WO2020105693A1 - 異方導電性シート、異方導電性複合シート、異方導電性シートセット、電気検査装置および電気検査方法 - Google Patents
異方導電性シート、異方導電性複合シート、異方導電性シートセット、電気検査装置および電気検査方法Info
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- WO2020105693A1 WO2020105693A1 PCT/JP2019/045532 JP2019045532W WO2020105693A1 WO 2020105693 A1 WO2020105693 A1 WO 2020105693A1 JP 2019045532 W JP2019045532 W JP 2019045532W WO 2020105693 A1 WO2020105693 A1 WO 2020105693A1
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- anisotropic conductive
- conductive sheet
- insulating layer
- sheet
- anisotropic
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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
- G01R1/07314—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 the body of the probe being perpendicular to test object, e.g. bed of nails or probe with bump contacts on a rigid support
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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
- G01R1/06711—Probe needles; Cantilever beams; "Bump" contacts; Replaceable probe pins
- G01R1/06755—Material aspects
- G01R1/06761—Material aspects related to layers
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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
- G01R1/0735—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 arranged on a flexible frame or film
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R3/00—Apparatus or processes specially adapted for the manufacture or maintenance of measuring instruments, e.g. of probe tips
-
- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2896—Testing of IC packages; Test features related to IC packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/16—Non-insulated conductors or conductive bodies characterised by their form comprising conductive material in insulating or poorly conductive material, e.g. conductive rubber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
Definitions
- the present disclosure relates to an anisotropic conductive sheet, an anisotropic conductive composite sheet, an anisotropic conductive sheet set, an electrical inspection device and an electrical inspection method.
- Anisotropic conductive sheet which has conductivity in the thickness direction and insulation in the plane direction.
- Such an anisotropic conductive sheet is used as a probe (contactor) of an electrical inspection device for measuring electrical characteristics between a plurality of measurement points of an inspection object such as a printed circuit board for various purposes. There is.
- an anisotropic conductive sheet used for electrical inspection for example, an anisotropic conductive sheet having an insulating layer and a plurality of metal pins arranged so as to penetrate in the thickness direction is known (for example, Patent Document 1). And 2).
- the metal pin is linearly formed along the thickness direction of the insulating layer.
- the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide an anisotropic conductive sheet, an electric inspection device, and an electric inspection method capable of suppressing damage to a terminal of an inspection target.
- the anisotropic conductive sheet of the present disclosure includes a plurality of conductive paths and an insulating layer that is arranged so as to fill the spaces between the plurality of conductive paths and has a first surface and a second surface.
- the path extends in the thickness direction of the insulating layer, and has a first end on the first surface side and a second end on the second surface side, and the path of the first end When the conductive path is seen through so that the center and the center of the second end portion overlap with each other, at least a part of the conductive path does not overlap with the first end portion and the second end portion.
- the anisotropic conductive composite sheet of the present disclosure has a plurality of first conductive paths penetrating in the thickness direction and a third surface and a fourth surface which are arranged so as to fill the spaces between the plurality of first conductive paths.
- a first anisotropic conductive sheet having a first insulating layer, a plurality of second conductive paths extending in a thickness direction, and a fifth surface arranged so as to fill a space between the plurality of second conductive paths.
- a second anisotropic conductive sheet having a second insulating layer having a sixth surface, wherein the first anisotropic conductive sheet and the second anisotropic conductive sheet are the first insulating layers.
- the third surface of the layer and the sixth surface of the second insulating layer are laminated so as to face each other, and at least one of the first anisotropic conductive sheet and the second anisotropic conductive sheet is a book.
- the center-to-center distance p2 of the plurality of second conductive paths on the fifth surface side is greater than the center-to-center distance p1 of the plurality of first conductive paths on the third surface side.
- the Rockwell hardness of the fifth surface of the second anisotropic conductive sheet is small and lower than the Rockwell hardness of the third surface of the first anisotropic conductive sheet.
- the anisotropic conductive sheet set of the present disclosure has a plurality of first conductive paths that penetrate in the thickness direction and a third surface and a fourth surface that are arranged so as to fill the spaces between the plurality of first conductive paths.
- a first anisotropic conductive sheet having a first insulating layer, a plurality of second conductive paths extending in a thickness direction, and a fifth surface arranged so as to fill a space between the plurality of second conductive paths.
- a second anisotropic conductive sheet having a second insulating layer having a sixth surface, wherein the first anisotropic conductive sheet and the second anisotropic conductive sheet are the first insulating layers.
- the third surface of the layer and the sixth surface of the second insulating layer are laminated so as to face each other, and at least the first anisotropic conductive sheet and the second anisotropic conductive sheet are formed.
- One is the anisotropic conductive sheet of the present disclosure, and the center-to-center distance p2 of the plurality of second conductive paths on the fifth surface side is the center of the plurality of first conductive paths on the third surface side. It is smaller than the distance p1 and the Rockwell hardness of the fifth surface of the second anisotropic conductive sheet is lower than the Rockwell hardness of the third surface of the first anisotropic conductive sheet.
- the electrical inspection apparatus of the present disclosure includes an inspection substrate having a plurality of electrodes, and an anisotropic conductive sheet of the present disclosure disposed on a surface of the inspection substrate on which the plurality of electrodes are disposed, An anisotropic conductive composite sheet, or a laminate of the anisotropic conductive sheet set of the present disclosure.
- the electrical inspection method of the present disclosure includes an inspection substrate having a plurality of electrodes and an inspection object having terminals, an anisotropic conductive sheet of the present disclosure, an anisotropic conductive composite sheet of the present disclosure, or A step of laminating via a laminate of an anisotropic conductive sheet set, and electrically connecting the electrode of the inspection substrate and the terminal of the inspection object through the anisotropic conductive sheet.
- an anisotropic conductive sheet an electric inspection device, and an electric inspection method capable of suppressing damage to a terminal of an inspection target.
- FIG. 1A is a plan view showing an anisotropic conductive sheet according to the first embodiment
- FIG. 1B is a sectional view taken along line 1B-1B in FIG. 1A
- 2A is an enlarged view of FIG. 1B
- FIG. 2B is a perspective view of FIG. 2A when the anisotropic conductive sheet is seen through in a plan view from the first surface side
- FIG. 3A is an enlarged cross-sectional view of the anisotropic conductive sheet for comparison
- FIG. 3B is a perspective view of the anisotropic conductive sheet in FIG. 3A when seen through from the first surface side
- 4A to 4C are schematic diagrams showing the steps of manufacturing the anisotropic conductive sheet according to the first embodiment.
- FIG. 1B is a sectional view taken along line 1B-1B in FIG. 1A
- 2A is an enlarged view of FIG. 1B
- FIG. 2B is a perspective view of FIG. 2A when the anisotropic conductive sheet is seen through
- FIG. 5 is a sectional view showing the electrical inspection device according to the first embodiment.
- FIG. 6A is a partially enlarged cross-sectional view of an anisotropic conductive sheet according to a modification, and FIG. 6B shows conductive paths such that the center of the first end and the center of the second end overlap with each other in FIG. 6A. It is a perspective view when seeing through. 7A to 7G are partial cross-sectional views showing an anisotropic conductive sheet according to a modified example.
- FIG. 8 is a sectional view of an anisotropic conductive sheet according to a modification.
- FIG. 9A is a partially enlarged view of a horizontal section of an anisotropic conductive sheet according to a modification, and FIG.
- FIG. 9B is a partially enlarged view of a vertical section of an anisotropic conductive sheet according to a modification.
- 10A to 10C are schematic views showing the manufacturing process of the anisotropic conductive sheet of FIG. 9B.
- 11A is a plan view showing the anisotropic conductive composite sheet according to the second embodiment
- FIG. 11B is a sectional view taken along line 11B-11B in FIG. 11A.
- FIG. 12 is a sectional view showing the anisotropic conductive sheet set according to the second embodiment.
- FIG. 13 is a cross-sectional view showing the electrical inspection device according to the second embodiment.
- 14A and 14B are diagrams showing an anisotropic conductive composite sheet according to a modified example.
- 15A to 15C are views showing an anisotropic conductive composite sheet according to a modified example.
- 16A to 16C are diagrams showing an anisotropic conductive sheet according to a modified example.
- 17A is a sectional view showing an anisotropic conductive composite sheet according to a modification
- FIG. 17B is a sectional view showing an anisotropic conductive sheet set according to a modification.
- Embodiment 1 [Anisotropic conductive sheet] 1A is a plan view showing an anisotropic conductive sheet 10 according to the first embodiment, and FIG. 1B is a sectional view taken along line 1B-1B in FIG. 1A.
- FIG. 2A is an enlarged view of FIG. 1B, and FIG. 2B is a perspective view of FIG. 2A when the anisotropic conductive sheet 10 is seen through in a plan view from the first surface 12a side.
- an anisotropic conductive sheet 10 is an insulating layer having a plurality of conductive paths 11 and a first surface 12a and a second surface 12b arranged so as to fill up between them. And 12 (see FIG. 1B).
- the inspection object is preferably arranged on the first surface 12a.
- the conductive path 11 extends in the thickness direction of the insulating layer 12 and has a first end 11a on the first surface 12a side and a second end 11b on the second surface side (see FIG. 1B). .. Specifically, the conductive path 11 penetrates in the thickness direction of the insulating layer 12, the first end 11a is exposed on the first surface 12a side, and the second end 11b is the second end. It is preferably exposed on the surface 12b side.
- the conductive path 11 extending in the thickness direction of the insulating layer 12 means that the direction connecting the first end portion 11a and the second end portion 11b of the conductive path 11 is the thickness of the insulating layer 12. It is almost parallel to the direction.
- substantially parallel means ⁇ 10 ° or less with respect to the thickness direction of the insulating layer 12.
- the first end 11a of the conductive path 11 When the first end 11a of the conductive path 11 is exposed on the first surface 12a side of the insulating layer 12, the first end 11a of the conductive path 11 is flush with the first surface 12a of the insulating layer 12.
- the insulating layer 12 may protrude from the first surface 12a of the insulating layer 12.
- the second end 11b of the conductive path 11 when the second end 11b of the conductive path 11 is exposed on the second surface 12b side of the insulating layer 12, the second end 11b of the conductive path 11 is flush with the second surface 12b of the insulating layer 12. It may be one, or may be projected from the second surface 12b of the insulating layer 12.
- the center-to-center distance (pitch) p of the first end portions 11a of the plurality of conductive paths 11 is not particularly limited and can be appropriately set according to the pitch of the terminals of the inspection object (see FIG. 1B). Since the pitch of HBM (High Bandwidth Memory) terminals as an inspection target is 55 ⁇ m and the pitch of PoP (Package on Package) terminals is 400 to 650 ⁇ m, the distance p between the centers of the plurality of conductive paths 11 is p. Can be, for example, 5 to 650 ⁇ m. Above all, from the viewpoint of eliminating the need for positioning the terminals of the inspection object (making the alignment free), the center-to-center distance p of the plurality of conductive paths 11 is more preferably 5 to 55 ⁇ m.
- the center-to-center distance p of the plurality of conductive paths 11 is the minimum value among the center-to-center distances of the first end portions 11 a of the plurality of conductive paths 11.
- the center of the first end 11a of the conductive path 11 is the center of gravity of the first end 11a.
- the center-to-center distance p of the first ends 11a of the plurality of conductive paths 11 and the center-to-center distance of the second ends 11b may be the same or different.
- the center-to-center distance p of the first end portions 11a of the plurality of conductive paths 11 and the center-to-center distance of the second end portions 11b are the same. Also called distance.
- the circle-equivalent diameter of the first end 11a of the conductive path 11 can adjust the center-to-center distance p of the first ends 11a of the plurality of conductive paths 11 within the above range, and can ensure electrical continuity with the terminals of the inspection object. It only has to be about.
- the equivalent circle diameter of the first end 11a of the conductive path 11 is preferably 2 to 20 ⁇ m, for example.
- the equivalent circle diameter of the first end 11a of the conductive path 11 refers to the equivalent circle diameter of the first end 11a of the conductive path 11 when viewed along the thickness direction of the insulating layer 12.
- the equivalent circle diameter of the first end 11a and the equivalent circle diameter of the second end 11b of the conductive path 11 may be the same or different.
- the equivalent circle diameter of the first end 11a and the equivalent circle diameter of the second end 11b of the conductive path 11 are the same, and these are also referred to as the equivalent circle diameter of the conductive path 11.
- the anisotropic conductive sheet 10 is seen through so that the center of the first end portion 11a and the center of the second end portion 11b overlap each other, the conductivity between the first end portion 11a and the second end portion 11b is reduced.
- At least a part of the path 11 (that is, at least a part of the conductive path 11 inside the anisotropically conductive sheet 10) is arranged so as not to overlap the first end 11a and the second end 11b. (See Figures 2A and B).
- At least a part of the conductive path 11 does not overlap the first end portion 11a and the second end portion 11b when seen through, and at least a part of the conductive path 11 is the first end portion when seen through. 11a and the second end 11b are separated (see FIG. 2B).
- the anisotropic conductive sheet 10 is viewed along a virtual straight line AA ′ that connects the center of the first end 11a and the center of the second end 11b (see FIG. 2A), At least a part of the conductive path 11 between the first end portion 11a and the second end portion 11b is not located on the virtual straight line AA ', but is arranged so as to deviate from the virtual straight line AA' (FIG. 2B (dotted line).
- the non-linear portion 11c is a portion (bent portion) where the conductive path 11 is not linear in a cross section along the thickness direction of the insulating layer 12.
- the shape of the non-linear portion 11c may be any shape as long as the non-linear portion 11c can exhibit elasticity like a spring in the thickness direction of the insulating layer 12, and is not particularly limited, but is, for example, a corrugated shape, a zigzag shape, or an arch shape. It is possible.
- the non-linear portion 11c has a zigzag shape.
- the conductive path 11 having the non-linear portion 11c having such a shape can exhibit elasticity like a spring in the thickness direction of the insulating layer 12. This absorbs or disperses the impact when the inspection object is placed on the surface of the anisotropic conductive sheet 10 and the force when pressed from above the inspection object to make an electrical connection. It is possible to prevent the object terminal from being damaged by contact with the first end 11 a of the conductive path 11 of the anisotropic conductive sheet 10.
- the non-linear portion 11c is arranged on at least a part of the conductive path 11.
- the non-linear portion 11c is arranged in at least a part of the conductive path 11 located on the first end 11a side with respect to the midpoint between the first end 11a and the second end 11b ( That is, it is preferable to be arranged on the first surface 12a side). It is easy to absorb the impact when the inspection object is arranged on the surface of the anisotropic conductive sheet 10, and the terminals of the inspection object are connected to the first end portion 11a of the conductive path 11 of the anisotropic conductive sheet 10. This is to prevent scratching due to contact.
- the non-linear portion 11c is arranged in the entire central portion of the conductive path 11 between the first end portion 11a and the second end portion 11b (see FIGS. 1B and 2A).
- the z-zag interval d (interval between adjacent peaks) and the height h of the non-linear portion 11c of the conductive path 11 are the height of the inspection target of the anisotropic conductive sheet 10.
- the z-zag interval d (interval between adjacent peaks) and the height h of the non-linear portion 11c of the conductive path 11 are the height of the inspection target of the anisotropic conductive sheet 10.
- the zigzag distance d (the distance between the peaks of adjacent peaks) of the non-linear portion 11c of the conductive path 11 is about 5 to 50% of the thickness of the insulating layer 12. (See FIG. 2A).
- the zigzag height h of the non-linear portion 11c of the conductive path 11 in the cross section along the thickness direction of the insulating layer 12 may be about 2 to 20% of the thickness of the insulating layer 12.
- the height h of the zigzag is a straight line connecting the apexes of two adjacent peaks and the bottom point of the valley formed between these two peaks and the bottom points of the two valleys formed on both sides of the line. (See FIG. 2A).
- the material forming the conductive path 11 is not particularly limited as long as it has conductivity.
- the volume resistance value of the material forming the conductive path 11 is preferably 1.0 ⁇ 10 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less, and 1.0 ⁇ 10 ⁇ 10 ⁇ 6 to 1.0 ⁇ 10 ⁇ 9. It is more preferably ⁇ ⁇ cm.
- the material forming the conductive path 11 may be any material as long as the volume resistance value satisfies the above range, and examples thereof include metal materials such as copper, gold, nickel, tin, iron or alloys thereof, carbon black and the like. Includes carbon materials. Above all, the material forming the conductive path 11 is preferably a metal material. That is, the conductive path 11 is preferably a metal wire made of a metal material.
- the metal wire may be composed of a single layer or a plurality of layers.
- the metal wire may have a multilayer structure of a copper alloy layer as a core material, a nickel or nickel alloy layer as an intermediate coating material, and a gold layer as an outermost surface coating material.
- the intermediate coating material it is possible to easily prevent the innermost diffusion of the outermost surface coating material into the core material.
- the insulating layer 12 is arranged so as to fill the spaces between the plurality of conductive paths 11 and insulates the plurality of conductive paths 11 from each other.
- Such an insulating layer 12 has a first surface 12a forming one surface of the anisotropic conductive sheet 10 and a second surface 12b forming the other surface.
- the insulating layer 12 may be composed of the first resin composition.
- the glass transition temperature of the first resin composition is preferably ⁇ 40 ° C. or lower, and more preferably ⁇ 50 ° C. or lower.
- the glass transition temperature of the first resin composition can be measured according to JIS K 7095: 2012.
- the storage elastic modulus at 25 ° C. of the first resin composition is preferably 1.0 ⁇ 10 7 Pa or less, and more preferably 1.0 ⁇ 10 5 to 9.0 ⁇ 10 6 Pa.
- the storage elastic modulus of the first resin composition can be measured in accordance with JIS K 7244-1: 1998 / ISO6721-1: 1994.
- the glass transition temperature and storage elastic modulus of the first resin composition can be adjusted by the type of elastomer contained in the resin composition and the amount of filler added. Further, the storage elastic modulus of the first resin composition can also be adjusted by the form of the resin composition (whether it is porous or not).
- the first resin composition is not particularly limited as long as it has an insulating property, but from the viewpoint of easily satisfying the glass transition temperature or the storage elastic modulus, a composition containing an elastomer (base polymer) and a crosslinking agent. (Hereinafter, also referred to as “first elastomer composition”) is preferably a cross-linked product.
- the elastomer examples include silicone rubber, urethane rubber (urethane polymer), acrylic rubber (acrylic polymer), ethylene-propylene-diene copolymer (EPDM), chloroprene rubber, styrene-butadiene copolymer, acrylonitrile.
- -Elastomers such as butadiene copolymer, polybutadiene rubber, natural rubber, polyester-based thermoplastic elastomer, and olefin-based thermoplastic elastomer are preferable. Of these, silicone rubber is preferable.
- the cross-linking agent can be appropriately selected according to the type of elastomer.
- silicone rubber crosslinking agents include organic peroxides such as benzoyl peroxide, bis-2,4-dichlorobenzoyl peroxide, dicumyl peroxide, and di-t-butyl peroxide.
- examples of the cross-linking agent for acrylic rubber (acrylic polymer) include epoxy compounds, melamine compounds and isocyanate compounds.
- the first elastomer composition may further contain other components such as a tackifier, a silane coupling agent, and a filler, if necessary, from the viewpoint of easily adjusting the tackiness and the storage elastic modulus to the above range. ..
- the first elastomer composition may be porous, for example, from the viewpoint of easily adjusting the storage elastic modulus to the above range. That is, porous silicone can also be used.
- the thickness of the insulating layer 12 is not particularly limited as long as the insulating property can be secured, but may be 20 to 100 ⁇ m, for example.
- the thickness of the insulating layer 12 can be measured according to ASTM D6988.
- the anisotropic conductive sheet 10 may further have a layer other than the above if necessary.
- the electrolyte layer 13 (see FIG. 8 to be described later) arranged on the surface of the anisotropic conductive sheet 10 on the first surface 12a side (or on the first end 11a of the conductive path 11) and a plurality of conductive layers It may further have a plurality of adhesive layers 14 (see FIGS. 9A and B described below) disposed between the passage 11 and the insulating layer 12.
- FIG. 3A is a partially enlarged sectional view of the anisotropic conductive sheet 1 for comparison
- FIG. 3B is a plan view of FIG. 3A.
- the conductive paths 2 are linearly formed in the cross section along the thickness direction of the insulating layer 3. That is, the conductive path 2 does not have a non-linear portion. Therefore, when the inspection target is placed on the surface of the anisotropic conductive sheet 1 and pressed, it is difficult to disperse the pressing force. Therefore, the terminal of the inspection object may be damaged by the contact with the first end 2a of the conductive path 2 of the anisotropic conductive sheet 1.
- the conductive path 11 has the non-linear portion 11c (see FIGS. 2A and 2B).
- the non-linear portion 11c can exhibit elasticity (like a spring) that expands and contracts in the thickness direction of the insulating layer 12.
- the force when the inspection object is arranged on the surface of the anisotropic conductive sheet 10 and pressed can be dispersed in the non-linear portion 11c. This can prevent the terminals of the inspection object from being damaged by contact with the first end 11a of the conductive path 11 of the anisotropic conductive sheet 10.
- the contact area between the conductive path 11 and the insulating layer 12 increases, so that the adhesiveness between the conductive path 11 and the insulating layer 12 can be improved. Thereby, the conductive path 11 can be suppressed from peeling off from the insulating layer 12.
- FIGS. 4A to 4C are schematic diagrams showing the manufacturing process of the anisotropic conductive sheet 10 according to the present embodiment.
- the anisotropic conductive sheet 10 for example, 1) a plurality of composite sheets 20 in which a plurality of conductive lines 22 are arranged on the surface of an insulating sheet 21 are prepared. Step (see FIG. 4A), 2) Step of stacking a plurality of composite sheets 20 and sequentially integrating them to obtain a laminate 23 (see FIGS. 4A and B), 3) Obtain the obtained laminate 23, It can be obtained through the steps (see FIGS. 4B and 4C) of obtaining the anisotropic conductive sheet 10 by cutting the sheet at predetermined intervals.
- Step 1) A plurality of composite sheets 20 in which a plurality of conductive wires 22 are arranged on the surface of the insulating sheet 21 are prepared.
- the insulating sheet 21 may be a resin sheet (such as a silicone sheet) made of the first resin composition forming the insulating layer 12.
- Arrangement of the conductive wire 22 on the surface of the insulating sheet 21 can be performed by an arbitrary method.
- the metal wire may be arranged as it is, may be formed by drawing a metal paste with a dispenser or the like, or a metal ink may be printed by an inkjet method or the like. Good.
- step 2 the composite sheets 20 obtained are laminated and sequentially integrated (FIGS. 4A and 4B).
- the method of integration is not particularly limited, but usually thermocompression bonding or pressure bonding can be used.
- the stacking and integration of the composite sheet 20 are sequentially repeated to obtain the block-shaped stacked body 23 (see FIG. 4B).
- the laminate 23 obtained is intersected (preferably orthogonal) to the extending direction of the conductive wires 22 and cut at predetermined intervals (t) along the laminating direction (Fig. 4B dashed line).
- the anisotropic conductive sheet 10 having a predetermined thickness (t) can be obtained (FIG. 4C). That is, the plurality of conductive paths 11 in the anisotropic conductive sheet 10 are derived from the plurality of conductive lines 22, and the insulating layer 12 is derived from the insulating sheet 21.
- the method for manufacturing the anisotropic conductive sheet 10 according to this embodiment may further include steps other than the above 1) to 3) depending on the configuration of the anisotropic conductive sheet 10. ..
- the anisotropic conductive sheet 10 according to this embodiment can be used for electrical inspection and the like.
- FIG. 5 is a sectional view showing the electrical inspection device 100 according to the present embodiment.
- the electrical inspection apparatus 100 uses the anisotropic conductive sheet 10 of FIG. 1B and is an apparatus for inspecting electrical characteristics such as conduction between terminals 131 (between measurement points) of the inspection object 130. It should be noted that the drawing also shows the inspection object 130 from the viewpoint of explaining the electrical inspection method.
- the electrical inspection device 100 includes a holding container (socket) 110, an inspection substrate 120, and an anisotropic conductive sheet 10.
- the holding container (socket) 110 is a container for holding the inspection substrate 120, the anisotropic conductive sheet 10, and the like.
- the inspection substrate 120 is arranged in the holding container 110, and has a plurality of electrodes 121 facing each measurement point of the inspection object 130 on the surface facing the inspection object 130.
- the anisotropic conductive sheet 10 is arranged on the surface of the inspection substrate 120 on which the electrode 121 is arranged so that the electrode 121 and the electrolyte layer 13 on the second surface 12b side of the anisotropic conductive sheet 10 are in contact with each other. Has been done.
- the inspection target 130 is not particularly limited, and examples thereof include various semiconductor devices (semiconductor packages) such as HBM and PoP, electronic components, and printed circuit boards.
- the measurement points may be bumps (terminals).
- the measurement point may be a measurement land provided on the conductive pattern or a land for mounting a component.
- an inspection substrate 120 having an electrode 121 and an inspection object 130 are laminated via an anisotropic conductive sheet 10 to perform an inspection.
- the inspection target object may be added as necessary. It is also possible to press 130 to apply pressure (see FIG. 5) or to bring them into contact with each other in a heated atmosphere.
- the surface (first surface 12a) of the anisotropic conductive sheet 10 contacts the terminals 131 of the inspection object 130.
- the conductive path 11 has the non-linear portion 11c.
- the non-linear portion 11c can exhibit elasticity like a spring that moves up and down in the thickness direction of the insulating layer 12.
- a virtual line AA ′ connecting the first end 11a and the second end 11b of the conductive path 11 is parallel to the thickness direction of the insulating layer 12.
- the present invention is not limited to this.
- FIG. 6A is a partial cross-sectional view showing an anisotropic conductive sheet 10 according to a modification
- FIG. 6B shows that the center of the first end 11a and the center of the second end 11b overlap with each other in FIG. 6A
- FIG. 3 is a perspective view of the conductive path 11 when seen through.
- a virtual line A-A ′ connecting the first end 11a and the second end 11b of the conductive path 11 does not have to be completely parallel to the thickness direction of the insulating layer 12.
- the anisotropic conductive sheet 10 has an example in which the non-linear portion 11c of the conductive path 11 has a zigzag shape, but the present invention is not limited to this.
- the non-linear portion 11c of the conductive path 11 may have a wavy shape (see FIG. 7A), an arch shape (see FIG. 7B), or V. It may have a letter shape (see FIG. 7C). Further, the shape may be a combination of a wavy shape, a zigzag shape, an arch shape or a V shape, and a straight line portion (see FIGS. 7A to 7G). The distance d and the height h of these non-linear portions 11c are defined in the same manner as above.
- the anisotropic conductive sheet 10 may further include layers other than the above, for example, the electrolyte layer 13 and the adhesive layer 14, as described above.
- FIG. 8 is a cross-sectional view of the anisotropic conductive sheet 10 according to the modification. As shown in FIG. 8, the anisotropic conductive sheet 10 may further include an electrolyte layer 13 disposed on the surface on the first surface 12a side.
- the electrolyte layer 13 is, for example, a film containing a lubricant, and can be arranged on the first end 11 a of the conductive path 11.
- Examples of the lubricant contained in the electrolyte layer 13 include a fluororesin-based lubricant, a lubricant mainly composed of an inorganic material such as boron nitride, silica, zirconia, silicon carbide and graphite; paraffin wax, metal soap, natural, Hydrocarbon release agents such as synthetic paraffins, polyethylene waxes, fluorocarbons; higher fatty acids such as stearic acid and hydroxystearic acid; fatty acid release agents such as oxyfatty acids; stearic acid amide, ethylenebis stearamide Fatty acid amide release agents such as alkylene bis fatty acid amides; Alcohol release agents such as stearyl alcohol, cetyl alcohol and other aliphatic alcohols, polyhydric alcohols, polyglycols, polyglycerols, etc .; Butyl steer , Fatty acid ester lower release agents such as fatty acid lower alcohol esters, fatty acid polyhydric alcohol esters, and
- the metal salt of alkylsulfonic acid is preferably an alkali metal salt of alkylsulfonic acid.
- alkali metal salts of alkyl sulfonic acids include sodium 1-decane sulfonate, sodium 1-undecane sulfonate, sodium 1-dodecane sulfonate, sodium 1-tridecane sulfonate, sodium 1-tetradecane sulfonate, 1- Sodium pentadecanesulfonate, sodium 1-hexadecanesulfonate, sodium 1-heptadecanesulfonate, sodium 1-octadecanesulfonate, sodium 1-nonadecanesulfonate, sodium 1-eicosandecasulfonate, potassium 1-decanesulfonate , Potassium 1-undecanesulfonate, potassium 1-dodecanesulfonate, potassium 1-tridecanesulfonate, potassium 1-
- the conductivity of the conductive path 11 on the surface on the first surface 12a side can be ensured by making the thickness of the electrolyte layer 13 extremely thin.
- the formation of the electrolyte layer 13 can be performed by an arbitrary method, for example, a method of applying a solution of the electrolyte layer 13.
- the method for applying the solution of the electrolyte layer 13 may be a known method such as spraying or brush application, dropping the solution of the electrolyte layer 13, or dipping the anisotropic conductive sheet 10 into the solution.
- the material of the electrolyte layer 13 is diluted with a solvent such as alcohol, and the diluted solution (solution of the electrolyte layer 13) is applied to the surface of the anisotropic conductive sheet 10 (conductive path 11), A method of evaporating the solvent can be appropriately used. Thereby, the electrolyte layer 13 can be uniformly formed on (on the conductive path 11 of) the anisotropic conductive sheet 10.
- the anisotropic conductive sheet 10 is heated to a high temperature and the material is heated. It is also possible to use a method of applying by melting.
- FIG. 9A is a partially enlarged view of a horizontal section of the anisotropic conductive sheet 10 according to the modification (partial sectional view taken along a direction orthogonal to the thickness direction), and FIG. 9B is an anisotropic conductive sheet of FIG. 9A.
- 3 is a partially enlarged view of a vertical cross section of the elastic sheet 10 (partial cross section along the thickness direction).
- the anisotropic conductive sheet 10 may further have a plurality of adhesive layers 14 arranged between the plurality of conductive paths 11 and the insulating layer 12.
- the adhesive layer 14 is disposed on at least a part (at least a part of a side surface of the conductive path 11) between the conductive path 11 and the insulating layer 12.
- the adhesive layer 14 is arranged so as to surround the side surface of the conductive path 11 (FIG. 9B).
- the adhesive layer 14 enhances the adhesiveness between the conductive path 11 and the insulating layer 12, and makes it difficult to peel off at the boundary surface between them. That is, the adhesive layer 14 can also function as a bonding layer that enhances the adhesiveness between the conductive path 11 and the insulating layer 12.
- the material forming the adhesive layer 14 is not particularly limited as long as it can sufficiently bond the conductive path 11 and the insulating layer 12 as long as the function of the conductive path 11 is not impaired.
- the material forming the adhesive layer 14 may be an organic-inorganic composite composition containing a polycondensate of alkoxysilane or its oligomer, or may be a second resin composition.
- the organic-inorganic composite composition includes a polycondensate of alkoxysilane or its oligomer.
- Alkoxysilane is an alkoxysilane compound in which 2 to 4 alkoxy groups are bonded to silicon. That is, the alkoxysilane can be a bifunctional alkoxysilane, a trifunctional alkoxysilane, a tetrafunctional alkoxysilane, or a mixture of one or more of these. Among them, the alkoxysilane preferably contains a trifunctional or tetrafunctional alkoxysilane from the viewpoint of forming a three-dimensional crosslinked product and easily obtaining sufficient adhesiveness, and a tetrafunctional alkoxysilane (tetraalkoxysilane) is preferably used. It is more preferable to include.
- the alkoxysilane oligomer may be a partially hydrolyzed and polycondensed alkoxysilane.
- the alkoxysilane or the oligomer thereof preferably contains, for example, a compound represented by the following formula (1).
- each R is independently an alkyl group.
- n is an integer of 0 to 20.
- alkoxysilane represented by the formula (1) include tetramethoxysilane, tetraethoxysilane, tetrabutoxy and the like.
- the alkoxysilane or its oligomer may be a commercially available product.
- Examples of commercially available oligomers of alkoxysilane include Colcoat N-103X and Colcoat PX manufactured by Colcoat.
- the organic-inorganic composite composition may further contain other components such as a conductive material, a silane coupling agent, and a surfactant, if necessary.
- the glass transition temperature of the second resin composition forming the adhesive layer 14 is not particularly limited, but is preferably higher than the glass transition temperature of the first resin composition forming the insulating layer 12.
- the glass transition temperature of the second resin composition is preferably 150 ° C. or higher, more preferably 160 to 600 ° C.
- the glass transition temperature of the second resin composition can be measured by the same method as described above.
- the second resin composition forming the adhesive layer 14 is not particularly limited, but from the viewpoint of easily exhibiting adhesiveness, the second resin composition is a composition containing an elastomer and a crosslinking agent (hereinafter, referred to as “second (Also referred to as "elastomer composition”), a resin composition containing a resin that is not an elastomer, or a cured product of a resin composition that contains a curable resin that is not an elastomer and a curing agent. ..
- the same elastomers as those listed as the elastomer contained in the first elastomer composition can be used.
- the type of elastomer contained in the second elastomer composition may be the same as or different from the type of elastomer contained in the first elastomer composition.
- the type of elastomer contained in the second elastomer composition is the same as the type of elastomer contained in the first elastomer composition. Can be the same.
- the weight average molecular weight of the elastomer contained in the second elastomer composition is not particularly limited, but from the viewpoint of easily satisfying the glass transition temperature, it is preferably higher than the weight average molecular weight of the elastomer contained in the first elastomer composition. ..
- the weight average molecular weight of the elastomer can be measured in terms of polystyrene by gel permeation chromatography (GPC).
- the cross-linking agent contained in the second elastomer composition may be appropriately selected according to the kind of the elastomer, and the same ones as the cross-linking agent contained in the first elastomer composition can be used.
- the content of the crosslinking agent in the second elastomer composition is not particularly limited, but from the viewpoint of easily satisfying the glass transition temperature, it is preferably higher than the content of the crosslinking agent in the first elastomer composition.
- the degree of crosslinking (gel fraction) of the crosslinked product of the second elastomer composition is preferably higher than the degree of crosslinking (gel fraction) of the crosslinked product of the first elastomer composition.
- non-elastomer resin including a curable resin
- the same non-elastomer resins and curing agents listed in the first resin composition may be used.
- the non-elastomer resin contained in the second resin composition is preferably polyimide, polyamideimide, acrylic resin, or epoxy resin.
- the second resin composition is a resin composition containing a resin that is not an elastomer or a cured product of a resin composition that contains a curable resin that is not an elastomer and a curing agent, from the viewpoint of easily satisfying the glass transition temperature.
- a resin composition containing a resin that is not an elastomer or a cured product of a resin composition that contains a curable resin that is not an elastomer and a curing agent from the viewpoint of easily satisfying the glass transition temperature.
- the thickness of the adhesive layer 14 is not particularly limited as long as it can sufficiently bond the conductive path 11 and the insulating layer 12 within a range that does not impair the function of the conductive path 11. It is usually preferable that the thickness of the adhesive layer 14 be smaller than the thickness of the circle equivalent diameter of the conductive path 11. Specifically, the thickness of the adhesive layer 14 is preferably 1 ⁇ m or less, and more preferably 0.5 ⁇ m or less.
- the adhesive layer 14 may be further arranged in a region other than between the conductive path 11 and the insulating layer 12.
- the adhesive layer 14 is further provided so as to connect the adhesive layer 14 on the side surface of one of the two adjacent conductive paths 11 and the adhesive layer 14 on the side surface of the other conductive path 11. It is arranged.
- the anisotropic conductive sheet 10 having the adhesive layer 14 can be manufactured by the following method.
- FIG. 10A to 10C are schematic views showing a manufacturing process of the anisotropic conductive sheet 10 according to the modified example.
- the illustration of the conductive path 11 on the first surface 11 a is omitted.
- step 1) while preparing the composite sheet 20 having the insulating sheet 21, the plurality of conductive wires 22, and the adhesive layer 24 covering at least a part of the side surface in this order (see FIG. 10A),
- step (1) a plurality of composite sheets 20 are laminated and sequentially integrated so that the adhesive layer 24 of the one composite sheet 20 and the insulating sheet 21 of the other composite sheet 20 are in contact with each other. It can be manufactured similarly (see FIGS. 10A to 10C).
- the composite sheet 20 can be obtained by any method.
- a plurality of conductive lines 22 covered with the adhesive layer 24 may be arranged on the surface of the insulating sheet 21 at predetermined intervals; a plurality of conductive lines 22 may be provided on the surface of the insulating sheet 21.
- the adhesive layer 24 may be formed so as to cover the plurality of conductive lines 22 after arranging them at a predetermined interval.
- the adhesive layer 24 may be formed by applying a solution containing the above-mentioned alkoxysilane or its oligomer or the above-mentioned elastomer composition, or by laminating these sheets.
- a plurality of conductive wires 22 are arranged on the surface of the insulating sheet 21 at a predetermined interval, and then the solution or composition is further applied to obtain the composite sheet 20 (FIG. 7A).
- Steps 2) and 3) can be performed in the same manner as described above.
- the anisotropic conductive sheet 10 having a predetermined thickness (t) can be obtained (see FIG. 10C). That is, in the anisotropic conductive sheet 10, the conductive path 11 is derived from the conductive wire 22, the insulating layer 12 is derived from an integrated product of the plurality of insulating sheets 21, and the adhesive layer 14 is derived from the adhesive layer 24. ..
- the anisotropic conductive composite sheet according to the present embodiment includes a first anisotropic conductive sheet (first anisotropic conductive layer) and a second anisotropic conductive sheet (first anisotropic conductive layer) laminated (fixed) thereon. 2 anisotropic conductive layer).
- the anisotropic conductive composite sheet can be used for electrical inspection, and the first anisotropic conductive sheet may be arranged so that the first anisotropic conductive sheet is on the inspection substrate side and the second anisotropic conductive sheet is on the inspection object side. preferable. Then, at least one of the first anisotropic conductive sheet and the second anisotropic conductive sheet may be the above-mentioned anisotropic conductive sheet (the anisotropic conductive sheet 10 according to the first embodiment).
- the anisotropic conductive sheet 10 according to the first exemplary embodiment is likely to exhibit elasticity such that it expands and contracts in the thickness direction, and can easily damage the terminals of the inspection target. It is preferable that the anisotropic conductive sheet 50 is used.
- FIG. 11A is a plan view showing the anisotropic conductive composite sheet 30 according to the present embodiment
- FIG. 11B is a sectional view taken along line 11B-11B in FIG. 11A.
- the anisotropic conductive composite sheet 30 includes a first anisotropic conductive sheet (first anisotropic conductive layer) 40 and a second anisotropic conductive sheet (second anisotropic conductive layer) 40 (second anisotropic conductive layer). Anisotropic conductive layer) 50. Then, the second anisotropic conductive sheet 50 is the above-mentioned anisotropic conductive sheet (the anisotropic conductive sheet 10 according to the first embodiment).
- the first anisotropic conductive sheet 40 is an insulating layer having a plurality of conductive paths 41 (first conductive paths) penetrating in the thickness direction, and insulating between them, and having a third surface 42a and a fourth surface 42b. 42 (first insulating layer) (see FIG. 11B).
- the conductive path 41 penetrates in the thickness direction of the first anisotropic conductive sheet 40, and has a third end portion 41a exposed on the third surface 42a side and a fourth end portion exposed on the fourth surface 42b side. 41b (see FIG. 11B).
- the “thickness direction” means ⁇ 10 ° or less with respect to the thickness direction of the insulating layer 42, as described above.
- the center-to-center distance p1 (pitch) of the third end portions 41a of the plurality of conductive paths 41 is the same as that of the plurality of conductive paths 51 of the second anisotropic conductive sheet 50 from the viewpoint of easily ensuring the conductivity in the thickness direction. It is preferably larger than the center-to-center distance p2 (pitch) of the five end portions 51a (see FIG. 11B). Specifically, depending on the center-to-center distance p2 of the plurality of conductive paths 51 of the fifth end portion 51a of the second anisotropic conductive sheet 50, the third of the plurality of conductive paths 41 of the first anisotropic conductive sheet 40 may be changed.
- the center-to-center distance p1 of the ends 41a may be, for example, 55 to 650 ⁇ m.
- the center-to-center distance p2 and the center-to-center distance of the sixth end portion 51b) may be the same or different.
- the center-to-center distance p1 of the third end portions 41a of the plurality of conductive paths 41 (or the center-to-center distance p2 of the fifth end portions 51a of the plurality of conductive paths 51) and the center of the fourth end portion 41b.
- the distance (or the distance between the centers of the sixth ends 51b) is the same, and these are also referred to as the distance between the centers of the plurality of conductive paths 41 (or the distance between the centers of the plurality of conductive paths 51).
- the conductive paths 41 are exposed on both surfaces of the first anisotropic conductive sheet 40.
- the first anisotropic conductive sheet 40 has the first anisotropic conductive sheet 50 on the surface where the second anisotropic conductive sheet 50 is laminated.
- the conductive path 41 of the anisotropic conductive sheet 40 preferably projects in the thickness direction than the insulating layer 42 (see FIG. 6B).
- the protruding height of the conductive path 41 is not particularly limited, but may be, for example, 10 to 40 ⁇ m, preferably 15 to 30 ⁇ m.
- the equivalent circle diameter of the conductive path 41 may be such that it can conduct electricity, and may be, for example, about 20 to 200 ⁇ m.
- the insulating layer 42 is arranged so as to fill the spaces between the plurality of conductive paths 41 and insulates the plurality of conductive paths 41 (see FIG. 11B).
- the same materials as those mentioned as the material forming the insulating layer 12 can be used, and preferably a cross-linked product of the first elastomer composition can be used.
- the Rockwell hardness of the surface of the first anisotropic conductive sheet 40 is not particularly limited, but is usually substantially the same as the Rockwell hardness of the conductive path 41 (for example, 90 to 100 of the Rockwell hardness of the conductive path 41). %). This is because the center-to-center distance p1 of the third end portion 41a of the conductive path 41 and the circle-equivalent diameter are relatively large (when the measuring indenter is applied to the cross-sectional center of the conductive path 41), the contact with the indenter occurs.
- the insulating layer 42 has a small surface area ratio, and the conductive path is formed on the surface of the first anisotropic conductive sheet 40 on which the second anisotropic conductive sheet 50 is laminated (the third surface 42a of the insulating layer 42). It is considered that 41 is projected from the insulating layer 42 or the like.
- the Rockwell hardness of the surface of the first anisotropic conductive sheet 40 can be measured by a hardness meter according to ASTM D785, as described later.
- the second anisotropic conductive sheet 50 is an insulation having a plurality of conductive paths 51 (second conductive paths) formed along the thickness direction and filling the spaces between the conductive paths 51 and a fifth surface 52a and a sixth surface 52b. And a layer 52 (second insulating layer) (see FIGS. 11A and 11B). Specifically, the third surface 42a of the first insulating layer 42 of the first anisotropic conductive sheet 40 and the sixth surface 52b of the second insulating layer 52 of the second anisotropic conductive sheet 50 face each other. They are stacked (see FIG. 11B).
- the second anisotropic conductive sheet 50 may be the anisotropic conductive sheet 10 according to the first embodiment. That is, the conductive path 51 (second conductive path) of the second anisotropic conductive sheet 50 corresponds to the conductive path 11 of the anisotropic conductive sheet 10, and the insulating layer 52 (second insulating layer) is the anisotropic layer. It corresponds to the insulating layer 12 in the directional conductive sheet 10.
- the fifth end portion 51a and the sixth end portion 51b of the conductive path 51 correspond to the first end portion 11a and the second end portion 11b of the conductive path 11, respectively
- the fifth surface 52a of the insulating layer 52 and the The six surfaces 52b correspond to the first surface 12a and the second surface 12b of the insulating layer 12, respectively.
- the center-to-center distance p2 (pitch) of the fifth ends 51a of the plurality of conductive paths 51 in the second anisotropic conductive sheet 50 is the third end 41a of the plurality of conductive paths 41 in the first anisotropic conductive sheet 40. Is smaller than the center-to-center distance p1 (pitch). Specifically, the center-to-center distance p2 of the fifth ends 51a of the plurality of conductive paths 51 is preferably 18 to 31% of the center-to-center distance p1 of the third ends 41a of the plurality of conductive paths 41.
- the center-to-center distance p2 of the fifth ends 51a of the plurality of conductive paths 51 may be, for example, 10 to 200 ⁇ m.
- the circle-equivalent diameter of the fifth end 41a of the conductive path 51 is usually smaller than the circle-equivalent diameter of the third end 41a of the conductive path 41.
- the insulating layer 52 is arranged so as to fill the spaces between the plurality of conductive paths 51 and insulates them.
- the material forming the insulating layer 52 is the same as the material forming the insulating layer 42, except that the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 is selected so as to satisfy the range described later. be able to.
- the material forming the insulating layer 52 is the same as the material forming the insulating layer 42. May be
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 (preferably the fifth surface 52a) is lower than the Rockwell hardness of the surface of the first anisotropic conductive sheet 40 (preferably the third surface 42a).
- the ratio of the surface area of the insulating material in contact with the indenter is large.
- the second anisotropic conductive sheet 50 has a relatively small center-to-center distance p2 of the fifth end portion 51a of the conductive path 51 and a circle equivalent diameter, the surface area of the insulating material in contact with the indenter is small. Is likely to increase.
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 becomes substantially the same as the Rockwell hardness between the metal wire and the insulating material (preferably the insulating material), and the conductive path 41 of It is considered that the hardness is lower than the Rockwell hardness of the surface of the first anisotropic conductive sheet 40 that is substantially the same as the Rockwell hardness.
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 is preferably M120 or less. Since the second anisotropic conductive sheet 50 has an appropriate flexibility, the terminals of the inspection object are electrically conductive as compared with the case where the first anisotropic conductive sheet 40 is directly contacted with the inspection object. It can be made difficult to be damaged by 51 or the like.
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 can be measured according to ASTM D785. Specifically, after the second anisotropic conductive sheet 50 is cut into a predetermined size, the M-scale Rockwell hardness of the obtained test piece is measured by a hardness meter according to ASTM D785.
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 can be adjusted by the ratio of the area of the insulating material (insulating layer 52) to the surface area of the second anisotropic conductive sheet 50.
- the ratio of the surface area of the insulating material (insulating layer 52) to the surface area of the second anisotropic conductive sheet 50 is preferable to increase the number, for example, more than that of the first anisotropic conductive sheet 40.
- the ratio of the surface area of the insulating layer 52 to the surface area of the second anisotropic conductive sheet 50 is preferably 75% or more.
- the ratio of the surface area of the insulating layer 52 can be calculated from the two-dimensional information obtained by observing the surface of the second anisotropic conductive sheet 50 with a scanning electron microscope.
- Ratio of surface area of insulating layer 52 (%) surface area of insulating layer 52 / surface area of second anisotropic conductive sheet 50 ⁇ 100
- the ratio of the surface area of the insulating material (insulating layer 52) can be adjusted by, for example, the equivalent circle diameter of the metal wire or the center-to-center distance p2.
- the ratio of the surface area of the insulating material (insulating layer 52) can be adjusted by, for example, the equivalent circle diameter of the metal wire or the center-to-center distance p2.
- the second anisotropic conductive sheet 50 of a metal wire is used. It is preferable to lower the height of protrusion from the surface, for example, lower than that of the first anisotropic conductive sheet 40. Specifically, it is preferable that the conductive path 51 does not protrude from the surface of the second anisotropic conductive sheet 50. This is because the conductive path 51 protruding from the surface of the second anisotropic conductive sheet 50 easily affects the Rockwell hardness.
- the thickness of the second insulating layer 52 of the second anisotropic conductive sheet 50 is preferably smaller than the thickness of the first insulating layer 42 of the first anisotropic conductive sheet 40. That is, the second anisotropic conductive sheet 50 usually has a larger conduction resistance value than the first anisotropic conductive sheet 40. Therefore, when the ratio of the thickness of the second anisotropic conductive sheet 50 is appropriately small, the conduction resistance value of the entire anisotropic conductive composite sheet 30 does not become too high, and the inspection accuracy is less likely to be impaired.
- the thickness of the second insulating layer 52 of the second anisotropic conductive sheet 50 is, for example, 20 to 100 ⁇ m from the viewpoint of preventing the conductive resistance value of the entire anisotropic conductive composite sheet 30 from becoming too high. preferable.
- the thicknesses of the second insulating layer 52 and the first insulating layer 42 can be measured by the same method as described above.
- the ratio T2 / T1 between the thickness T2 of the second insulating layer 52 of the second anisotropic conductive sheet 50 and the thickness T1 of the first insulating layer 42 of the first anisotropic conductive sheet 40 is 1/4 to 1 / It can be about 10.
- the second anisotropic conductive sheet 50 may be laminated on only one surface of the first anisotropic conductive sheet 40, or may be laminated on both surfaces.
- the second anisotropic conductive sheet 50 is laminated on one surface of the first anisotropic conductive sheet 40 (the side that comes into contact with the terminals of the inspection object). Then, the inspection object is arranged on the surface of the second anisotropic conductive sheet 50 (the surface opposite to the first anisotropic conductive sheet 40).
- the anisotropic conductive composite sheet 30 according to the present embodiment can have the following effects in addition to the effects described in the first embodiment.
- a conventional general anisotropic conductive sheet has good conductivity in the thickness direction, is the metal pin (called a metal wire), which is a conductive path, exposed on the surface of the anisotropic conductive sheet? , Or protruding. Therefore, when aligning the terminals of the inspection object on the anisotropic conductive sheet or performing an electrical inspection, the terminals of the inspection object are likely to come into contact with the exposed or protruding metal wires and be damaged. In addition, it is difficult to perform high-accuracy alignment of terminals of the inspection object with high density wiring of the inspection object, that is, finer pitch between terminals.
- the anisotropic conductive sheet 10 (second anisotropic conductive sheet) according to the first embodiment is used.
- Sheet 50 the anisotropic conductive sheet 10 according to the first embodiment is likely to exhibit elasticity such that it expands and contracts in the thickness direction, and can make the terminals of the inspection object less likely to be damaged. It is possible to suppress the damage of the inspection target due to.
- center-to-center distance p2 of the first end portion 11a of the conductive path 11 of the anisotropic conductive sheet 10 (second anisotropic conductive sheet 50) according to the first embodiment is reduced, thereby performing alignment (alignment). Can be eliminated.
- the anisotropic conductive composite sheet 30 of the present disclosure can be manufactured by any method.
- the anisotropic conductive composite sheet 30 includes 1) a step of preparing the first anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50, and 2) a first anisotropic conductive sheet 40 and a second anisotropic conductive sheet 40. After the anisotropically conductive sheet 50 is laminated, it can be integrated by thermocompression bonding or the like.
- the first anisotropic conductive sheet 40 can be manufactured by any method.
- the first anisotropic conductive sheet 40 as shown in FIGS. 11A and 11B includes an insulating sheet and a layer in which a plurality of long metal lines are arranged at a predetermined pitch so as not to contact each other.
- the obtained laminated body can be obtained by cutting the laminated body in a direction parallel to the laminating direction (direction perpendicular to the metal line) to a predetermined thickness.
- the conductive path 51 of the second anisotropic conductive sheet 50 is a metal wire (see FIG. 11B), it can be manufactured by the same method as described above.
- the first anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50 can be integrated by any method such as thermocompression bonding.
- FIG. 11A and 11B show an example (composite sheet) in which the first anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50 are integrated, but the present invention is not limited to this and the first anisotropic conductive sheet is not limited thereto.
- the anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50 may not be integrated, and may be laminated at the time of use.
- FIG. 12 is a sectional view showing the anisotropic conductive sheet set 60 according to this embodiment.
- the anisotropic conductive sheet set 60 has a first anisotropic conductive sheet 40 and a second anisotropic conductive sheet 50 to be laminated on at least one surface thereof.
- the anisotropic conductive sheet set 60 includes a third surface 42 a of the first insulating layer 42 of the anisotropic conductive sheet 40 and a sixth surface of the second insulating layer 52 of the second anisotropic conductive sheet 50. It is used by stacking so that the surface 52b faces each other (see FIG. 12).
- the first anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50 are configured similarly to the above-described first anisotropic conductive anisotropic sheet 40 and the second anisotropic conductive sheet 50, respectively.
- the surface of the second anisotropic conductive sheet 50 that contacts the first anisotropic conductive sheet 40 may have a surface shape (for example, unevenness) that fits with the surface shape of the first anisotropic conductive sheet 40.
- the inspection object is arranged on the surface of the second anisotropic conductive sheet 50 (the surface opposite to the first anisotropic conductive sheet 40).
- the anisotropic conductive sheet 40 and the second anisotropic conductive sheet 50 are not integrated as described above, the anisotropic conductive sheet can be freely configured according to the type of the inspection object. Can be changed. Further, even if they are not integrated, by applying pressure when they are brought into contact with the terminals of the inspection object, sufficient electrical connection can be made.
- the anisotropic conductive composite sheet 30 and the anisotropic conductive sheet set 60 can be preferably used for electrical inspection of an inspection object such as a semiconductor device as described above.
- FIG. 13 is a sectional view showing the electrical inspection device 100 according to the present embodiment.
- the laminated body of the anisotropic conductive composite sheet 30 or the anisotropic conductive sheet set 60 is placed on the surface of the inspection substrate 120 on which the electrodes 121 are arranged.
- the structure is the same as that of the first embodiment except that the electrode 121 and the metal wire 11 are arranged in contact with each other.
- the surface of the second anisotropic conductive sheet 20 constituting the laminated body of the anisotropic conductive composite sheet 30 or the anisotropic conductive sheet set 60 is arranged so as to be in contact with the terminals of the inspection object 130.
- the Rockwell hardness of the surface of the second anisotropic conductive sheet 50 that comes into contact with the terminals 131 of the inspection object 130 is preferably as low as M120 or less, and has appropriate flexibility. Thereby, even if the terminal 131 of the inspection target object 130 is placed and pressed, the terminal 131 of the inspection target object 130 can be suppressed from being damaged by the second anisotropic conductive sheet 50.
- the center-to-center distance p2 of the fifth end portions 51a of the plurality of conductive paths 51 of the second anisotropic conductive sheet 50 is extremely smaller than that of the first anisotropic conductive sheet 40, the inspection target object 130. It is possible to eliminate the need for position alignment (alignment) of the terminals 131.
- the second anisotropic conductive sheet 50 is the anisotropic conductive sheet 10 according to the first embodiment
- the present invention is not limited to this, and the first anisotropic conductive sheet 40.
- it may be the anisotropic conductive sheet 10 according to the first embodiment.
- FIG. 14A is a sectional view showing an anisotropic conductive composite sheet 30 according to a modification
- FIG. 14B is a sectional view showing an anisotropic conductive sheet set 60 according to a modification
- FIG. 15 is a sectional view showing an anisotropic conductive composite sheet 30 according to a modification.
- FIG. 15A is a view showing an example in which the second anisotropic conductive sheet 50 in FIG. 14A is a dispersion type anisotropic conductive sheet
- FIG. 15B is an enlarged view of a broken line portion 15B of FIG. 15A
- FIG. 15C is a diagram showing an example in which the second anisotropic conductive sheet 50 in FIG. 14A is an unevenly distributed anisotropic conductive sheet.
- the first anisotropic conductive sheet 40 may be the anisotropic conductive sheet 10 according to the first embodiment (see FIGS. 14A and 14B and FIGS. 15A to 15C).
- the conductive path 51 of the second anisotropic conductive sheet 50 may be composed of a plurality of conductive particles dispersed in an insulating material and forming a conductive path in the thickness direction in a pressurized state or a non-pressurized state.
- the second anisotropic conductive sheet 50 may include an insulating material and a plurality of conductive particles dispersed therein. From the viewpoint of obtaining sufficient conduction without alignment, it is preferable that the plurality of conductive particles be oriented in the thickness direction of the sheet.
- the number of conductive particles oriented in the thickness direction may be one or plural.
- the conductive particles oriented in the thickness direction may be dispersed throughout the sheet (dispersed type, see FIGS. 15A and B) or may be regularly unevenly distributed (unevenly distributed type, see FIG. 15C).
- the conductive path 51 of the second anisotropic conductive sheet 50 may be a member that conducts in the thickness direction in the unpressurized state or the pressurized state (see FIGS. 15A to 15C). From the viewpoint of eliminating the need for alignment, the conductive path 51 has a volume resistance value in a conductive state within the above range, preferably 1.0 ⁇ 10 ⁇ 10 ⁇ 4 to 1.0 ⁇ 10 ⁇ 10 ⁇ 5 ⁇ ⁇ It satisfies cm.
- the second anisotropic conductive sheet 50 includes a plurality of conductive particles P oriented in the thickness direction as the conductive paths 51 (see FIGS. 15A to 15C). Then, the plurality of conductive particles P oriented in the thickness direction are dispersed throughout the sheet.
- the conductive particles P are not particularly limited, but are preferably, for example, conductive magnetic particles from the viewpoint of orientation in the thickness direction.
- conductive magnetic particles include particles made of magnetic metals such as iron, nickel and cobalt or alloys thereof, or those obtained by plating these with conductive metals such as gold, silver, copper, tin, palladium and rhodium. Etc. are included.
- the median diameter (d50) of the conductive particles P is not particularly limited, but is, for example, 5 to 100 ⁇ m, preferably 10 to 50 ⁇ m.
- the median diameter of the conductive particles P can be measured by a light scattering method, for example, a laser analysis / scattering type particle size distribution meter.
- the center-to-center distance p2 of the plurality of conductive paths 51 is specified as follows. That is, in the case of the dispersion type as shown in FIGS. 15A and B, between the center lines of the plurality of conductive particles P oriented in the thickness direction (lines connecting the centers of the plurality of conductive particles P oriented in the thickness direction). The distance is the center-to-center distance p2 of the plurality of conductive paths 51 (see FIG. 15B).
- the uneven distribution type as shown in FIG. 15C the uneven distribution portion is regarded as one conductive path 11, and the distance between the center lines of the uneven distribution portions is set to the center-to-center distance p2 of the plurality of conductive paths 51 (FIG. 15C).
- the second anisotropic conductive sheet 50 in which the conductive paths 51 are composed of the conductive particles P can be manufactured by the following procedure. i) First, a conductive elastomer composition containing an insulating material and conductive particles P exhibiting magnetism is prepared. Then, the conductive elastomer composition is applied onto the releasable support plate to form a conductive elastomer composition layer. ii) Next, a magnetic field is applied in the thickness direction of the conductive elastomer composition layer to orient the conductive particles P dispersed in the conductive elastomer composition layer so as to be aligned in the thickness direction.
- the conductive elastomer composition layer is cured, and the conductive particles P are oriented so as to be aligned in the thickness direction.
- a hydrophilic elastomer layer is obtained.
- the releasable support plate is peeled off to obtain the second anisotropic conductive sheet 50 composed of the conductive elastomer layer.
- a metal plate, a ceramics plate, a resin plate, or a composite material of these can be used as the releasable support plate used in the step i).
- the conductive elastomer composition can be applied by a printing method such as screen printing, a roll coating method, or a blade coating method.
- the thickness of the conductive elastomer composition layer is set according to the thickness of the conductive path to be formed.
- an electromagnet, a permanent magnet or the like can be used as a means for applying a magnetic field to the conductive elastomer composition layer.
- the strength of the magnetic field applied to the conductive elastomer composition layer is preferably 0.2 to 2.5 Tesla. Curing of the conductive elastomer composition layer is usually performed by heat treatment. The specific heating temperature and heating time are appropriately set in consideration of the type of elastomer composition forming the conductive elastomer composition layer, the time required to move the conductive particles P, and the like.
- FIG. 16A to 16C are diagrams showing anisotropic conductive sheets according to modified examples. Of these, FIG. 16A is a perspective view, FIG. 16B is a partially enlarged view of a horizontal section, and FIG. 16C is a partially enlarged view of a vertical section.
- peeling between the conductive path 11 and the insulating layer 12 is likely to occur in the conductive path 11 that does not have the non-linear portion 11c. 12 may be disposed between the two (see FIGS. 16A to 16C).
- FIG. 17A is a partially enlarged sectional view showing an anisotropic conductive composite sheet according to a modification
- FIG. 17B is a partially enlarged sectional view showing an anisotropic conductive sheet set according to a modification.
- an anisotropic conductive sheet in which the conductive path 11 does not have the non-linear portion 11c is less likely to bend in the thickness direction and easily damages the terminals of the inspection target, and therefore, the anisotropic conductive composite sheet or the anisotropic conductive sheet set.
- the example in which the inspection object 120 is pressed against the inspection substrate 120 on which the anisotropic conductive sheet 10 is arranged to perform the electric inspection is not limited thereto.
- the electrical inspection may be performed by pressing the inspection substrate 120 on which the anisotropic conductive sheet 10 is arranged against the inspection object 130.
- an anisotropic conductive sheet an electric inspection device, and an electric inspection method capable of suppressing damage to an inspection object.
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Abstract
Description
[異方導電性シート]
図1Aは、実施の形態1に係る異方導電性シート10を示す平面図であり、図1Bは、図1Aの1B-1B線の断面図である。図2Aは、図1Bの拡大図であり、図2Bは、図2Aにおいて、異方導電性シート10を第1面12a側から平面透視したときの透視図である。
導電路11は、絶縁層12の厚み方向に延在しており、かつ第1面12a側の第1端部11aと、第2面側の第2端部11bとを有する(図1B参照)。具体的には、導電路11は、絶縁層12の厚み方向に貫通しており、かつ第1端部11aは、第1面12a側に露出しており、第2端部11bは、第2面12b側に露出していることが好ましい。
絶縁層12は、複数の導電路11の間を埋めるように配置され、複数の導電路11同士の間を絶縁する。そのような絶縁層12は、異方導電性シート10の一方の面をなす第1面12aと、他方の面をなす第2面12bとを有する。
絶縁層12の厚みは、絶縁性を確保できる程度であればよく、特に制限されないが、例えば20~100μmでありうる。絶縁層12の厚みは、ASTM D6988に準拠して測定することができる。
本実施の形態に係る異方導電性シート10は、必要に応じて上記以外の他の層をさらに有してもよい。例えば、異方導電性シート10の、第1面12a側の面上(または導電路11の第1端部11a上)に配置された電解質層13(後述の図8参照)や、複数の導電路11と絶縁層12との間に配置された複数の接着層14(後述の図9AおよびB参照)をさらに有してもよい。
本実施の形態に係る異方導電性シート10の作用について、比較用の異方導電性シート1と対比しながら説明する。図3Aは、比較用の異方導電性シート1の部分拡大断面図であり、図3Bは、図3Aの平面図である。
図4A~Cは、本実施の形態に係る異方導電性シート10の製造工程を示す模式図である。
絶縁シート21の表面に、複数の導電線22を配置した複合シート20を複数準備する。
得られた複合シート20を積層しながら、順次、一体化させる(図4AおよびB)。一体化させる方法は、特に制限されないが、通常、熱圧着や圧着などでありうる。
得られた積層体23を、導電線22の延びる方向に対して交差し(好ましくは直交し)、かつ積層方向に沿って、所定の間隔(t)ごとにカットする(図4Bの破線)。それにより、所定の厚み(t)を有する異方導電性シート10を得ることができる(図4C)。すなわち、異方導電性シート10における複数の導電路11は、複数の導電線22に由来し、絶縁層12は、絶縁シート21に由来する。
本実施の形態に係る異方導電性シート10の製造方法は、異方導電性シート10の構成に応じて、上記1)~3)以外の他の工程をさらに含みうる。例えば、得られた異方導電性シート10の表面に、電解質層13を形成する工程をさらに有してもよい(後述の図8参照)。
(電気検査装置)
図5は、本実施の形態に係る電気検査装置100を示す断面図である。
図5の電気検査装置100を用いた電気検査方法について説明する。
なお、上記実施の形態では、異方導電性シート10として、導電路11の第1端部11aと第2端部11bとを結ぶ仮想線A-A’が、絶縁層12の厚み方向と平行である例(図2A参照)を示したが、これに限定されない。
図8は、変形例に係る異方導電性シート10の断面図である。図8に示されるように、異方導電性シート10は、第1面12a側の面上に配置された電解質層13をさらに有しうる。
図9Aは、変形例に係る異方導電性シート10の水平断面の部分拡大図であり(厚み方向に対して直交する方向に沿った部分断面図)、図9Bは、図9Aの異方導電性シート10の縦断面の部分拡大図(厚み方向に沿った部分断面図)である。
有機-無機複合組成物は、アルコキシシランまたはそのオリゴマーの重縮合物を含む。
接着層14を構成する第2樹脂組成物のガラス転移温度は、特に限定されないが、絶縁層12を構成する第1樹脂組成物のガラス転移温度よりも高いことが好ましい。
接着層14の厚みは、導電路11の機能を損なわない範囲で、導電路11と絶縁層12との間を十分に接着させうる程度であればよく、特に制限されない。接着層14の厚みは、通常、導電路11の円相当径の厚みよりも小さいことが好ましい。具体的には、接着層14の厚みは、1μm以下であることが好ましく、0.5μm以下であることがより好ましい。
[異方導電性複合シート]
本実施の形態に係る異方導電性複合シートは、第1異方導電性シート(第1異方導電性層)と、その上に積層(固定)された第2異方導電性シート(第2異方導電性層)とを有する。異方導電性複合シートは、電気検査に用いることができ、第1異方導電性シートが検査用基板側、第2異方導電性シートが検査対象物側となるように配置されることが好ましい。そして、第1異方導電性シートと第2の異方導電性シートのうち少なくとも一方が、前述の異方導電性シート(実施の形態1に係る異方導電性シート10)でありうる。
第1異方導電性シート40は、厚み方向に貫通する複数の導電路41(第1導電路)と、それらの間を絶縁し、かつ第3面42aと第4面42bとを有する絶縁層42(第1絶縁層)とを有する(図11B参照)。
第2異方導電性シート50は、厚み方向に沿って形成された複数の導電路51(第2導電路)と、それらの間を埋めるとともに第5面52aおよび第6面52bとを有する絶縁層52(第2絶縁層)とを有する(図11AおよびB参照)。具体的には、第1異方導電性シート40の第1絶縁層42の第3面42aと、第2異方導電性シート50の第2絶縁層52の第6面52bとが向かい合うように積層されている(図11B参照)。
式(1) 絶縁層52の表面積の割合(%)=絶縁層52の表面積/第2異方導電性シート50の表面積×100
第2異方導電性シート50は、第1異方導電性シート40の一方の面のみに積層されてもよいし、両方の面に積層されてもよい。本実施の形態では、第2異方導電性シート50は、第1異方導電性シート40の一方の面(検査対象物の端子と接触させる側)に積層されている。そして、第2異方導電性シート50の表面(第1異方導電性シート40とは反対側の面)に、検査対象物が配置される。
本実施の形態に係る異方導電性複合シート30によれば、上記実施の形態1で述べた効果に加えて、以下の効果を有しうる。
本開示の異方導電性複合シート30は、任意の方法で製造することができる。例えば、異方導電性複合シート30は、1)第1異方導電性シート40と第2異方導電性シート50をそれぞれ準備する工程と、2)第1異方導電性シート40と第2異方導電性シート50とを積層した後、熱圧着などにより一体化する工程と、を経て得ることができる。
第1異方導電性シート40は、任意の方法で製造することができる。例えば、図11AおよびBに示されるような第1異方導電性シート40は、複数の長い金属線を互いに接触しないように所定のピッチで並べた層(金属線からなる層)と絶縁シートとを交互に積層して積層体を得た後、得られた積層体を積層方向に平行な方向(金属線に対して垂直な方向)に所定の厚みに切断することによって得ることができる。
第1異方導電性シート40と第2異方導電性シート50との一体化は、例えば熱圧着などの任意の方法で行うことができる。
図12は、本実施の形態に係る異方導電性シートセット60を示す断面図である。
図13は、本実施の形態に係る電気検査装置100を示す断面図である。
上記実施の形態では、第2異方導電性シート50が、実施の形態1に係る異方導電性シート10である例を示したが、これに限定されず、第1異方導電性シート40が、実施の形態1に係る異方導電性シート10であってもよい。
i)まず、絶縁性材料と、磁性を示す導電性粒子Pとを含む導電性エラストマー組成物を調製する。そして、離型性支持板上に、導電性エラストマー組成物を塗布して、導電性エラストマー組成物層を形成する。
ii)次いで、導電性エラストマー組成物層の厚み方向に磁場を作用させて、導電性エラストマー組成物層中に分散された導電性粒子Pを、厚み方向に並ぶよう配向させる。そして、導電性エラストマー組成物層に対する磁場の作用を継続しながら、または磁場の作用を停止した後、導電性エラストマー組成物層を硬化させて、導電性粒子Pが厚み方向に並ぶよう配向した導電性エラストマー層を得る。
iii)そして、離型性支持板を剥離して、導電性エラストマー層からなる第2異方導電性シート50を得る。
なお、上記実施の形態では、いずれも非直線部11cを有する導電路を有する異方導電性シートを用いた例について説明したが、目的に応じて、非直線部11cを有しない導電路を有する異方導電性シートを用いてもよい(図16および17参照)。
11、41、51 導電路
11a 第1端部
11b 第2端部
11c 非直線部
12、42、52 絶縁層
12a 第1面
12b 第2面
13 電解質層
14、24 接着層
20 複合シート
21 絶縁シート
22 導電線
23 積層体
30 異方導電性複合シート
40 第1異方導電性シート
41a 第3端部
41b 第4端部
42a 第5端部
42b 第6端部
50 第2異方導電性シート
51a 第3面
51b 第4面
52a 第5面
52b 第6面
60 異方導電性シートセット
100 電気検査装置
110 保持容器
120 検査用基板
121 電極
130 検査対象物
131 (検査対象物の)端子
Claims (20)
- 複数の導電路と、
前記複数の導電路の間を埋めるように配置され、第1面と第2面とを有する絶縁層と、を有し、
前記導電路は、前記絶縁層の厚み方向に延在しており、かつ前記第1面側の第1端部と、前記第2面側の第2端部とを有し、
前記第1端部の中心と前記第2端部の中心とが重なるように前記導電路を透視したとき、前記導電路の少なくとも一部は、前記第1端部および前記第2端部とは重ならない、
異方導電性シート。 - 前記第1端部は、前記第1面側に露出しており、
前記第2端部は、前記第2面側に露出している、
請求項1に記載の異方導電性シート。 - 前記絶縁層の厚み方向に沿って平面透視したときに、
前記第1端部の中心と前記第2端部の中心とは重なっており、かつ
前記導電路の少なくとも一部は、前記第1端部および前記第2端部とは重ならない、
請求項1または2に記載の異方導電性シート。 - 前記絶縁層の厚み方向に沿った断面において、
前記導電路の少なくとも一部は、波形、ジグザグ形状、アーチ状、またはV字状を有する、
請求項1~3のいずれか一項に記載の異方導電性シート。 - 前記絶縁層の厚み方向に沿った断面において、
前記第1端部と前記第2端部との間の中間点よりも前記第1端部側に位置する前記導電路の少なくとも一部は、波形、ジグザグ形状、アーチ状、またはV字状を有する、
請求項4に記載の異方導電性シート。 - 前記複数の導電路の第1端部の中心間距離は、5~55μmである、
請求項1~5のいずれか一項に記載の異方導電性シート。 - 前記複数の導電路の第1端部の円相当径は、2~20μmである、
請求項6に記載の異方導電性シート。 - 前記複数の導電路と前記絶縁層との間の少なくとも一部にそれぞれ配置された複数の接着層をさらに有する、
請求項1~7のいずれか一項に記載の異方導電性シート。 - 前記接着層は、アルコキシシランまたはそのオリゴマーの重縮合物を含む、
請求項8に記載の異方導電性シート。 - 前記絶縁層は、第1樹脂組成物からなり、
前記接着層は、第2樹脂組成物からなり、
前記第2樹脂組成物のガラス転移温度は、前記第1樹脂組成物のガラス転移温度よりも高い、
請求項8の異方導電性シート。 - 検査対象物の電気検査に用いられる異方導電性シートであって、
前記検査対象物は、前記第1面上に配置される、
請求項1~10のいずれか一項に記載の異方導電性シート。 - 厚み方向に貫通する複数の第1導電路と、前記複数の第1導電路の間を埋めるように配置され、第3面と第4面とを有する第1絶縁層とを有する第1異方導電性シートと、
厚み方向に延設された複数の第2導電路と、前記複数の第2導電路の間を埋めるように配置され、第5面と第6面とを有する第2絶縁層とを有する第2異方導電性シートとを有し、
前記第1異方導電性シートと前記第2異方導電性シートとは、前記第1絶縁層の前記第3面と前記第2絶縁層の前記第6面とが向かい合うように積層されており、
前記第1異方導電性シートと前記第2異方導電性シートの少なくとも一方が、請求項1~11のいずれか一項に記載の異方導電性シートであり、
前記第5面側における前記複数の第2導電路の中心間距離p2は、前記第3面側における前記複数の第1導電路の中心間距離p1よりも小さく、かつ
前記第2異方導電性シートの前記第5面の前記ロックウェル硬度は、前記第1異方導電性シートの前記第3面の前記ロックウェル硬度よりも低い、
異方導電性複合シート。 - 前記第2異方導電性シートの前記第5面の前記ロックウェル硬度は、M120以下である、
請求項12に記載の異方導電性複合シート。 - 前記第5面側における前記複数の第2導電路の中心間距離p2は、前記第3面側における前記複数の第1導電路の中心間距離p1の18~31%である、
請求項12または13に記載の異方導電性複合シート。 - 前記第2絶縁層の厚みは、前記第1絶縁層の厚みよりも小さい、
請求項12~14のいずれか一項に記載の異方導電性複合シート。 - 検査対象物の電気検査に用いられる異方導電性複合シートであって、
前記検査対象物は、前記第2異方導電性シートの前記第5面上に配置される、
請求項12~15のいずれか一項に記載の異方導電性複合シート。 - 厚み方向に貫通する複数の第1導電路と、前記複数の第1導電路の間を埋めるように配置され、第3面と第4面とを有する第1絶縁層とを有する第1異方導電性シートと、
厚み方向に延設された複数の第2導電路と、前記複数の第2導電路の間を埋めるように配置され、第5面と第6面とを有する第2絶縁層とを有する第2異方導電性シートとを有し、
前記第1異方導電性シートと前記第2異方導電性シートとは、前記第1絶縁層の前記第3面と前記第2絶縁層の前記第6面とが向かい合うように積層されるためのものであり、
前記第1異方導電性シートと前記第2異方導電性シートの少なくとも一方が、請求項1~11のいずれか一項に記載の異方導電性シートであり、
前記第5面側における前記複数の第2導電路の中心間距離p2は、前記第3面側における前記複数の第1導電路の中心間距離p1よりも小さく、かつ
前記第2異方導電性シートの前記第5面の前記ロックウェル硬度は、前記第1異方導電性シートの前記第3面の前記ロックウェル硬度よりも低い、
異方導電性シートセット。 - 検査対象物の電気検査に用いられる異方導電性シートセットであって、
前記検査対象物は、前記第2異方導電性シートの前記第5面上に配置される、
請求項17に記載の異方導電性シートセット。 - 複数の電極を有する検査用基板と、
前記検査用基板の前記複数の電極が配置された面上に配置された、請求項1~11のいずれか一項に記載の異方導電性シート、請求項12~16のいずれか一項に記載の異方導電性複合シート、または請求項17~18のいずれか一項に記載の異方導電性シートセットの積層物とを有する、
電気検査装置。 - 複数の電極を有する検査用基板と、端子を有する検査対象物とを、請求項1~11のいずれか一項に記載の異方導電性シート、請求項12~16のいずれか一項に記載の異方導電性複合シート、または請求項17~18のいずれか一項に記載の異方導電性シートセットの積層物を介して積層して、前記検査用基板の前記電極と、前記検査対象物の前記端子とを、前記異方導電性シートを介して電気的に接続する工程を有する、
電気検査方法。
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| JP2020557607A JP7257415B2 (ja) | 2018-11-21 | 2019-11-21 | 異方導電性シート、異方導電性複合シート、異方導電性シートセット、電気検査装置および電気検査方法 |
| CN201980076447.8A CN113168935B (zh) | 2018-11-21 | 2019-11-21 | 各向异性导电片、各向异性导电复合片、各向异性导电片组、电气检查装置及电气检查方法 |
| KR1020217015199A KR102587764B1 (ko) | 2018-11-21 | 2019-11-21 | 이방 도전성 시트, 이방 도전성 복합 시트, 이방 도전성 시트 세트, 전기 검사 장치 및 전기 검사 방법 |
| US17/295,474 US11860193B2 (en) | 2018-11-21 | 2019-11-21 | Anisotropic conductive sheet, anisotropic conductive composite sheet, anisotropic conductive sheet set, electric inspection device and electric inspection method |
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| JP7257415B2 (ja) | 2023-04-13 |
| KR20210076129A (ko) | 2021-06-23 |
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| CN113168935B (zh) | 2023-06-30 |
| TWI840452B (zh) | 2024-05-01 |
| KR102587764B1 (ko) | 2023-10-10 |
| JPWO2020105693A1 (ja) | 2021-09-27 |
| CN113168935A (zh) | 2021-07-23 |
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