WO2005103733A1 - シート状プローブおよびその製造方法並びにその応用 - Google Patents
シート状プローブおよびその製造方法並びにその応用 Download PDFInfo
- Publication number
- WO2005103733A1 WO2005103733A1 PCT/JP2005/007938 JP2005007938W WO2005103733A1 WO 2005103733 A1 WO2005103733 A1 WO 2005103733A1 JP 2005007938 W JP2005007938 W JP 2005007938W WO 2005103733 A1 WO2005103733 A1 WO 2005103733A1
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- WIPO (PCT)
- Prior art keywords
- sheet
- probe
- insulating layer
- surface electrode
- electrode
- Prior art date
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Classifications
-
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H29/00—Drive mechanisms for toys in general
- A63H29/22—Electric drives
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H30/00—Remote-control arrangements specially adapted for toys, e.g. for toy vehicles
- A63H30/02—Electrical arrangements
- A63H30/04—Electrical arrangements using wireless transmission
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
- A63H31/00—Gearing for toys
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/06—Differential gearings with gears having orbital motion
- F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
Definitions
- Sheet-shaped probe Method of manufacturing the same, and application thereof
- the present invention relates to a sheet-like probe suitable as a probe device for making an electrical connection to a circuit, for example, in an electrical inspection of a circuit such as an integrated circuit, a method of manufacturing the same, and an application thereof.
- the devices are arranged according to a pattern corresponding to a pattern of an electrode to be inspected of a circuit device to be inspected.
- An inspection probe having an inspection electrode is used.
- the circuit device to be inspected is a wafer on which a large number of integrated circuits are formed
- an inspection probe for inspecting the wafer it is necessary to arrange a very large number of inspection electrodes. Since it is necessary, the inspection probe becomes extremely expensive, and when the pitch of the electrodes to be inspected is small, it is difficult to produce the inspection probe itself.
- a wafer is generally warped, and the state of the warp is different for each product (wafer). Therefore, for a large number of electrodes to be inspected on the wafer, each of the inspection electrodes of the inspection probe is used. It is practically difficult to make stable and reliable contact.
- 25 is an explanatory cross-sectional view showing a configuration of an example of a conventional probe card including an inspection circuit board 85, an anisotropic conductive sheet 80, and a sheet-like probe 90.
- a test circuit board 85 having a large number of test electrodes 86 formed in accordance with a pattern corresponding to the pattern of the test target electrode of the test target circuit device is provided on one surface.
- a sheet-like probe 90 is arranged via an anisotropic conductive sheet 80.
- the anisotropic conductive sheet 80 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.
- Various structures are known as a strong anisotropic conductive sheet.
- Patent Document 2 and the like disclose an anisotropic conductive sheet obtained by uniformly dispersing metal particles in an elastomer. (Hereinafter referred to as “dispersion type anisotropic conductive sheet”).
- Patent Document 3 discloses that conductive magnetic particles are non-uniformly distributed in an elastomer, so that a large number of conductive portions extending in the thickness direction and an insulating portion that insulates them from each other.
- An anisotropic conductive sheet (hereinafter, referred to as a “uniformly distributed anisotropic conductive sheet”) having a layer formed thereon is disclosed.
- Patent Document 4 disclose an uneven anisotropic conductive sheet in which a step is formed between the surface of a conductive part and an insulating part.
- Such a sheet-like probe 90 has a flexible insulating sheet 91 made of, for example, resin, on which a plurality of electrode structures 95 extending in the thickness direction are inspected. They are arranged according to the pattern corresponding to the electrode pattern.
- Each of the electrode structures 95 includes a projecting surface electrode portion 96 exposed on the surface of the insulating sheet 91 and a plate-shaped back electrode portion 97 exposed on the back surface of the insulating sheet 91.
- the insulating sheet 91 is integrally connected via a short-circuit portion 98 extending through the insulating sheet 91 in the thickness direction.
- Such a sheet probe 90 is generally manufactured as follows.
- a laminated body 90A having a metal layer 92 formed on one surface of an insulating sheet 91 is prepared, and as shown in FIG. To its thickness A through hole 98H penetrating in the direction is formed.
- the resist film 93 is removed from the metal layer 92, and as shown in FIG. 26 (d), a resist film 94A is formed on the surface of the insulating sheet 91 including the surface electrode portion 96, Metal layer
- a resist film is formed according to the pattern corresponding to the pattern of the back electrode portion to be formed.
- the exposed portion of the metal layer 92 is removed to form the back electrode 97, and the electrode structure is formed. Body 95 is formed.
- the surface electrode portion 96 of the electrode structure 95 of the sheet-like probe 90 is arranged on the circuit device to be inspected, for example, on the surface of the wafer so as to be positioned on the inspection electrode of the wafer. Is done.
- the anisotropic conductive sheet 80 is pressed by the back surface electrode portion 97 of the electrode structure 95 in the sheet probe 90.
- a conductive path is formed on the anisotropic conductive sheet 80 between the back electrode portion 97 and the test electrode 86 of the test circuit board 85 in the thickness direction thereof. Electrical connection between the electrode and the test electrode 86 of the test circuit board 85 is achieved.
- the anisotropic conductive sheet 80 is deformed in accordance with the degree of warpage of the wafer, so that a large number of inspected wafers can be inspected. Ensures good electrical connection to each of the electrodes can do.
- the distance W from the periphery of the surface electrode part 96 to the periphery of the short-circuit part 98 is equal to the protrusion height h of the surface electrode part 96.
- the diameter R of the obtained surface electrode portion 96 is considerably larger than twice the protruding height h.
- the electrodes to be inspected in the circuit device to be inspected are minute and extremely small and are arranged at a pitch, it is not possible to secure a sufficient distance between the adjacent electrode structures 95. As a result, in the obtained sheet probe 90, the flexibility of the insulating sheet 91 is lost, and it is difficult to achieve stable electrical connection to the circuit device to be inspected.
- the protruding height h of the surface electrode portion 96 there is a means for reducing the protruding height h of the surface electrode portion 96.
- the diameter r of the short-circuit portion 98 (the cross-sectional shape is circular) If not, the shortest length is shown.) That is, a means for reducing the diameter of the through-hole 98H of the insulating sheet 91 may be considered.
- the short-circuit portion 98 and the surface electrode portion 96 are formed by electrolytic plating. The formation itself becomes difficult.
- Patent Documents 5 and 6 disclose a large number of electrode structures each having a tapered surface electrode portion having a smaller diameter toward a distal end. A sheet-like probe arranged is proposed.
- a resist film 93A and a front-side metal layer 92A are formed in this order on the surface of the insulating sheet 91, and a back-side metal layer 92B is laminated on the back surface of the insulating sheet 91.
- a laminated body 90B is prepared.
- an electrode structure forming recess 90K having a tapered shape adapted to the short-circuit portion and the front surface electrode portion of the electrode structure to be formed is formed on the back surface of the laminated body 90B.
- the surface-side metal layer 92A in the laminated body 90B is subjected to plating processing as an electrode, so that the metal is filled in the electrode structure forming recess 90K, and the surface electrode 96 and the short-circuit are formed.
- Form part 98 is shown in FIG. 28 (c)
- the sheet probe described in Patent Document 6 is manufactured as follows.
- the surface side metal layer 92A is formed on the surface of the insulating sheet material 91A having a greater thickness than the insulating sheet in the sheet-like probe to be formed, and the insulating sheet material 91A
- a laminate 90C is prepared by laminating a backside metal layer 92B on the backside of the substrate.
- the metal layer 92A in the laminated body 90C is subjected to a plating process as an electrode to fill the electrode structure forming recess 90K with metal as shown in Fig. 29 (c).
- a surface electrode part 96 and a short-circuit part 98 are formed.
- FIG. 29 (d) As shown in (2), an insulating sheet material 91A having a required thickness is formed and the surface electrode portion 96 is exposed.
- the back side electrode portion 97 is formed, and the sheet probe 90 is obtained as shown in FIG. 29 (e).
- the surface electrode portion 96 since the surface electrode portion 96 is tapered, the surface electrode portion 96 having a small diameter and a high protruding height is connected to the surface electrode portion 96 of the adjacent electrode structure. It can be formed in a state where the separation distance from 96 is sufficiently ensured.
- each surface electrode portion 96 of the electrode structure 95 is molded with the electrode structure forming recess 90K formed in the laminate as a cavity, the protrusion height of the surface electrode portion 96 is limited. The roughness is small! /, And the electrode structure 95 is obtained.
- the periphery of the insulating sheet 91 of the sheet-like probe 90 supports the insulating sheet 91 due to its rigidity.
- a support plate 99 is provided.
- the support plate 99 and the insulating sheet 91 are bonded and fixed by the adhesive 100 as shown in FIG.
- Patent Document 1 JP-A-7-231019
- Patent Document 2 JP-A-51-93393
- Patent Document 3 JP-A-53-147772
- Patent Document 4 JP-A-61-250906
- Patent Document 5 JP-A-11-326378
- Patent Document 6 JP-A-2002-196018
- Patent Document 7 Japanese Patent Application Laid-Open No. 2004-172589 Disclosure of the invention
- the diameter of the surface electrode portion in the electrode structure is equal to or smaller than the diameter of the short-circuit portion, that is, the diameter of the through hole formed in the insulating sheet. Therefore, the electrode structure also loses the back surface force of the insulating sheet, and it is difficult to actually use the sheet probe.
- a holding portion is provided on a front electrode portion side of a tapered electrode structure having a small diameter disclosed in Patent Document 7, and the electrode structure is formed on the back surface of an insulating sheet. Sheet-like probes that prevent force dropout have been proposed.
- a five-layer laminated material including the front-side metal layer 92A, the insulating sheet 11, the first back-side metal layer 92C, the insulating layer 18B, and the second back-side metal layer 92B.
- an opening 92H is provided in the second backside metal layer 92B of the laminate 90C, and the insulating layer 18B is etched from the opening 92H to form the insulating layer 1B. 8B has a through hole.
- the first back-side metal layer 92C exposed at the bottom of the through hole of the insulating layer 18B is etched to expose the insulating sheet 11 at the bottom of the through hole.
- the insulating sheet 11 is etched through the through hole of the first backside metal layer 92C to expose the front side metal layer 92A at the bottom of the through hole.
- a concave portion 90K for forming an electrode structure having a tapered shape conforming to the short-circuit portion 98 and the surface electrode portion 96 of the electrode structure 95 to be formed is formed on the back surface of the laminate 90C.
- the metal layer 92A in the stacked body 90C is subjected to a plating process as an electrode, thereby filling the metal into the electrode structure forming recess 90K as shown in FIG. 32 (c).
- a surface electrode part 96 and a short-circuit part 98 are formed.
- the front side metal layer 92A of the laminate 90C is removed, and the insulating sheet 11 is removed by etching the insulating sheet 11 to expose the first back side metal layer 92C. (Fig. 32 (d)).
- the holding portion 92D is formed by etching the first backside metal layer 92C, and the second backside metal layer 92B is partially etched and removed by etching.
- the back electrode portion 97 and the support portion 92E are formed, and a sheet-like probe 90 is obtained as shown in FIG.
- an electrode structure having a tapered shape adapted to the short-circuit portion and the surface electrode portion of the electrode structure to be formed is formed on the back surface of the laminate 90C. Since the recess 90K is formed, the tip diameter 92T of the electrode structure forming recess is smaller than the diameter of the opening 92H formed on the back surface of the laminated body 90C.
- a pattern of a photoresist film 83 having an opening 92H at a portion where the through hole is formed is formed on one surface of the second backside metal layer 92B as shown in FIG. It can be obtained by forming a through-hole in the insulating layer 18B made of polyimide and the insulating sheet 11 by immersing in an etchant and performing etching.
- a through-hole 81a is formed in which the front-side metal layer 92A laminated on the insulating sheet 11 is exposed at the bottom surface, and the step of performing electroplating using the front-side metal layer 92A as a common electrode is performed. Through this, an electrode structure is formed.
- the through hole 81a becomes tapered as shown in FIG. The diameter gradually decreases.
- the through hole for forming the electrode structure is formed by insulating polyimide. If the thickness of the insulating layer 18B, the surface of which is covered with the photoresist film 83, and the thickness t2 of the insulating sheet 11 increase, the surface side metal layer 92
- the etching angle ⁇ in the etching process is generally considered to be 45 ° to 55 °, which is assumed to vary depending on the processing conditions.
- the through hole 81a cannot be reliably formed in the insulating layer.
- the arrangement pitch of the electrode structure of the sheet-like probe is also shortened.
- the force is usually 100 to 120 / ⁇ .
- the width of the insulating portion between them is, for example, 40%. ⁇ 50 ⁇ m is required.
- the thickness of the polyimide film is limited.
- the arrangement pitch of the electrode structures is 120 m
- the opening diameter ⁇ 1 of the through hole 81a is 70 m.
- the thickness t of the polyimide film to be used needs to be 35 ⁇ m or less, and the thickness t must be further reduced in order to increase the opening diameter ⁇ 2 on the bottom surface to a certain degree or more.
- the opening diameter ⁇ 1 of the through-hole 81a must be 100 ⁇ m or more, and the Since it is difficult to establish insulation between adjacent polyimide films of the pole structure, it is impossible to increase the opening diameter ⁇ 1 according to the thickness of the polyimide film.
- the electrode structure is formed in the tapered through-hole 81a as shown in FIG. 33, if the opening diameter ⁇ 2 on the back side in the etching direction is small, the electric resistance increases, so the opening diameter of this small diameter portion It is desirable that ⁇ 2 be as large as possible.
- the small-diameter portion affects the electric resistance value, and thus the variation of the electric resistance value between the electrode structures provided on the sheet-like probe. There is also a concern that will increase.
- a sheet-like probe that can reliably achieve a stable electrical connection state with respect to the electrode structure, and has high durability without the electrode structure falling off from the insulating layer. It is in.
- An object of the present invention is to provide an electrode structure having an electrode structure having a surface electrode portion having a large thickness of an insulating layer and a small diameter, and which is stable even for a circuit device having electrodes formed at a small pitch.
- An object of the present invention is to provide a high-durability sheet-like probe that can reliably achieve a stable connection state.
- An object of the present invention is to form an electrode structure having a surface electrode portion with a small variation in protruding height, and to provide a stable electrical device even for a circuit device having electrodes formed at a small pitch. It is an object of the present invention to provide a method capable of manufacturing a sheet-like probe that can reliably achieve a connection state and that has high durability without an electrode structure falling off from an insulating layer.
- the present invention can be applied to a burn-in test even when a test object is a large-area wafer having a diameter of 8 inches or more or a circuit device having an extremely small pitch of 100 ⁇ m or less.
- it is intended to provide a sheet-like probe capable of reliably preventing a displacement between an electrode structure and an electrode to be inspected due to a temperature change, thereby stably maintaining a good electrical connection state, and a method of manufacturing the same.
- An object of the present invention is to provide a method of manufacturing a sheet-like probe that can be adjusted to a desired diameter in a sheet-like probe made of an insulating layer having a large thickness, in which the front end diameter / base end diameter of the surface electrode portion is adjusted to a desired diameter.
- An object of the present invention is to provide a probe card provided with the above-mentioned sheet probe.
- An object of the present invention is to provide an inspection device for a circuit device provided with the above-mentioned probe card.
- a sheet-like probe having a contact film provided with a plurality of electrode structures extending through the insulating layer in a thickness direction thereof, the contact probes being arranged on the insulating layer so as to be spaced apart from each other in a surface direction thereof,
- Each of the electrode structures is a
- the insulating layer extends from the base end of the front electrode portion continuously through the insulating layer in the thickness direction, and comprises a short-circuit portion connected to the back electrode portion,
- a diameter of a base end of the surface electrode portion is larger than a diameter of an end of the short-circuit portion on a side in contact with the surface electrode portion.
- the front surface electrode portion is formed by a front end portion and a base end portion, and the inclination angle of the side surface of the front end portion is different from the inclination angle of the side surface of the base end portion.
- the front end portion and the base end portion of the surface electrode portion are formed of different metals.
- the method for producing a sheet probe of the present invention comprises:
- the method for producing a sheet-like probe of the present invention comprises:
- a resist layer having a pattern hole is formed on the surface of the surface electrode forming metal sheet at a position where the front end portion of the surface electrode portion is erected, the metal is filled in the resist hole, and the resist layer is removed.
- the present invention is characterized in that a metal sheet member for forming a front electrode on which a front end portion of the front electrode portion is provided is prepared.
- the method for producing a sheet probe of the present invention comprises:
- the present invention is characterized in that a metal sheet member for forming a front electrode is provided in which the front end portion of the front electrode portion is erected by filling a metal into the through hole and removing the resin layer.
- a probe card for making an electrical connection between a circuit device to be inspected and a tester
- An inspection circuit board on which a plurality of inspection electrodes are formed corresponding to the electrodes to be inspected of the circuit device to be inspected;
- An anisotropic conductive connector arranged on the inspection circuit board
- the circuit device to be inspected is a wafer on which a large number of integrated circuits are formed.
- a frame plate in which a plurality of openings are formed corresponding to electrode regions where electrodes to be inspected are arranged in all or some integrated circuits formed on a wafer to be inspected;
- the circuit device inspection device of the present invention is a circuit device inspection device of the present invention.
- the wafer inspection method of the present invention includes:
- any one of the above-described probe cards may be electrically connected to a tester to perform an electrical test on each of the integrated circuits.
- the diameter of the base end of the surface electrode portion of the electrode structure is larger than the diameter of the end of the short-circuit portion on the side in contact with the surface electrode portion.
- the electrode structure does not fall off the insulating layer, and high durability can be obtained.
- the surface electrode portion of the electrode structure is formed by the distal end portion and the proximal end portion, and since the inclination angles of the side surfaces of the distal end portion and the proximal end portion are different, By increasing the angle of inclination of the side surface of the part, it is possible to increase the protruding height of the distal end part while appropriately increasing the diameter of the distal end, and to reduce the inclination angle of the side surface of the base end part to reduce the proximal end. It is possible to increase the diameter of the portion in contact with the insulating layer, that is, the diameter of the base end.
- the diameter of the base end of the surface electrode portion can be reduced.
- the structure can be easily formed, and the protruding height of the surface electrode part is large, so the electrode structure of the sheet probe is insulated even if the diameter of the surface electrode part is small. High durability is obtained without falling off from the layer.
- the diameter of the surface electrode portion is small and the protruding height is large, for example, the periphery of the electrode to be inspected of the object to be inspected is thick! Even if it has a structure, electrical connection is easily made.
- the surface electrode portion When the diameter of the front electrode is larger than the diameter of the short-circuit part, insulation between adjacent electrode structures is secured, and the thickness of the insulating layer is large. Therefore, the strength of the insulating layer is high so that the electrode structure does not fall off from the insulating layer, and high durability can be obtained.
- the method for manufacturing a sheet-shaped probe of the present invention even if the insulating layer has a thickness of 1Z2 or more, it is not necessary to increase the opening diameter. Also, a short-circuited part is formed upright on the back surface electrode forming metal sheet member of the electrode structure, and this height is set to a height of 1Z2 or more of the opening diameter of the insulating layer, so that the etching process can be performed.
- the probe card of the present invention since the probe card is provided with the above-mentioned sheet-like probe, it is possible to reliably achieve a stable electrical connection state even to a circuit device having electrodes formed at a small pitch.
- the inspection object that does not fall off the electrode structure of the sheet probe is a large-area wafer with a diameter of 8 inches or more, and the circumference of the electrode is extremely small with an insulating layer that has a very small pitch. Even in a circuit device having an electrode to be inspected that is difficult to contact, a good electrical connection state can be stably maintained, so that high durability can be obtained.
- the electrodes to be inspected are formed at a small pitch, and the electrodes to be inspected are surrounded by the insulating layer.
- a stable electrical connection state can be reliably achieved even for a circuit device that has been used, and even when a large number of circuit devices are tested, a highly reliable test can be performed over a long period of time. .
- FIG. 1 is a view showing another embodiment of the sheet-like probe of the present invention
- FIG. 1 (a) is a plan view
- FIG. 1 (b) is a cross-sectional view taken along line XX. .
- FIG. 2 is an enlarged plan view showing a contact film in the sheet-like probe of FIG. 1.
- FIG. 3 is an explanatory sectional view showing a structure of a sheet-like probe according to the present invention.
- FIG. 4 is an explanatory cross-sectional view showing, on an enlarged scale, an electrode structure of a sheet-like probe according to the present invention.
- FIG. 5 is a cross-sectional view showing an embodiment of the sheet-shaped probe of the present invention.
- FIG. 6 (a) is a cross-sectional view showing a case where a plate-like support is used as a support and an insulating layer is supported on its surface
- FIG. 6 (b) is a sheet-like probe of the present invention.
- FIG. 4 is a cross-sectional view of a support portion of the contact film in FIG.
- FIG. 7 is an explanatory sectional view showing a structure of a sheet-like probe according to the present invention.
- FIG. 8 is an explanatory cross-sectional view showing a configuration of a laminated body for manufacturing the sheet probe according to the present invention.
- FIG. 9 is an explanatory cross-sectional view showing a configuration of a laminated body for manufacturing the sheet probe according to the present invention.
- FIG. 10 is an explanatory cross-sectional view showing a configuration of a laminate for manufacturing a sheet-like probe according to the present invention.
- FIG. 11 is an explanatory cross-sectional view showing a configuration of a laminate for manufacturing the sheet-like probe according to the present invention.
- FIG. 12 is an explanatory cross-sectional view showing a configuration of a laminate for manufacturing a sheet-like probe according to the present invention.
- FIG. 13 is an explanatory cross-sectional view showing a configuration of a laminated body for manufacturing the sheet probe according to the present invention.
- FIG. 14 is an explanatory cross-sectional view showing a configuration of a laminated body for manufacturing the sheet probe according to the present invention.
- FIG. 15 is an explanatory cross-sectional view showing a configuration of a laminate for manufacturing a sheet-like probe according to the present invention.
- FIG. 16 is a cross-sectional view showing another embodiment of a circuit device inspection device and a probe force used in the device according to the present invention.
- FIG. 17 is a cross-sectional view showing each state of the probe card of FIG. 16 before and after assembly.
- FIG. 18 is an explanatory cross-sectional view showing a probe card in the inspection device shown in FIG. 16 in an enlarged manner.
- FIG. 19 is a plan view of an anisotropic conductive connector in the probe card shown in FIG.
- FIG. 20 is a plan view showing a test wafer produced in the example.
- FIG. 21 is an explanatory view showing the position of an electrode area to be inspected of an integrated circuit formed on the test wafer shown in FIG.
- FIG. 22 is an explanatory diagram showing an arrangement pattern of electrodes to be inspected of an integrated circuit formed on the test wafer shown in FIG. 21.
- FIG. 23 is a plan view showing a frame plate in the anisotropic conductive connector manufactured in the example.
- FIG. 24 is an explanatory diagram showing a part of the frame plate shown in FIG. 23 in an enlarged manner.
- FIG. 25 is an explanatory sectional view showing a configuration of an example of a conventional probe card.
- FIG. 26 is an explanatory cross-sectional view showing an example of manufacturing a conventional sheet-like probe.
- FIG. 27 is an explanatory cross-sectional view showing an enlarged sheet-like probe in the probe card shown in FIG. 26.
- FIG. 28 is an explanatory cross-sectional view showing another example of manufacturing a conventional sheet-like probe.
- FIG. 29 is an explanatory cross-sectional view showing another example of manufacturing a conventional sheet-like probe.
- FIG. 30 is a cross-sectional view of a conventional sheet probe using a ring-shaped support plate.
- FIG. 31 is a schematic cross-sectional view showing a method of bonding a ring-shaped support plate to a conventional sheet-like probe.
- FIG. 32 is a schematic cross-sectional view showing a method of bonding a ring-shaped support plate to a conventional sheet-like probe.
- FIG. 33 is a schematic diagram for explaining through holes of a conventional sheet-like probe.
- Air inlet hole H Pattern hole Anisotropic conductive sheet conductive part
- FIG. 1 is a diagram showing another embodiment of the sheet-shaped probe of the present invention, wherein FIG. 1 (a) is a plan view, FIG. 1 (b) is a cross-sectional view taken along line X-X, and FIG. FIG. 3 is an enlarged plan view showing a contact film of the sheet-like probe in FIG. 1, FIG. 3 is a cross-sectional view for explaining the structure of the sheet-like probe according to the present invention, and FIG. 4 is a sheet-like probe according to the present invention.
- FIG. 2 is an explanatory cross-sectional view showing the electrode structure of FIG.
- the sheet-like probe 10 of the present embodiment is used for performing an electrical inspection of each integrated circuit in a wafer state on an 8-inch wafer or the like on which a plurality of integrated circuits are formed.
- the probe 10 has a support body 25 having through holes formed at respective positions corresponding to the respective integrated circuits on the wafer to be inspected.
- the contact film 9 is supported by the support 25 at a support 27 around the through hole of the support 25.
- the support 27 is placed on the support 25 as shown in FIG.
- a contact film 9 made of an insulating film is formed on the substrate, and the support film 25 supports the contact film 9.
- the contact film 9 has a structure in which the electrode structure 15 is formed through a flexible insulating layer 18B.
- the sheet probe 10 shown in FIG. 3 is used as a probe for performing an electrical inspection of a circuit device, and has a flexible insulating layer 18B and a support 25.
- a plurality of electrode structures made of metal extending in the thickness direction of the insulating layer 18B are separated from each other in a plane direction of the insulating layer 18B according to a pattern corresponding to a pattern of an electrode to be inspected of a circuit device to be inspected. It is arranged and is.
- Each of the electrode structures 15 is exposed on the surface of the insulating layer 18B and protrudes from the surface of the insulating layer 18B, and has a rectangular flat plate exposed on the back surface of the insulating layer 18B. And a short-circuit portion 18 connected to the back electrode portion 17 by continuously extending through the insulating layer 18B in the thickness direction thereof so that the base force of the front electrode portion 16 extends continuously. .
- the surface electrode portion 16 has a base force that is continuous with the short-circuit portion 18 and is in contact with the insulating layer 18B.
- a base portion 16C having a shape of a truncated cone and a truncated frustum-shaped tip portion 16B having a smaller diameter as it goes to the tip continuously from the base end 16C.
- the short-circuit portion 18 that is continuous with the base end of the surface electrode portion 16 is tapered so that the diameter becomes smaller as the insulating layer 18B faces the other surface.
- the diameter R6 of the proximal end of the end portion 16C is larger than the diameter R2 of one end of the short-circuit portion 18 continuous with the proximal end.
- the base end portion 16C of the surface electrode portion 16 has a smaller diameter in accordance with the direction toward the base end force contacting the insulating layer 18B, and has a side surface inclined angle c.
- the front end portion 16B of the front electrode portion is continuous with the base end portion 16C, and has a smaller diameter toward the front end.
- the inclination angle c of the side surface of the base end portion 16C is different from the inclination angle b of the tip end portion 16B, and in the present embodiment, the inclination angle b of the side surface of the tip end portion 16B is The angle of inclination of the side surface of section 16C is smaller than c.
- the insulating layer 18B is not particularly limited as long as it is flexible and has insulating properties.
- polyimide resin, liquid crystal polymer, polyester, or the like can be used.
- polyimide which is preferably made of an etchable material, is preferable in that a through hole for forming a layer can be easily formed by etching.
- the thickness d of the insulating layer 18B is not particularly limited as long as the insulating layer 18B is flexible, but is preferably 5 to 100 / zm, more preferably 10 to 50 / zm. ⁇ ⁇ .
- the support 25 is provided integrally with the insulating layer 18B, and is included as an intermediate layer in the insulating sheet which may be provided on the surface of the insulating sheet in a state of being laminated with the insulating layer 18B. Is also good.
- the support 25 is disposed apart from the electrode structure 15, and the electrode structure 15 and the support 25 are connected by the insulating sheet 11, so that the electrode structure 15 and the support 25 are electrically connected. It is electrically insulated.
- the support 25 is formed by removing a part of the second back side metal layer 17A.
- iron, copper, nickel, titanium or an alloy or alloy steel thereof can be used as the metal constituting the support 25.
- the alloy can be easily formed by an etching process.
- Iron-nickel alloy steels such as Kovar, copper, nickel and their alloys are preferred!
- the linear thermal expansion coefficient of 3 ⁇ ⁇ - 5 ⁇ more preferably it is preferred instrument using the following ones one 1 X 10- 7 ⁇ 1 X 10 " 5 / ⁇ , particularly preferably an 1 X 10- 6 ⁇ 8 X 10- 6 ⁇ .
- Specific examples of the material constituting such a support 25 include alloys or alloy steels such as Invar-type alloys such as Invar, Elinvar-type alloys such as Elinvar, super Invar, Kovar, and 42 alloys.
- the thickness of the support 25 is preferably from 3 to: LOO ⁇ m, more preferably from 5 to 50 ⁇ m.
- the thickness is too small, the strength required as a support for supporting the sheet-shaped probe may not be obtained.
- a large number of contact points are formed by etching the insulating sheet.
- the membrane 9 may be separated and supported on the support 25.
- the flexible contact films 9 holding the electrode structure 15 in the respective openings 26 of the support 25 are independent of each other (FIG. 5 (a)) and partially independent (FIG. 5 (b)). ).
- each of the contact films 9 has a flexible insulating layer 18B, and the insulating layer 18B extends in the thickness direction of the insulating layer 18B.
- a plurality of metal electrode structures 15 are spaced apart from each other in the surface direction of the insulating layer 18B in accordance with a pattern corresponding to the pattern of the electrode to be inspected in the electrode region of the wafer to be inspected. 9 is arranged so as to be located in the opening of the support 25.
- the electrode structure 15 nickel, copper, gold, silver, noradium, iron, or the like can be used.
- the electrode structure 15 the whole is made of a single metal.
- the surface electrode portion 16 and the short-circuit portion 18 may be made of different metals, even if they are made of an alloy of two or more metals or are made of a laminate of two or more metals.
- the distal end 16B and the proximal end 16C of the surface electrode portion may be made of different metals.
- the electrode to be inspected is made of, for example, tin, which is an easily diffused metal.
- tin which is an easily diffused metal.
- the highly conductive metal having a Vickers hardness ( ⁇ ) of 40 or more palladium, rhodium, ruthenium, iridium, platinum, tungsten, nickel, conoreto, chromium, or an alloy thereof can be used. Among them, palladium, rhodium, ruthenium, iridium, and platinum are preferably used because they are chemically stable and have high conductivity.
- an alloy of a metal and gold having a Vickers hardness (Hv) force of 0 or more gold-palladium alloy, gold-copper alloy, platinum-gold alloy, nickel or cobalt is 0.1 to 1.0%. Hard gold can be used.Of these, 0.1 to 1.0% of gold-palladium alloy, nickel, and cobalt are contained because they are chemically stable and have high conductivity. It is preferable to use hard gold.
- the ratio (R2 / R1) of the diameter R2 at the distal end to the diameter R1 at the proximal end of the surface electrode portion 16 is preferably 0.11 to 1, more preferably 1 to 11. It is 0.15 to 0.9.
- the arrangement pitch of the electrode structures 15 is preferably a force of 40 to 160 ⁇ m, which is the same as the pitch of the electrodes to be inspected of the circuit device to be connected, and is preferably 40 to 120 ⁇ m. In particular, it is more preferably 40 to: L00 ⁇ m.
- Circuit devices to be connected by satisfying such conditions include those having small and minute electrodes with a pitch of 120 m or less and those having extremely small electrodes with a pitch of 100 m or less. Even so, a stable electrical connection state to the circuit device can be reliably obtained.
- the diameter R6 of the base end 16C of the surface electrode portion is preferably 30 to 70% of the pitch of the electrode structure 15, more preferably 35 to 60%.
- the ratio hZR6 of the protruding height MH1 + H2) to the diameter R6 of the base end 16C of the base end 16C of the surface electrode portion is preferably from 0.4 to 1.5, more preferably from 0.5 to 1.5. 1.2.
- Circuit devices to be connected by satisfying such conditions include those having small and minute electrodes with a pitch of 120 m or less and those having extremely small electrodes with a pitch of 100 m or less. Even so, the electrode structure 15 having a pattern corresponding to the electrode pattern can be easily formed, and a stable electrical connection state to the circuit device can be more reliably obtained.
- the diameter R2 of the tip 16B of the surface electrode portion is a force set in consideration of the above conditions, the diameter of the electrode to be connected, and the like, for example, 5 to 80 ⁇ m, and preferably 20 to 60 ⁇ m. It is.
- the height of the protruding height MH1 + H2) of the surface electrode portion 16 is preferably 15 to 80 m in that a stable electrical connection to the electrode to be connected can be achieved. Like Or 20 to 60 ⁇ m.
- the protruding height H2 of the base end portion 16C of the surface electrode portion is such that stable electrical connection to the electrode to which the surface electrode portion is to be connected can be achieved, and that the electrode structure 15 has an insulating layer.
- the thickness is preferably 4 to 30 m, more preferably 5 to 20 ⁇ m.
- the protruding height HI of the tip portion 16B of the surface electrode portion is such that a stable electrical connection can be achieved to the electrode to which the surface electrode portion is to be connected, and the strength of the tip portion of the surface electrode portion. It is preferably 10 to 50 / ⁇ from the viewpoint of holding and suppressing deformation during repeated use.
- the inclination angle c of the side surface of the base end portion 16C of the front electrode portion is preferably 30 ° to 60 °, more preferably 40 ° to 55 °.
- This angle can be easily formed by, for example, forming an etching hole in the polyimide layer using an etching solution and filling the hole with a metal or the like.
- the inclination angle b of the side surface of the tip portion 16B of the surface electrode portion is preferably 70 ° to 90 °, more preferably 80 ° to 85 °.
- This angle can be easily determined by, for example, forming a through hole by laser processing the polyimide layer, or forming a pattern hole by exposing the resist layer, and filling the metal with a metal or other means. Can be achieved.
- the outer diameter R5 of the back electrode 17 is larger than the diameter R4 of the back surface of the insulating layer 18B of the short-circuit portion 18 connected to the back electrode 17 and smaller than the pitch of the electrode structure 15.
- the sheet is as large as possible, so that a stable electrical connection can be reliably achieved even for an anisotropic conductive sheet, for example.
- the thickness d2 of the back electrode portion 17 is preferably 10 to 80 m, more preferably 12 to 60 m, from the viewpoint that the strength is sufficiently high and excellent repetition durability is obtained. is there.
- the ratio R3ZR4 of the diameter R3 on the front surface side of the insulating layer 18B to the diameter R4 on the back surface side of the insulating layer 18B of the short-circuit portion 18 is preferably 0.2 to 1, more preferably 0.2 to 1. 3 to 0.9.
- the diameter R3 of the surface of the insulating layer 18B of the short-circuit portion 18 is equal to the pitch 10 of the electrode structure 15. It is preferably from 50 to 50%, more preferably from 15 to 45%.
- the insulating layer 18B in addition to the structure in which the insulating layer 18B is supported by the support 25 as shown in FIG. 6A, the insulating layer 18B as shown in FIG. A structure having a porous film 24 therein is also possible.
- the structure of the sheet probe 10 shown in FIG. 6B is as shown in FIG.
- the method of manufacturing the sheet probe 10 of the present invention shown in FIG. 7 has basically the same configuration except that the insulating layer 18B is supported by the support 25 or the porous film 24.
- the porous membrane 24 of the sheet-like probe of the type in which the insulating layer 18B is supported by the porous membrane 24 is a flexible porous membrane, for example, a mesh or nonwoven fabric that also has an organic fiber strength. Can be used.
- Examples of the organic fibers forming the mesh or the nonwoven fabric include fluorinated resin fibers such as aramide fibers, polyethylene fibers, polyarylate fibers, nylon fibers, and polytetrafluoroethylene fibers, and polyester fibers.
- fluorinated resin fibers such as aramide fibers, polyethylene fibers, polyarylate fibers, nylon fibers, and polytetrafluoroethylene fibers, and polyester fibers.
- a mesh having a synthetic fiber strength for example, a fiber diameter of 15 to: LOO ⁇ m, and a mesh opening diameter of 2
- Those having a size of 0 to 200 ⁇ m can be used.
- a membrane filter made of polytetrafluoroethylene and having an opening diameter of about 1 to 5 ⁇ m may be used.
- stainless steel and aluminum may be used as the metal that forms the mesh that can be used even when a mesh having a metallic force is used as the porous film 24.
- the supporting portion 27 of the contact film 9 has a structure in which the porous film 24 and the insulating layer 18B are integrally formed, so that the sheet-like probe having a high fixing strength is formed. As compared with the electrical inspection by the inspection device using the probe 10, high and repeated durability can be obtained.
- a method of supporting the insulating layer 18B may be appropriately selected in consideration of manufacturing costs and the like.
- the protective film 40A of the surface electrode forming metal sheet 16A is provided, and the resist layer 22 is formed on the surface on the other side.
- each opening 23 is filled with metal to form a tip 16B of the surface electrode (FIG. 8).
- the resist layer 22 was removed to obtain a surface electrode forming metal sheet 16A in which the front end portion 16B of the surface electrode portion was erected at a predetermined position (FIG. 9 (a)).
- the front end portion 16B is positioned inside the opening on the side of the front electrode forming metal sheet 16A on which the front end portion 16B is formed, with the front end portion 16B of the front electrode portion standing upright at a predetermined position. Then, the spacer 39 is laminated (FIG. 9 (b)).
- the thickness of the spacer 39 is the same as the thickness h of the surface electrode portion to be formed, that is, the sum of the thickness H2 of the 16B at the distal end portion and the thickness HI of the proximal end portion.
- the spacer 39 has an opening at a position corresponding to the electrode structure to be formed.
- the spacer 39 is formed of metal, resin, or the like, and has a flat surface to be detached from the sheet probe later. It is preferable to use a material coated with Teflon (registered trademark) or the like.
- a liquid resin material is applied to the inside of the opening of the spacer 39 and cured to form a resin layer 55 so as to cover the tip portion 16B of the surface electrode portion (FIG. 9 (c)). .
- polyimide which is easily etched is preferable.
- the resin layer 55 is formed of polyimide
- the resin layer 55 is formed using a thermosetting polyimide, a photosensitive polyimide, a varnish or solution of a polyimide obtained by diluting a polyimide precursor in a solvent.
- the application and curing of the liquid resin material is repeated a plurality of times to form the resin layer 55 in the opening of the spacer 39. It is preferable to form the resin layer 55 so as to cover the tip 16B. [0138] Further, since the thickness of each formed resin layer 55 may vary, the resin layer 55
- the formed resin layer 55 is polished and flattened in accordance with the height of the spacer 39 to form a resin layer 55 having a uniform thickness. It is preferable to form a uniform electrode structure.
- a plurality of pattern holes were formed according to a pattern corresponding to the pattern of the base end portion 16C of the electrode structure 15 to be formed.
- a resist film 28A for etching is formed (FIG. 10A).
- the diameter of the pattern hole 34H of the resist film 28A for etching is the same as the diameter R6 of the base end 16C of the surface electrode to be formed.
- the resin layer 55 is etched through the pattern hole 34H of the resist film 28A to form an opening 52, and the tip 16B of the surface electrode portion is exposed at the bottom (FIG. 10B).
- Examples of the etchant for etching the resin layer 55 include amine-based etchants.
- a hydrazine-based aqueous solution a potassium hydroxide aqueous solution, or the like can be used.
- electrolytic plating is performed using the surface electrode forming metal sheet 16A as a common electrode.
- each opening 52 is filled with metal to form the base end 16C of the surface electrode.
- FIG. 11A This is referred to as a laminated body 10A (FIG. 11A).
- the laminated body 10A on which the front surface electrode portion 16 composed of the front end portion 16B and the base end portion 16C is formed in this manner is insulated so as to cover the front surface electrode portion 16 as shown in Fig. 11 (b).
- a layer 18B is formed, and a backside metal layer 17A is formed on the surface of the insulating layer 18B to form a laminate 10B.
- etchable polymer material As a material forming the insulating layer 18B, it is preferable to use an etchable polymer material, and more preferably, polyimide.
- a photosensitive polyimide solution, a polyimide precursor solution, and a liquid polyimide or varnish obtained by diluting a polyimide precursor or a low molecular weight polyimide with a solvent have low viscosity, so that the solution can be applied. Since it hardens (polymerizes) after application, volumetric shrinkage is caused by evaporation and polymerization of the solvent.
- a photosensitive polyimide solution a polyimide precursor solution, a liquid polyimide or a varnish obtained by diluting a polyimide precursor or a low-molecular polyimide with a solvent, apply these to the laminate 10A. It is preferable that the insulating layer 18A be formed by curing with heat.
- thermoplastic polyimide after being dissolved in a solvent and applied to the laminate 10A as a polyimide solution, the solvent is evaporated to form the insulating layer 18B, or a film of thermoplastic polyimide is laminated to the laminate 10A. Then, by heating and pressing, the insulating layer 18B can be integrally formed on the laminate 10A.
- a polyimide film is stable without being dissolved in heat or a solvent, when such a polyimide film is used, the polyimide film is laminated on the laminate 10A via a thermoplastic polyimide film and heated and pressed.
- the insulating layer 18B can be formed by a method of laminating on the laminate 10A, curing and integrating.
- an insulating layer 18B and a back-side metal layer 17A are formed by laminating a laminated polyimide sheet having a metal layer made of, for example, 42 alloy on one side thereof on the laminate 10A via an adhesive layer. Talk about this.
- the back metal layer 17A has a thickness equivalent to the thickness of the support 25 to be formed.
- An etching resist film 28A having a plurality of pattern holes 28H formed therein is formed in accordance with a pattern corresponding to the pattern of the electrode structure 15 to be formed.
- various materials used as a photoresist for etching can be used.
- the exposed portion of the backside metal layer 17A through the pattern hole 28H of the resist film 28A is etched to remove the portion, as shown in FIG.
- a plurality of pattern holes 17H communicating with the pattern holes 28H of the resist film 28A are formed in the layer 17A.
- the exposed portion of the insulating layer 18B through the respective pattern holes 28H of the resist film 28A and the respective pattern holes 17H of the backside metal layer 17A is subjected to an etching treatment to form a part of the insulating layer. Is removed.
- the diameter becomes smaller as the insulating layer 18B moves from the back surface to the front surface, and a plurality of tapered through holes 18H with the surface electrode portion 16 exposed at the bottom surface are formed. It is formed.
- the protective film 40A was removed, and the rear-surface-side metal layer 1 was formed on the rear surface of the laminate 10B.
- a plurality of short-circuit-portion-forming recesses 18K are formed by communicating the pattern holes 17H of 7A and the through holes 18H of the insulating layer 18B.
- an etching agent for etching back surface side metal layer 17A is appropriately selected according to the material constituting these metal layers.
- an etching solution for etching the insulating layer 18B As an etching solution for etching the insulating layer 18B, an amine-based etching solution, a hydrazine-based aqueous solution, a potassium hydroxide aqueous solution, or the like can be used. By selecting etching conditions, the back surface of the insulating layer 18B can be used. A tapered through hole 18H having a smaller diameter according to the directional force can be formed on the force surface.
- the resist film 28A is removed from the stacked body 10B in which the short-circuit-portion-forming recess 18K is formed as described above.
- a plurality of pattern holes 29H are formed in accordance with the pattern corresponding to the pattern of the back electrode portion 17 in the electrode structure 15 to be formed on the surface of the back metal layer 17A of the laminate 10B.
- the formed resist film 29A for plating is formed.
- a material for forming the resist film 29A various materials used as a photoresist for plating can be used, and a dry film resist is preferable!
- the surface electrode forming metal sheet 16A is covered with a protective film 40C.
- the laminated body 10B is subjected to electrolytic plating using the metal sheet 16A for forming a surface electrode as an electrode, thereby forming each of the recesses 18K for forming short-circuit portions and the pattern holes 2 of the resist film 29A.
- the short-circuit portion 18 extending continuously from the base end of the surface electrode portion 16 in the thickness direction and the insulating layer of the short-circuit portion 18 are formed.
- a back surface electrode portion 17 connected to the back surface side of 18B is formed.
- each of the back surface electrode portions 17 is connected to each other via a back surface side metal layer 17A.
- the resist film 29A is removed.
- a pattern-formed etching resist having a pattern hole 29K is formed on a portion of the rear-surface-side metal layer 17A serving as the rear electrode portion 17 and the support 25.
- a film 29B is formed.
- various materials used as a photoresist for etching can be used.
- the protective film 40C provided on the front electrode forming metal sheet 16A is removed, and the front electrode forming metal sheet 16A and the back side metal layer 17A are subjected to an etching treatment.
- the metal sheet 16A for forming the front electrode is removed, and at the same time, the portion of the back metal layer 17A exposed by the pattern hole 29K is removed to form the opening 26.
- a plurality of back electrode portions 17 and a support 25 separated from each other are formed.
- the resist film 17E is covered so as to cover the back electrode 17, the support 25, and the opening 26.
- a photoresist for etching is used as a material for forming the resist film 17E.
- Various types can be used.
- a protective film 40B is laminated on the entire surface of the resist film 17E.
- the resin layer 55 was subjected to an etching treatment to remove all of the resin layer 55, and as shown in FIG. 14 (b), a laminate 10C exposing the surface electrode portion 16 and the insulating layer 18B was obtained.
- a laminate 10C exposing the surface electrode portion 16 and the insulating layer 18B was obtained.
- the resist film 17F is removed from the surface of the insulating layer 18B, and the protective film 40B and the resist film 17E are removed from the back surface and the back electrode portion 17 of the insulating layer 18B.
- the electrode structure 15 is highly durable without falling off the back surface force of the insulating layer 18B. It is possible to manufacture the sheet probe 10 having the property.
- the insulating layer 18 having a large thickness is used.
- the recess 18K for forming a short-circuit portion that reliably communicates with the surface electrode portion 16 can be formed for B, and the electrode structure 15 having a large thickness of the short-circuit portion 18 can be formed.
- the sheet probe 10 including the thick insulating layer 18B can be reliably manufactured.
- the backside metal layer 17A constituting the laminated body 10B is etched to form the opening 26, so that the backside metal layer 17A is divided and separated to form the back electrode portion 17 and the support 25.
- a support 25 made of a metal that is integrated with the insulating layer 18B and is electrically insulated from the electrode structure 15 can be reliably manufactured.
- the sheet probe 10 can be obtained by a method other than the above. For example, after forming a through hole in which the electrode structure 15 is disposed in the insulating layer 18B, the inner surface force of the through hole is changed to the insulating layer 18B. An electroless plating is applied to the surface of the insulating layer 18B, and a resist pattern is formed on one or both sides of the insulating layer 18B where an opening pattern with a diameter equal to or larger than the diameter is formed at the position of the through hole.
- the electrode structure 15 can be formed by applying through-hole plating in a state where the strike film is provided.
- the protruding height of front surface electrode portion 16 or rear surface electrode portion 17 is defined by the height of the resist film or the like.
- FIG. 16 is an explanatory cross-sectional view showing a configuration of an example of a circuit device inspection device according to the present invention.
- the circuit device inspection device integrates each of a plurality of integrated circuits formed on a wafer. This is for performing an electrical inspection of a circuit in a state of a wafer.
- the inspection apparatus for such a circuit device includes a sheet-like probe 10 and a sheet-like probe that supports the insulating layer 18B with the porous film 24, as shown in FIG.
- the inspection apparatus of this circuit device includes a probe card 1 (insulating layer 18B supported by a support 25) for electrically connecting each of the electrodes 7 to be inspected on the wafer 6 as the circuit device to be inspected and the tester. Sheet-shaped probe).
- this probe card 1 As shown also in an enlarged manner in FIG. 18, a plurality of test electrodes 21 are formed in accordance with the pattern corresponding to the pattern of the test electrode 7 in all the integrated circuits formed on the wafer 6. It has an inspection circuit board 20 formed on the front surface (the lower surface in the figure).
- an anisotropic conductive connector 30 is disposed on the surface of the inspection circuit board 20, and the surface (lower surface in the figure) of the anisotropic conductive connector 30 is formed on the wafer 6.
- a sheet probe 10 having a configuration shown in FIG. 1 in which a plurality of electrode structures 15 are arranged according to a pattern corresponding to the pattern of the electrode 7 to be inspected in the integrated circuit of FIG.
- the sheet probe 10 is held in a state where the anisotropic conductive connector 30, the electrode structure 15, and the conductive portion 36 are fixed to each other by the guide pins 50.
- a pressure plate 3 for pressing the probe card 1 downward is provided on the back surface (upper surface in the figure) of the inspection circuit board 20 in the probe card 1, and a wafer 6 is placed below the probe card 1.
- a wafer mounting table 4 is provided, and the pressure plate 3 and the wafer A heater 5 is connected to each of the tables 4.
- such a circuit device inspection apparatus has a configuration as shown in FIGS. 17A and 17B, and is formed on the frame plate 31 of the anisotropic conductive connector 30. The positioning is performed by fitting the through-hole with the guide pin 50.
- the sheet-like probe 10 can be positioned by fitting the support plate 2 adhered to the outer edge of the porous film 24 and the concave portion of the pressure plate 3 to each other.
- the substrate material constituting the inspection circuit board 20 various conventionally known substrate materials can be used, and specific examples thereof include a glass fiber reinforced epoxy resin and a glass fiber reinforced phenol resin. And composite resin materials such as glass fiber reinforced polyimide resin and glass fiber reinforced bismaleimide triazine resin, and ceramic materials such as glass, silicon dioxide, and alumina.
- the linear thermal expansion coefficient is 3 X
- the anisotropic conductive connector 30 has a plurality of openings 32 corresponding to the electrode regions where the electrodes 7 to be inspected are arranged in all the integrated circuits formed on the wafer 6 as the circuit device to be inspected. And an anisotropic conductive sheet 35 which is arranged in the frame plate 31 so as to cover one opening 32 and is fixed and supported at the opening edge of the frame plate 31. It is configured.
- the material forming the frame plate 31 is not particularly limited as long as the frame plate 31 does not easily deform and has a rigidity enough to maintain its shape stably. Various materials such as ceramic materials and resin materials can be used. When the frame plate 31 is made of, for example, a metal material, an insulating coating may be formed on the surface of the frame plate 31. ,.
- Specific examples of the metal material forming the frame plate 31 include metals such as iron, copper, nickel, titanium, and aluminum, and alloys or alloy steels of a combination of two or more thereof. Is mentioned.
- Specific examples of the resin material forming the frame plate 31 include a liquid crystal polymer and a polyimide resin.
- the material for forming the frame plate 31 a coefficient of linear thermal expansion 3 X 10- 5 ZK following ones more preferably it is preferred instrument using an 1 X ⁇ - 7 ⁇ X IO K , particularly good Mashiku 1 X 10- 6 ⁇ 8 X 10- 6 ⁇ .
- Such a material include an Invar-type alloy such as Invar, an Elinvar-type alloy such as Elinvar, a magnetic metal alloy or alloy steel such as Super Invar, Kovar, and 42 alloy.
- the thickness of the frame plate 31 is not particularly limited as long as its shape is maintained and the anisotropic conductive sheet 35 can be supported. For example, it is preferably 25 to 600 ⁇ m, more preferably 40 to 400 ⁇ m.
- Each of the anisotropic conductive sheets 35 is formed of an elastic polymer material, and corresponds to the pattern of the electrode 7 to be inspected in one electrode region formed on the wafer 6 that is the circuit device to be inspected. It is composed of a plurality of conductive portions 36 formed in accordance with the pattern and extending in the thickness direction, and an insulating portion 37 for insulating each of these conductive portions 36 from each other.
- each of the conductive portions 36 in the anisotropic conductive sheet 35 contains conductive particles P exhibiting magnetism densely in a state of being aligned in the thickness direction.
- the insulating portion 37 contains no or almost no conductive particles P.
- the total thickness of the anisotropic conductive sheet 35 (the thickness of the conductive portion 36 in the illustrated example) is preferably 50 to 2000 ⁇ m, more preferably 70 to: LOOO ⁇ m, and particularly preferably 80 to 80 ⁇ m. 500 ⁇ m.
- the thickness is 50 ⁇ m or more, sufficient strength is obtained for the anisotropic conductive sheet 35.
- the thickness is 2000 / zm or less, the conductive portion 36 having the required conductive characteristics can be reliably obtained.
- the total height of the protrusions 38 is preferably 10% or more of the thickness of the protrusions 38, and more preferably 15% or more.
- the conductive portion 36 is sufficiently compressed with a small pressing force, so that good conductivity is reliably obtained.
- the protrusion height of the protrusion 38 is preferably 100% or less of the shortest width or diameter of the protrusion 38, more preferably 70% or less.
- the protruding portion 38 By forming the protruding portion 38 having such a protruding height, the protruding portion 38 does not buckle when pressed, so that the intended conductivity is reliably obtained.
- the elastic polymer material forming the anisotropic conductive sheet 35 a heat-resistant polymer material having a crosslinked structure is preferable.
- a liquid silicone rubber that can use various materials is preferable.
- the magnetic core particles for obtaining the conductive particles P preferably have a number average particle diameter of 3 to 40 ⁇ m.
- the number average particle diameter of the magnetic core particles refers to a value measured by a laser diffraction scattering method.
- the number average particle diameter is 3 ⁇ m or more, deformation under pressure is easy, the resistance value is low, and the connection reliability is high.
- the fine conductive portion 36 can be easily formed, and the obtained conductive portion 36 tends to have stable conductivity.
- the magnetic core particles iron, nickel, cobalt, or a material obtained by coating these metals with copper or resin can be used.
- the saturation magnetic force is 0.1 Wb / m. 2 or more can be preferably used, more preferably 0.3 Wb / m 2 or more, particularly preferably 0.5 WbZm 2 or more, specifically, iron, nickel, cobalt or Are alloys thereof.
- gold, silver, rhodium, platinum, chromium, and the like can be used as the highly conductive metal coated on the surface of the magnetic core particles.
- gold, silver, rhodium, platinum, chromium, and the like can be used.
- chemically stable and high conductivity It is preferable to use gold in terms of having.
- the ratio of the highly conductive metal to the core particles is 15% by mass or more, preferably 25 to 35% by mass. It is said.
- the proportion of the highly conductive metal is less than 15% by mass, when the obtained anisotropically conductive connector 30 is repeatedly used in a high-temperature environment, the conductivity of the conductive particles P is significantly reduced. The required conductivity cannot be maintained.
- the number average particle diameter of the conductive particles P is preferably 3 to 40 ⁇ m, more preferably 6 to 25 ⁇ .
- the anisotropic conductive sheet 35 obtained can be easily deformed under pressure, and sufficient electric contact can be obtained between the conductive particles in the conductive portion 36.
- the shape of the conductive particles ⁇ is not particularly limited, but is spherical, star-shaped, or spherical in that it can be easily dispersed in the polymer substance-forming material. It is preferred that these are aggregated secondary particles.
- the content of the conductive particles in the conductive portion 36 is preferably such that the volume fraction is 10 to 60%, preferably 15 to 50%.
- this ratio is less than 10%, the conductive portion 36 having a sufficiently low electric resistance may not be obtained.
- the resulting conductive portion 36 may be fragile or may not immediately have the necessary elasticity as conductive portion 36.
- the anisotropic conductive connector 30 as described above can be manufactured, for example, by the method described in JP-A-2002-324600.
- the wafer 6 to be inspected is mounted on the wafer mounting table 4, and then the probe card 1 is pressed downward by the pressing plate 3, whereby the sheet-like probe is pressed.
- Each force of the surface electrode part 16 in the ten electrode structures 15 Each of the electrodes 7 to be inspected on the wafer 6 is pressurized by each of the surface electrode portions 16 in contact with each of the electrodes 7 to be inspected.
- each of the conductive portions 36 of the anisotropic conductive sheet 35 of the anisotropic conductive connector 30 is connected to the test electrode 21 of the test circuit board 20 and the electrode structure 15 of the sheet probe 10. It is sandwiched by the back surface electrode portion 17 and compressed in the thickness direction.
- the probe card 1 since the probe card 1 is provided with the sheet-like probe 10 shown in Fig. 1, stable electrical connection can be made to the wafer 6 on which the electrodes 7 to be inspected are formed at a small pitch. The state can be reliably achieved, and the thickness of the insulating layer 18B, which prevents the electrode structure 15 in the sheet-like probe 10 from falling off, is large, so that high durability can be obtained.
- the inspection apparatus since it is provided with the probe card 1 having the sheet-like probe 10 shown in Fig. 1, the inspection apparatus can be applied to the wafer 6 on which the electrodes 7 to be inspected are formed at a small pitch. In addition, the stable electrical connection state can be reliably achieved, and since the probe card 1 has high durability, even when a large number of wafers 6 are inspected, the reliability is high over a long period of time. , Inspection can be performed.
- circuit device inspection device of the present invention is not limited to the above-described example, and various changes can be made as follows.
- the probe card 1 shown in FIG. 16 achieves collective electrical connection to the test electrodes 7 of all the integrated circuits formed on the wafer 6, but the probe card 1 is formed on the wafer 6.
- the electrodes may be electrically connected to the electrodes 7 to be inspected of a plurality of integrated circuits selected from all the integrated circuits.
- the number of integrated circuits to be selected is appropriately selected in consideration of the size of the wafer 6, the number of integrated circuits formed on the wafer 6, the number of electrodes 7 to be inspected in each integrated circuit, and, for example, 16 , 32, 64, 128.
- the probe card 1 is electrically connected to the electrodes 7 to be inspected of a plurality of integrated circuits selected from all the integrated circuits formed on the wafer 6.
- the process of electrically connecting the probe card 1 to the electrodes 7 to be inspected of a plurality of integrated circuits selected from other integrated circuits and then performing the inspection is repeated. As a result, all the integrated circuits formed on the wafer 6 can be inspected electrically.
- the anisotropic conductive sheet 35 of the anisotropic conductive connector 30 is electrically connected to the electrode 7 to be inspected in addition to the conductive portion 36 formed according to the pattern corresponding to the pattern of the electrode 7 to be inspected. No connection may be provided.
- the non-connection conductive portion 36 may be formed.
- the circuit device to be inspected by the inspection device of the present invention is not limited to the wafer 6 on which a large number of integrated circuits are formed, but includes semiconductor chips, package LSIs such as BGA and CSP, and CMCs. It can be configured as a device for inspecting a circuit formed in a semiconductor integrated circuit device or the like.
- the sheet-shaped probe 10 is fixed to the anisotropic conductive sheet 35 and the circuit board 20 for inspection by, for example, the guide pins 50 while being held by the holding member such as a cylindrical ceramic. You can also.
- the second rear-surface-side metal layer 17A is indispensable and is omitted, and the metal is filled in the short-circuit portion forming recess 18K and the pattern hole 17H.
- the back electrode portion 17 integrally formed with the short-circuit portion 18 may be formed.
- the support 25 may be integrated with the separately prepared support 25 and the manufactured sheet probe 10 by using an adhesive or the like.
- the contact probe 9 may cover the plurality of openings 26 of the support 25 as shown in FIG. 5B. It may be the one that is placed in.
- the sheet-like probe 10 By configuring the sheet-like probe 10 with a plurality of independent contact films 9 in this manner, for example, when a sheet-like probe 10 for inspecting a wafer having a diameter of 8 inches or more is formed, the contact film 9 due to a temperature change can be formed. This is preferable because the expansion and contraction is reduced and the displacement force S of the electrode structure 15 is reduced.
- Such a sheet probe is formed by patterning the insulating layer 18B with a resist on the insulating layer 18B and etching the insulating layer 18B into an arbitrary shape in the state of Fig. 15 (c)) in the method of manufacturing the sheet probe 10 of the present invention. It is obtained by dividing into contact films 9.
- a diameter of 8 inch silicon (coefficient of linear thermal expansion 3. 3 X 10- 6 ZK) made of Ueno, on 6, dimensions respectively 6. 85 mm X 6. 85 mm square integrated circuits 483 L were formed in total.
- a photosensitive polyimide is spin-coated on the surface of the wafer 6 on the side where the integrated circuit L is formed to form a resin film and pre-beta is performed.
- the resin film formed of the photosensitive polyimide is not exposed (not exposed).
- Each of the integrated circuits L formed on the wafer 6 has, as shown in FIG. 21, two rows of electrode regions A to be inspected at the center thereof at intervals of 2500 m.
- Figure 22 (a) As shown in the figure, each rectangle has a vertical dimension (vertical direction in Fig. 22 (a)) of 90 m and a horizontal dimension (! / In Fig. 22 (a), right and left) of 90 ⁇ m.
- the 26 electrodes to be inspected are arranged in a row in a horizontal direction at a pitch of 120 m.
- the electrode 7 to be inspected is covered with an insulating film B2 having a thickness of about 10 m around the surface! / Puru.
- the total number of the electrodes 7 to be inspected in this ueno 6 is 26,116, and all the electrodes 7 to be inspected are electrically insulated from each other.
- test wafer Wl this wafer 6 is referred to as “test wafer Wl”.
- test wafer W2 this wafer is referred to as “test wafer W2”.
- a laminated polyimide sheet was prepared by laminating a metal layer made of copper having a diameter of 20 cm and a thickness of 4 m on one side of a polyimide sheet having a diameter of 20 cm and a thickness of 25 ⁇ m.
- a resist layer 22 was formed on the surface of the metal layer of the laminated polyimide sheet using a dry film resist having a thickness of 25 ⁇ m (see Fig. 8 (a)).
- the polyimide sheet corresponds to the protective film 40A
- the metal layer made of copper corresponds to the surface electrode forming metal sheet 16A.
- the laminated polyimide sheet is immersed in a plating bath containing nickel sulfamate, and an electrolytic plating process is performed using the metal sheet 16A for forming a surface electrode as a common electrode to fill each opening 23 with metal.
- a tip 16B of the surface electrode portion of a truncated cone having a diameter of 40 m and a thickness of 25 ⁇ m was formed (see Fig. 8 (c)).
- the front end portion 16B is positioned inside the opening on the side of the front electrode forming metal sheet 16A on which the front end portion 16B is formed, with the front end portion 16B of the front electrode portion standing upright at a predetermined position. Then, a spacer 39 formed at a position corresponding to the electrode area A to be inspected of an integrated circuit L having a thickness of 40 ⁇ m and an opening of 3400 mx 800 m was formed on the wafer 6 (see FIG. 9 (b)).
- a polyimide varnish is repeatedly applied and cured by screen printing in the opening of the spacer 39 laminated on the laminated polyimide sheet, so that a 40 / zm thick polyimide is coated so as to cover the tip 16B.
- a resin layer 55 made of was formed (see FIG. 9 (c)).
- the resist film 28A was removed by immersing the laminated polyimide sheet in a sodium hydroxide solution at 45 ° C. for 2 minutes (see FIG. 10 (c)).
- the laminated polyimide sheet is immersed in a plating bath containing nickel sulfamate, and is subjected to electrolytic plating using the metal sheet for surface electrode formation 16A as an electrode to fill the opening 52 of the resin layer 55 with metal.
- the base end 16C of the surface electrode was formed.
- a polyimide sheet having a liquid polyimide layer having a thickness of 12 ⁇ m on both sides of a polyimide sheet having a diameter of 20.4 cm and a thickness of 12.5 ⁇ m was attached to the surface electrode portion 16 and the surface of the laminate 10A. It was laminated on the surface of spacer 39.
- a layer having a diameter of 22 cm and a thickness of 10 ⁇ m was formed on the surface of the liquid polyimide layer of the laminate 10A.
- a metal sheet made of 42 alloy was laminated.
- a protective tape made of polyethylene terephthalate having an inner diameter of 20.4 cm and an outer diameter of 22 cm is arranged on the surface of the metal sheet on the side in contact with the liquid polyimide layer, and subjected to thermocompression bonding in this state.
- the laminated body 10B shown in FIG. 11B was produced.
- the laminate 10B is formed by laminating an insulating layer 18B made of polyimide with a thickness of 36 ⁇ m on one surface of the laminate 10A on which the surface electrode portion 16 is formed, and a back surface made of 42 alloy on the surface of the insulating layer 18B. It has a side metal layer 17A (see FIG. 11 (b)).
- 26116 circular patterns having a diameter of 60 m according to the pattern corresponding to the pattern of the electrode to be inspected formed on the test wafer W1 were formed on the entire surface of the back surface side metal layer 17A with respect to the laminate 10B.
- a resist film 28A having holes 28H was formed (see FIG. 11 (c)).
- the exposure treatment is performed by irradiating 80 mJ of ultraviolet light with a high-pressure mercury lamp
- the development treatment is performed by immersing the resist film in a developer composed of a 1% aqueous sodium hydroxide solution for 40 seconds. This was done by repeating the procedure several times.
- the backside metal layer 17A is subjected to an etching treatment using a ferric chloride-based etchant at 50 ° C. for 30 seconds, so that the resist film is formed on the backside metal layer 17A.
- 26116 pattern holes 17H communicating with the pattern holes 28H of the 28A were formed (see FIG. 12 (a)).
- the insulating layer 18B was etched by using an amine-based polyimide etchant ("TPE-3000" manufactured by Toray Engineering Co., Ltd.) at 80 ° C for 15 minutes. 26116 through holes 18H communicating with the pattern holes 17H of the backside metal layer 17A were formed in the layer 18B, and the protective film 40A made of a polyimide sheet was removed (see FIG. 12 (b)).
- TPE-3000 amine-based polyimide etchant
- Each of the through holes 18H has a tapered shape whose diameter becomes smaller in accordance with the directional force on the surface of the insulating layer 18B, the back surface electrode portion 17 is exposed at the bottom surface, and the opening diameter on the back surface side is reduced.
- the opening diameter on the 60 ⁇ m surface side was 25 ⁇ m.
- the laminate 10B in which the through holes 18H were formed was placed in a sodium hydroxide solution at 45 ° C.
- the resist film 28A was removed from the laminate 10B by immersion for 2 minutes.
- a resist film 29A is formed on the laminate 10B with a dry film resist having a thickness of 25 ⁇ m so as to cover the entire surface of the second backside metal layer 17A, and an insulating layer is formed on the resist film 29A.
- 26116 rectangular pattern holes 29H measuring 200 mx 60 m and communicating with the through holes 18H of the 18B were formed.
- the surface electrode forming metal sheet 16A was covered with a protective film 40C made of polyethylene terephthalate having a thickness of 25 ⁇ m (see Fig. 12 (c)).
- the exposure treatment is performed by irradiating 80 mJ of ultraviolet rays with a high-pressure mercury lamp
- the development treatment is an operation of immersing in a developer composed of a 1% sodium hydroxide aqueous solution for 40 seconds. Performed by repeating twice.
- the laminate 10B was immersed in a plating bath containing nickel sulfamate, and the laminate 10B was subjected to electrolytic plating using the metal sheet 16A for forming a surface electrode as an electrode to form each short-circuit portion.
- the metal sheet 16A By filling the metal into the forming recess 18K, the short-circuit portion 18 connected to the front electrode portion 16 and the back electrode portion connected to each other by the back metal layer 17A are connected.
- the laminate 10B was immersed in a sodium hydroxide solution at 45 ° C for 2 minutes.
- a resist film for etching having a pattern hole 29K is formed by patterning with a dry film resist having a thickness of 25 m so as to cover a portion serving as the support 25 in the backside metal layer 17A and the backside electrode portion 17. 29B was formed (see FIG. 13 (b)).
- the exposure treatment was performed by irradiating 80 mi of ultraviolet light with a high-pressure mercury lamp, and the development treatment was immersed in a developer consisting of a 1% aqueous sodium hydroxide solution for 40 seconds. The operation was repeated twice.
- the protective film 40C was also removed with the laminate 10B, and then the surface-electrode-forming metal sheet 16A and the back-side metal layer 17A were removed using an ammonia-based etching solution. By performing the etching treatment at 0 ° C. for 30 seconds, the entire surface electrode forming metal sheet 16A was removed.
- a support 25 having a plurality of openings 26 formed according to a pattern corresponding to the pattern of the electrode region was formed (see FIG. 13C).
- Each of the openings 26 provided in the support 25 is 3600 m in the horizontal direction and 1000 m in the vertical direction.
- the resist film 29B was removed from the back surface of the support 25 and the back surface electrode portion 17 by immersing the laminate 10B in an aqueous sodium hydroxide solution at 45 ° C. for 2 minutes.
- a resist film 17E is formed using a dry film resist having a thickness of 25 ⁇ m so as to cover the back surface of the support 25, the back surface of the insulating layer 18B, and the back electrode portion 17, and the resist film 17E is formed to have a thickness. It was covered with a protective film 40 mm made of 25 ⁇ m polyethylene terephthalate (see Fig. 14 (a)).
- the laminate 10B was subjected to an etching treatment at 80 ° C. for 10 minutes using an amine-based polyimide etching solution (“TPE-3000” manufactured by Toray Engineering Co., Ltd.), thereby obtaining The laminate 10C from which the fat layer 55 was removed was obtained (see FIG. 14 (b)).
- TPE-3000 an amine-based polyimide etching solution
- a resist film was formed using a 25 m-thick dry film resist so as to cover the surface electrode portion 16 and the insulating layer 18B of the laminate 10C, and was patterned so as to cover a portion to be the contact film 9.
- a resist film 17F was formed (see FIG. 15A).
- Each of the resist films 17F is 4600 ⁇ m in the horizontal direction and 2000 ⁇ m in the vertical direction.
- an amine-based polyimide etchant (“T 3000-3000” manufactured by Toray Engineering Co., Ltd.) is used for etching at 80 ° C. for 10 minutes to allow each metal frame plate to pass through.
- a laminate 10C provided with the contact film 9 having the electrode structure 15 formed in the hole was obtained (see FIG. 15 (b)).
- the laminate 10C also removed the protective film 40B, and then immersed in an aqueous sodium hydroxide solution at 45 ° C for 2 minutes to remove the resist film 17E and the resist film 17F. (See FIG. 15 (c)).
- the protective tape made of polyethylene terephthalate was removed from the peripheral portion of the support 25, and an adhesive (Cemedyne Co., Ltd .: two-component acrylic adhesive Y-620) was applied to the surface of the peripheral portion of the support 25. )
- an adhesive Cosmeticyne Co., Ltd .: two-component acrylic adhesive Y-620
- the support plate 2 and the support 25 are Was pressed at a load of 50 kg and held at 25 ° C. for 8 hours to join the support plate 2 to the support 25, thereby producing a sheet-like probe 10 according to the present invention.
- H-K350 manufactured by Hitachi Chemical Co., Ltd. was used for the parts not particularly described as dry film resists.
- the thickness d of the insulating layer 18B is 36 m
- the diameter R2 at the tip of the tip 16B of the surface electrode portion 16 of the electrode structure 15 is 36 ⁇ m
- the diameter R1 at the base is 40 ⁇ m.
- diameter R6 of base end of base end 16C of surface electrode part is 55 ⁇ m.
- the protruding height HI of the tip portion 16B of the surface electrode portion 16 is 25 ⁇ m.
- the protruding height H2 of the base end 16C of the surface electrode part 16 is 15 ⁇ m.
- the protruding height h (Hl + H2) of the surface electrode part 16 is 40 ⁇ m.
- the ratio (R2ZR1) of the diameter R2 at the distal end to the diameter R1 at the proximal end of the surface electrode portion 16 is 0.9.
- the ratio of the protrusion height h to the base end diameter R6 of the base end 16C of the surface electrode part 16C hZR6 is 0.73
- the inclination angle b of the side surface of the tip portion 16B of the surface electrode portion 16 is 85 °, and the inclination angle c of the side surface of the base portion 16C of the surface electrode portion 16 is 45 °.
- the shape of the short-circuit portion 18 is a truncated cone, the diameter R3 of one end on the front side is 25 / ⁇ , the diameter R4 of the other end on the back side is 60 111, and the shape of the back electrode section 17 is a rectangular flat plate. It has a width (diameter R5) of 60 ⁇ m, a power of S200 ⁇ m, and a d2 force of 20 ⁇ m.
- a laminate 90C having a front-side metal layer 92A, a second back-side metal layer 92B, and a first back-side metal layer 92C and comprising an insulating sheet 11 and an insulating layer 18B is provided.
- the front side metal layer 92A is made of 4 m thick copper
- the insulating layer 18B is made of 12.5 / zm thick polyimide
- the first back side metal layer 92C is thick.
- the insulating sheet 11 is made of polyimide having a thickness of 37.5 / zm
- the second backside metal layer 92B is made of 42 alloy having a thickness of 10 ⁇ m. .
- a pattern hole having a diameter of 90 m was formed on the second backside metal layer side 92B with respect to the laminate 90C, and the insulating layer 18B was successively formed.
- a recess 90K was created for forming the structure (see Fig. 32 (b)).
- the laminate 90C was immersed in a plating bath containing nickel sulfamate, and the laminate 90C was subjected to electrolytic plating using the surface-side metal layer 92A as an electrode to form an electrode structure.
- the metal was filled in the recess 90K (see Fig. 32 (c)).
- the first backside metal layer is etched to form a holding portion
- the second backside metal layer is etched, and a part thereof is removed to form a back electrode portion and a support portion 92E.
- the insulating layer 18B was etched to divide the insulating layer into respective contact films (see FIG. 32 (e)).
- a cyanoacrylate-based adhesive manufactured by Toagosei Co., Ltd .: product name
- a cyanoacrylate-based adhesive manufactured by Toagosei Co., Ltd .: product name
- a cyanoacrylate-based adhesive manufactured by Toagosei Co., Ltd .: product name
- Alon Alpha Part No .: # 200 Alon Alpha Part No .: # 200
- a laminated body with a contact film formed thereon is laminated and held at 25 ° C for 30 minutes to cure the adhesive layer and form a sheet probe.
- the thickness d of the insulating layer was 37.5 m
- the shape of the surface electrode portion of the electrode structure was a truncated cone
- the base end diameter was 37 111
- the tip end was The diameter is 13 / zm (average value)
- the protruding height is 12.5 / zm
- the holding part is 60 ⁇ m in width, 200 ⁇ m in height, 4 m in thickness
- the shape of the short-circuit part is conical It is a trapezoidal shape
- the diameter of one end on the front side is 37 m
- the diameter of the other end on the back side is 90 m
- the shape of the back electrode part is a rectangular flat plate
- the horizontal width is 90 ⁇ m
- the vertical width is 200 ⁇ m and a thickness of 20 ⁇ m.
- sheet probe 01 sheet probe 01
- sheet probe 04 sheet probe 04
- FC1000 commercially available nickel particles manufactured by Westaim
- magnetic core particles were prepared as follows.
- Nisshin Engineering air classifier Co., Ltd. "Turbo Classifier TC- 15N"
- the nickel particles 2kg, a specific gravity of 8.9, the air volume is 2. 5m 3 Zmin, rotor speed is 2250rpm
- the classification points Classification was performed under the conditions of 15 ⁇ m and a supply speed of nickel particles of 60 gZmin, 0.8 kg of nickel particles having a particle diameter of 15 / zm or less were collected, and 0.8 kg of the nickel particles was further crushed to a specific gravity of 0.8 kg.
- the air volume is 2. 5 m 3 Zmin, rotor speed 2930Rp m, classification point is 10 / ⁇ ⁇ , feed rate of the nickel particles classified under conditions of 30GZmin, were collected nickel particles 0. 5 kg .
- the obtained nickel particles had a number average particle size of 7.4 m, a variation coefficient of the particle size of 27%, a BET specific surface area of 0.46 X 10 3 m 2 Zkg, and a saturation magnetization of 0.6 Wb / It was m 2.
- the nickel particles are referred to as magnetic core particles Q.
- the magnetic core particles Q100g were charged into the processing tank of the powder coating apparatus, and 2 L of a 0.32N aqueous hydrochloric acid solution was added thereto and stirred to obtain a slurry containing the magnetic core particles Q.
- the slurry was stirred at room temperature for 30 minutes to perform an acid treatment on the magnetic core particles Q, and then allowed to stand for 1 minute to precipitate the magnetic core particles Q, and the supernatant was removed.
- the slurry was allowed to stand while being cooled while allowing the particles to precipitate, and the supernatant was removed to prepare conductive particles P.
- the conductive particles were dried by a dryer set at 90 ° C.
- the obtained conductive particles have a number average particle size of 7.3 m, a BET specific surface area of 0.38 ⁇ 10 3 mVkg, (mass of gold forming the coating layer) Z (mass of magnetic core particles [A]). ) was 0.3 o
- conductive particles are referred to as "conductive particles (a)".
- a frame plate 31 having a diameter of 8 inches and having 966 openings 32 formed corresponding to each electrode region to be inspected in the test wafer W1 is formed. Produced.
- this frame plate 31 In the material of this frame plate 31 is covar (coefficient of linear thermal expansion 5 X 10- 6 ZK), the thickness of Ru te in 60 mu m.
- Each of the openings 32 has a horizontal dimension (! / In FIG. 23 and FIG. 24, left / right direction) of 3600 ⁇ m and a vertical dimension (vertical direction in FIGS. 23 and 24) of 900 ⁇ m. It is.
- two openings 32 of the frame plate 31 are formed for one of the integrated circuits L formed on the test wafer and provided for the same integrated circuit L.
- the openings 32 of the frame plate 31 are arranged at a center-to-center distance (vertical direction in FIG. 24) at a pitch of 2000 ⁇ m.
- a circular air inflow hole 33 is formed at a central position between the vertically adjacent openings 32, and has a diameter of 1000 ⁇ m.
- the additional liquid silicone rubber used was a two-part type liquid A and liquid B each having a viscosity of 250 Pa's, and the cured product had a compression set of 5%, Durometer A hardness is 32 and tear strength is 25kNZm.
- the mixture was poured into a mold, and the mixture was subjected to defoaming treatment under reduced pressure, and then subjected to a curing treatment at 120 ° C for 30 minutes to obtain a 12.7 mm thick, 29 mm diameter.
- a cylindrical body made of a cured silicone rubber was prepared. C, post-curing was performed for 4 hours.
- the compression set at 150 ° C. and 2 ° C. was measured in accordance with JIS K 6249.
- a sheet having a thickness of 2.5 mm was produced by subjecting the addition-type liquid silicone rubber to curing treatment and post-curing under the same conditions as in (ii) above.
- a turret-shaped test piece was prepared by punching from this sheet, and the bow I crack strength at 23 ° C and 2 ° C was measured in accordance with JIS K 6249.
- Durometer A hardness is 23 ⁇ 2 ° C according to JIS K 6249, by stacking five sheets prepared in the same manner as in (iii) above and using the obtained stack as a test piece. The value at the time was measured.
- the curing treatment of the molding material layer was performed at 100 ° C for 1 hour while applying a magnetic field of 2T in the thickness direction by an electromagnet.
- Each of the anisotropic conductive sheets 35 has a width of 6000 ⁇ m, a length of 2000 ⁇ m, and 26 conductive sheets.
- the sections 36 are arranged in a row in the horizontal direction at a pitch of 120 m.Each of the conductive sections 36 has a horizontal dimension of 60 ⁇ m, a vertical dimension of 200 ⁇ m, a thickness of 150 ⁇ m, and a protrusion.
- the protrusion height of the part 38 is 25 ⁇ m, and the thickness of the insulating part 37 is 100 ⁇ m.
- a non-connection conductive portion 36 is arranged between the outermost conductive portion 36 in the lateral direction and the opening edge of the frame plate 31.
- Each of the non-connection conductive portions 36 has a horizontal dimension of 60 m, a vertical dimension of 200 m, and a thickness of 150 m.
- anisotropically conductive connector Cl anisotropically conductive connector 1 C8.
- a circuit board for inspection on which an inspection electrode 21 is formed in accordance with a pattern corresponding to the pattern of the electrode to be inspected in W1 using alumina ceramics (linear thermal expansion coefficient: 4.8 ⁇ 10—so K) as a substrate material. was prepared.
- the inspection circuit board 20 is a rectangle having an overall size of 30 cm x 30 cm, and the inspection electrode has a lateral dimension force of 0 ⁇ m and a vertical dimension of 200 ⁇ m.
- the obtained inspection circuit board is referred to as “inspection circuit board T1”. ⁇ Evaluation of sheet probe>
- Test 1 insulation between adjacent electrode structures
- test wafer W1 was placed on a test table, and a sheet probe was placed on the surface of the test wafer W1 so that each of the surface electrode portions 16 of the test wafer W1
- the anisotropic conductive connector 30 is placed on the sheet-like probe so that each of the conductive portions 36 is positioned on the back electrode 17 of the sheet-like probe.
- the test circuit board T1 is positioned and positioned on the anisotropic conductive connector 30 such that each of the test electrodes 21 is positioned on the conductive portion 36 of the anisotropic conductive connector 30.
- the test circuit board T1 was further pressed downward with a load of 200 kg (the load applied to one electrode structure was about 8 g on average).
- a voltage is sequentially applied to each of the 26116 test electrodes 21 on the test circuit board T1, and the electrical resistance between the test electrode to which the voltage is applied and the other test electrodes is determined by the electrode structure of the sheet probe.
- the measurement was made as an electrical resistance (hereinafter, referred to as “insulation resistance”) between 15 points, and the ratio of the measurement points having an insulation resistance of 10 ⁇ or less at all the measurement points (hereinafter, referred to as “insulation failure ratio”) was obtained.
- the insulation resistance is less than or equal to 10 ⁇ , it is practically difficult to use the integrated circuit formed on the wafer for electrical inspection.
- connection stability of the electrode structure 15 to the electrode to be inspected was evaluated.
- the test wafer W2 was placed on a test table equipped with an electric heater, and a sheet probe was placed on the surface of the test wafer W2. Each of them is positioned so as to be positioned on the electrode 7 to be inspected on the test wafer W2, and the anisotropic conductive connector 30 is placed on the sheet-shaped probe, and each of the conductive portions 36 is connected to the back of the sheet-shaped probe.
- the circuit board T1 for inspection is placed on the anisotropic conductive connector 30 so that each of the test electrodes 21 is placed on the conductive part 36 of the anisotropic conductive connector 30.
- the test circuit board T1 was further pressed downward with a load of 200 kg (the load applied to one electrode structure was about 8 g on average).
- the two test electrodes 21 electrically connected to each other via the sheet probe, the anisotropic conductive connector 30, and the test wafer W2. was measured sequentially.
- connection failure ratio the ratio of measurement points having a conduction resistance of 1 ⁇ or more at all measurement points
- operation (1) This operation is referred to as “operation (1)”.
- test table was cooled to room temperature (25 ° C), and the pressure applied to the test circuit board T1 was released. This operation is referred to as “operation (3)”.
- the sheet-shaped probe O according to the comparative example has a small protruding height force S of the surface electrode portion. It became clear that the electrical connection could not be stably continued.
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Abstract
Description
Claims
Applications Claiming Priority (2)
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JP2004132151 | 2004-04-27 | ||
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PCT/JP2005/007938 WO2005103733A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007936 WO2005103731A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007939 WO2005103734A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007935 WO2005103730A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007937 WO2005103732A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
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PCT/JP2005/007936 WO2005103731A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007939 WO2005103734A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007935 WO2005103730A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
PCT/JP2005/007937 WO2005103732A1 (ja) | 2004-04-27 | 2005-04-26 | シート状プローブおよびその製造方法並びにその応用 |
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US (2) | US7671609B2 (ja) |
EP (2) | EP1744166A1 (ja) |
KR (3) | KR20070010187A (ja) |
CN (2) | CN1957259A (ja) |
TW (5) | TW200602642A (ja) |
WO (5) | WO2005103733A1 (ja) |
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- 2005-04-26 WO PCT/JP2005/007939 patent/WO2005103734A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
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CN1957259A (zh) | 2007-05-02 |
TW200540430A (en) | 2005-12-16 |
EP1744166A1 (en) | 2007-01-17 |
TW200538742A (en) | 2005-12-01 |
EP1744167A1 (en) | 2007-01-17 |
TW200604533A (en) | 2006-02-01 |
WO2005103730A1 (ja) | 2005-11-03 |
US20070200574A1 (en) | 2007-08-30 |
TW200602642A (en) | 2006-01-16 |
CN1973207A (zh) | 2007-05-30 |
KR20070006926A (ko) | 2007-01-11 |
EP1744167A4 (en) | 2012-02-29 |
KR20070010068A (ko) | 2007-01-19 |
TWI357499B (ja) | 2012-02-01 |
EP1744167B1 (en) | 2013-10-02 |
TWI361894B (ja) | 2012-04-11 |
US20070205783A1 (en) | 2007-09-06 |
KR101140505B1 (ko) | 2012-04-30 |
US7737707B2 (en) | 2010-06-15 |
WO2005103731A1 (ja) | 2005-11-03 |
US7671609B2 (en) | 2010-03-02 |
WO2005103732A1 (ja) | 2005-11-03 |
WO2005103734A1 (ja) | 2005-11-03 |
TW200602645A (en) | 2006-01-16 |
KR20070010187A (ko) | 2007-01-22 |
CN100451659C (zh) | 2009-01-14 |
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