WO2005059571A1 - 異方導電性コネクターおよび回路装置の検査方法 - Google Patents
異方導電性コネクターおよび回路装置の検査方法 Download PDFInfo
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- WO2005059571A1 WO2005059571A1 PCT/JP2004/018562 JP2004018562W WO2005059571A1 WO 2005059571 A1 WO2005059571 A1 WO 2005059571A1 JP 2004018562 W JP2004018562 W JP 2004018562W WO 2005059571 A1 WO2005059571 A1 WO 2005059571A1
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- circuit device
- anisotropic conductive
- electrode
- conductive connector
- inspected
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/073—Multiple probes
- G01R1/07307—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card
- G01R1/07364—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card with provisions for altering position, number or connection of probe tips; Adapting to differences in pitch
- G01R1/07378—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card with provisions for altering position, number or connection of probe tips; Adapting to differences in pitch using an intermediate adapter, e.g. space transformers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
Definitions
- the present invention relates to an anisotropic conductive connector used for inspection of a circuit device such as a semiconductor integrated circuit, and a circuit device inspection method using a circuit device inspection device provided with the anisotropic conductive connector. More specifically, the present invention relates to an anisotropic conductive connector which can be suitably used for testing a circuit device such as a semiconductor integrated circuit having a solder bump electrode, and a method of testing a circuit device such as a semiconductor integrated circuit having a solder bump electrode. About.
- An anisotropic conductive sheet has conductivity only in the thickness direction, or has a pressurized conductive portion that has conductivity only in the thickness direction when pressed in the thickness direction.
- the anisotropic conductive sheet can achieve a compact electrical connection without using means such as soldering or mechanical fitting, and absorbs mechanical shocks and strains to achieve a soft connection.
- electrical connections between circuit devices for example, It is widely used as an anisotropic conductive connector for achieving electrical connection between printed circuit boards and leadless chip carriers, liquid crystal panels, and the like.
- an electrode to be inspected formed on one surface of a circuit device to be inspected and a circuit board for inspection are inspected.
- an anisotropic conductive material is used as a connector between the electrode area of the circuit device and the test electrode area of the test circuit board. With a sheet in between.
- an anisotropic conductive sheet a sheet obtained by uniformly dispersing metal particles in an elastomer (for example, see Patent Document 1), and a conductive magnetic metal in an elastomer cannot be used.
- By uniformly dispersing many conductive path forming parts extending in the thickness direction and There are various types, such as one in which insulating portions are insulated from each other (for example, see Patent Document 2), one in which a step is formed between the surface of the conductive path forming portion and the insulating portion (for example, see Patent Document 3). Structures are known.
- conductive particles are contained in an insulating elastic polymer material in a state of being aligned so as to be arranged in the thickness direction. Thus, a conductive path is formed.
- Such an anisotropic conductive sheet is, for example, a molding material in which conductive particles having magnetism are contained in a polymer material forming material which is cured to become an elastic polymer material, is placed in a molding space of a mold. It can be manufactured by injecting to form a molding material layer, and applying a magnetic field to the molding material layer to perform a curing treatment.
- conductive particles for forming the conductive path forming portion those having a coating layer made of gold are usually used in order to obtain good conductivity.
- the electrode material (solder alloy) constituting the electrode to be inspected in the circuit device migrates to the coating layer of the conductive particles on the anisotropic conductive sheet. There is a problem that the conductivity of the conductive path forming portion is reduced as a result of the deterioration of the coating layer.
- a plurality of metal electrodes extending through an anisotropic conductive sheet and a flexible insulating sheet made of a resin material in a thickness direction thereof are provided.
- a jig for circuit device inspection is constituted by the sheet-like connector with The electrical connection with the circuit device to be inspected is achieved by bringing the electrode to be inspected into contact with the metal electrode body of the sheet-like connector of the jig for road device inspection and pressing it. (See, for example, Patent Document 4).
- the circuit device to be inspected has a low surface accuracy of the base, a low uniformity of the thickness of the base, or a large variation in the height of the test electrode, The metal electrode body of the sheet connector cannot be reliably brought into contact with all the test electrodes in the circuit device, and as a result, good electrical connection to the circuit device cannot be obtained.
- the thermal expansion coefficient of the elastic polymer material forming the anisotropic conductive sheet and the thermal expansion coefficient of the resin material forming the insulating sheet in the sheet-like connector are increased.
- the conventional anisotropic conductive sheet has the following problem.
- the anisotropic conductive sheet since the elastic polymer material forming the anisotropic conductive sheet, for example, silicone rubber, has adhesiveness at a high temperature, the anisotropic conductive sheet can be long under a high-temperature environment while being pressed by a circuit device. If left for a while, it will adhere to the circuit device, As a result, it is not possible to smoothly perform the operation of replacing a circuit device that has been inspected with a circuit device that has not been inspected, and as a result, the inspection efficiency of the circuit device decreases. In particular, when the anisotropic conductive sheet is adhered to the circuit device with a large strength, it is difficult to peel the anisotropic conductive sheet from the circuit device without damaging the anisotropic conductive sheet. The conductive sheet cannot be subjected to subsequent inspection.
- Patent Document 1 JP-A-51-93393
- Patent Document 2 JP-A-53-147772
- Patent Document 3 JP-A-61-250906
- Patent Document 4 JP-A-7-231019
- the present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a method in which even if a connection target electrode has a projecting shape, the connection target electrode is permanently pressed by pressure contact. It is an object of the present invention to provide an anisotropic conductive connector which suppresses the occurrence of deformation due to mechanical deformation and wear, and can obtain stable conductivity for a long period of time even when repeatedly pressed.
- a second object of the present invention in addition to the first object, even if the electrode to be tested is a solder bump electrode, for example, the electrode material is prevented or suppressed from migrating to the conductive particles, Stable conductivity is obtained over a period of time and the anisotropy that can prevent or suppress the adhesion to the circuit device even when it is used while being pressed against the circuit device in a high-temperature environment.
- An object of the present invention is to provide a conductive connector.
- a third object of the present invention is to provide a circuit device inspection method using a circuit device inspection device having the above-described anisotropic conductive connector.
- An anisotropic conductive connector includes an inspection circuit board having an inspection electrode arranged corresponding to an electrode to be inspected of a circuit device to be inspected, and a circuit to be inspected.
- a lubricant is applied to at least the surface in contact with the circuit device to be detected.
- the lubricant is preferably a metal salt of an alkyl sulfonic acid.
- the electrode to be inspected of the circuit device to be inspected and the inspection electrode of the inspection circuit board are electrically connected with an anisotropic conductive connector interposed therebetween.
- a method for detecting a circuit device that performs an electrical detection comprising:
- an anisotropically conductive connector with a lubricant applied to at least the surface in contact with the circuit device to be inspected the lubricant on the electrode to be inspected of the circuit device and the anisotropically conductive connector It is characterized by performing electrical inspection by contacting the surface coated with
- the test electrode of the circuit device to be detected is a solder protruding electrode.
- the lubricant is preferably a metal salt of an alkylsulfonic acid.
- the anisotropic conductive connector described above since the lubricant is applied to the surface of the circuit device under test, even if the electrode to be tested is a solder bump electrode, the anisotropic conductive connector The permanent deformation due to the pressure contact of the part in contact with the electrode to be tested and the deformation due to abrasion are suppressed, and the force and the electrode material of the electrode to be tested are also the conductive particles of the anisotropic conductive connector. Therefore, stable conductivity can be obtained over a long period of time, since the transition to is prevented or suppressed.
- the anisotropic conductive connector since the lubricant is applied to the surface of the circuit device to be inspected, even if the electrode to be inspected is a solder bump, the anisotropic conductive connector has Permanent deformation due to pressure contact of the part in contact with the test electrode and deformation due to wear are suppressed, and the force of the electrode material of the test electrode is transferred to the conductive particles of the anisotropic conductive connector. This is prevented or suppressed. As a result, the anisotropically conductive connector exhibits stable conductivity for a long period of time, and the number of replacements due to deterioration of the anisotropically conductive connector is reduced, thereby improving the inspection efficiency.
- FIG. 1 is a plan view showing an example of the anisotropic conductive connector of the present invention.
- FIG. 2 is a cross-sectional view of the anisotropic conductive connector shown in FIG. 1, taken along line AA.
- FIG. 3 is an explanatory sectional view showing a part of the anisotropic conductive connector shown in FIG. 1 in an enlarged manner.
- FIG. 4 is a plan view of a support in the anisotropic conductive connector shown in FIG. 1.
- FIG. 5 is a cross-sectional view of the support shown in FIG. 4, taken along line BB.
- FIG. 6 is an explanatory cross-sectional view showing a configuration of an example of a mold for forming an anisotropic conductive film.
- FIG. 7 is an explanatory cross-sectional view showing a state where a spacer and a support are arranged on a molding surface of a lower die.
- FIG. 8 is an explanatory cross-sectional view showing a state in which a first molding material layer is formed on a molding surface of an upper mold, and a second molding material layer is formed on a molding surface of a lower mold.
- FIG. 9 is an explanatory cross-sectional view showing a state where a first molding material layer and a second molding material layer are stacked.
- FIG. 10 is an explanatory cross-sectional view showing a state where an anisotropic conductive film is formed.
- FIG. 11 is an explanatory cross-sectional view showing a state where the formed anisotropic conductive film is taken out of a mold.
- FIG. 12 is an explanatory diagram showing a configuration of an example of a circuit device inspection apparatus according to the present invention, together with the circuit device.
- FIG. 13 is an explanatory diagram showing a configuration of an example of a circuit device inspection apparatus according to the present invention, together with other circuit devices.
- FIG. 14 is a plan view of a test circuit device used in the example.
- FIG. 15 is a side view of a test circuit device used in the example.
- FIG. 16 is an explanatory diagram showing a schematic configuration of an apparatus for performing a repeated durability test in an example.
- Anisotropic conductive connector A Anisotropic conductive film Conductive path forming part a Projecting part
- FIGS. 1, 2 and 3 are explanatory views showing the configuration of an example of the anisotropic conductive connector of the present invention.
- FIG. 1 is a plan view
- FIG. 2 is a cross-sectional view taken along line AA of FIG. Is a partially enlarged sectional view.
- the anisotropic conductive connector 10 is composed of a rectangular anisotropic conductive film 10A and a rectangular plate-like support 71 that supports the anisotropic conductive film 10A, and is formed in a sheet shape as a whole.
- a rectangular opening 73 having a size smaller than the anisotropic conductive film 10A is formed at the center of the support 71, and a positioning hole 72 is formed at each of the four corners. Is formed.
- the anisotropic conductive film 10A is disposed in the opening 73 of the support 71, and is supported by the support 71 by fixing the peripheral portion of the anisotropic conductive film 1OA to the support 71. I have.
- the anisotropic conductive film 10 A of the anisotropic conductive connector 10 has a plurality of columnar conductive path forming portions 11 extending in the thickness direction, and an insulating material that insulates the conductive path forming portions 11 from each other. And an insulating portion 15 made of an elastic polymer material.
- a portion of the anisotropic conductive film 10A where the conductive path forming portion 11 is formed contains conductive particles exhibiting magnetism (not shown).
- one of the plurality of conductive path forming portions 11 formed in a region other than the peripheral portion of the anisotropic conductive film 10A is a connection target electrode, for example, the circuit device 1 to be detected.
- the effective conductive path forming portion 12 electrically connected to the electrode to be inspected in the above-mentioned, and the one formed on the peripheral portion of the anisotropic conductive portion 1OA is an ineffective conductive path which is not electrically connected to the connection target electrode.
- the effective conductive path forming section 12 is arranged according to a pattern corresponding to the pattern of the connection target electrode.
- the insulating portions 15 are integrally formed so as to surround the individual conductive path forming portions 11. As a result, all the conductive path forming portions 11 are insulated from each other by the insulating portion 15.
- One surface of the anisotropic conductive film 10A is flat, and the surface of the portion forming the conductive path forming portion 11 protrudes from the surface of the portion forming the insulating portion 15 on the other surface.
- a protruding part 1 la is formed.
- a lubricant is applied to the plane-side surface of the anisotropic conductive film 10A, and a lubricant layer 40 is provided.
- the durometer A hardness of the elastic polymer material constituting the anisotropic conductive film 1OA is preferably 3070, more preferably 3565.
- Durometer ⁇ If the hardness is less than 30, repeated use will increase the electrical resistance of the conductive path forming part early, and it will be difficult to obtain high repetition durability.
- the elastic polymer material forming the anisotropic conductive film 10A a polymer material having a crosslinked structure is preferable.
- Various materials can be used as the curable polymer material forming material that can be used to obtain such an elastic polymer material, and specific examples thereof include polybutadiene rubber, natural rubber, and polyisoprene rubber.
- Conjugated rubbers such as styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, and hydrogenated products thereof; styrene-butadiene-gen block copolymer rubber, styrene-isoprene block copolymer rubber Block copolymer rubber such as chloroprene rubber, urethane rubber, polyester rubber, epichlorohydrin rubber, silicone rubber, ethylene-propylene copolymer rubber, ethylene-propylene-one copolymer Rubber and the like.
- the obtained anisotropic conductive connector 10 is required to have weather resistance, it is preferable to use a material other than the conjugated gen-based rubber, especially from the viewpoint of moldability and electrical characteristics. It is preferable to use rubber.
- the silicone rubber is preferably one obtained by crosslinking or condensing a liquid silicone rubber.
- the liquid silicone rubber preferably has a viscosity of 10-ec and a strain rate of 10 5 poise or less. Any of a condensation type, an addition type, and a type containing a bull group / hydroxyno group may be used. Specific examples thereof include dimethyl silicone raw rubber, methyl vinyl silicone raw rubber, methyl phenyl vinyl silicone raw rubber, and the like.
- the silicone rubber preferably has a molecular weight Mw (weight average molecular weight in terms of standard polystyrene; the same applies hereinafter) of 10,000, 40,000.
- Mw weight average molecular weight in terms of standard polystyrene; the same applies hereinafter
- Mn weight average molecular weight in terms of standard polystyrene; the same applies hereinafter
- the molecular weight distribution index Is preferably 2 or less.
- conductive particles contained in the conductive path forming portion 11 of the anisotropic conductive film 10 A can be used because the particles can be easily oriented by a method described later.
- conductive particles include particles of a magnetic metal such as iron, cobalt, nickel or the like, particles of an alloy thereof, particles containing these metals, or particles containing these metals as core particles.
- the surface of the core particles is coated with a metal having good conductivity such as gold, silver, palladium, and rhodium, or inorganic particles or polymer particles such as non-magnetic metal particles or glass beads are used as the core particles.
- a core particle having a surface coated with a conductive magnetic metal such as nickel or cobalt.
- nickel particles as core particles, whose surface is coated with gold having good conductivity.
- Means for coating the surface of the core particles with the conductive metal is not particularly limited, but for example, a chemical plating method, an electrolytic plating method, a sputtering method, a vapor deposition method and the like are used.
- the coverage of the conductive metal on the particle surface (core particle) is preferably 40% or more, more preferably 45% or more, and particularly preferably 4795%.
- the coating amount of the conductive metal is preferably 0.550% by mass of the core particles, more preferably 230% by mass, still more preferably 3 to 25% by mass, and particularly preferably 4 to 20% by mass. quality %.
- the amount of coating is gold, the amount of coating is
- the content is preferably 0.5 to 30% by mass, more preferably 2 to 20% by mass, and still more preferably 3 to 15% by mass.
- the particle diameter of the conductive particles is preferably from 1 to 100 zm, more preferably from 2 to 50 ⁇ , still more preferably from 3 to 30 zm, and particularly preferably from 4 to 20 ⁇ m. is there.
- the particle size distribution (Dw / Dn) of the conductive particles is preferably 1 to 10, more preferably 1.01 to 7, more preferably 1.05 to 5, and particularly preferably 1 to 5.
- One is four.
- the shape of the conductive particles is not particularly limited, but is spherical, star-shaped, or agglomerated because they can be easily dispersed in the polymer-forming material. It is preferably a secondary particle.
- a conductive particle whose surface is treated with a coupling agent such as a silane coupling agent or a lubricant can be used as appropriate.
- a coupling agent such as a silane coupling agent or a lubricant
- Such conductive particles are used at a ratio of preferably 5 to 60%, more preferably 7 to 50% in volume fraction with respect to the polymer substance forming material. If this ratio is less than 5%, the conductive path forming portion 11 having a sufficiently small electric resistance may not be obtained. On the other hand, if this ratio exceeds 60%, the obtained conductive path forming portion 11 is likely to be fragile, and the elasticity required for the conductive path forming portion 11 may not be obtained.
- the conductive particles used in the conductive path forming portion 11 preferably have a surface covered with gold, but an electrode to be connected, for example, an electrode to be inspected of a circuit device to be inspected is made of lead.
- the conductive particles are made of a solder alloy containing
- the conductive particles contained in the conductive path forming portion 11 on the side that comes into contact with the test electrode made of the solder alloy are made of a material such as mouth, palladium, and ruthenium. It is preferably coated with a diffusion-resistant metal selected from tungsten, molybdenum, platinum, iridium, silver and alloys containing these, so that the lead component diffuses into the coating layer of the conductive particles.
- the conductive particles having a surface coated with a diffusion-resistant metal may be applied to the surface of a core particle made of, for example, nickel, iron, cobalt, or an alloy thereof by, for example, chemical plating or electrolytic plating. It can be formed by coating with a diffusion-resistant metal by sputtering, vapor deposition, or the like.
- the coating of the conductive particles can be composed of a plurality of metal layers.
- the outermost layer is made of a diffusion-resistant metal such as rhodium, It is preferable that the coating layer is a layer made of gold having good conductivity.
- the coating amount of the diffusion-resistant metal is preferably 5 to 40%, more preferably 10 to 30% by mass fraction based on the conductive particles.
- support 71 as the material constituting the linear thermal expansion coefficient of use Les the following: 3 X 10- 5 ZK, preferably from Rukoto are preferably tool 2 X 10- 5 1 X 10- 6 / kappa, particularly preferably 6 X 10- 6 one 1 X 10- 6 / ⁇ .
- a metal material or a nonmetal material is used as a specific material.
- metal material gold, silver, copper, iron, nickel, cobalt, or an alloy thereof can be used.
- Non-metallic materials include resin materials with high mechanical strength such as polyimide resin, polyester resin, polyaramid resin, and polyamide resin, glass fiber reinforced epoxy resin, glass fiber reinforced polyester resin, and glass fiber reinforced polyimide resin.
- a composite resin material in which an inorganic material such as silica, alumina, boron nitride or the like is mixed as a filler in a resin material, an epoxy resin, or the like can be used.However, polyimide resin, glass fiber, or the like has a small coefficient of thermal expansion.
- a composite resin material such as a reinforced epoxy resin or an epoxy resin mixed with boron nitride as a filler is preferable.
- the lubricant applied to the surface of the anisotropically conductive connector includes a permanent deformation of the anisotropically conductive connector when the anisotropically conductive connector is pressed against an electrode to be inspected of a circuit device to be inspected.
- Various substances can be used as long as they suppress the migration of the electrode material and transfer of the electrode substance to the conductive particles of the anisotropic conductive connector.
- the lubricant include a fluororesin-based lubricant, boron nitride, silica, and zirconium.
- Lubricant mainly composed of inorganic materials such as nylon, silicon carbide and graphite; hydrocarbon release agents such as paraffin wax, metal soap, natural and synthetic paraffins, polyethylene waxes and fluorocarbons; stearic acid, hydroxy Fatty acid release agents such as higher fatty acids such as stearic acid and oxy fatty acids; fatty acid amide release agents such as stearamide and ethylenebisstearamide; and fatty acid amide release agents such as alkylenebisfatty acid amides; Aliphatic alcohols such as allyl alcohol and cetyl alcohol, polyhydric alcohols, alcoholic release agents such as polydalicol and polyglycerols; lower fatty acid esters such as butyl stearate and pentaerythritol tetrastearate; and fatty acids Polyhydric
- the permanent deformation of the anisotropic conductive connector is suppressed and the anisotropic conductive material of the electrode material is prevented.
- Alkylsulfonate metal salts are used to suppress migration of conductive connectors into conductive particles and to minimize the adverse effects such as contamination of the inspection electrodes of the circuit device to be inspected, especially when used at high temperatures. preferable.
- an alkali metal salt is preferred. Specific examples thereof include sodium 1-decanesulfonate, sodium 1-decanecanesulfonate, and 1-dodecanesulfonate.
- sodium salts are particularly preferred because of their excellent heat resistance.
- One of these compounds may be used alone, or two or more may be used in combination.
- the circuit device to be inspected does not adhere to the anisotropically conductive connector at the time of inspection, and the amount of the lubricant to be inspected of the circuit device to be inspected. Any amount may be used as long as it adheres to the electrode and does not affect use after inspection.
- a known method such as spraying, application with a brush, dripping of the solution on the application surface, ripping the anisotropic conductive connector into the solution, or the like. Can be used.
- a method of diluting a lubricant with a solvent such as alcohol, applying the diluted solution to the surface of the conductive particles, and evaporating the solvent can be used as appropriate. According to this, the lubricant can be uniformly applied to the surface of the conductive particles.
- the anisotropic conductive connector For the lubricant in solid powder state at room temperature, an appropriate amount is placed on the application surface of the anisotropic conductive connector, and the anisotropic conductive connector is heated to a high temperature to melt the lubricant and apply it to the surface. Methods can also be used.
- Such an anisotropic conductive connector 10 can be manufactured, for example, as follows.
- Fig. 6 shows an example of a mold used for manufacturing the anisotropic conductive connector of the present invention. It is explanatory sectional drawing for showing a structure.
- This mold is configured such that an upper mold 50 and a lower mold 55 which is a pair with the upper mold 50 are arranged so as to face each other, and the molding surface of the upper mold 50 (the lower surface in FIG. 6) and the molding surface of the lower mold 55 (the lower mold 55).
- a molding space 59 is formed between the molding space 59 and the upper surface in FIG.
- the target (the lower surface in FIG. 6) of the ferromagnetic substrate 51
- a ferromagnetic layer 52 is formed in accordance with an arrangement pattern corresponding to the pattern of the conductive path forming portion 11 in the anisotropic conductive connector 10.
- a non-magnetic layer 53 having substantially the same thickness as the thickness is formed.
- the surface (the upper surface in FIG. 6) of the ferromagnetic substrate 56 is formed on the surface of the ferromagnetic substrate 56 according to the pattern corresponding to the pattern of the conductive path forming portion 11 in the target anisotropic conductive connector 10.
- a ferromagnetic layer 57 is formed, and a non-magnetic layer 58 having a thickness larger than the thickness of the ferromagnetic layer 57 is formed in a portion other than the ferromagnetic layer 57.
- a step is formed between the lower mold 55 and the ferromagnetic layer 57, so that a concave space 57a for forming the protruding portion 11a is formed on the molding surface of the lower mold 55.
- Ferromagnetic substrates 51 and 56 in each of the upper die 50 and the lower die 55 may be made of a ferromagnetic metal such as iron, iron-nickel alloy, iron-cobalt alloy, nickel, and cobalt. Can be.
- the ferromagnetic substrates 51 and 56 preferably have a thickness of 0.1 to 50 mm and have a smooth surface, are chemically degreased, and are mechanically polished. But preferred.
- the material forming the ferromagnetic layers 52 and 57 in each of the upper mold 50 and the lower mold 55 includes a ferromagnetic metal such as iron, an iron-nickel alloy, an iron-cobalt alloy, nickel, and cobalt. Can be used. It is preferable that the ferromagnetic layers 52 and 57 have a thickness of 10 ⁇ or more. If the thickness is less than 10 ⁇ , it becomes difficult to apply a magnetic field having a sufficient intensity distribution to the molding material layer formed in the mold. Since it is difficult to aggregate the conductive particles at a high density in a portion to be the conductive path forming portion 11, a good anisotropic conductive connector may not be obtained.
- a nonmagnetic metal such as copper, a heat-resistant polymer substance, or the like may be used.
- a non-magnetic material layer 53, 58 can be easily formed by a photolithography technique, it is preferable to use a polymer material cured by radiation.
- Acrylic dry film resist, epoxy liquid resist, polyimide A photoresist such as a liquid-based liquid resist can be used.
- the thickness of the nonmagnetic layer 58 in the lower mold 55 is set according to the height of the protrusion 11a to be formed and the thickness of the ferromagnetic layer 57.
- an anisotropic conductive connector 10 is manufactured as follows. First, as shown in FIG. 7, frame-shaped spacers 54a and 54b, and FIGS. A support 71 having an opening 73 and a positioning hole 72 as shown in FIG. 5 is prepared, and the support 71 is fixed to a predetermined position of the lower die 55 via a frame-shaped spacer 54b. And a frame-shaped spacer 54a on the upper die 50.
- paste-like molding materials are prepared by dispersing conductive particles exhibiting magnetism in a curable polymer substance forming material.
- the first molding material layer 61a is formed by filling the molding material into the space formed by the spacer 54a on the molding surface of the upper mold 50, while forming the first molding material layer 61a.
- the second molding material layer 6 lb is formed by filling the molding material into the space formed by the lower mold 55, the spacer 54b and the support 71.
- the first molding material layer 61a is laminated on the second molding material layer 61b by positioning the upper die 50 on the support 71.
- a parallel magnetic field having an intensity distribution is obtained. That is, a parallel magnetic field having a large intensity is applied between the ferromagnetic layer 52 of the upper mold 50 and the corresponding ferromagnetic layer 57 of the lower mold 55 by the first molding material layer 61a and the second molding material layer. Act in the thickness direction of 61b.
- the conductive particles dispersed in each molding material layer are separated from the respective ferromagnetic layers 52 of the upper mold 50 by this. They are gathered at a portion to be the conductive path forming portion 11 located between the corresponding lower die 55 and the ferromagnetic layer 57 and are oriented so as to be arranged in the thickness direction of each forming material layer.
- each molding material layer by subjecting each molding material layer to a curing treatment, as shown in Fig. 10, the conductive particles are densely arranged in a state where the conductive particles are aligned in the thickness direction in the elastic polymer material.
- the filled conductive path forming portion 11 and the insulating material made of an insulating elastic polymer material formed so as to surround the periphery of the conductive path forming portion 11 with no or almost no conductive particles.
- An anisotropic conductive film 1 OA having a portion 15 is formed.
- the molded anisotropic conductive connector is taken out of the mold to obtain an anisotropic conductive connector 101 having a structure shown in FIG. 11 and not coated with a lubricant.
- a lubricant is applied to one side (upper side in the figure) of this anisotropically conductive connector and a lubricant layer 40 is provided, whereby the anisotropically conductive connector 10 having the structure shown in FIGS. Is done.
- the curing treatment of each molding material layer can be performed after stopping the action of the parallel magnetic field and the force S that can be performed while the parallel magnetic field is still applied.
- the intensity of the parallel magnetic field applied to each molding material layer is preferably such that the average is 20,000,000,000,000,000,000,000 ⁇ .
- a permanent magnet can be used instead of an electromagnet.
- Permanent magnets made of alnico (Fe-A1-Ni-Co-based alloy), ferrite, etc. are preferred because they can provide a parallel magnetic field strength within the above range.
- each molding material layer is appropriately selected depending on the material to be used, but is usually performed by heat treatment.
- the specific heating temperature and heating time are appropriately selected in consideration of the type of the polymer substance forming material constituting the molding material layer, the time required for the movement of the conductive particles, and the like.
- FIG. 12 is an explanatory diagram schematically showing the configuration of an example of the circuit device inspection apparatus according to the present invention.
- the inspection device of this circuit device is provided with an inspection circuit board 5 having guide pins 9.
- the inspection electrode 6 is formed according to a pattern corresponding to the pattern of the hemispherical solder ball electrode 2 in the circuit device 1 to be inspected. Have been.
- An anisotropic conductive connector 10 having the configuration shown in FIGS. 1 to 3 is arranged on the surface of the detection circuit board 5. Specifically, the guide pin 9 is inserted into the positioning hole 72 (see FIGS. 1 and 3) formed in the support body 71 of the anisotropic conductive connector 10, whereby the anisotropic conductive connector 10 is anisotropically conductive. With the conductive path forming portion 11 of the conductive film 10A positioned so as to be positioned on the inspection electrode 6, the anisotropic conductive connector 10 is fixed on the surface of the inspection circuit board 5, and A lubricant is applied to the surface of the conductive film 10A on the side in contact with the circuit device 1, so that a lubricant layer 40 is formed.
- the circuit device 1 is arranged on the anisotropic conductive connector 10 so that the solder ball electrode 2 is located on the conductive path forming portion 11.
- the circuit device 1 is arranged on the anisotropic conductive connector 10 so that the solder ball electrode 2 is located on the conductive path forming portion 11.
- each of the conductive path forming portions 11 in the anisotropic conductive connector 10 is sandwiched between the solder ball electrode 2 and the inspection electrode 6.
- Inspection of device 1 is performed.
- the anisotropic conductive connector 10 coated with a lubricant is provided on the side of the anisotropic conductive film 10A which contacts the circuit device, the electrode to be inspected is Even in the case of the protruding solder ball electrode 2, permanent deformation or deformation due to wear is suppressed in the anisotropic conductive film 10 ⁇ / b> A due to the press-contact of the electrode to be inspected, and the electrode of the solder ball electrode 2 is prevented. Since the transfer of the substance to the conductive particles is prevented or suppressed, stable conductivity can be obtained for a long period of time even when a large number of circuit devices 1 are continuously tested.
- the anisotropic conductive connector 10 is used in a high temperature environment while being pressed against the circuit device 1, it is possible to prevent or suppress the anisotropic conductive connector 10 from adhering to the circuit device 1. it can.
- the anisotropically conductive connector 10 suppresses permanent deformation due to pressure contact with the electrode to be tested and deformation due to wear, the anisotropically conductive connector 10 has a structure other than the anisotropically conductive connector 10.
- the electrical inspection of the circuit device can be performed without using the sheet connector.
- the sheet-like connector is not used, it is not necessary to align the anisotropically conductive connector 10 with the sheet-like connector, and there is a problem of misalignment between the sheet-like connector and the anisotropically conductive connector 10 due to a temperature change. Can be avoided, and the inspection device Easy to configure.
- the electrode to be inspected of the circuit device to be inspected is not limited to a hemispherical solder ball electrode. It may be a lead electrode or a plate-like electrode.
- anisotropic conductive connector It is not essential to provide a support for the anisotropic conductive connector, but it may be composed of only an anisotropic conductive film.
- the anisotropic conductive film may be integrally bonded to the inspection circuit board. According to such a configuration, the displacement between the anisotropic conductive film and the inspection circuit board can be reliably prevented.
- Such an anisotropic conductive connector is a mold for manufacturing an anisotropic conductive connector, which has a board placement space area in which a test circuit board 5 can be placed in a molding space.
- the test circuit board is placed in the space for board placement in the molding space of the mold, and in this state, for example, the molding material is injected into the molding space and cured to perform manufacturing. I can do it.
- the lubricant may be applied to both surfaces of the anisotropic conductive connector.
- Lubricant is applied only to the side of the conductive circuit of the anisotropically conductive connector that contacts the circuit device, so that it can be applied to the inspection circuit board as well. Can be improved.
- the conductive path forming portions are arranged at a constant pitch, and an effective conductive path in which some of the conductive path forming portions are electrically connected to the electrode to be inspected.
- the other conductive path forming part may be an ineffective conductive path forming part that is not electrically connected to the electrode to be inspected.
- the circuit device 1 to be detected is a fixed device such as a CSP (Chip Scale Package) or a TSOP (Thin Small Outline Package). Solder balls that are electrodes to be tested only at some of the grid points of the pitch There is a configuration in which the electrodes 2 are arranged.
- the conductive path forming portion 11 has a grid having substantially the same pitch as the electrodes to be tested.
- the conductive path forming portion 11 arranged according to the point position and located at a position corresponding to the electrode to be inspected is set as an effective conductive path forming portion, and the other conductive path forming portions 11 are set as invalid conductive path forming portions.
- the anisotropic conductive connector 10 having such a configuration, in the manufacture of the anisotropic conductive connector 10, the ferromagnetic layers of the mold are arranged at a constant pitch, so that the molding material When a magnetic field is applied to the layer, the conductive particles can be efficiently gathered and oriented at predetermined positions, and thereby, the density of the conductive particles is uniform in each of the obtained conductive path forming portions. Therefore, it is possible to obtain an anisotropic conductive connector having a small difference in resistance between the conductive path forming portions.
- the anisotropic conductive connector of the present invention may contain a reinforcing material.
- a mesh or nonwoven fabric can be suitably used as a strong reinforcing material.
- the deformation of the conductive path forming portion is further suppressed even if the conductive member is repeatedly pressed by the connection target electrode. Conductivity is obtained.
- organic fibers As the mesh or the nonwoven fabric constituting the reinforcing material, those formed of organic fibers can be suitably used.
- strong organic fibers include fluororesin fibers such as polytetrafluoroethylene fibers, aramide fibers, polyethylene fibers, polyarylate fibers, nylon fibers, polyester fibers, and liquid crystal polymer fibers.
- the organic fibers one whose coefficient of linear thermal expansion was equal to or approximates a linear thermal Rise expansion coefficient of the material forming the connection object, specifically, a coefficient of linear thermal expansion 3 X 10- 5 5 X 1 0_ 6 ZK, particularly IX 10- 5 - the use of what is 3 X 10- 6 / ⁇ , since the thermal expansion of the different Hoshirubeden film is suppressed, and subjected to thermal hysteresis by temperature change Also in this case, it is possible to stably maintain a good electrical connection state to the connection target.
- the anisotropic conductive film may have a form in which conductive particles are dispersed in a plane direction and oriented in a thickness direction without having a conductive path forming portion and an insulating portion.
- Such an anisotropic conductive film can be manufactured by a method disclosed in Japanese Patent Application Publication No. 2003-77560.
- the addition-type liquid silicone rubber is a two-pack type having a viscosity of Liquid A of 500 Pa's and a viscosity of Liquid B of 500 Pa's, and is a compressed product of a cured product.
- the viscosity at 23 ⁇ 2 ° C was measured by a B-type viscometer.
- the liquid A and the liquid B in the two-part addition-type liquid silicone rubber were stirred and mixed at an equal ratio.
- the mixture is poured into a mold, and the mixture is subjected to a defoaming treatment under reduced pressure, and then a curing treatment is performed at 120 ° C. for 30 minutes to have a thickness of 12.7 mm and a diameter of 12.7 mm.
- a cylindrical body made of a 29 mm silicone rubber cured product was prepared, and post-curing was performed on the cylindrical body at 200 ° C. for 4 hours.
- the compression set at 150 ⁇ 2 ° C was measured in accordance with JIS K 6249.
- the support (71) is made of SUS304, has a thickness of 0.1 mm, has an opening (73) of 17 mm ⁇ 10 mm, and has positioning holes (72) at four corners.
- the ferromagnetic substrates (51, 56) are made of iron and have a thickness of 6 mm.
- the ferromagnetic layers (52, 57) of each of the upper mold (50) and the lower mold (55) are made of nickel, have a diameter of 0.45 mm (circle), a thickness of 0.1 mm, and an arrangement pitch (center-to-center). The distance) is 0.8 mm and the number of ferromagnetic layers is 288 (12 x 24).
- the non-magnetic material layer (53, 58) is a material obtained by curing a dry film resist.
- the non-magnetic material layer (53) of the upper mold (50) has a thickness of 0.1 mm and the lower mold (55) has The thickness of the nonmagnetic layer (58) is 0.15 mm.
- the vertical and horizontal dimensions of the molding space (59) formed by the mold are 20 mm X 13 mm.
- a first molding material is prepared by adding and mixing 60 parts by weight of conductive particles having an average particle diameter of 30 ⁇ m with 100 parts by weight of an addition-type liquid silicone rubber, followed by defoaming under reduced pressure. did.
- the conductive particles those obtained by applying gold plating to core particles made of nickel (average coating amount: 20% by weight of the weight of the core particles) were used.
- conductive particles having an average particle diameter of 30 xm are added to 100 parts by weight of the addition-type liquid silicone rubber, mixed, and then subjected to a defoaming treatment under reduced pressure, so that the second molding material is obtained.
- core particles made of nickel are used as the conductive particles.
- the gold-plated particles (average coating amount: 20% by weight of the core particles) were used.
- a 0.2-mm-thick spacer (54a) having an opening of 20 mm x 13 mm was formed on the molding surface of the upper mold (50) of the above mold and aligned and prepared.
- the first molding material layer (61a) having a thickness of 0.2 mm was formed by applying the molding material by screen printing.
- a spacer (54b) with a rectangular opening of 20 mm in length and width and 3 mm in thickness and a thickness of 0.2 mm formed.
- the support (71) is positioned and arranged on the spacer (54b), and the prepared molding material is applied by screen printing to form a lower mold (55).
- a second molding material layer (61b) having a thickness of 0.3 mm was formed in the space formed by the spacer (54b) and the support (71).
- the first molding material layer (61a) formed on the upper mold (50) and the second molding material layer (61b) formed on the lower mold (55) were aligned and overlapped.
- the anisotropic conductive film (10A) was formed by performing a curing treatment at 100 ° C. for 1 hour while applying a magnetic field.
- the anisotropic conductive connector (10) according to the present invention was manufactured.
- the anisotropic conductive film (10A) in the obtained anisotropic conductive connector (10) has a rectangular shape with vertical and horizontal dimensions of 3 ⁇ 40mm X 13mm, and has 288 (12 x 24) conductive path forming parts (11).
- the diameter of each conductive path forming part (11) is 0.45 mm, and the arrangement pitch (center distance) of the conductive path forming parts (11) is 0.8 mm.
- anisotropic conductive connector Al this anisotropic conductive connector is referred to as “anisotropic conductive connector Al”.
- 0.5 ml of a 0.5 wt% methanol solution of this sodium alkane sulfonate is anisotropically conductive.
- One conductive connector was obtained.
- anisotropic conductive connector Bl this anisotropic conductive connector is referred to as “anisotropic conductive connector Bl”.
- the performance of the anisotropic conductive connector B1 coated with the lubricant was evaluated as follows.
- a test circuit device (3) as shown in FIGS. 14 and 15 was prepared.
- This test circuit device (3) has a total of 72 solder ball electrodes (2) (material: lead-free solder) with a diameter of 0.4 mm and a height of 0.3 mm. Two electrode groups with 36 solder ball electrodes (2) are formed. In each electrode group, a total of 18 solder ball electrodes (2) are arranged in a straight line at a pitch of 0.8 mm. And two of these solder ball electrodes are electrically connected to each other by wiring (8) in the circuit device (3). The total number of wires in the circuit device (3) is 36.
- the anisotropic conductive connector was evaluated as follows.
- the guide pins (9) of the inspection circuit board (5) are inserted into the positioning holes of the support (71) of the anisotropically conductive connector (10), whereby the anisotropically conductive connector (10) is inserted.
- the connector (10) is positioned and arranged on the inspection circuit board (5), and the test circuit device (3) is arranged on the anisotropic conductive connector (10). It was fixed by a tool (not shown), and in this state, it was placed in a constant temperature f (7).
- the temperature in the thermostat (7) was set to 25 ° C, and a 1.2 kg load was applied to the test circuit device with a pressing jig, held for 20 seconds, and pressurized for 20 seconds. Then, a current of 500 mA for 0.1 second was applied 12 times, and the resistance value was measured at each current application.
- the measurement of the electric resistance value was performed as follows.
- the anisotropic conductive connector (10), the test circuit device (3) and the test electrode (6) of the test circuit board (5) and their wiring (not shown) were electrically connected to each other.
- a DC current of 10 mA is constantly applied between the external terminals (not shown) of the inspection circuit board (5) by a DC power supply (115) and a constant current control device (116), and the voltage is measured by a voltmeter (110).
- the voltage between the external terminals of the detection circuit board (5) during pressurization was measured.
- the electric resistance value R includes, in addition to the electric resistance values of the two conductive path forming portions, the electric resistance value between the electrodes of the test circuit device (3) and the external terminals of the test circuit board. The electrical resistance between the two is included.
- Electrode material to conductive particles Transition state The surface of the conductive path forming part was visually observed, and the case where little deformation occurred was evaluated as ⁇ , the case where minute deformation was recognized as ⁇ , and the case where large deformation was observed was evaluated as X. Electrode material to conductive particles Transition state:
- the color of the conductive particles in the conductive path forming portion was visually observed, and was evaluated as ⁇ when little discoloration was observed, ⁇ when slightly discolored to gray, and X when discolored almost to gray or black.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2004800377360A CN1894589A (zh) | 2003-12-18 | 2004-12-13 | 各向异性导电性连接器和电路装置的检查方法 |
KR1020057024556A KR100658012B1 (ko) | 2003-12-18 | 2004-12-13 | 이방 도전성 커넥터 및 회로 장치의 검사 방법 |
US10/582,782 US20070072313A1 (en) | 2003-12-18 | 2004-12-13 | Anisotropic conductive connector and circuit device inspection method |
EP04806923A EP1696241A4 (en) | 2003-12-18 | 2004-12-13 | ANISOTROPIC CONDUCTIVE CONNECTOR AND METHOD OF CONTROLLING A CIRCUIT DEVICE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-421675 | 2003-12-18 | ||
JP2003421675 | 2003-12-18 |
Publications (1)
Publication Number | Publication Date |
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WO2005059571A1 true WO2005059571A1 (ja) | 2005-06-30 |
Family
ID=34697315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018562 WO2005059571A1 (ja) | 2003-12-18 | 2004-12-13 | 異方導電性コネクターおよび回路装置の検査方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070072313A1 (ja) |
EP (1) | EP1696241A4 (ja) |
JP (1) | JP3675812B1 (ja) |
KR (1) | KR100658012B1 (ja) |
CN (1) | CN1894589A (ja) |
TW (1) | TW200527753A (ja) |
WO (1) | WO2005059571A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110662411A (zh) * | 2019-09-12 | 2020-01-07 | 西北核技术研究院 | 一种具有绝缘性能自恢复的电力电气设备及其使用方法 |
WO2021020501A1 (ja) * | 2019-07-30 | 2021-02-04 | 積水化学工業株式会社 | 導電性粒子及び接続構造体 |
Families Citing this family (9)
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JP2009019974A (ja) | 2007-07-11 | 2009-01-29 | Jsr Corp | 異方導電性コネクターの位置決め方法、およびこの異方導電性コネクターと検査用回路基板との位置決め方法、並びに異方導電性コネクター、およびプローブカード |
JP5057388B2 (ja) * | 2008-03-07 | 2012-10-24 | 日本航空電子工業株式会社 | コネクタ |
US8373269B1 (en) * | 2011-09-08 | 2013-02-12 | Taiwan Semiconductor Manufacturing Company, Ltd. | Jigs with controlled spacing for bonding dies onto package substrates |
US9572254B2 (en) | 2012-01-17 | 2017-02-14 | Xerox Corporation | Suspended lattice for electrical interconnects |
EP3552217A4 (en) * | 2016-12-07 | 2020-07-22 | Wafer LLC | LOW LOSS ELECTRICAL TRANSMISSION MECHANISM AND USER ANTENNA |
KR20180082754A (ko) * | 2017-01-11 | 2018-07-19 | (주)테크윙 | 테스트핸들러용 가압장치 |
US20220151069A1 (en) * | 2019-02-28 | 2022-05-12 | Mitsui Chemicals, Inc. | Anisotropic conductive sheet, electrical inspection apparatus, and electrical inspection method |
KR102175797B1 (ko) * | 2019-03-25 | 2020-11-06 | 주식회사 아이에스시 | 검사용 소켓 |
KR102466241B1 (ko) * | 2020-05-27 | 2022-11-14 | 주식회사 아이에스시 | 전기접속용 커넥터 |
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2004
- 2004-12-13 JP JP2004360355A patent/JP3675812B1/ja not_active Expired - Fee Related
- 2004-12-13 CN CNA2004800377360A patent/CN1894589A/zh active Pending
- 2004-12-13 KR KR1020057024556A patent/KR100658012B1/ko active IP Right Grant
- 2004-12-13 US US10/582,782 patent/US20070072313A1/en not_active Abandoned
- 2004-12-13 WO PCT/JP2004/018562 patent/WO2005059571A1/ja not_active Application Discontinuation
- 2004-12-13 EP EP04806923A patent/EP1696241A4/en not_active Withdrawn
- 2004-12-16 TW TW093139166A patent/TW200527753A/zh not_active IP Right Cessation
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Cited By (3)
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WO2021020501A1 (ja) * | 2019-07-30 | 2021-02-04 | 積水化学工業株式会社 | 導電性粒子及び接続構造体 |
CN110662411A (zh) * | 2019-09-12 | 2020-01-07 | 西北核技术研究院 | 一种具有绝缘性能自恢复的电力电气设备及其使用方法 |
CN110662411B (zh) * | 2019-09-12 | 2021-01-05 | 西北核技术研究院 | 一种具有绝缘性能自恢复的电力电气设备及其使用方法 |
Also Published As
Publication number | Publication date |
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KR100658012B1 (ko) | 2006-12-15 |
EP1696241A4 (en) | 2012-04-04 |
TWI330428B (ja) | 2010-09-11 |
JP2005201892A (ja) | 2005-07-28 |
EP1696241A1 (en) | 2006-08-30 |
US20070072313A1 (en) | 2007-03-29 |
JP3675812B1 (ja) | 2005-07-27 |
CN1894589A (zh) | 2007-01-10 |
TW200527753A (en) | 2005-08-16 |
KR20060030050A (ko) | 2006-04-07 |
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