or wiring on supporting structure
- H05K7/10—Plug-in assemblages of components, e.g. IC sockets
- H05K7/1053—Plug-in assemblages of components, e.g. IC sockets having interior leads
- H05K7/1061—Plug-in assemblages of components, e.g. IC sockets having interior leads co-operating by abutting
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/22—Contacts for co-operating by abutting
- H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistors
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits
- H05K3/325—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by abutting or pinching; Mechanical auxiliary parts therefor
- H05K3/326—Assembling printed circuits with electric components, e.g. with resistors electrically connecting electric components or wires to printed circuits by abutting or pinching; Mechanical auxiliary parts therefor the printed circuit having integral resilient or deformable parts, e.g. tabs or parts of flexible circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/7082—Coupling device supported only by cooperation with PCB
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0104—Properties and characteristics in general
- H05K2201/0133—Elastomeric or compliant polymer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0364—Conductor shape
- H05K2201/0367—Metallic bump or raised conductor not used as solder bump
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09009—Substrate related
- H05K2201/09081—Tongue or tail integrated in planar structure, e.g. obtained by cutting from the planar structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09372—Pads and lands
- H05K2201/0949—Pad close to a hole, not surrounding the hole
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10227—Other objects, e.g. metallic pieces
- H05K2201/10378—Interposers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/42—Plated through-holes or plated via connections
- H05K3/425—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern
- H05K3/427—Plated through-holes or plated via connections characterised by the sequence of steps for plating the through-holes or via connections in relation to the conductive pattern initial plating of through-holes in metal-clad substrates
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
- H10W72/072—Connecting or disconnecting of bump connectors
- H10W72/07251—Connecting or disconnecting of bump connectors characterised by changes in properties of the bump connectors during connecting
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/20—Bump connectors, e.g. solder bumps or copper pillars; Dummy bumps; Thermal bumps
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/721—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bump connectors
- H10W90/724—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bump connectors between a chip and a stacked insulating package substrate, interposer or RDL
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
Definitions
- Socket manufacturing method thereof, and semiconductor device
- the present invention relates to a socket used when mounting an IC package such as a CPU or LSI on a printed circuit board, and particularly suitable for mounting an LGA package or an BGA package IC package on the printed circuit board.
- the present invention relates to a socket, a method of manufacturing the socket, and a semiconductor device using the socket.
- CPUs are increasing in number of pins and speeding up year by year to improve their functions and performance, and are responding by increasing package size and fine pitch.
- sockets need to be able to cope with the increase in the number of pins, as well as to cope with an increase in the amount of deflection accompanying an increase in the size of the package and to deal with variations in the contact land of the package and the height of the ball. Therefore, a structure that can secure the contact stroke in the socket is required.
- the current mainstream sockets for LGA packages are 400mm to 800mm pins with about lmm pitch It is.
- a method is used in which a metal plate is bent in a complicated manner to form a contact terminal portion having a predetermined shape, and the contact terminal portion is inserted into the socket housing.
- Patent Document 1 Japanese Patent Laid-Open No. 2004-158430
- Patent Document 2 Japanese Patent Laid-Open No. 2005-19284
- Patent Document 3 US Pat. No. 6,669,490
- Patent Document 4 Japanese Patent Laid-Open No. 2001-332321
- Patent Document 3 a technique disclosed in Patent Document 3 has been proposed as a structure in which a column made of a conductive elastomer is used for a contact that solves this problem.
- the resilience of the socket is determined by the characteristics and structure of the conductive elastomer, if there is a conductive elastomer with an appropriate repulsive force, it is possible to ensure a sufficient stroke at the required load. Is feasible.
- Patent Document 4 includes an insulating elastic sheet body such as silicone rubber, and the elastic sheet body so that both end surfaces are exposed on the surface of the sheet body through the thickness direction of the elastic sheet body.
- the elastic sheet body has the same A pair of protrusions projecting from the front and back to the front and back, and a pair of connection electrodes are formed at a plurality of locations on the front and back to cover at least the top surface of each of the protrusions, and the connection electrodes on the front and back are formed on the elastic sheet body
- An electrical connector is disclosed that is electrically connected through a through hole formed therein.
- the connector disclosed in Patent Document 4 has a structure in which the protrusion la is sandwiched between upper and lower substrates when a load is applied, as shown in FIG. The effect of removing the oxide film by the effect cannot be obtained
- the present invention has been made in view of the above circumstances, and an object thereof is to provide a socket having an excellent contour external terminal portion that can cope with low resistance, large current, and high speed, and a semiconductor device using the socket. .
- the present invention is provided on an insulating elastomer sheet made of a fluorine-based elastomer provided with a through hole, and at least a part of the front and back surfaces of the elastomer sheet. It has a metal circuit and a through hole formed by forming a metal film on the inner wall of the through hole, and the metal circuit on the front side and the metal circuit on the back side of the elastomer sheet are electrically connected by a through hole. And providing a socket provided with a groove or a through hole in at least a part of the periphery of the metal circuit of the elastomer sheet.
- the socket of the present invention may have a configuration in which a plurality of terminal portions each including the metal circuit and a through hole are provided, and the groove is provided in the entire region other than the terminal portions.
- convex portions are provided on at least a part of the metal circuit on the front surface side and the back surface side of the elastomer sheet.
- the convex portion has a rigidity that causes the convex portion itself to be deformed by pressing and deforming a portion in contact with the convex portion of the elastomer sheet when a load is applied to the convex portion. It is preferable.
- the socket of the present invention may have a configuration in which a protective layer having a material force having a smaller thermal expansion coefficient than that of the elastomer sheet is laminated on at least one surface of the elastomer sheet.
- the protective layer is made of a polyimide sheet and glass epoxy. Preferred, or both.
- the elastomer sheet may have a structure in which one elastomer layer is stacked on the front and back of a sheet-like core material made of a material having a smaller thermal expansion coefficient than that of the elastomer sheet.
- a through hole provided in the elastomer sheet and a through hole provided in the core member exist concentrically, and a metal film is formed on an inner wall of these through holes. It is preferable that the through hole is formed.
- the core material is preferably one or both of a polyimide sheet and glass epoxy.
- the present invention provides (1) an insulating elastomer sheet made of a fluorine-based elastomer provided with a through-hole, and (2) next, at least part of the front and back surfaces of the elastomer sheet.
- an insulating elastomer sheet made of a fluorine-based elastomer provided with a through-hole
- (2) next, at least part of the front and back surfaces of the elastomer sheet By forming a metal circuit and forming a metal film on the inner wall of the through hole to form a through hole, the metal circuit on the front side and the metal circuit on the back side of the elastomer sheet are electrically connected by the through hole.
- a socket manufacturing method for obtaining a socket provided with a groove or a through hole in at least a part of the periphery of the metal circuit of the elastomer sheet.
- the socket manufacturing method of the present invention may have a configuration in which a plurality of terminal portions each including the metal circuit and a through hole are provided, and the groove is provided in the entire region other than the terminal portions. .
- the socket manufacturing method of the present invention it is preferable that at least a part of the metal circuit on the front surface side and the back surface side of the elastomer sheet is provided with convex portions.
- the convex portion is deformed by pressing and deforming a portion of the elastomer sheet that contacts the convex portion when a load is applied to the convex portion. Shina, it is preferable to have rigidity.
- a protective layer having a material strength having a smaller thermal expansion coefficient than that of the elastomer sheet may be laminated on one surface.
- the protective layer is preferably one or both of a polyimide sheet and glass epoxy.
- the elastomer sheet has a configuration in which elastomer layers are laminated on the front and back of a sheet-like core material made of a material having a smaller thermal expansion coefficient than that of an elastomer sheet. Also good.
- the through hole provided in the elastomer sheet and the through hole provided in the core member are present concentrically, and a metal film is formed on the inner wall of these through holes. It is also possible to form a through-hole.
- the core material is preferably one or both of a polyimide sheet and a glass epoxy.
- the present invention also provides a semiconductor device comprising the socket according to the present invention, and a printed circuit board and an IC package electrically connected via the socket.
- the socket of the present invention includes an insulating elastomer sheet made of a fluorine-based elastomer provided with a through hole, a metal circuit provided on at least a part of the front and back surfaces of the elastomer sheet, A through hole formed by forming a metal film on the inner wall of the through hole, and the metal circuit on the front side of the elastomer sheet and the metal circuit on the back side are electrically connected by a through hole, and the elastomer sheet Since a groove or a through-hole is provided in at least a part of the periphery of the metal circuit, a socket can be manufactured with a small number of parts, and a low-cost socket can be provided.
- the contact portion is made of metal, the same metal treatment as that of the connection terminal portion can be performed, and connection with a low contact resistance is possible.
- the metal circuit sinks into the elastomer sheet with the through hole as a fulcrum, so the position is shifted while rubbing against the opposing contact surface. This makes it possible to connect the fresh metal surfaces by removing the oxide film and foreign matter on the metal surface, thereby enabling electrical connection with low resistance.
- the influence of the warp of the substrate can be reduced because the elastic sheet of the elastomer follows the warped shape.
- the elastomer sheet is formed of a fluorine-based elastomer, the heat resistance is improved, and when this socket is joined to a substrate or a package, the solder can be reflowed to facilitate the joining process. Thus, the production cost can be reduced.
- the fluoroelastomer hardly changes in hardness even at low temperatures, it can provide a socket with a wide operating temperature range.
- fluorine elastomers have no outgassing problems.
- the siloxane is released and causes contact failure. If the elastomer sheet is made of fluorine-based elastomer, contact deterioration due to outgassing does not occur and long-term reliability is achieved. A socket with excellent properties can be provided.
- fluorine elastomers have excellent chemical resistance and can withstand alkali development, etching, and plating processes. Therefore, if the elastomer sheet is formed of a fluorine-based elastomer, an extra operation for protecting the sheet is unnecessary and the socket manufacturing process can be simplified.
- the elastomer when the load is applied, the elastomer can escape to the groove or the through hole, so that the same displacement can be driven with a low load. As a result, there is an advantage that the total load can be lowered in a multi-pin socket.
- the metal circuit and through-holes can be adjusted by adjusting the dimensions of the grooves or through-holes. Even with a structure in which a large number of terminal parts are arranged IJ, the load-displacement characteristics of the socket can be controlled, and various sockets with different load-displacement characteristics can be easily manufactured. As a result, it is possible to meet the demand for various sockets having different load-displacement characteristics.
- a convex portion is provided on at least a part of the metal circuit on the front surface side and the back surface side of the elastomer sheet, even for a flat electrode such as a printed circuit board or an LGA package, a predetermined amount is provided. It can be used with load-displacement characteristics, and the application range of sockets can be expanded. In addition, by using this socket for connecting the LGA package and the board, the man-hours for connection can be greatly reduced.
- a protective layer made of a material having a smaller thermal expansion coefficient than the elastomer sheet on at least one surface of the elastomer sheet, expansion and contraction of the socket due to heat generated by the IC package force can be suppressed. Even with a structure in which a large number of terminal parts composed of metal circuits and through holes are arranged, connection of all the terminal parts can be ensured when a load is applied.
- the socket of the IC package is generated by heat generated by the IC package. Can suppress expansion and contraction. As a result, even if a structure in which a large number of terminal portions each made up of a metal circuit and a single hole are arranged 1J is secured, connection of all the terminal portions can be ensured when a load is applied.
- the socket according to the present invention described above can be manufactured inexpensively and efficiently.
- the manufacturing method of the present invention by attaching a metal foil that becomes a metal circuit to an elastomer sheet that is a base material, it is possible to perform through-hole contact by electrolytic contact.
- the socket can be manufactured more efficiently.
- the semiconductor device of the present invention includes the socket according to the present invention, and a printed circuit board and an IC package that are electrically connected via the socket, low resistance, high current, and high speed are achieved. It is possible to provide a high-performance device that can be used.
- FIG. 1 is a side sectional view showing a first embodiment of a socket according to the present invention.
- 2A As an example of the semiconductor device using the socket of the first embodiment, it is a diagram showing a contact operation when this socket is used as a socket for an IC of a BGA package, and before the pressing force is applied to the semiconductor device.
- FIG. 6 is a side sectional view showing a state (or a restored state after applying a pressing force).
- FIG. 2B As an example of the semiconductor device using the socket of the first embodiment, it is a diagram showing a contact operation when this socket is used as a socket for an IC of a BGA package, and a pressing force is applied to the semiconductor device. It is side surface sectional drawing which shows the state of time.
- FIG. 4A As an example of the semiconductor device using the socket of the second embodiment, it is a diagram showing a contact operation when this socket is used as a socket for an IC of an LGA package, and before the pressing force is applied to the semiconductor device.
- FIG. 6 is a side sectional view showing a state (or a restored state after applying a pressing force).
- FIG. 4B As an example of the semiconductor device using the socket of the second embodiment, it is a diagram showing a contact operation when this socket is used as a socket for an IC of an LGA package, and a pressing force is applied to the semiconductor device. It is side surface sectional drawing which shows the state of time.
- FIG. 6 A plan view showing a fourth embodiment of the socket of the present invention.
- FIG. 7 A plan view showing a fifth embodiment of the socket of the present invention.
- FIG. 8] is a side sectional view showing a fifth embodiment of the socket of the present invention.
- FIG. 9 is a plan view showing a sixth embodiment of the socket of the present invention.
- FIG. 10 is a side sectional view showing a sixth embodiment of the socket of the present invention.
- FIG. 13A is a plan view of a socket showing an eighth embodiment of the socket of the present invention.
- FIG. 13B is a cross-sectional view taken along the line AA ′ of FIG. 13A, showing an eighth embodiment of the socket of the present invention.
- 14A As an example of a semiconductor device using the socket of the eighth embodiment, it is a diagram showing a contact operation when this socket is used as a socket for an LG A package IC.
- FIG. 5 is a side cross-sectional view showing a state before the pressing force is applied to the semiconductor device (or a restored state after the pressing force is applied).
- FIG. 14B is a view showing a contact operation when this socket is used as a socket for an IC of LGA package as an example of a semiconductor device using the socket of the eighth embodiment, and a pressing force is applied to the semiconductor device. It is side surface sectional drawing which shows a state when provided.
- FIG. 15 is a process diagram showing an example of a method for manufacturing a socket according to an eighth embodiment.
- FIG. 16A is a plan view of a socket showing a ninth embodiment of the socket of the present invention.
- FIG. 16B is a cross-sectional view taken along the line ⁇ _ ⁇ ′ of FIG. 16A, showing a ninth embodiment of the socket of the present invention.
- FIG. 17A is a diagram showing a contact operation when this socket is used as a socket for an IC of an LG ⁇ package as an example of a semiconductor device using the socket of the ninth embodiment. It is side surface sectional drawing which shows the previous state (or restoration state after pressing force provision).
- FIG. 17B is a view showing a contact operation when this socket is used as a socket for an IC of LGA package as an example of a semiconductor device using the socket of the ninth embodiment, and a pressing force is applied to the semiconductor device. It is side surface sectional drawing which shows a state when provided.
- FIG. 18 is a process diagram showing an example of a method for manufacturing a socket according to a ninth embodiment.
- Protective layer 61A, 81A ... Core material, 61B, 81B ... Elastomer layer, 71 ... Copper foil (copper foil with adhesive), 72 ... Through hole, 73 ... Metal film 82, 92 ... Dome part (convex part) 83, 93 ... Terminal part 84, 94 ... Through hole fitting part 95-U slit ( Through-hole).
- FIG. 1 is a side sectional view showing a first embodiment of the socket of the present invention.
- the socket 10 of the present embodiment includes an insulating elastomer sheet 11 provided with a through hole, metal circuits 12A and 12B provided on the front and back surfaces of the elastomer sheet 11, and a metal film on the inner wall of the through hole.
- the metal circuit 12A on the front surface side of the elastomer sheet 11 and the metal circuit 12B on the rear surface side are electrically connected by the through hole 13.
- the metal circuit 12 A, 12 B provided on the front and back surfaces of the elastomer sheet 11 is provided with a gold plating 14.
- the socket 10 of the present embodiment uses a metal foil made of a metal having good conductivity such as copper as a contact terminal portion for connection to a printed circuit board and an IC package, and the repulsive force is an elastomer sheet.
- 11 is a socket structure secured. By adopting this structure, it is possible to design the load stroke characteristics with the characteristics of an elastomer, even though it is a contact by metal contact. Further, in the socket 10 of the present embodiment, since current flows through the formed metal circuits 12A and 12B, it is possible to realize a socket corresponding to high current and high speed with low contact resistance. Moreover, since the socket base material and the elastomer for ensuring the repulsive force are integrated, a socket with a small number of parts can be realized.
- an insulating elastomer made of a fluorine-based elastomer that can exhibit an appropriate elastic repulsion when a load is applied to the metal circuits 12A and 12B is used. Yes.
- the heat resistance is increased, and when this socket is joined to a board or package, the solder can be reflowed, the joining process is simplified, and the production cost is reduced. It becomes possible to reduce.
- the fluorine elastomer hardly changes in hardness even at low temperatures, it can provide a wide range of operating temperatures.
- fluorine elastomers have no outgassing problems.
- silicon rubber the force that releases siloxane and causes contact failure Fluoro-based elastomers do not cause contact deterioration due to outgassing and can provide a socket with excellent long-term reliability.
- fluorine-based elastomers have excellent chemical resistance, alkali development, etching, plating Since it withstands the process, no extra operation is required to protect the sheet, and the socket manufacturing process can be simplified.
- an elastomer sheet made of a fluorine-based elastomer is used as a starting material.
- a through hole serving as a through hole is drilled in a predetermined position on the sheet with a drill or a laser.
- an elastomer sheet with through holes formed from the beginning may be formed by molding.
- a metal film is formed on the front surface, the back surface, and the through-holes serving as through-holes of the elastomer sheet.
- this metal film In order to form this metal film, methods such as electroless plating and vapor deposition are employed.
- the elastomer sheet When the elastomer sheet is difficult to be plated, it can be activated by a solution such as immersion treatment of metal sodium mononaphthalene complex solution on the elastomer sheet, as described in, for example, JP-A-7-122850.
- the adhesion with the plating layer may be enhanced by roughening the surface with sand blasting or plasma ashing, which can be processed by heat treatment.
- the metal film produced at this stage is preferably a metal having good conductivity such as copper or aluminum.
- a metal film is formed by plating on the front surface, the back surface, and all the through holes that are to be through holes.
- electroless plating or vapor deposition takes a very long time to form a thick metal film. After applying a thin metal film with electroless plating beforehand, If the metal sheet is applied, a thick metal film can be applied to the elastomer sheet.
- an etching resist is applied in order to form a desired metal circuit on the front and back surfaces of the elastomer sheet.
- the method of applying the etching resist include a method of applying a dry innolem, a method of applying a liquid resist by spin coating, and a method of spraying in the form of a mist by spray coating.
- the sample having the resist coated on the metal surface is subjected to pattern printing using a pattern mask having a desired circuit shape, and cured to remove the resist from unnecessary portions. To do. Then, a resist with a resist remaining on a desired circuit is completed. This state In order to form a circuit, an aqueous solution of iron chloride, copper chloride, ammonium hydroxide or the like is used to form the circuit.
- FIG. 2A and 2B are diagrams showing a contact operation when the socket 10 is used as a socket for an IC of a BGA package as an example of a semiconductor device using the socket 10 of the present embodiment.
- FIG. 2A is a side cross-sectional view showing a state before the pressing force is applied to the semiconductor device 15 (or a restored state after the pressing force is applied), and
- FIG. 2B is a side view showing a state when the pressing force is applied to the semiconductor device 15.
- reference numeral 15 is a semiconductor device
- 16 is a printed circuit board
- 16A is a circuit pattern
- 16B is a solder paste
- 17 is a BGA package (IC package)
- 17A is a solder ball.
- the solder paste 16 B is applied to the printed circuit board 16 only in a necessary portion in advance, and one side of the socket 10 is formed thereon.
- the electrical circuit can be realized by mounting the metal circuit 12B and soldering it through a reflow furnace.
- an elastomer sheet 11 having heat resistance that can withstand reflow.
- a fluorine-based elastomer that can withstand reflow is commercially available.
- FIG. 2A shows a state where the IC of the BGA package 17 is placed on the printed circuit board 16 with the socket 10 mounted thereon.
- the elastomer sheet 11 When a load is applied to this, the elastomer sheet 11 is compressed and a repulsive force is generated accordingly. It sinks while being born, and the load at this time and the sinking that occurs are the load-displacement characteristics.
- the metal circuit 12A sinks around the through-hole 13 as a fulcrum, so when a load is applied, the contact point moves to the through-hole 13 side, thereby providing a wiping effect, and each metal contact It is possible to remove the oxide film on the surface and bring fresh metal surfaces into contact with each other. Therefore, contact can be realized with low resistance. Further, by reducing the diameter of the through hole 13, the short pitch distance and the socket 10 can be realized.
- the present embodiment is a technique that can constitute a socket capable of realizing a large stroke with a low load with a low contact resistance when the terminal portion is convex like a BGA package.
- the plated metal circuit parts 12A and 12B are integrated with the mold part, which is made of a soft elastomer. For this reason, even if the printed circuit board on which the socket 10 is installed is warped, the elastomer follows the warpage, so that the influence of the warpage of the board can be reduced.
- FIG. 3 is a side cross-sectional view showing a second embodiment of the socket of the present invention.
- the socket 20 of the present embodiment is configured to include substantially the same components as the socket 10 of the first embodiment described above, and the same components are denoted by the same reference numerals.
- the socket 20 of the present embodiment is characterized in that a dome-shaped convex portion 21 is provided on a part of the metal circuits 12A and 12B provided on the front and back surfaces of the elastomer sheet 11.
- the socket 20 of this embodiment is a terminal land on the IC package side, the contact part is replaced during maintenance as in the case of a server socket.
- This is a socket structure used to connect the LGA package and the printed circuit board, which is used when desired.
- the basic characteristics are the same as those of the socket 10 of the first embodiment.
- the socket 20 of this embodiment is provided with a convex portion 21 at a part of the metal circuit 12A, 12B forming portion. Stroke is generated depending on the height of.
- the socket 20 of the present embodiment can be manufactured by the same manufacturing method as the socket 10 of the first embodiment described above, except that the convex portion 21 is provided.
- Such a convex portion 21 can be formed by masking and selectively engaging other than the portion where the convex portion 21 is provided.
- a metal film is attached in advance by the height of the convex portion 21, and the convex portion Masking 21 and selectively etching areas other than convex 21 is acceptable.
- the convex portion 21 may be formed by vapor deposition or printing.
- FIG. 4 is a diagram showing a contact operation when this socket 20 is used as a socket for an IC of an LGA package as an example of a semiconductor device using the socket 20 of the present embodiment.
- 4A is a side cross-sectional view showing a state of the semiconductor device 22 before the pressing force is applied (or a restored state after the pressing force is applied), and
- FIG. 4B is a side cross-sectional view showing a state when the pressing force is applied to the semiconductor device 22.
- FIG. In these drawings reference numeral 22 is a semiconductor device, 23 is a printed circuit board, 23A is pattern wiring, 24 is an LGA package (IC package), and 24A is an LGA land.
- FIG. 4A shows a state in which the socket 20 is placed on the printed circuit board 23 and the LGA package 24 is placed on the socket 20.
- this socket structure by providing the convex portion 21 on the plated metal circuit portion, a stroke is generated depending on the height of the convex portion 21.
- FIG. 4B shows a state where a load is applied in this state.
- the elastomer sheet 11 When a load is applied, the elastomer sheet 11 is compressed and sinks while generating a repulsive force, and the load at this time and the generated sink become load-displacement characteristics. Also, since the metal circuits 12A and 12B sink around the through hole 13 as a fulcrum, the contact point moves to the through hole 13 side when a load is applied. Since the oxide film on the surface can be removed and the fresh metal surfaces can be brought into contact with each other, the contact can be realized with low resistance. Needless to say, the height and width of the elastomer sheet 11 should be designed to have a resilience that satisfies the required load-stroke characteristics. In particular, the height of the elastomer sheet should be at least a stroke. The size needs to be larger than the minute.
- FIG. 5 is a side cross-sectional view showing a third embodiment of the socket of the present invention.
- the socket 30 of the present embodiment includes an insulating elastomer sheet 31 provided with through holes and a plurality of convex portions 35 on the front and back surfaces, and a metal circuit provided on the front and back surfaces of the elastomer sheet 31. 3 2A, 32B, and a through hole 33 formed by forming a metal film on the inner wall of the through hole,
- the metal circuit 32A on the front surface side and the metal circuit 32B on the back surface side of the elastomer sheet 31 are electrically connected through a through hole 33.
- a gold plating 34 is provided on the metal circuits 32A and 32B.
- the convex portions 35 provided on the front and back surfaces of the elastomer sheet 31 are covered with metal circuits 32A and 32B, and further, a metal fitting 34 is provided.
- the socket 30 of the present embodiment is similar to the socket 20 of the second embodiment described above in that it has a terminal portion force S on the IC package side, a contact portion as in the case of a land or a server socket.
- This socket structure is used to connect the LGA package and the printed circuit board, which is used when connecting the land without soldering the printed circuit board side for replacement during tenancy.
- the basic characteristics are the same as those of the socket 20 of the second embodiment, and the stroke is generated by the height of the convex portion 35.
- the convex part 35 is provided in advance on the elastomer sheet 31 as in the present embodiment, and the convex part 35 and the metal circuit forming part, It is also possible to apply a treatment such as plating to the through-hole part.
- the convex portion 35 formed on the elastomer sheet 31 can be easily formed by preparing a mold having a concave portion provided with the convex portion 35 at a desired position when the elastomer sheet 31 is formed. it can.
- the problem is whether or not an etching resist can be applied to the surface including the concavo-convex portion.
- a spin coating method using centrifugal force and surface tension is used to form a thick resist film. It is difficult to apply the spin coating method to apply the resist to a place that is not flat. For this reason, resist coating is also performed by spray coating.
- the spray coating method is a method in which a resist ink adjusted to a viscosity suitable for coating is atomized with a spray gun to obtain a coating film on a substrate.
- Spray guns used include airless sprays, air sprays, and bell-type sprays that can be applied to uneven surfaces. Further, it is preferable to use a method in which a pattern can be directly exposed to an applied photoresist (photosensitive resin), such as electron beam (EB) exposure, for exposure of the uneven surface.
- EB electron beam
- electron beam exposure that performs pattern transfer by irradiating an electron beam. Compared to light, etc., light has a feature that it has a high depth of focus as well as a high resolution, and is useful when performing three-dimensional drawing. Moreover, even if it is not electron beam exposure, exposure is possible if it is non-contact exposure using the mask which does not contact this uneven
- the socket 30 of the present embodiment is a technology that can constitute a socket contact terminal portion that can realize a large stroke with a low load with a low contact resistance even in the case of a flat terminal portion such as an LGA package or a land of a printed circuit board. . Sockets for ICs in LGA packages that have greatly reduced the number of work steps by providing protrusions on the elastomer in advance and applying plating and other treatments to the protrusions, metal circuit formation, and through-holes. A structure can be realized.
- the contact operation of the socket 30 of this embodiment is the same as that of the socket 20 of the second embodiment shown in FIGS. 4A and 4B.
- FIG. 6 is a plan view showing a fourth embodiment of the socket of the present invention.
- the socket 40 of this embodiment includes an insulating elastomer sheet 41 provided with a through-hole and a U-shaped groove 46 provided along the periphery of the terminal portion forming region, and the elastomer sheet 41 It has a metal circuit 42 provided on the front and back surfaces, and a through hole 43 formed by forming a metal film on the inner wall of the through hole, and the metal circuit 42 on the front surface side of the elastomer sheet 41 and the metal on the back surface side. A circuit (not shown) is electrically connected through a through-hole 43.
- the metal circuit 42 is provided with a convex portion 44 similar to the convex portion in the second and third embodiments described above, and a metal fitting 45 is provided on the metal circuit 42 including the convex portion 44. Les.
- the socket 40 of this embodiment is provided with a groove 46 in a U-shape along the periphery of the terminal portion forming region on at least one of the front surface and the back surface of the elastomer sheet 41, a load was applied. In this state, the transmission of force due to the tension and compression of the elastomer generated between the P-contact terminals can be reduced. Therefore, as shown in FIG. 6, even when a structure in which a large number of terminal portions each including the metal circuit 42 and the through hole 43 are arranged, it is possible to ensure the connection of all the terminal portions when a load is applied.
- the load-displacement characteristics of the socket 40 can be controlled, and various sockets with different load-displacement characteristics can be easily manufactured. It can respond to various socket requirements. Also, Since current flows through the circuit forming part, it is possible to realize low inductance by shortening the electrical conduction path, and to provide a socket corresponding to low resistance, high current, and high speed.
- the socket 40 of the present embodiment can be manufactured in the same manner as the socket manufacturing method in the first to third embodiments described above, except for the step of forming the groove 46.
- the groove 46 is formed of a YAG laser, a C0 laser, an excimer laser, a femtosecond laser, or the like.
- Processing may be performed with any laser, and a groove may be provided with a thin drill. Further, an elastomer sheet 41 provided with a groove 46 for reducing the transmission of force due to compression and tension between the adjacent ends of the elastomer that is generated between adjacent terminal portions may be formed.
- each terminal portion is adjusted by adjusting the dimensions (groove depth, groove width, area surrounded by the groove, etc.) of the groove 46 provided on the periphery of the terminal portion formation region. Desired load-displacement characteristics can be obtained, and when a load is applied to each terminal part, the influence of the load on the terminal part contacting P can be minimized.
- a socket structure for an IC of an LGA package can be realized in the same manner as the sockets of the second and third embodiments described above, When the terminal part is convex like the BGA package, this convex part 44 may not be provided.
- FIG. 7 and 8 are views showing a fifth embodiment of the socket of the present invention
- FIG. 7 is a plan view of the socket 50 of the present embodiment
- the socket 50 according to the present embodiment includes an insulating elastomer sheet 51 provided with a through-hole and a U-shaped groove 56 provided along the periphery of the terminal portion formation region, and the elastomer sheet 51. It has a metal circuit 52 provided in the front and back terminal area and a through hole 53 formed by forming a metal film on the inner wall of the through hole, and a metal circuit 52 on the front side of the elastomer sheet 51.
- the metal circuit 52 includes the second circuit described above.
- a convex portion 54 similar to the convex portion in the third embodiment is provided, and a metal fitting 55 is provided on the metal circuit 52 including the convex portion 54.
- An elastomer sheet used as a substrate or an elastic body generally has a large coefficient of thermal expansion.
- heat from the CPU is also transmitted to the socket.
- an elastomer sheet as a base material, the expansion and contraction of the elastomer is taken into account. Clearance needs to be designed.
- the socket 50 according to the present embodiment is an application example of the present invention in view of the above-described problems.
- An insulating elastomer sheet 51 is used as a base material, a small-diameter through hole is formed in the base material, and the elastomer as the base material is used.
- a circuit was formed on the necessary part of the surface of one sheet 51, and a metal film was attached to the inner wall of the through hole by a technique such as fitting or vapor deposition, so that the front surface and the back surface were made conductive and formed on the inner wall of this through hole 53.
- the metal film is at least partially in contact with the metal circuit 52 formed on the front and back surfaces, the surface force of the elastomer sheet 51 used as a base material, and at least one of the back surfaces,
- the protective layer 57 which has a material strength smaller than that of the elastomer, is stacked to reduce the heat generated by the CPU and heat in the manufacturing process.
- the thermal expansion coefficient of an IC package or printed circuit board having a smaller thermal expansion coefficient than that of an elastomer such as glass fiber glass epoxy resin, polyimide sheet, or the like. A close material is desirable.
- the socket 50 of the present embodiment has the above-described structure, the thermal expansion of the elastomer sheet 51 as a base material is suppressed even when the temperature rises due to heat generation of the CPU or the like. Therefore, it is possible to design to reduce the clearance of each terminal part, and as a result, a narrow pitch socket structure can be realized.
- the socket 50 of the present embodiment can be manufactured in the same manner as the sockets of the first to fourth embodiments described above except that the protective layer 57 is laminated.
- the protective layer 57 is laminated with an adhesive-coated polyimide glass epoxy resin on the elastomer sheet 51, heated, Stacking force can be increased by applying pressure. At this time, when the protective layer 57 is pressed, it is necessary to press uniformly, so it is necessary to pay sufficient attention. In addition, the elastomer sheet 51 may become Care must be taken not to lose power.
- the socket structure for the IC of the LGA package is realized by using a dedicated heating and pressure jig even for the socket for the LGA package in which the convex part 54 is provided on the metal circuit 52. can do. Also, as a matter of course, an IC socket structure for a BGA package in which the convex portion 54 is not provided on the metal circuit 52 can be realized.
- FIGS. 9 and 10 are views showing a sixth embodiment of the socket of the present invention
- FIG. 9 is a plan view of the socket 60 of the present embodiment
- FIG. 10 is a side sectional view of an essential part.
- the socket 60 of this embodiment is formed by laminating an elastomer layer 61B on both the front and back surfaces of a core material 61A made of a material having a smaller thermal expansion coefficient than that of an elastomer, provided with through holes for forming through holes, and terminals.
- Insulating elastomer sheet 61 provided with a U-shaped groove 56 along the periphery of the part forming region, metal circuit 62 provided on the front and back surfaces of the elastomer sheet 61, and metal on the inner wall of the through hole
- the metal circuit 62 on the front surface side of the elastomer sheet 61 and the metal circuit on the back surface side of the elastomer sheet 61 are electrically connected by the through hole 63.
- the metal circuit 62 is provided with a convex portion 64 similar to the convex portion in the second and third embodiments described above, and a metal fitting 65 is provided on the metal circuit 62 including the convex portion 64. ing.
- a sheet-like core 61 A made of a material having a smaller coefficient of thermal expansion than that of the elastomer is sandwiched in advance in an elastomer sheet 61 used as a base material.
- the core structure 61 A is molded to reduce the heat generated by the CPU and the manufacturing process.
- the material with a low thermal expansion coefficient that composes the core material 61 A includes the thermal expansion coefficient of IC packages and printed circuit boards that have a lower thermal expansion coefficient than that of elastomer, such as glass fiber, glass epoxy resin, and polyimide as described above. A close material is desirable.
- the socket 60 of the present embodiment can be manufactured in the same manner as the sockets of the first to fourth embodiments described above, except that the elastomer sheet 61 containing the core material 61A is used.
- the starting material for such a socket structure is as shown in FIG.
- the convex portion 64 is formed on the elastomer sheet 61 because of the IC socket for the LGA package. It is provided. Then, a through-hole serving as a through-hole is provided in such an elastomer sheet 61 with a drill or a laser.
- the subsequent manufacturing method is the same as that of the sockets of the first to fourth embodiments described above.
- the socket 60 of the present embodiment has the structure as described above, the thermal expansion of the elastomer sheet 61 as a base material due to the heat generation of the CPU is suppressed, so that the clearance of each terminal portion is reduced. As a result, a narrow pitch socket structure can be realized.
- the core material 61A having a small thermal expansion coefficient is sandwiched between the elastomer sheets 61, as described in the fifth embodiment, when a material having a low thermal expansion coefficient is pasted together, Therefore, it is not necessary to pay attention to uniform pressurization or to ooze out the adhesive when adhering to a material with a low thermal expansion coefficient, so an improvement in yield can be expected.
- FIG. 12 is a view showing a seventh embodiment of the socket of the present invention, in which (a) is a step of laminating copper foil 71 on both front and back surfaces of an elastomer sheet 70, and (b) is an elastomer in which copper foil 71 is laminated. A process of drilling a through hole 72 to be a through hole 74 in a sheet 70. (c) is a process of forming a metal film 73 on the surface of the copper foil 71 and the inner wall of the through hole by attaching the through hole 72. The process of forming the hole 74 is shown.
- the present embodiment relates to a simple method for manufacturing a socket according to the present invention.
- the copper foil 71 with adhesive is superimposed on both the front and back surfaces of the insulating elastomer sheet 70, and then this is pressed while heating, so that it is applied to both the front and back surfaces of the elastomer sheet 70.
- a copper foil 71 is laminated (see step (a)).
- a through-hole 72 for forming a through-hole is formed in the elastomer sheet 70 with the copper foil 71 by laser processing with a drill force (see step (b)).
- a through hole 74 is formed by electrolytic plating.
- the metal film 73 on the front surface and the back surface is characterized by having at least one circuit forming portion connected to the interlayer conductive portion. DPP (Direct Plating Proc ess) can be applied. In this case as well, if the plating is difficult to adhere, the surface can be roughened by sandblasting or plasma asher that can be activated, so that the plating can be easily applied.
- DPP Direct Plating Proc ess
- the copper foil 71 and the metal film 73 laminated on the front and back surfaces of the elastomer sheet 70 are appropriately cut by etching or laser caching to form a circuit, thereby obtaining the socket structure of the present invention.
- the socket according to the present invention By manufacturing the socket according to the present invention in this way, it is possible to produce a thick plating in a short time as compared with the case where through holes are formed by electroless plating or vapor deposition, so that a large throughput can be expected. .
- FIG. 13A and 13B are views showing an eighth embodiment of the socket of the present invention.
- FIG. 13A is a plan view of the socket 80
- FIG. 13B is a cross-sectional view taken along the line AA ′ in FIG. 13A.
- the socket 80 of this embodiment has a large number of terminal portions 83 provided on the front and back surfaces of a laster sheet 81 in which an elastomer layer 81B made of a fluorine-based elastomer is laminated on both surfaces of a core material 81A.
- the corresponding terminal portion 83 is electrically connected by the through-hole fitting portion 84, and the rigid dome portion 82 (convex portion) protruding in a dome shape on the side of the terminal portion 83 facing the through-hole fitting portion 84 is provided. ), And the portion of the terminal portion 83 of the elastomer sheet 81 is high, and the portion other than the terminal portion 83 is low, and the space between the terminal portions 83 is a recess (groove). .
- the terminal portion 83 is formed of copper plating or copper foil, and the dome portion 82 is gold plated. Note that the gold plating can also be applied to the terminal portion 83 and the through hole plating portion 84 if necessary.
- the dome portion 82 has an error as shown in FIG. A portion of the sheeter 81 that contacts the dome portion 82 is pressed and deformed, so that the dome portion 82 itself has a rigidity that does not deform.
- the portion of the terminal portion 83 of the elastomer sheet 81 is high, and the portion other than the terminal portion 83 is low. 14B, the elastomer sheet 81 at the dome portion 82 and the terminal portion 83 is pressed and deformed, and can be smoothly released into the groove between the terminal portions 83, as shown in FIG. 14B.
- the force acting between adjacent terminal portions is reduced, the independent operation of each terminal portion 83 can be improved, and the connection of all the terminal portions 83 can be ensured when a load is applied.
- FIG. 14A and FIG. 14B are diagrams showing an external operation when the socket 80 is used as a socket for an IC of the LGA package 24 as an example of a semiconductor device using the socket 80 of the present embodiment.
- 14A is a side cross-sectional view showing a state before the pressing force is applied to the semiconductor device 85 (or a restored state after applying the pressing force)
- 14B is a side cross-sectional view showing a state when a load is applied to the semiconductor device 85.
- FIG. 14A is a side cross-sectional view showing a state before the pressing force is applied to the semiconductor device 85 (or a restored state after applying the pressing force)
- 14B is a side cross-sectional view showing a state when a load is applied to the semiconductor device 85.
- the semiconductor device 85 of this example is placed between the printed circuit board 23 and the LGA package 24, and as shown in FIG. 14A, the pattern wiring 23A and the lower surface of the LGA package 24 provided on the upper surface of the printed circuit board 23. Set so that the dome part 82 of the socket 80 is in contact with the LGA land 24A on the side.
- each terminal part 83 sinks around the through hole as a fulcrum, so when a load is applied, it moves to the contact point force S through hole side, and this moves the contact position of the dome part 82, thereby wiping effect. Since the oxide film on each metal contact surface can be removed and the fresh metal surfaces can be brought into contact with each other, the contact can be realized with low resistance.
- FIG. 15 is a process diagram showing an example of a method for manufacturing a socket according to the present embodiment.
- a thermal expansion suppression sheet core 81A
- TH through holes
- this sheet is set in an elastomer molding die, and an elastomer sheet 81 is produced by laminating an elastomer layer 81B, which is a fluorine-based elastomer, on both sides of the sheet.
- the projections and through-holes for the through holes are also formed at the same time as the terminal portions 83 and the dome portions 82.
- electroless copper plating or electroless Ni plating is applied to both the front and back surfaces of the obtained elastomer sheet to form a conductive plating base layer.
- This staking process also serves as a squeeze for through-holes and convex parts.
- electrolytic copper plating is applied on the base layer to secure the necessary metal terminal thickness for the terminal portion 83.
- FIG. 16A and 16B are views showing a ninth embodiment of the socket of the present invention.
- FIG. 16A is a plan view of the socket 90
- FIG. 16B is a cross-sectional view taken along the line AA ′ in FIG. 16A.
- a large number of terminal portions 93 are provided on the front and back surfaces of a laster sheet 91 made of a fluorine-based elastomer, and the corresponding terminal portions 93 on the front and back surfaces are electrically connected by through-hole fitting portions 94.
- a rigid dome portion 92 (convex portion) protruding in a dome shape is provided on the side of the terminal portion 93 that faces the through hole fitting portion 94 of the terminal portion 93, and the through portion of the terminal portion 93 of the elastomer sheet 91 is provided.
- a U slit 95 made of a U-shaped through hole is formed in the edge except for the vicinity of the hole fitting portion 94.
- the terminal portion 93 is formed of copper plating or copper foil, and the dome portion 92 is plated with gold. Note that the gold plating can be applied to the terminal portion 93 and the through-hole plating portion 94 if necessary.
- the dome 92 is deformed by pressing and deforming the portion of the elastomer sheet 91 that contacts the dome 92 as shown in FIG. 17B. It has rigidity that does not deform.
- the elastomer sheet 91 has a structure that does not use a thermal expansion suppression sheet (core material). Of course, a structure using a core material may be used. When using a core material, the U-slit 95 should not be a through hole, and only the core material should be left.
- the socket 90 of this embodiment is provided with a U slit 95 at the edge of the terminal portion 93 of the elastomer sheet 91, so that when a load is applied, as shown in FIG.
- the elastomer sheet 91 at the terminal portion 93 is pressed and deformed and can be smoothly released to the U slit 95, so that the force acting between adjacent terminal portions is reduced, and the independent operation of each terminal portion 93 is improved.
- the elastomer can escape into the groove, so that it can be driven with a low load for the same displacement, so there is an advantage that the total load can be reduced in a multi-pin socket. is there.
- FIG. 17A and FIG. 17B are diagrams showing an outer contour operation when the socket 90 is used as a socket for an IC of the LGA package 24 as an example of a semiconductor device using the socket 90 of the present embodiment.
- FIG. 17A is a side sectional view showing a state before the pressing force is applied to the semiconductor device 96 (or a restored state after the pressing force is applied)
- FIG. 17B is a side sectional view showing a state when a load is applied to the semiconductor device 96.
- FIG. 17A is a side sectional view showing a state before the pressing force is applied to the semiconductor device 96 (or a restored state after the pressing force is applied)
- FIG. 17B is a side sectional view showing a state when a load is applied to the semiconductor device 96.
- the semiconductor device 96 of this example is placed between the printed circuit board 23 and the LGA package 24, and as shown in FIG. 17A, the pattern wiring 23A and the lower surface of the LGA package 24 provided on the upper surface of the printed circuit board 23. Set so that the dome part 92 of the socket 80 is in contact with the LGA land 24A on the side.
- each terminal part 93 sinks around the through hole as a fulcrum, so when a load is applied, it moves to the contact point force S through hole side, and this moves the contact position of the dome part 92, thereby wiping effect. Since the oxide film on each metal contact surface can be removed and the fresh metal surfaces can be brought into contact with each other, the contact can be realized with low resistance.
- FIG. 18 is a process diagram showing an example of a method for manufacturing a socket according to the present embodiment.
- an elastomer sheet 91 is produced by molding a fluorine-based elastomer.
- a projecting portion that becomes the dome portion 92 and a through hole for a through hole (TH) are formed.
- electroless copper plating or electroless Ni plating is applied to both the front and back surfaces of the obtained elastomer sheet 91 to form a conductive plating base layer.
- This staking process also serves as the staking of the through-hole plating part and convex part.
- electrolytic copper plating is applied on the base layer to secure the necessary metal terminal thickness for the terminal portion 93.
- the socket 90 shown in FIGS. 16A and 16B is manufactured.
- the present invention it is possible to provide a socket having an excellent contact terminal portion that can cope with low resistance, large current, and high speed, and a semiconductor device using the socket.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Connecting Device With Holders (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/304,680 US8137113B2 (en) | 2006-06-12 | 2007-06-07 | Socket, method for manufacturing socket, and semiconductor device |
| CN2007800220828A CN101467312B (zh) | 2006-06-12 | 2007-06-07 | 插座及其制造方法和半导体器件 |
| KR1020087030167A KR101050269B1 (ko) | 2006-06-12 | 2007-06-07 | 소켓과 그 제조방법 및 반도체 장치 |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006162692 | 2006-06-12 | ||
| JP2006-162692 | 2006-06-12 | ||
| JP2007105724A JP2008021637A (ja) | 2006-06-12 | 2007-04-13 | ソケットとその製造方法及び半導体装置 |
| JP2007-105724 | 2007-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007145128A1 true WO2007145128A1 (ja) | 2007-12-21 |
Family
ID=38831643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/061539 Ceased WO2007145128A1 (ja) | 2006-06-12 | 2007-06-07 | ソケットとその製造方法及び半導体装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8137113B2 (ja) |
| JP (1) | JP2008021637A (ja) |
| KR (1) | KR101050269B1 (ja) |
| CN (1) | CN101467312B (ja) |
| TW (1) | TW200814447A (ja) |
| WO (1) | WO2007145128A1 (ja) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2099269A1 (en) * | 2008-03-07 | 2009-09-09 | Joinset Co. Ltd. | Solderable elastic electric contact terminal |
| WO2010018511A1 (en) * | 2008-08-14 | 2010-02-18 | Koninklijke Philips Electronics N.V. | Electrical device with contact assembly |
| JP2010287344A (ja) * | 2009-06-09 | 2010-12-24 | Japan Aviation Electronics Industry Ltd | コネクタ |
| JP5639897B2 (ja) * | 2009-01-15 | 2014-12-10 | ポリマテック・ジャパン株式会社 | コネクタ |
| CN109904705A (zh) * | 2017-12-07 | 2019-06-18 | 泰科电子(上海)有限公司 | 导电端子坯料条的制造方法和导电端子的制造方法 |
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| US8007286B1 (en) * | 2008-03-18 | 2011-08-30 | Metrospec Technology, Llc | Circuit boards interconnected by overlapping plated through holes portions |
| US11266014B2 (en) | 2008-02-14 | 2022-03-01 | Metrospec Technology, L.L.C. | LED lighting systems and method |
| US8851356B1 (en) | 2008-02-14 | 2014-10-07 | Metrospec Technology, L.L.C. | Flexible circuit board interconnection and methods |
| US10334735B2 (en) | 2008-02-14 | 2019-06-25 | Metrospec Technology, L.L.C. | LED lighting systems and methods |
| JP5325440B2 (ja) * | 2008-03-26 | 2013-10-23 | 株式会社フジクラ | 電子部品実装用基板及びその製造方法と、電子回路部品 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20090008475A (ko) | 2009-01-21 |
| CN101467312A (zh) | 2009-06-24 |
| JP2008021637A (ja) | 2008-01-31 |
| TW200814447A (en) | 2008-03-16 |
| KR101050269B1 (ko) | 2011-07-19 |
| CN101467312B (zh) | 2012-07-11 |
| US8137113B2 (en) | 2012-03-20 |
| US20090197437A1 (en) | 2009-08-06 |
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