WO2006046650A1 - ウエハ検査用探針部材、ウエハ検査用プローブカードおよびウエハ検査装置 - Google Patents
ウエハ検査用探針部材、ウエハ検査用プローブカードおよびウエハ検査装置 Download PDFInfo
- Publication number
- WO2006046650A1 WO2006046650A1 PCT/JP2005/019799 JP2005019799W WO2006046650A1 WO 2006046650 A1 WO2006046650 A1 WO 2006046650A1 JP 2005019799 W JP2005019799 W JP 2005019799W WO 2006046650 A1 WO2006046650 A1 WO 2006046650A1
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- Prior art keywords
- probe
- electrode
- wafer
- sheet
- frame plate
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/073—Multiple probes
- G01R1/07307—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card
- G01R1/0735—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card arranged on a flexible frame or film
-
- 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
Definitions
- Wafer inspection probe member Wafer inspection probe card, and wafer inspection apparatus
- the present invention relates to a wafer inspection probe member, a wafer inspection probe card, and a wafer inspection apparatus that are used to perform electrical inspection of a plurality of integrated circuits formed on a wafer in a wafer state.
- a large number of integrated circuits are formed on a wafer made of, for example, silicon, and then basic electrical characteristics of each of these integrated circuits are inspected. Thus, a probe test for selecting defective integrated circuits is performed. Next, a semiconductor chip is formed by dicing the wafer, and the semiconductor chip is housed in an appropriate package and sealed. Further, each packaged semiconductor integrated circuit device is subjected to a burn-in test for selecting a semiconductor integrated circuit device having a potential defect by inspecting electrical characteristics in a high temperature environment.
- a probe card having inspection electrodes arranged according to a pattern is used. Conventionally, such a probe card is used in which inspection electrodes (inspection probes) made of pins or blades are arranged.
- a wafer is divided into a plurality of areas in which, for example, 16 integrated circuits are formed, and this area is divided into the areas.
- a probe test is collectively performed on all the formed integrated circuits, and a method of sequentially performing a probe test on integrated circuits formed in other areas is adopted.
- the inspection efficiency has been improved and the inspection cost has been reduced. Therefore, it is required to perform a probe test on a larger number of integrated circuits at once.
- an inspection circuit board in which a plurality of inspection electrodes are formed according to a pattern corresponding to the pattern of the electrode to be inspected on one surface, and the inspection circuit board are arranged on one surface.
- An anisotropic conductive elastomer sheet in which a plurality of conductive portions extending in the thickness direction are formed according to a pattern corresponding to the pattern of the electrode to be inspected, and the anisotropic conductive elastomer sheet is disposed on the anisotropic conductive elastomer sheet.
- a probe card including a sheet-like probe has been proposed (for example, Patent Document 1).
- a sheet-like probe in this probe card is composed of an insulating sheet and a plurality of electrodes arranged on the insulating sheet according to a pattern corresponding to the pattern of the electrode to be inspected and extending in the thickness direction of the insulating sheet.
- the structure includes a structure and a ring-shaped holding member made of, for example, ceramics provided at the peripheral edge of the insulating sheet.
- the Ueno to be inspected is a large one having a diameter of, for example, 8 inches or more and the number of electrodes to be inspected is, for example, 5000 or more, particularly 10,000 or more. Since the pitch of the electrodes to be inspected in each integrated circuit is extremely small, the anisotropic conductive elastomer sheet in the probe card has the following problems.
- the linear thermal expansion coefficient of the material for example silicon constituting the wafer 3. is about 3 X 10- 6 ZK, whereas linear thermal expansion coefficient of the material such as silicone rubber constituting the anisotropically conductive elastomer one sheet 2. is about 2 X 10- 4 ⁇ .
- the linear thermal expansion coefficient greatly differs between the material constituting the integrated circuit device to be inspected (for example, silicon) and the material constituting the anisotropic conductive elastomer sheet (for example, silicone rubber).
- the electrical connection state changes and stabilizes as a result of displacement between the conductive part of the anisotropic conductive elastomer sheet and the test electrode of the integrated circuit device. It is difficult to maintain a secure connection.
- the sheet-like probe in the above probe card has the following problems.
- the insulating sheet is fixed to the holding member in a state in which tension is applied to the insulating sheet. .
- the applicant of the present invention is a frame plate in which a plurality of openings are formed corresponding to an electrode region in which an inspection target electrode of an integrated circuit is formed on a wafer to be inspected.
- a sheet-like probe comprising a plurality of contact films in which an electrode structure is arranged on an insulating film, and a sheet-like probe arranged on and supported by one surface of the frame plate, and the sheet-like probe and the above-mentioned Proposed a probe card with an anisotropic conductive connector (see Japanese Patent Application No. 2004-305956).
- the conductive portion of the anisotropic conductive connector in the probe card is connected to the back electrode portion of the sheet-like probe. Therefore, it is important to press the sheet in the thickness direction and compress it sufficiently.
- a frame plate 81 in the sheet-like probe 80 exists between the contact film 85 in the sheet-like probe 80 and the elastic anisotropic conductive film 95 in the anisotropically conductive connector 90.
- the frame plate 81 of the sheet-like probe 80 comes into contact with the elastic anisotropic conductive film 95 of the anisotropically conductive connector 90, so that the electrode structure
- the conductive portion 96 of the elastic anisotropic conductive film 95 cannot be reliably compressed in the thickness direction by the back electrode portion 87 of the 86, and as a result, it is difficult to reliably achieve a good electrical connection state.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-15565
- Patent Document 2 Japanese Patent Laid-Open No. 2002-184821 Disclosure of the invention
- the present invention has been made based on the circumstances as described above, and an object of the present invention is to have Ueno, which is an inspection object, having a large area with a diameter of 8 inches or more and an extremely large pitch of electrodes to be inspected. Even if it is small, it is possible to reliably achieve a good electrical connection state with respect to the wafer, and it is possible to reliably prevent displacement of the electrode to be inspected due to a temperature change, and to achieve good electrical connection to the wafer. It is an object to provide a probe member for wafer inspection, a probe card for wafer inspection, and a wafer inspection apparatus in which the general connection state is stably maintained.
- the probe member for wafer inspection has a plurality of openings corresponding to electrode regions in which electrodes to be inspected are arranged in all or some integrated circuits formed on a wafer to be inspected. And a plurality of contact films arranged and supported on the surface of the frame board so as to close the openings, each of the contact films being made of a flexible resin.
- a plurality of electrode structures formed by connecting a surface electrode portion exposed on the surface of the insulating film and a back electrode portion exposed on the back surface to the insulating film formed in the thickness direction of the insulating film.
- a sheet-like probe arranged according to a pattern corresponding to the electrode;
- a frame plate having a plurality of openings formed corresponding to the electrode regions, and a plurality of elastic anisotropic conductive films arranged and supported on the frame plate so as to block one opening, An anisotropic conductive connector disposed on the back surface of the probe, and
- Each of the openings of the frame plate in the sheet-like probe has a size capable of receiving the outer shape in the surface direction of the elastic anisotropic conductive film of the anisotropic conductive connector.
- the elastic anisotropic conductive film contains conductive particles exhibiting magnetism in an elastic polymer material, which is arranged according to a pattern corresponding to the electrode to be inspected. It is preferable to have a conductive portion for connection and an insulating portion made of an elastic polymer material that insulates them from each other.
- the level of the surface of the frame plate in the anisotropic conductive connector and the level of the end surface on the surface side of the conductive portion for connection of the elastic anisotropic conductive film It is preferable that the ratio hZd is 1.2 or more, where h is the gap and d is the gap between the level of the back surface of the frame plate and the level of the electrode surface of the back electrode portion in the sheet-like probe.
- the thickness of the frame plate in the sheet probe is preferably 10 to 200 ⁇ m.
- frame plate in the frame plate and the anisotropic conductive connector in the sheet-like probe, respectively linear thermal expansion coefficient is formed by a 3 X 10- 5 ⁇ following materials Rukoto is preferably! /,.
- the probe card for wafer inspection of the present invention is for inspection in which inspection electrodes are formed on the surface according to a pattern corresponding to the electrodes to be inspected in all or some of the integrated circuits formed on the wafer to be inspected. It is characterized by comprising a circuit board and the above-described wafer inspection probe member disposed on the surface of the inspection circuit board.
- a wafer inspection apparatus of the present invention is a wafer inspection apparatus that performs electrical inspection of a plurality of integrated circuits formed on a wafer in the state of a wafer. It is characterized by comprising a probe card.
- each force of the opening of the frame plate in the sheet-like probe has a size capable of receiving the outer shape in the plane direction of the elastic anisotropic conductive film of the anisotropic conductive connector. Therefore, when the electrode structure of the sheet-like probe is pressurized, it is avoided that the frame plate of the sheet-like probe comes into contact with the anisotropic anisotropic conductive film of the anisotropically conductive connector.
- the elastic anisotropic conductive film can be reliably compressed in the thickness direction, and as a result, a favorable electrical connection state to the wafer can be reliably achieved.
- the sheet-like probe is supported by the contact film having the electrode structure disposed and supported in each of the plurality of openings formed in the frame plate.
- Each contact film has a small area, and a contact film with a small area has a small absolute amount of thermal expansion in the surface direction of the insulating film. Therefore, the wafer to be inspected has a diameter of 8 inches or more. Even if the electrodes have a large area and the pitch of the electrodes to be inspected is extremely small / small, misalignment due to temperature changes can be reliably prevented.
- the conductive connector 1 has an elastic anisotropic conductive film disposed and supported in each of a plurality of openings formed in the frame plate, so that each of the elastic anisotropic conductive films has a small area.
- An elastic anisotropic conductive film with a small thickness has a small absolute amount of thermal expansion in the surface direction, so the wafer force diameter to be inspected is a large area of 8 inches or more and the pitch of the electrodes to be inspected is extremely small. Even so, it is possible to reliably prevent misalignment due to temperature changes. Therefore, in the wafer inspection, it is possible to stably maintain a good electrical connection state to the wafer.
- the wafer inspection probe card according to the present invention comprises the above-described wafer inspection probe member, so that the inspection target has a large area with a wafer force diameter of 8 inches or more. Even if the electrode pitch is extremely small, it is possible to reliably achieve a good electrical connection state, and it is also possible to reliably prevent misalignment with respect to the electrode to be inspected due to temperature changes. As a result, it is possible to stably maintain a good electrical connection state.
- Such a wafer inspection probe card is extremely suitable as a probe card used in a wafer inspection apparatus for performing electrical inspection of a wafer having a large area of 8 inches or more in diameter.
- FIG. 1 is an explanatory cross-sectional view showing a first example of a probe member according to the present invention.
- FIG. 2 is an explanatory sectional view showing an enlarged main part of the probe member of the first example.
- FIG. 3 is a plan view of a sheet-like probe in the probe member of the first example.
- FIG. 4 is an enlarged plan view showing a contact film of a sheet-like probe in the probe member of the first example.
- FIG. 5 is an explanatory cross-sectional view showing an enlarged configuration of a contact film of a sheet-like probe in the probe member of the first example.
- FIG. 6 is a plan view showing a frame plate of a sheet-like probe in the probe member of the first example.
- FIG. 7 is an explanatory cross-sectional view showing a configuration of a laminate used for manufacturing a sheet-like probe.
- FIG. 8 is an explanatory cross-sectional view showing a state in which a protective tape is arranged on the peripheral edge of the frame plate.
- FIG. 9 is an explanatory cross-sectional view showing a state in which an adhesive layer is formed on the metal foil for the back electrode part in the laminate shown in FIG.
- FIG. 10 is an explanatory cross-sectional view showing a state in which a frame plate is bonded to a metal foil for a back electrode part in a laminate.
- FIG. 11 is an explanatory cross-sectional view showing a state in which a through hole is formed in the insulating film resin sheet in the laminate.
- FIG. 12 is a cross-sectional view for explaining a state where a short-circuit portion and a surface electrode portion are formed on a resin sheet for insulating film.
- FIG. 13 is an explanatory cross-sectional view showing a state where a part of the adhesive layer is removed and the metal foil for the back electrode portion is exposed.
- FIG. 15 is an explanatory cross-sectional view showing a state where an insulating film is formed.
- FIG. 16 is a plan view showing an anisotropic conductive connector in the probe member of the first example.
- FIG. 17 A plan view showing a second example of the probe member according to the present invention.
- FIG. 18 is a cross-sectional view illustrating the configuration of the probe member of the second example.
- FIG. 19 is a plan view showing a frame plate of a sheet-like probe in the probe member of the second example.
- FIG. 20 A plan view showing an anisotropic conductive connector in the probe member of the second example.
- FIG. 21 is a cross-sectional view illustrating the configuration of the first example of the probe card according to the present invention.
- FIG. 22 is an explanatory cross-sectional view showing an enlarged configuration of a main part of the probe card of the first example.
- FIG. 23 is a plan view showing a circuit board for inspection in the probe card of the first example.
- ⁇ 24] It is explanatory drawing which expands and shows the lead electrode part in the circuit board for a test
- FIG. 25 is a cross-sectional view illustrating the configuration of a second example of the probe card according to the present invention.
- FIG. 26 is an explanatory cross-sectional view showing an enlarged configuration of a main part of the probe card of the second example.
- FIG. 27 is a plan view showing an inspection circuit board in the probe card of the second example.
- FIG. 28 is a cross-sectional view illustrating the configuration of a first example of a wafer inspection apparatus according to the present invention.
- ⁇ 29] is an explanatory cross-sectional view showing an enlarged configuration of a main part of the wafer inspection apparatus of the first example.
- ⁇ 30] An explanatory cross-sectional view showing an enlarged connector of the wafer inspection apparatus of the first example. is there.
- FIG. 31 is a cross-sectional view illustrating the configuration of a second example of the wafer inspection apparatus according to the present invention.
- FIG. 32 is an explanatory cross-sectional view showing an enlarged configuration of a main part of the wafer inspection apparatus of the second example.
- ⁇ 33 Shows a configuration of another example of the sheet-like probe in the probe member according to the present invention. It is sectional drawing for description.
- FIG. 34 is an explanatory cross-sectional view showing a configuration of a laminate used for manufacturing the sheet-like probe shown in FIG. 33.
- ⁇ 35 A sectional view for explanation showing a state in which an opening is formed in the metal foil for forming the holding portion of the laminate.
- ⁇ 36 A sectional view for explanation showing a state in which a through hole is formed in the resin sheet for an insulating protective layer of a laminate.
- FIG. 37 is an explanatory cross-sectional view showing a state in which a holding portion is formed on the back surface of the insulating protective layer resin sheet of the laminate.
- FIG. 38 is an explanatory cross-sectional view showing a state in which the resin film for insulating film and the metal foil for forming the back surface electrode are laminated on the back surface of the resin sheet for insulating protective layer of the laminate.
- FIG. 39 is an explanatory cross-sectional view showing a state in which an opening is formed in the metal foil for forming the back electrode portion.
- FIG. 40 A sectional view for explanation showing a state in which a through-hole is formed in the resin film for insulating film.
- FIG. 41 is an explanatory cross-sectional view showing a state in which an electrode structure is formed on a laminate.
- FIG. 42 is an explanatory cross-sectional view showing a state in which a metal film is formed on the back surface of the resin sheet for insulating film.
- FIG. 43 is an explanatory cross-sectional view showing a state where the frame plate is bonded onto the metal film via an adhesive layer.
- FIG. 44 is an explanatory cross-sectional view showing a state in which the metal foil for the plating electrode has been removed from the laminate.
- FIG. 45 is an explanatory cross-sectional view showing a state in which the surface electrode portion of the electrode structure is protruded from the surface of the insulating protective layer.
- FIG. 46 is an explanatory sectional view showing a state where an insulating film and an insulating protective layer are formed.
- FIG. 47 is an explanatory cross-sectional view showing a configuration of a modified example of the sheet-like probe shown in FIG. 33.
- FIG. 48 is an explanatory cross-sectional view showing a configuration of another modification of the sheet-like probe shown in FIG. 33.
- FIG. 49 is an explanatory cross-sectional view showing a configuration of still another modified example of the sheet-like probe shown in FIG. 33.
- FIG. 50 is an explanatory cross-sectional view showing a configuration of still another modified example of the sheet-like probe shown in FIG. 33.
- FIG. 51 is an explanatory cross-sectional view showing a configuration of still another modified example of the sheet-like probe shown in FIG. 33.
- FIG. 52 is an explanatory sectional view showing the positional relationship between a sheet-like probe and an anisotropic conductive connector in a conventional probe card.
- Metal foil for metal electrode Metal foil for holding part formation K opening
- Electrode structure Back electrode part Anisotropic conductive connector 95 Elastic anisotropic conductive film
- FIG. 1 is an explanatory view showing a configuration of a first example of a wafer inspection probe member (hereinafter simply referred to as a “probe member”) according to the present invention
- FIG. 2 shows a probe shown in FIG.
- FIG. 5 is an explanatory cross-sectional view showing an enlarged main part of a member.
- the probe member 1 of the first example is used for performing a burn-in test of each of the integrated circuits in a batch on the wafer, for example, on a wafer on which a plurality of integrated circuits are formed.
- the sheet-like probe 10 and an anisotropic conductive connector 40 disposed on the back surface of the sheet-like probe 10 are configured.
- FIG. 3 is a plan view showing the sheet-like probe 10 in the probe member 1 of the first example.
- FIGS. 4 and 5 are plan views showing the contact film in the sheet-like probe 10 on an enlarged scale. It is a sectional view for explanation.
- the sheet-like probe 10 has a circular frame plate 11 made of metal with a plurality of openings formed therein.
- the opening 12 of the frame plate 11 is formed corresponding to the pattern of the electrode region in which the electrodes to be inspected are formed in all the integrated circuits formed in the wafer to be inspected.
- the opening 12 is easily formed by etching treatment.
- nickel alloy steel such as 42 alloy, invar, kovar, is preferred.
- the linear thermal expansion coefficient of 3X ⁇ - 5 ⁇ following more preferably preferably is Rukoto device used as one 1 X 10- 7 ⁇ 1 X IO K , particularly preferably one 1 is an X 10 ⁇ 8X 10- 6 ⁇ .
- the material constituting the frame plate 11 include invars such as invar.
- invars such as invar.
- One type alloy Elinvar type alloy such as Elinvar, superinvar, Kovar, alloy such as 42 alloy or alloy steel.
- the thickness of the frame plate 11 is preferably 10 to 200 ⁇ m, more preferably 10 to 150 ⁇ .
- this thickness is too small, the strength required for the frame plate for supporting the contact film 15 may not be obtained. On the other hand, if this thickness is excessive, it may be difficult to form the opening 12 with high dimensional accuracy by an etching process in the manufacturing method described later.
- a metal film 18 is integrally formed on one surface of the frame plate 11 via an adhesive layer 19, and a plurality of contact films 15 are formed on the metal film 18.
- the contact film 15 is supported by the frame plate 11 via the adhesive layer 19 and the metal film 18.
- a circular ring-shaped holding member 14 is disposed along the peripheral edge of the frame plate 11, and the frame plate 11 is held by the holding member 14.
- the metal film 18 is made of the same material as that of the back electrode portion 17b in the electrode structure 17 described later.
- silicone rubber adhesive epoxy adhesive, polyimide adhesive, cyanoacrylate adhesive, polyurethane adhesive, etc. can be used! / .
- the material constituting the holding member 14 is an invar type alloy such as Invar or Super Invar, an Elinvar type alloy such as Elinvar, a low thermal expansion metal material such as Kovar or 42 alloy, or alumina, silicon carbide, silicon nitride, etc.
- invar type alloy such as Invar or Super Invar
- Elinvar type alloy such as Elinvar
- low thermal expansion metal material such as Kovar or 42 alloy
- alumina silicon carbide, silicon nitride, etc.
- the ceramic materials can be used!
- Each of the contact films 15 has a flexible insulating film 16, and a plurality of electrode structures 17 made of metal extending in the thickness direction of the insulating film 16 are objects to be inspected.
- the contact film 15 is arranged away from each other in the surface direction of the insulating film 16. Each of which is positioned within the opening 12 of the frame plate 11. ing.
- Each of the electrode structures 17 includes a protruding surface electrode portion 17 a exposed on the surface of the insulating film 16 and a plate-like back surface electrode portion 17 b exposed on the back surface of the insulating film 16 in the thickness direction of the insulating film 16. It is configured to be integrally connected to each other by a short-circuit portion 17c extending therethrough!
- the material constituting the insulating film 16 is not particularly limited as long as it is a flexible material having insulating properties, and a resin material such as polyimide or liquid crystal polymer, or a composite material thereof can be used. In the manufacturing method described later, it is preferable to use polyimide because a through hole for an electrode structure can be easily formed by etching. As other materials constituting the insulating film 16, a mesh or a nonwoven fabric, or a material in which these are impregnated with a resin or an elastic polymer substance can be used.
- the fibers forming such a mesh or nonwoven fabric aramide fibers, polyethylene fibers, polyarylate fibers, nylon fibers, fluorine resin fibers such as Teflon (registered trademark) fibers, and organic fibers such as polyester fibers can be used.
- the flexibility of the entire contact film 15 is not greatly reduced even when the electrode structures 17 are arranged at a small pitch. Even if there are variations in the protrusion height of 17 and the protrusion height of the electrode to be inspected, the contact film 15 is sufficiently absorbed by the flexibility of the contact film 15 to ensure stable electrical connection to each of the electrodes to be inspected. Can be achieved.
- the thickness of the insulating film 16 is not particularly limited as long as the flexibility of the insulating film 16 is not impaired, but is preferably 5 to 150 m, more preferably 7 to: LOO / zm Is 10-50 ⁇ m.
- the electrode structure 17 As a material constituting the electrode structure 17, nickel, iron, copper, gold, silver, noradium, iron, cobalt, tungsten, rhodium, or an alloy or alloy steel thereof can be used.
- the structure 17 may be composed of a single metal as a whole, or may be composed of an alloy of two or more metals or an alloy alloy, or a laminate of two or more metals. Good.
- the electrode structure 17 of the sheet-like probe and the electrode to be inspected are brought into contact with each other, and the surface of the electrode structure 17 is It is necessary to achieve electrical connection between the electrode structure 17 and the electrode to be inspected by destroying the oxide film on the surface of the electrode to be inspected by the surface electrode portion 17a. Therefore, it is preferable that the surface electrode portion 17a of the electrode structure 17 has a hardness that can easily break the oxide film. In order to obtain such a surface electrode portion 17a, the metal constituting the surface electrode portion 17a can contain a powder material with high hardness.
- the electrode structure 17 As such a powder substance, diamond powder, silicon nitride, silicon carbide, ceramics, glass or the like can be used. By containing an appropriate amount of these non-conductive powder substances, the electrode structure 17 The oxide film formed on the surface of the electrode to be inspected can be destroyed by the surface electrode portion 17a of the electrode structure 17 without impairing the conductivity. Further, in order to easily destroy the oxide film on the surface of the electrode to be inspected, the shape of the surface electrode portion 17a in the electrode structure 17 is made to be a sharp protrusion, or the surface of the surface electrode portion 17a is made fine. Unevenness can be formed.
- the pitch p of the electrode structure 17 in the contact film 15 is set according to the pitch of the inspection electrode of the wafer to be inspected, and is preferably 40 to 250 / ⁇ ⁇ , for example. It is preferably 40-150 111.
- the “pitch of the electrode structure” means the shortest distance between the centers of the adjacent electrode structures.
- the ratio of the protrusion height to the diameter R in the surface electrode portion 17a is preferably 0.2 to 3, more preferably 0.25 to 2.5.
- the diameter R of the surface electrode portion 17a is preferably 1 to 3 times the diameter r of the short-circuit portion 17c, more preferably 1 to 2 times.
- the diameter R of the surface electrode portion 17a is preferably 30 to 75% of the pitch p of the electrode structure 17, more preferably 40 to 60%.
- the outer diameter L of the back electrode portion 17b may be larger than the diameter r of the short-circuit portion 17c and smaller than the pitch p of the electrode structure 17, but it should be as large as possible. Is preferred Thus, for example, a stable electrical connection can be reliably achieved even for an anisotropic conductive sheet.
- the diameter r of the short-circuit portion 17c is preferably 15 to 75% of the pitch p of the electrode structure 17, more preferably 20 to 65%.
- the protruding height of the surface electrode portion 17a is 15 to 50 m in that stable electrical connection can be achieved with respect to the electrode to be inspected. More preferably, it is 15-30 ⁇ m.
- the diameter R of the surface electrode portion 17a is a force set in consideration of the above conditions and the diameter of the electrode to be inspected, for example, 30 to 200 ⁇ m, preferably 35 to 150 ⁇ m.
- the diameter r of the short-circuit portion 17c is preferably 10 to 120 / ⁇ ⁇ , more preferably 15 to 100 / ⁇ ⁇ , in that a sufficiently high strength can be obtained.
- the thickness of the back electrode portion 17b is preferably 15 to 150 ⁇ m, more preferably 20 to LOO ⁇ m, in that the strength is sufficiently high and excellent repeated durability can be obtained.
- a coating film may be formed on the front electrode portion 17a and the back electrode portion 17b in the electrode structure 17, if necessary.
- the surface electrode portion 17a is made of a diffusion-resistant metal such as silver, palladium, or rhodium from the viewpoint of preventing the solder material from diffusing. It is preferable to form a coating film.
- Such a sheet-like probe 10 is manufactured as follows.
- the resin film 16A for insulating film is integrally formed on one surface of the metal foil 18A for the back electrode portion made of the same material as the back electrode portion 17b in the electrode structure 17 to be formed.
- a circular laminated body 15 A is prepared.
- a circular frame plate 11 in which a plurality of openings 12 are formed corresponding to the pattern of the electrode region where the inspected electrode of the integrated circuit is formed on the wafer to be inspected is produced.
- the protective tape 20 is disposed on one surface of the frame plate 11 along the peripheral edge thereof.
- a method of forming the opening 12 of the frame plate 11 an etching method or the like can be used.
- an adhesive layer 19 made of, for example, an adhesive resin is formed, and a frame plate provided with a protective tape 20 is adhered as shown in FIG.
- laser processing, etching, or the like can be used as a method of forming the through hole 17H in the insulating film resin sheet 16A.
- the back surface of the frame plate 11 and the opening 12 are covered with a protective tape (not shown), and the metal foil 18A for the back surface electrode portion in the laminate 15A is subjected to a plating process, as shown in FIG.
- a short-circuit portion 17c integrally connected to the metal foil 18A for the back electrode portion is formed, and is integrally connected to the short-circuit portion 17c.
- the surface electrode portion 17a that protrudes the surface force of the resin film 16A for insulating film is formed.
- the protective tape is removed from the frame plate 11, and a portion of the metal foil 18A for the back electrode part is removed by removing the exposed portion of the adhesive layer 19 from the opening 12 of the frame plate 11 as shown in FIG.
- a plurality of back surface electrode portions 17b integrally connected to the short-circuited portion 17c are formed by etching the exposed portion of the metal foil 18A for the back surface electrode portion.
- the electrode structure 17 is formed.
- the insulating film resin sheet 16A is etched to remove a part thereof, thereby forming a plurality of independent insulating films 16 as shown in FIG.
- a plurality of contact films 15 each formed by arranging a plurality of electrode structures 17 extending through the insulating film 16 in the thickness direction is formed.
- the protective tape 20 (see FIG. 8) is removed from the peripheral portion of the frame plate 11, and then a holding member is disposed and fixed on the peripheral portion on the back surface of the frame plate 11, thereby obtaining the structure shown in FIGS.
- the sheet probe 10 shown is obtained.
- the anisotropic conductive connector 40 includes a disk-shaped frame plate 41 in which a plurality of openings 42 extending through the thickness direction are formed.
- the opening 42 of the frame plate 41 is formed corresponding to the pattern of the electrode region in which the electrodes to be inspected are formed in all the integrated circuits formed on the wafer to be inspected.
- To frame plate 41 are arranged in a state in which a plurality of elastic anisotropic conductive films 50 having conductivity in the thickness direction are supported by the opening edge portion of the frame plate 41 so as to block one opening 42.
- Each of the elastic anisotropic conductive films 50 is made of an elastic polymer material, and is formed around a plurality of connection conductive parts 52 extending in the thickness direction, and around each of the connection conductive parts 52.
- each of the connecting conductive portions 52 has a functional portion 51 including an insulating portion 53 that insulates the conductive portions 52 from each other, and the functional portion 51 is disposed so as to be positioned in the opening 42 of the frame plate 41.
- the conductive portion 52 for connection in the functional portion 51 is arranged according to a pattern corresponding to the pattern of the electrode to be inspected in the electrode area in the integrated circuit formed on the wafer to be inspected.
- a supported portion 55 fixedly supported by the opening edge portion of the frame plate 41 is formed integrally with the functional portion 51 at the periphery of the functional portion 51.
- the supported portion 55 in this example is formed in a bifurcated shape, and is fixedly supported in a state of being closely attached so as to grip the opening edge portion of the frame plate 41.
- the conductive particles P exhibiting magnetism are densely contained in an aligned state in the thickness direction.
- the insulating part 53 contains no or almost no conductive particles P.
- protruding portions 54 that project other surface forces are formed at the positions where the connecting conductive portion 52 and its peripheral portion are located. Has been.
- the thickness of the frame plate 41 is preferably 20 to 600 ⁇ m, and more preferably 40 to 400 ⁇ m, depending on the material.
- this thickness is less than 20 m, the strength required when using the anisotropically conductive connector 40 is not obtained, the durability becomes low, and the shape of the frame plate 41 is maintained immediately. As a result, the anisotropic conductive connector 40 is poor in handling and performance.
- the thickness exceeds 600 m, the elastic anisotropic conductive film 50 formed in the opening 42 becomes excessively thick, and the conductive portion 52 for connection has good conductivity and adjacent connection. It may be difficult to obtain insulation between the conductive parts 52 for use.
- the shape and size in the plane direction at the opening 42 of the frame plate 41 are designed according to the size, pitch and pattern of the inspected electrode of the wafer to be inspected.
- the material constituting the frame plate 41 is not particularly limited as long as the frame plate 41 is not easily deformed and has a rigidity that allows its shape to be stably maintained.
- Various materials such as a metal material, a ceramic material, and a resin material can be used.
- the frame plate 41 is made of, for example, a metal material, an insulating film is formed on the surface of the frame plate 41, and finally.
- metal material constituting the frame plate 41 include metals such as iron, copper, nickel, titanium, and aluminum, or alloys or alloy steels in which two or more of these are combined.
- the frame plate 41 As a material for forming the frame plate 41, more preferably it is preferred instrument linear thermal expansion coefficient used the following 3 X 10- 5 ⁇ one 1 X 10- 7 ⁇ 1 X ⁇ - 5 ⁇ , particularly preferably 1 X 10- 6 ⁇ 8 X 10- 6 / ⁇ .
- Such materials include Invar type alloys such as Invar, Elinvar type alloys such as Elinvar, magnetic metal alloys such as Super Invar, Kovar, and 42 alloy, or alloy steel.
- the total thickness of the elastic anisotropic conductive film 50 is preferably 50 to 3000 ⁇ m, more preferably 70 to 2500 ⁇ m, particularly preferably. 10 0-2000 ⁇ m. If this thickness is 50 ⁇ m or more, the elastic anisotropic conductive film 50 having sufficient strength can be obtained reliably. On the other hand, if the thickness is 3000 m or less, the connecting conductive portion 52 having the required conductive characteristics can be obtained with certainty.
- the protrusion height of the protrusions 54 is preferably 20% or more, more preferably 10% or more of the total thickness of the protrusions 54.
- the protrusion height of the protrusion 54 is preferably 100% or less of the shortest width or diameter of the protrusion 54, more preferably 70% or less.
- the thickness of the supported portion 55 is preferably 5 to 600 m, more preferably 10 to 500 ⁇ m, particularly preferably 20 to 400 ⁇ m. It is.
- the supported portion 55 be formed in a bifurcated shape. .
- the elastic polymer material constituting the elastic anisotropic conductive film 50 a heat-resistant polymer material having a crosslinked structure is preferred.
- Various materials can be used as the curable polymer material-forming material that can be used to obtain a strong cross-linked polymer material.
- silicone rubber polybutadiene rubber, natural rubber, poly Conjugated gen-based rubbers such as isoprene rubber, styrene-butadiene copolymer rubber, acrylonitrile-butadiene copolymer rubber, and hydrogenated products thereof, styrene-butadiene gen block copolymer rubber, styrene isoprene block copolymer Block copolymer rubbers such as these, hydrogenated products thereof, black mouth plain, urethane rubber, polyester rubber, epichlorohydrin rubber, ethylene propylene copolymer rubber, ethylene propylene copolymer rubber, soft liquid epoxy rubber, etc. It is done.
- silicone rubber is preferable from the viewpoints of moldability and electrical characteristics.
- the silicone rubber is preferably one obtained by crosslinking or condensing liquid silicone rubber.
- the liquid silicone rubber preferably has a viscosity of 10 5 poise or less at a strain rate of 10- ⁇ ec, and is any of a condensation type, an addition type, a bur group or a hydroxyl group-containing one. May be. Specific examples include dimethyl silicone raw rubber, methyl beer silicone raw rubber, and methyl vinyl silicone raw rubber.
- liquid silicone rubber containing a bur group is usually dimethyldichlorosilane or dimethyldialkoxysilane, and dimethylvinylchlorosilane or dimethylvinylalkoxysilane.
- dimethyldichlorosilane or dimethyldialkoxysilane and dimethylvinylchlorosilane or dimethylvinylalkoxysilane.
- it can be obtained from cocoon by subjecting it to hydrolysis and condensation, followed by fractionation by repeated dissolution and precipitation, for example.
- liquid silicone rubber containing vinyl groups at both ends is otatamethylcyclotetra Cyclic siloxanes such as siloxane are polymerized in the presence of a catalyst, and for example, dimethyldibutylsiloxane is used as a polymerization terminator, and other reaction conditions (for example, the amount of cyclic siloxane and polymerization terminator It is obtained by appropriately selecting (quantity).
- a catalyst for the cation polymerization
- alkali such as tetramethylammonium hydroxide and n-butylphosphonium hydroxide or silanolate solution thereof can be used, and the reaction temperature is as follows. For example, 80 to 130 ° C.
- Such a vinyl group-containing polydimethylsiloxane preferably has a molecular weight Mw (standard polystyrene equivalent weight average molecular weight; the same shall apply hereinafter) of 10,000 to 40,000.
- Mw standard polystyrene equivalent weight average molecular weight; the same shall apply hereinafter
- the molecular weight distribution index (the value of the ratio MwZMn between the standard polystyrene equivalent weight average molecular weight Mw and the standard polystyrene equivalent number average molecular weight Mn; the same shall apply hereinafter). Is preferably 2 or less.
- a liquid silicone rubber containing hydroxyl groups (hydroxyl group-containing polydimethylsiloxane) usually contains dimethyldichlorosilane or dimethyldialkoxysilane in the presence of dimethylhydrochlorosilane or dimethylhydroalkoxysilane! / Then, it is obtained by subjecting it to hydrolysis and condensation, for example, followed by fractionation by repeated dissolution and precipitation.
- cyclic siloxane is polymerized in the presence of a catalyst, and as a polymerization terminator, dimethylolhydrochlorosilane, methinoresihydrochlorosilane, dimethylolhydroalkoxysilane, or the like is used as a polymerization terminator, and other reaction conditions (for example, The amount of the cyclic siloxane and the amount of the polymerization terminator can be selected as appropriate.
- the catalyst for the cation polymerization alkali such as hydroxy-tetramethyl ammonium and ⁇ -butyl phosphonium hydroxide or silanolate solutions thereof can be used, and the reaction temperature is For example, it is 80 to 130 ° C.
- Such a hydroxyl group-containing polydimethylsiloxane preferably has a molecular weight Mw of 10,000 to 40,000. From the viewpoint of heat resistance of the elastic anisotropic conductive film 50 to be obtained, those having a molecular weight distribution index of 2 or less are preferred.
- any one of the above-mentioned bur group-containing polydimethylsiloxane and hydroxyl group-containing polydimethylsiloxane can be used, and both of them can be used in combination. Tochidaru.
- the polymer substance-forming material may contain a curing catalyst for curing the polymer substance-forming material.
- a curing catalyst an organic peroxide, a fatty acid amine compound, a hydrosilylation catalyst, or the like can be used.
- organic peroxide used as the curing catalyst examples include benzoyl peroxide, bisdicyclobenzoyl peroxide, dicumyl peroxide and ditertiary butyl peroxide.
- fatty acid azo compound used as the curing catalyst include azobisisobutyl nitrile.
- Specific examples of those that can be used as a catalyst for the hydrosilylation reaction include chloroplatinic acid and its salts, platinum unsaturated group-containing siloxane complexes, bululsiloxane-platinum complexes, platinum and 1,3 dibutyltetramethyldisiloxane. And known complexes such as triorganophosphine or phosphite / platinum complex, acetyl cetate platinum chelate, and cyclic gen / platinum complex.
- the amount of the curing catalyst used is appropriately selected in consideration of the type of polymer substance forming material, the type of curing catalyst, and other curing processing conditions, but usually 3 to 100 parts by weight of the polymer substance forming material. 15 parts by weight.
- the elastic anisotropic conductive film 50 is formed in the formation of the elastic anisotropic conductive film 50.
- a material exhibiting magnetism include particles of metals such as iron, nickel, and corona, particles of these alloys, particles containing these metals, or these particles.
- Core particles with the surface of the core particles coated with a metal with good conductivity such as gold, silver, noradium, rhodium, or inorganic substance particles such as non-magnetic metal particles or glass beads, or polymer particles
- the core particles are coated with a conductive magnetic material such as nickel or cobalt on the surface of the core particles, or the core particles are made of a conductive magnetic material and a conductive material. And those coated with both good metals.
- nickel particles as core particles, and the surface of which is coated with a metal having good conductivity such as gold or silver.
- the means for coating the surface of the core particles with the conductive metal is not particularly limited, and can be performed by, for example, electroless plating.
- the coverage of the conductive metal on the particle surface is preferably 40% or more, more preferably 45% or more, and particularly preferably 47 to 95%.
- the coating amount of the conductive metal is preferably 2.5 to 50% by weight of the core particles, more preferably 3 to 45% by weight, still more preferably 3.5 to 40% by weight, particularly preferably. Is 5-30% by weight.
- the conductive particles P preferably have a particle size of 1 to 500 ⁇ m, more preferably 2 to 400 m, more preferably 5 to 300 m, and particularly preferably 10. ⁇ 150 m.
- the particle size distribution (DwZDn) of the conductive particles P is preferably 1 to: LO, more preferably 1 to 7, still more preferably 1 to 5, and particularly preferably 1 to 4.
- the elastic anisotropic conductive film 50 obtained can be easily deformed under pressure, and the connecting conductive portion 52 in the elastic anisotropic conductive film 50 can be obtained. In this case, sufficient electrical contact can be obtained between the conductive particles P.
- the conductive particles P having such an average particle diameter are prepared by classifying the conductive particles and Z or core particles forming the conductive particles with a classifier such as an air classifier or a sonic sieve. be able to. Specific conditions for the classification treatment are appropriately set according to the average particle size and particle size distribution of the target conductive particles, the type of the classification device, and the like.
- the shape of the conductive particles P is not particularly limited, but is spherical, star-shaped or aggregated in that they can be easily dispersed in the polymer material-forming material. It is preferable that it is a lump with secondary particles.
- the moisture content of the conductive particles P is preferably 5% or less, more preferably 3%. Hereinafter, it is more preferably 2% or less, particularly preferably 1% or less.
- the amount of the coupling agent used is appropriately selected within a range that does not affect the conductivity of the conductive particles P, but the coupling agent coverage on the surface of the conductive particles P (relative to the surface area of the conductive core particles). More preferably, the coating ratio is 7 to LOO%, more preferably 10 to LOO%, and most preferably 20 to 20%. The amount is 100%.
- the content ratio of the conductive particles P in the connection conductive part 52 of the functional part 51 is preferably 10 to 60%, preferably 15 to 50% in terms of volume fraction. When this ratio is less than 10%, it is a force S that the conductive part 52 for connection having a sufficiently small electric resistance value cannot be obtained. On the other hand, if this ratio exceeds 60%, the obtained connecting conductive part 52 may become brittle, and the elasticity necessary for the connecting conductive part 52 may not be obtained immediately.
- an inorganic filler such as ordinary silica powder, colloidal silica, airgel silica, alumina, or the like can be contained as necessary.
- an inorganic filler such as ordinary silica powder, colloidal silica, airgel silica, alumina, or the like can be contained as necessary.
- the amount of such an inorganic filler used is not particularly limited, but if it is used too much, movement of the conductive particles P due to a magnetic field is greatly hindered in the production method described later, which is not preferable.
- Such an anisotropic conductive connector 40 can be manufactured by a method described in, for example, JP-A-2002-334732.
- the frame in the sheet-like probe 10 is Each of the openings 12 of the elastic plate 11 is sized to receive the outer shape in the surface direction of the elastic anisotropic conductive film 50 of the anisotropic conductive connector 40.
- the opening 12 of the frame plate 11 in the sheet-like probe 10 is rectangular and the outer shape in the surface direction of the elastic anisotropic conductive film 50 is rectangular.
- the vertical and horizontal dimensions of the elastic anisotropic conductive film 50 are larger than the vertical and horizontal dimensions.
- the ratio h / d is preferably 1.2 or more, more preferably 1.5 or more, and particularly preferably 1.8 or more.
- the frame plate 11 of the sheet-like probe 10 is anisotropically conductive when the connecting conductive portion 52 is pressed in the thickness direction by the back electrode portion 17b.
- the connection conductive portion 52 is not sufficiently compressed because it contacts the frame plate 41 of the conductive connector 40, and as a result, the required conductivity of the connection conductive portion 52 may not be obtained.
- each force of the opening 12 of the frame plate 11 in the sheet-like probe 10 is different from that of the anisotropic conductive film 50 of the anisotropic conductive connector 40 in the surface direction.
- the frame plate 11 of the sheet-like probe 10 becomes the elastic anisotropic conductive film of the anisotropic conductive connector 40. Therefore, the connecting conductive portion 52 of the elastic anisotropic conductive film 50 can be sufficiently compressed in the thickness direction, and as a result, a good electrical connection state to the wafer can be achieved. Can be reliably achieved.
- the sheet-like probe 10 is supported by the contact film 15 having the electrode structure 17 disposed in each of the plurality of openings 12 formed in the frame plate 11.
- each contact film 15 has a small area, but the contact film 15 having a small area has a small absolute amount of thermal expansion in the surface direction of the insulating film 16, so that the wafer force diameter to be inspected is 8 Even if the area of the electrode to be inspected has a large area of an inch or more and the pitch of the electrode to be inspected is extremely small, the positional displacement between the electrode structure 17 and the electrode to be inspected due to temperature change It can be surely prevented.
- the anisotropic conductive connector 40 is configured such that the elastic anisotropic conductive film 50 is disposed and supported in each of the plurality of openings 12 formed in the frame plate 41, whereby the elastic anisotropic conductive film 50 is provided.
- Each of the anisotropic anisotropic conductive films 50 having a small area and a small area has a small absolute amount of thermal expansion in the surface direction, so that the wafer to be inspected has a large area of 8 inches or more in diameter. Even if the pitch of the electrodes to be inspected is very small V, it is possible to reliably prevent displacement between the connecting conductive portion and the electrode structure due to temperature change. Therefore, in the burn-in test, a good electrical connection state to the wafer can be stably maintained.
- the conductive portion 52 for connection of the elastic anisotropic conductive film 50 is reduced. Since the film can be sufficiently compressed in the thickness direction, a good electrical connection state to the wafer can be achieved more reliably.
- FIG. 17 is a plan view showing a second example of the probe member according to the present invention
- FIG. 18 is an explanatory cross-sectional view showing the configuration of the main part of the probe member of the second example. is there.
- the probe member 1 of the second example is used for performing a probe test of each of the integrated circuits in a wafer state on, for example, a wafer on which a plurality of integrated circuits are formed. 10 and an anisotropic conductive connector 40 disposed on the back surface of the sheet-like probe 10.
- the sheet-like probe 10 in the probe member 1 of the second example has a frame plate 11 made of metal in which a plurality of openings are formed.
- the opening 12 of the frame plate 11 corresponds to the pattern of the electrode region in which the electrodes to be inspected are formed in, for example, 32 (8 ⁇ 4) integrated circuits formed on the wafer to be inspected. Is formed.
- Other configurations of the sheet-like probe 10 are the same as those of the sheet-like probe 10 of the probe member 1 of the first example (see FIGS. 4 and 5).
- the sheet-like probe 10 in the probe member 1 of the second example can be manufactured in the same manner as the first sheet-like probe 10.
- the anisotropic conductive connector 40 includes a rectangular plate-like frame plate 41 in which a plurality of openings 42 extending through the thickness direction are formed.
- This frame The opening 42 of the plate 41 corresponds to the pattern of the electrode region where the electrodes to be inspected are formed in, for example, 32 (8 ⁇ 4) integrated circuits among the integrated circuits formed on the wafer to be inspected. Is formed.
- a plurality of elastic anisotropic conductive films 50 having conductivity in the thickness direction are arranged on the frame plate 41 so as to be supported by the opening edge portions of the frame plate 41 so as to block the one opening 42, respectively.
- the Other configurations of the anisotropic conductive connector 40 are the same as those of the anisotropic conductive connector 40 in the probe member 1 of the first example (see FIG. 15).
- each of the openings 12 of the frame plate 11 in the sheet-like probe 10 receives the outer shape in the surface direction of the elastic anisotropic conductive film 50 of the anisotropic conductive connector 40. It is the size to get. Specifically, since the opening 12 of the frame plate 11 in the sheet-like probe 10 is rectangular and the outer shape in the surface direction of the elastic anisotropic conductive film 50 is rectangular, the opening of the frame plate 11 in the sheet-like probe 10 is The vertical and horizontal dimensions of 12 are larger than the vertical and horizontal dimensions of the elastic anisotropic conductive film 50.
- the level of the surface of the frame plate 41 (upper surface in FIG. 18) in the anisotropic conductive connector 40 and the level of the surface side end surface (upper surface in FIG. 18) of the connecting conductive portion 52 of the elastic anisotropic conductive film 50 When the gap is h, and the gap between the level of the back surface of the frame plate 11 (the lower surface in FIG. 18) and the level of the electrode surface of the back electrode portion (the lower surface in FIG. 18) is d, hZd
- the value of is preferably 1.2 or more.
- each force of the opening 12 of the frame plate 11 in the sheet-like probe 10 is different from that of the anisotropic conductive film 50 of the anisotropic conductive connector 40 in the surface direction.
- the frame plate 11 of the sheet-like probe 10 becomes the elastic anisotropic conductive film of the anisotropic conductive connector 40. Therefore, the connecting conductive portion 52 of the elastic anisotropic conductive film 50 can be sufficiently compressed in the thickness direction, and as a result, a good electrical connection state to the wafer can be achieved. Can be reliably achieved.
- the sheet-like probe 10 is supported by the contact film 15 having the electrode structure 17 disposed in each of the plurality of openings 12 formed in the frame plate 11. Therefore, each of the contact films 15 has a small area and a small area. Since the absolute amount of thermal expansion in the surface direction of the insulating film 16 is small, the dot film 15 has a large area of a wafer force diameter of 8 inches or more to be inspected and the pitch of the electrodes to be inspected is extremely small. Even if it is a thing, the position shift of the electrode structure 17 and to-be-inspected electrode by a temperature change can be prevented reliably.
- the anisotropic conductive connector 40 is configured such that the elastic anisotropic conductive film 50 is disposed and supported in each of the plurality of openings 12 formed in the frame plate 41, so that each of the elastic anisotropic conductive films 50 is Since the elastic anisotropic conductive film 50 with a small area and a small area has a small absolute amount of thermal expansion in the surface direction, the wafer force diameter to be inspected is a large area of 8 inches or more and is covered. Even if the pitch of the inspection electrodes is extremely small, it is possible to reliably prevent displacement of the connection conductive portion and the electrode structure due to temperature change. Therefore, it is possible to stably maintain a good electrical connection state to the wafer in the flow test.
- the conductive portion 52 for connection of the elastic anisotropic conductive film 50 is reduced. Since the film can be sufficiently compressed in the thickness direction, a good electrical connection state to the wafer can be achieved more reliably.
- FIG. 21 is a cross-sectional view illustrating the configuration of a first example of a wafer inspection probe card (hereinafter simply referred to as a “probe card”) according to the present invention
- FIG. 22 is a plan view of the first example. It is sectional drawing for description which shows the structure of the principal part of a lobe card.
- the probe card 30 of the first example is used for performing a burn-in test of each integrated circuit in a batch on a wafer on which a plurality of integrated circuits are formed.
- the circuit board 31 and the probe member 1 of the first example arranged on one surface (the upper surface in FIGS. 21 and 22) of the inspection circuit board 31 are configured.
- the inspection circuit board 31 has a disk-shaped first substrate element 32, and the surface of the first substrate element 32 (upper surface in FIGS. 21 and 22).
- a regular octagonal plate-like second substrate element 35 is arranged, and this second substrate element 35 is held by a holder 34 fixed to the surface of the first substrate element 32.
- the first group A reinforcing member 37 is provided at the center of the back surface of the plate element 32.
- connection electrodes are formed in accordance with an appropriate pattern at the center of the surface of the first substrate element 32.
- a plurality of lead electrodes 33 are arranged along the circumferential direction of the first substrate element 32 at the peripheral portion on the back surface of the first substrate element 32. 33R is formed.
- the pattern of the lead electrode 33 is a pattern corresponding to the pattern of the input / output terminal of the controller in the wafer inspection apparatus described later.
- Each of the lead electrodes 33 is electrically connected to the connection electrode via an internal wiring (not shown).
- a plurality of inspection electrodes 36 correspond to the patterns of the electrodes to be inspected in all integrated circuits formed on the wafer to be inspected.
- the inspection electrode part 36R is formed in accordance with the pattern to be formed.
- a plurality of terminal electrodes are arranged according to an appropriate pattern, and each of the terminal electrodes is connected to the inspection electrode 36 via an internal wiring (not shown). It is electrically connected!
- connection electrode of the first substrate element 32 and the terminal electrode of the second substrate element 35 are electrically connected by appropriate means.
- the substrate material constituting the first substrate element 32 in the circuit board 31 for inspection conventionally known various materials can be used. Specific examples thereof include glass fiber reinforced epoxy resin, glass fiber. Examples thereof include composite resin substrate materials such as reinforced phenol resin, glass fiber reinforced polyimide resin, and glass fiber reinforced bismaleimide triazine resin.
- instrument Sen'netsu ⁇ expansion coefficient is used the following 3 X 10- 5 ZK 1 X 10- 7 ⁇ 1 X 10 "5 / ⁇ , particularly preferably 1 X 10- 6 ⁇ 6 X 10- 6 ⁇ .
- substrate materials Pyrex (registered trademark) glass, quartz glass, alumina, beryllia Inorganic substrate materials made of silicon carbide, aluminum nitride, boron nitride, etc., metal plates made of iron-nickel alloy steel such as 42 alloy, kovar, invar, etc., epoxy resin, polyimide resin, etc.
- stacked the resin of this is mentioned.
- the holder 34 has a regular octagonal opening 34K that conforms to the outer shape of the second substrate element 35, and the second substrate element 35 is accommodated in the opening 34K.
- the outer edge of the holder 34 is circular, and a step 34S is formed on the outer edge of the holder 34 along the circumferential direction.
- the probe member 1 is on the surface of the inspection circuit board 31, and each of the conductive portions 52 for connection of the anisotropic conductive connector 40 is the inspection electrode 36.
- the holding member 14 of the sheet-like probe 10 is engaged with and fixed to the step 34S of the holder 34.
- the wafer force diameter to be inspected is a large area of 8 inches or more. Even if the pitch of the test electrode is very small, it is possible to reliably achieve a good electrical connection state to the wafer, and in the burn-in test, it is possible to reliably shift the position of the test electrode due to temperature changes. Thus, it is possible to stably maintain a good electrical connection state to the wafer.
- FIG. 25 is an explanatory cross-sectional view showing the configuration of the second example of the probe card according to the present invention
- FIG. 26 is an explanatory cross-sectional view showing the configuration of the main part of the probe card of the second example. It is a figure.
- the probe card 30 of the second example is used to perform a probe test of each integrated circuit in a wafer state on a wafer on which a plurality of integrated circuits are formed, for example. 31 and the probe member 1 of the second example provided on one surface of the circuit board 31 for inspection.
- the inspection circuit board 31 of the probe card 30 of the second example As shown in FIG. 27, among the integrated circuits formed on the surface of the second substrate element 35 on the wafer to be inspected.
- an inspection electrode portion 36R in which a plurality of inspection electrodes 36 are arranged according to a pattern corresponding to the pattern of the inspection target electrode in 32 (8 ⁇ 4) integrated circuits is formed.
- Other configurations of the inspection circuit board 31 are basically the same as those of the inspection circuit board 31 in the probe card 30 of the first example.
- the probe member 1 is a circuit board for inspection.
- Each of the conductive portions 52 for connection of the anisotropic conductive connector 40 is arranged on the surface of 31 so as to contact each of the inspection electrodes 36, and the holding member 14 of the sheet-like probe 10 is engaged with the step 34S of the holder 34. Combined and fixed.
- the wafer force diameter to be inspected is a large area of 8 inches or more. Even if the pitch of the test electrode is very small, it is possible to reliably achieve a good electrical connection state to the wafer, and in the probe test, the position shift with respect to the test electrode due to temperature change is prevented. This can be reliably prevented, and a good electrical connection to the wafer can be stably maintained.
- FIG. 28 is a sectional view for explaining the outline of the configuration of the first example of the wafer inspection apparatus according to the present invention
- FIG. 29 is an enlarged view of the main part of the wafer inspection apparatus of the first example. It is sectional drawing for description.
- This first wafer inspection apparatus is for performing a burn-in test of the integrated circuit in a batch on the wafer for each of a plurality of integrated circuits formed on the wafer.
- the wafer inspection apparatus of the first example detects the temperature of the wafer 6 to be inspected, power supply for detecting the wafer 6, signal input / output control, and output signal from the wafer 6 to detect the wafer. It has a controller 2 for judging whether the integrated circuit in 6 is good or bad. As shown in FIG. 30, the controller 2 has an input / output terminal portion 3R on the lower surface of which a large number of input / output terminals 3 are arranged along the circumferential direction.
- the probe card 30 of the first example is held by appropriate holding means so that each force of the lead electrode 33 of the circuit board 31 for inspection faces the input / output terminal 3 of the controller 2. It is arranged in the state that was done.
- a connector 4 is arranged between the input / output terminal portion 3R of the controller 2 and the lead electrode portion 33R of the inspection circuit board 3 1 in the probe card 30 as shown in FIG.
- each of the lead electrodes 33 of the inspection circuit board 31 is electrically connected to each of the input / output terminals 3 of the controller 2.
- the connector 4 in the illustrated example includes a plurality of conductive pins 4A that can be elastically compressed in the length direction, and these conductive pins 4A.
- the conductive pins 4A are arranged so as to be positioned between the input / output terminals 3 of the controller 2 and the lead electrodes 33 formed on the first substrate element 32.
- a wafer mounting table 5 on which a wafer 6 to be inspected is mounted is provided below the probe card 30 below the probe card 30, a wafer mounting table 5 on which a wafer 6 to be inspected is mounted is provided.
- each of the connection conductive portions 52 in the elastic anisotropic conductive film 50 of the anisotropic conductive connector 40 is connected to the back surface of the inspection electrode 36 of the inspection circuit board 31 and the electrode structure 17 of the sheet-like probe 10.
- the conductive portion 52 is sandwiched and compressed in the thickness direction by the electrode portion 17b, whereby a conductive path is formed in the connecting conductive portion 52 in the thickness direction.
- the inspection target electrode 7 on the wafer 6 is inspected. Electrical connection between the circuit board 31 and the inspection electrode 36 is achieved. Thereafter, the wafer 6 is heated to a predetermined temperature via the wafer mounting table 5, and in this state, a required electrical inspection is performed for each of the plurality of integrated circuits in the wafer 6.
- FIG. 31 is a sectional view for explaining the outline of the configuration of the second example of the wafer inspection apparatus according to the present invention
- FIG. 32 shows the configuration of the main part of the wafer inspection apparatus of the second example.
- This wafer inspection apparatus has a plurality of integrated circuits formed on a wafer. For each of the paths, the probe test of the integrated circuit is performed in a wafer state.
- the wafer inspection apparatus of the second example is basically the same as the wafer inspection apparatus of the first example except that the probe card 30 of the second example is used instead of the probe card 30 of the first example. It is the composition.
- the probe card 30 is electrically connected to the electrodes 7 to be inspected of, for example, 32 integrated circuits in which the intermediate forces of all the integrated circuits formed on the wafer 6 are also selected. Then, by repeating the process of inspecting by electrically connecting the probe card 30 to the inspected electrodes 7 of a plurality of integrated circuits selected from other integrated circuits, the wafer 6 is repeated. Probe testing is performed on all integrated circuits formed on the board.
- the wafer inspection apparatus of the second example since the electrical connection to the inspection target electrode 7 of the wafer 6 to be inspected is achieved via the probe card 30 of the second example, the wafer 6
- the wafer 6 even in the case of a large area with a diameter of 8 inches or more and an extremely small pitch of the electrodes 7 to be inspected, it is possible to reliably achieve good electrical connection to the wafer in the burn-in test.
- the holding member 14 in the sheet-like probe 10 is not essential in the present invention.
- the elastic anisotropic conductive film 50 in the anisotropic conductive connector 40 is electrically connected to the electrode to be inspected, in addition to the connection conductive part 52 formed according to the pattern corresponding to the pattern of the electrode to be inspected.
- a conductive part for non-connection may be formed without being connected.
- the connector 4 that electrically connects the controller 2 and the inspection circuit board 31 in the wafer inspection apparatus is not limited to that shown in FIG. I can do it.
- the electrode structure 17 in the sheet-like probe 10 is not limited to that shown in FIG. 5, and various structures can be used.
- FIG. 33 is a cross-sectional view illustrating the structure of the main part of another example of a sheet-like probe that can be used for the probe member of the present invention.
- the electrode structure 17 in the sheet-like probe 10 includes a frustum-shaped surface electrode portion 17a, a flat plate-like back surface electrode portion 17b, and a surface electrode portion 17a having a distal end force that has a small diameter according to the direction toward the base end.
- the base end force continuously extends through the insulating film 16 in the thickness direction and is connected to the back surface electrode portion 17b, and the base end partial force of the front surface electrode portion 17a continues to the surface of the insulating film 16 And a holding portion 17d extending outward along the direction.
- the holding portion 17d in the electrode structure 17 is embedded in the insulating film 16, and in the illustrated example, the surface of the holding portion 17d is disposed on the same plane as the surface of the insulating film 16.
- the insulating protective layer 21 is provided so as to cover the surface of the insulating film 16 and the surface of the holding portion 17d of the electrode structure 17, and the surface electrode of the electrode structure 17 is provided.
- the portion 17a is in a state in which the surface force of the insulating protective layer 21 also protrudes.
- Other configurations of the sheet-like probe 10 are basically the same as those of the sheet-like probe 10 shown in FIG.
- the material constituting the insulating protective layer 21 is preferably a force-etchable material that can be used by appropriately selecting the medium force exemplified as the material constituting the insulating film 16, and polyimide is particularly preferred.
- the sheet-like probe 10 having such a configuration can be manufactured as follows, for example.
- the insulating protective layer resin sheet 21A, the metal foil 22 for the plating electrode integrally provided on the surface of the insulating protective layer resin sheet 21A, and the insulating protective layer container A laminated body 21 ⁇ / b> B comprising a holding part forming metal foil 23 integrally provided on the back surface of the fat sheet 21 ⁇ / b> A is prepared.
- the sum of the thickness and the thickness of the metal foil 23 for forming the holding portion is assumed to be equal to the protruding height of the surface electrode portion 17a to be formed.
- the metal foil 23 for forming a part has a thickness that is the thickness of the holding part 17d to be formed. Equivalent.
- the electrode structure 17 to be formed on the holding portion forming metal foil 23 as shown in FIG. A plurality of openings 23K are formed according to a pattern corresponding to this pattern.
- the insulating protective layer resin sheet 21A is subjected to an etching process on the exposed portion of the holding part forming metal foil 23 through the opening 23K, as shown in FIG.
- a plurality of tapered through-holes 21H each communicating with the opening 23K of the holding part forming metal foil 23 and having a small diameter toward the surface are formed on the back surface of the insulating protective layer grease sheet 21A. Is done.
- the holding portion is formed around each through hole 21H on the back surface of the insulating protective layer resin sheet 21A. 17d is formed.
- the insulating film resin sheet 16A is integrally laminated on the back surface of the insulating protective layer resin sheet 21A, and on the back surface of the insulating film resin sheet 16A.
- the back electrode part forming metal foil 18B is integrally laminated. Then, by performing photolithography and etching treatment on the metal foil 18B for forming the back electrode portion, the back surface of the electrode structure 17 to be formed on the metal foil 18B for forming the back electrode portion as shown in FIG.
- a plurality of openings 18K are formed according to a pattern corresponding to the electrode portion 17b pattern.
- the insulating film resin sheet 16A is subjected to etching treatment on the exposed portion through the opening 18K of the metal foil 18B for forming the back electrode part, as shown in FIG.
- the back surface force of the resin film 16A for insulating film which is in communication with the opening 18K of the metal foil 18B for forming the back electrode part and the through hole 21H of the resin sheet 21A for the insulating protective layer, has a smaller diameter toward the surface.
- a plurality of tapered through-holes 17H are formed.
- the etching agent for etching the holding part forming metal foil 23 and the back electrode part forming metal foil 18B is appropriately selected depending on the material constituting the metal foil.
- these metal foils are made of copper, for example, a salty ferric aqueous solution can be used.
- an etching solution for etching the insulating protective layer resin sheet 21A and the insulating film resin sheet 16A an amine-based etching solution, a hydrazine-based aqueous solution, a hydroxide-potassium hydroxide aqueous solution, or the like can be used.
- tapered through-holes with smaller diameters are formed in the insulating protective layer resin sheet 21A and the insulating film resin sheet 16A as the back surface force approaches the surface. can do.
- the laminate 21B is subjected to electrolytic plating treatment using the metal foil 22 for the plating electrode as an electrode, and the inside of each through-hole 21H of the insulating protective layer resin sheet 21A and the insulating film cage
- a front electrode portion 17a, a short-circuit portion 17c, and a back electrode portion 17b are formed. Is formed.
- each of the back surface electrode portions 17b is connected to each other via the back surface electrode portion forming metal foil 18B.
- the back electrode part 17b separated from each other is formed, and the metal film of the required form is formed. 18 is formed.
- the frame plate 11 is bonded onto the metal film 18 via the adhesive layer 19.
- a plurality of independent insulating protective layers 21 and insulating films 16 are formed as shown in FIG.
- a plurality of contact films 15 are formed.
- a sheet-like probe is obtained by arranging and fixing a holding member (not shown) at the peripheral edge of the rear surface of the frame plate 11.
- the insulating protective layer 21 is not essential. As shown in FIG. 47, the surface of the insulating film 16 and the surface of the holding portion 17d of the electrode structure 17 are exposed. Even so! As shown in FIG. 48, the holding portion 17d of the electrode structure 17 may be provided in a state in which a part thereof is embedded in the insulating film 16 and the surface force of the insulating film 16 protrudes. As shown in FIG. 49, the electrode structure 17 may have a configuration in which a holding portion is not provided.
- the holding portion 17d of the electrode structure 17 may be provided on the surface of the insulating film.
- the electrode structure 17 in the sheet-like probe 10 includes a conical surface electrode portion 17a, a back electrode portion 17b, and a surface electrode portion that have a diameter that decreases from the tip toward the base end
- the base end force of 17a continuously extends through the insulating film 16 in the thickness direction, and the short-circuit portion 17c connected to the back electrode portion 17b and the base end portion of the front electrode portion 17a continuously It may be composed of a holding portion 17d extending outward along the surface.
- a total of 393 square integrated circuits L each having a dimensional force of 3 ⁇ 4 mm X 8 mm were formed on a silicon wafer having a diameter of 8 inches.
- Each integrated circuit formed on the wafer has an electrode region to be inspected at the center, and the electrode region to be inspected has a vertical dimension of 200 ⁇ m and a horizontal dimension of 70 ⁇ m.
- Forty rectangular electrodes 7 to be inspected are arranged in a row in the horizontal direction at a pitch of 120 ⁇ m.
- the total number of electrodes to be inspected on the entire wafer is 15720, and all the electrodes 7 to be inspected are electrically insulated from each other.
- this wafer is referred to as “test wafer Wl”.
- test wafer W2 instead of electrically isolating all the electrodes to be inspected from each other, out of the 40 electrodes to be inspected in the integrated circuit, two of the outermost electrode to be inspected are counted every two. Except for being electrically connected to each other V ⁇ , 393 integrated circuits having the same configuration as the test wafer W1 were formed on the wafer. Hereinafter, this wafer is referred to as “test wafer W2.”
- This frame plate (11) has a circular shape with a diameter of 22 cm, a thickness of 25 ⁇ m, and has 393 openings (12) corresponding to the electrode area of the integrated circuit in the test wafer W1.
- the dimension of the opening (12) is 6.4 mm X l. 6 mm.
- Metal foil for plating electrodes made of copper with a diameter of 20 cm and a thickness of 4 m (2A) on both sides of an insulating protective layer resin sheet (21A) made of polyimide with a diameter of 20 cm and a thickness of 25 ⁇ m (2A)
- a protective film is formed on the entire surface of the metal foil (22) for the electrode for the laminate (21B) with a protective seal made of polyethylene terephthalate having a thickness of 25 ⁇ m, and the metal foil for holding part (23 A resist film having 15720 circular holes with a diameter of 55 ⁇ m was formed on the entire back surface of) in accordance with the pattern corresponding to the pattern of the test electrode formed on the test wafer W1.
- the exposure process is performed by irradiating 80 mJ ultraviolet rays with a high-pressure mercury lamp, and the development process is an operation of immersing in a developer composed of a 1% aqueous sodium hydroxide solution for 40 seconds. This was done by repeating twice.
- the holding part forming metal foil (23) is etched using a salty ferric etching solution at 50 ° C. for 30 seconds, whereby the holding part forming metal foil ( 2
- the amine protective sheet (21A) is etched using an amine-based polyimide etchant (“TPE-3000” manufactured by Toray Engineering Co., Ltd.) at 80 ° C for 10 minutes.
- TPE-3000 amine-based polyimide etchant
- 15720 through-holes (21H) communicating with the openings (23K) of the holding part forming metal foil (23) were formed in the insulating protective layer resin sheet (21A) (see FIG. 36). ).
- Each of the through holes (21H) has a tapered shape having a diameter that decreases from the back surface to the front surface of the insulating protective layer resin sheet (21A), and the opening diameter on the back surface side is 55 m.
- the opening diameter on the surface side was 20 m (average value).
- the resist film was removed from the laminate (21B) by immersing the laminate (21B) in a 45 ° C sodium hydroxide solution for 2 minutes.
- the laminated body (21B) was coated with a dry film resist (Hitachi Chemical Co., Ltd .: Photec RY-3210) with a thickness of 10 ⁇ m, and the through hole (23H) of the metal foil for holding part formation (23H) and its surroundings
- a resist pattern is formed so as to block the film, and the holding part is formed by subjecting the holding part forming metal foil (23) to an etching treatment using a ferric chloride etching solution at 50 ° C. for 30 seconds.
- a holding part (17d) was formed around the through hole (23H) of the metal foil (23) (see FIG. 37).
- the exposure process is performed by irradiating 80 mJ of ultraviolet light with a high-pressure mercury lamp, and the development process is performed by immersing in a developer composed of a 1% sodium hydroxide aqueous solution for 40 seconds. This was done by repeating twice. Then, the laminate (21B) was immersed in a 45 ° C. sodium hydroxide solution for 2 minutes to remove the resist pattern from the laminate (21B).
- the diameter is 20. on the insulating protective layer resin sheet (21A) in the laminate (21B).
- thermoplastic polyimide sheets manufactured by Nippon Steel Chemical Co., Ltd., trade name “S-Banex”
- the metal foil (18B) for forming the back electrode part consisting of 42 alloy with a diameter of 22cm and a thickness of 25 ⁇ m is stacked, and the conditions of 165 ° C, 40kgfZcm 2 for 1 hour
- the insulating protective layer resin sheet (21A), insulating film resin sheet (16A), and backside electrode part forming metal foil (18B) were integrated (see Fig. 38). .
- the back electrode part forming metal foil (18B) is subjected to an etching treatment at 50 ° C. for 30 seconds using a salty ferric etchant, thereby forming the back electrode part.
- 15720 openings (18K) communicating with the pattern holes of the resist film were formed (see Fig. 39).
- an amine-based polyimide etchant (Toray Industries, Inc.) was applied to the resin film for insulating film (16A).
- an amine-based polyimide etchant (Toray Industries, Inc.) was applied to the resin film for insulating film (16A).
- an amine-based polyimide etchant (Toray Industries, Inc.) was applied to the resin film for insulating film (16A).
- Each of the through-holes (17H) has a tapered shape in which the back surface force of the insulating film resin sheet (16A) also has a small diameter according to the direction of the surface, and the opening diameter on the back surface side is 60 m, The aperture diameter was 40 m (average value).
- the laminate (21B) was immersed in a plating bath containing nickel sulfamate, and subjected to electrolytic plating treatment using the metal foil for plating electrode (22) as an electrode, to obtain an insulating protective layer grease.
- the through hole (21H) of the sheet (21A) By filling metal into the through hole (21H) of the sheet (21A), the through hole (17H) of the resin film for insulating film (16A), and the pattern hole of the resist film, the surface electrode portion (17a ), A short-circuit portion (17c) and a back-side electrode portion (17b) were formed, thereby forming an electrode structure (17) (see FIG. 41).
- the laminate (21B) was immersed in a sodium hydroxide / sodium hydroxide solution at 45 ° C for 2 minutes to remove the metal foil (18B) force resist film for forming the back electrode part.
- a patterned resist film for patterning was formed on the metal foil for part formation (18B).
- the back electrode part forming metal foil (18B) is etched using a salty ferric etchant at 50 ° C for 30 seconds to obtain an electrode structure (17).
- a metal film (18) having a required form was formed on the back surface of the insulating film resin sheet (16A) (see FIG. 42).
- the resist film was removed from the metal foil (22) for the plating electrode and the metal film (18), and the frame plate (11) was bonded onto the metal film (18) via the adhesive layer (19) (Fig. 43).
- the frame plate (11), the insulating film resin sheet (16A), and the back electrode portion (17b) of the electrode structure (17) are covered with a resist film, and the metal foil (22) for the plating electrode Keep from the surface
- the protective film is peeled off, and the metal foil (22) for the plating electrode is etched using a salty ferric etching solution at 50 ° C for 30 seconds.
- the metal foil (22) was removed (see Figure 44).
- the insulating protective layer resin sheet (21A) was etched using an amine-based polyimide etchant (“TPE-3000” manufactured by Toray Engineering Co., Ltd.) at 80 ° C for 6 minutes.
- TPE-3000 amine-based polyimide etchant
- the surface force of 21A) was also projected (see Fig. 45).
- the frame plate (11), the insulating film resin sheet (16A), and the back electrode part (17b ) To remove the resist film.
- the surface electrode part (17a) of the electrode structure (17) and the surface of the insulating protective layer resin sheet (21A) were patterned using a dry film resist having a thickness of 25 ⁇ m. A resist film was formed. Then, an amine-based polyimide etching solution (“TPE-3000” manufactured by Toray Engineering Co., Ltd.) was used on the insulating protective layer resin sheet (21A) and the insulating film resin sheet (16A). C, by performing an etching process for 10 minutes, a plurality of insulating protective layers (21) and insulating films (16) separated from each other are formed, thereby opening the frame plate (11) ( A contact film (15) was formed on each of 12) (see FIG. 46). Then, immerse in an aqueous solution of sodium hydroxide at 45 ° C for 2 minutes. The resist film was removed from the surface electrode part (17a) and the insulating protective layer (21) of the electrode structure (17).
- TPE-3000 manufactured by Toray Engineering Co., Ltd.
- a silicone-based thermosetting adhesive (made by Shin-Etsu Chemical Co., Ltd .: product name 1300T) to the peripheral edge of the frame plate (11), and apply the silicone-based thermosetting adhesive while maintaining the temperature at 150 ° C.
- a ring-shaped holding member made of silicon nitride with an outer diameter of 220 mm, an inner diameter of 205 mm, and a thickness of 2 mm is placed in the part where the frame plate (11) and the holding member are pressed. By holding for a time, the holding member was adhered to the frame plate (11), and thus a sheet-like probe was manufactured.
- the frame plate is a disk with a diameter of 22 cm and a thickness of 25 ⁇ m, and the material is 42 alloy.
- the number of apertures in the frame plate is 393, each with a horizontal dimension of 6.4 mm, The dimension is 1.6mm.
- the material of the insulating film and insulating protective layer in each contact film is polyimide, the vertical and horizontal dimensions are 7.5 mm x 7.5 mm, the insulating film thickness is 25 ⁇ m, and the insulating protective layer thickness is 5 ⁇ m. is there.
- the number of electrode structures in each contact film is 40 (15720 in total), and they are arranged in a row at a pitch of 120 m in the horizontal direction.
- the surface electrode part in the electrode structure has a truncated cone shape, the tip part has a diameter of 20; ⁇ ⁇ , and the base part has a diameter of 55 m.
- the back electrode portion has a rectangular plate shape with a vertical and horizontal dimension of 60 m ⁇ 150 m and a thickness of 14 m.
- the short-circuited part has a truncated cone shape with a diameter of 40 m on the front side and a diameter of 60 m on the back side.
- the holding part is a circular ring with an outer diameter of 80 m.
- the gap d between the level of the back surface of the frame plate and the level of the electrode surface of the back surface electrode in the sheet-like probe is 15 ⁇ m.
- Magnetic core particles were prepared using commercially available nickel particles (Westaim, “FC1000”) as follows.
- the obtained nickel particles had a number average particle size of 7.4 / zm, a particle size variation coefficient of 27%, a BET specific surface area of 0.46 X 103m 2 Zkg, and a saturation magnetization of 0.6 Wb / m 2. It was.
- Magnetic core particle [A] This nickel particle is referred to as “magnetic core particle [A]”.
- the conductive particles thus obtained were charged with 2 L of pure water, stirred at room temperature for 2 minutes, and then allowed to stand for 1 minute to precipitate the conductive particles and remove the supernatant.
- the obtained conductive particles had a number average particle size of 7.3 m, a BET specific surface area of 0.38 X 103 m 2 Zkg, (the mass of gold forming the coating layer) Z (the mass of the magnetic core particles [A]).
- This conductive particle having a value of 0.3 is referred to as “conductive particle (a)”.
- a frame plate (41) having 393 openings (42) formed corresponding to each electrode area to be inspected of the test wafer W1 was manufactured under the following conditions.
- the frame plate (41), the material is of Kovar (coefficient of linear thermal expansion 5 X 10- 6 ZK), with diameter of 8 inches and a thickness of 60 mu m, the lateral dimension of the opening (42) Is 5400 ⁇ m and the vertical dimension is 320 ⁇ m.
- a circular air inflow hole is formed at the central position between the vertically adjacent openings, and its diameter is 1000 ⁇ m.
- the addition type liquid silicone rubber used is a two-part type consisting of liquid A and liquid B each having a viscosity of 250 Pa's, and the cured product has a compression set of 5%, durometer A hardness Of 32 and tear strength of 25 kNZm.
- a liquid and B liquid of two-component type addition type liquid silicone rubber were stirred and mixed at an equal ratio.
- a curing treatment is performed at 120 ° C for 30 minutes, resulting in a thickness of 12.7 mm and a diameter of 12.7 mm.
- a cylinder made of a cured silicone rubber with a thickness of 29 mm is manufactured, and 200 for this cylinder.
- Post-cure was performed for 4 hours.
- the cylindrical body thus obtained was used as a test piece, and the compression set at 150 ° C. and 2 ° C. was measured according to JIS K 6249.
- a 2.5 mm thick sheet was prepared by curing and post-curing the addition-type liquid silicone rubber under the same conditions as in (b) above.
- a crescent-shaped test piece is produced from this sheet by punching, and the tear strength at 23 ⁇ 2 ° C is measured according to JIS K 6249.
- the hardening treatment of the molding material layer was performed at 100 ° C. for 1 hour while applying a 2 T magnetic field in the thickness direction by an electromagnet.
- Each of the elastic anisotropic conductive films has a transverse dimension of 6. Omm and a longitudinal dimension of 1.2 mm. External force in the surface direction This is a size that can be received in each of the openings (size: 6.4 mm X l. 6 mm) in the above-mentioned sheet-like probe.
- 40 connecting conductive portions are arranged in a row in the horizontal direction at a pitch of 120 m with the insulating portions insulated from each other.
- Each of the conductive parts for connection has a horizontal dimension of 40 ⁇ m, a vertical dimension of 200 ⁇ m, a thickness of 130 ⁇ m, a protrusion height of the protrusion 38 of 15 ⁇ m, The thickness is 100 ⁇ m.
- a non-connection conductive portion is arranged between the connection conductive portion located on the outermost side in the lateral direction and the frame plate.
- Each of the non-connection conductive parts has a horizontal dimension of 60 m, a vertical dimension of 200 m, and a thickness force of 30 m.
- each supported portion of the elastic anisotropic conductive film (one thickness of the bifurcated portion) is 20 ⁇ m.
- the volume fraction was about 25% in all the connecting conductive portions.
- the gap h between the level of the surface of the frame plate in this anisotropic conductive connector and the level of the surface side end face of the conductive portion for connection of the elastic anisotropic conductive film is 35 m.
- test circuit board T1 A test circuit that uses alumina ceramics (linear thermal expansion coefficient: 4.8 X 10-so-K) as the substrate material, and the test electrode is formed according to the test Ueno and W1 test electrode pattern.
- a substrate was produced.
- the circuit board for inspection is a rectangle with an overall dimension of 30 cm x 30 cm, and the inspection electrode has a horizontal dimension of 60 m and a vertical dimension of 200 m. This test circuit board is called “test circuit board T1”.
- a test wafer W1 is placed on a test stand, and a sheet-like probe is placed on the surface of the test wafer W1, and each of the surface electrode portions is on a test electrode of the test wafer W1.
- the anisotropic conductive connector is positioned on the sheet probe so that each of the conductive parts for connection is positioned on the back electrode part of the sheet probe. did.
- the circuit board for inspection T1 was positioned so as to be positioned on the connecting conductive portion of the anisotropic conductive connector of each of the inspection electrodes. Further, the inspection circuit board T1 was pressed downward with a load of 160 kg (an average load applied to each electrode structure was about 10 g).
- a voltage is sequentially applied to each of the 15720 inspection electrodes on the inspection circuit board T1, and the electrical resistance between the inspection electrode to which the voltage is applied and the other inspection electrodes is measured by the sheet-like probe.
- Insulation resistance the electrical resistance of the electrode structure
- insulation failure ratio the ratio of measurement points at which the insulation resistance at all measurement points was 10 ⁇ or less
- the insulation resistance is 10 ⁇ or less, it is practically difficult to use it for the electrical inspection of the integrated circuit formed on the wafer.
- the test wafer W2 is placed on a test bench equipped with an electric heater, and a sheet-like probe is placed on the surface of the test wafer W2 with each of its surface electrode portions being a test wafer, Align and place it so that it is located on the electrode to be inspected for W2, and on this sheet-like probe, connect the anisotropic conductive connector to the back electrode part of the sheet-like probe. Aligned so that they are positioned.
- the inspection circuit board T1 was aligned and arranged so that each of the inspection electrodes was positioned on the conductive portion for connection of the anisotropic conductive connector.
- the circuit board for inspection The plate Tl was pressed downward with a load of 160 kg (the load applied per electrode structure was about 10 g on average).
- test electrodes on the test circuit board T1 between the sheet-like probe, the anisotropic conductive connector, and the two test electrodes electrically connected to each other via the test wafer W2. Electrical resistance 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)”.
- operation (2) This operation is referred to as “operation (2)”.
- operation (3) This operation is referred to as “operation (3)”.
- the conduction resistance is 1 ⁇ or more, it is practically difficult to use it for electrical inspection of the integrated circuit formed on the wafer.
- Example 1 a sheet-like probe, an anisotropic conductive connector, and an inspection circuit were similarly used except that the frame plate in the sheet-like probe had a size of each opening of 6.4 mm X O. 32 mm. Substrates were manufactured and Test 1 and Test 2 were performed.
- the surface direction of the elastic anisotropic conductive film of the anisotropic conductive connector is The outer dimensions (dimensions: 6. Omm X l. 2mm) are not acceptable for each of the openings in the frame plate in the above sheet-like probe.
- Example 1 a sheet-like probe, an anisotropic conductive connector, and a circuit board for inspection were manufactured and tested in the same manner except that a frame plate having a thickness of 50 / zm was used as the frame plate in the sheet-like probe. 1 and test 2 were performed.
- the gap d between the level of the back surface of the frame plate in the sheet-like probe and the level of the electrode surface of the back electrode portion is 40 ⁇ m
- the level of the surface of the frame plate in the anisotropic conductive connector is
- the gap h between the surface and the level of the end surface on the surface side of the connecting conductive portion of the anisotropic anisotropic conductive film is 35 m
- the ratio hZd is 0.88.
- Example 1 a sheet-like probe, an anisotropic conductive connector, and a circuit board for inspection were manufactured and tested in the same manner except that a frame plate having a thickness of 100 m was used as the frame plate in the sheet-like probe. 1 and test 2 were performed.
- the gap d between the level of the back surface of the frame plate in the sheet-like probe and the level of the electrode surface of the back electrode portion is 90 ⁇ m
- the level of the surface of the frame plate in the anisotropic conductive connector is
- the gap h from the level of the surface side end face of the connecting conductive portion of the elastic anisotropic conductive film is 35 / zm, and the ratio hZd is 0.4.
Abstract
Description
Claims
Priority Applications (3)
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KR1020077009615A KR101167750B1 (ko) | 2004-10-29 | 2005-10-27 | 웨이퍼 검사용 탐침 부재, 웨이퍼 검사용 프로브 카드 및웨이퍼 검사 장치 |
US11/718,065 US7656176B2 (en) | 2004-10-29 | 2005-10-27 | Probe member for wafer inspection, probe card for wafer inspection and wafer inspection equipment |
EP05799029A EP1806589A4 (en) | 2004-10-29 | 2005-10-27 | SONDER TO WAFER INSPECTION, WAFER INSPECTION SAMPLE CARD AND WAFER INSPECTION DEVICES |
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JP2004315522 | 2004-10-29 | ||
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US (1) | US7656176B2 (ja) |
EP (1) | EP1806589A4 (ja) |
KR (1) | KR101167750B1 (ja) |
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JP5314683B2 (ja) * | 2008-06-02 | 2013-10-16 | 株式会社アドバンテスト | プローブウエハ、プローブ装置および試験システム |
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JP5424675B2 (ja) * | 2008-03-18 | 2014-02-26 | キヤノン株式会社 | 半導体装置の製造方法及び半導体装置 |
KR101204941B1 (ko) * | 2012-04-27 | 2012-11-27 | 주식회사 아이에스시 | 전극지지부를 가지는 테스트용 소켓 및 그 테스트용 소켓의 제조방법 |
TWI491897B (zh) * | 2013-01-03 | 2015-07-11 | 矽品精密工業股份有限公司 | 半導體元件之測試裝置及測試方法 |
US10361105B2 (en) | 2014-12-03 | 2019-07-23 | Kla-Tencor Corporation | Determining critical parameters using a high-dimensional variable selection model |
JP6537905B2 (ja) * | 2015-06-30 | 2019-07-03 | 日本航空電子工業株式会社 | コネクタ |
KR20180049427A (ko) * | 2016-11-01 | 2018-05-11 | 솔브레인멤시스(주) | 다공성 도전부를 구비하는 이방 도전성 시트 및 그 제조 방법 |
JP7018368B2 (ja) * | 2018-07-12 | 2022-02-10 | 東京エレクトロン株式会社 | 検査装置及び検査装置の清浄化方法 |
KR102427089B1 (ko) * | 2020-05-27 | 2022-07-29 | 주식회사 아이에스시 | 전기접속용 커넥터 |
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2005
- 2005-10-27 US US11/718,065 patent/US7656176B2/en active Active
- 2005-10-27 EP EP05799029A patent/EP1806589A4/en not_active Withdrawn
- 2005-10-27 KR KR1020077009615A patent/KR101167750B1/ko active IP Right Grant
- 2005-10-27 WO PCT/JP2005/019799 patent/WO2006046650A1/ja not_active Application Discontinuation
- 2005-10-28 TW TW094137911A patent/TW200633313A/zh not_active IP Right Cessation
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KR100929244B1 (ko) * | 2007-05-28 | 2009-12-01 | 주식회사 코리아 인스트루먼트 | 프로브 시트, 이를 포함하는 프로브 카드 및 이의 제조방법 |
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Also Published As
Publication number | Publication date |
---|---|
TWI351136B (ja) | 2011-10-21 |
EP1806589A4 (en) | 2012-02-29 |
KR101167750B1 (ko) | 2012-07-23 |
KR20070072551A (ko) | 2007-07-04 |
US7656176B2 (en) | 2010-02-02 |
US20090140756A1 (en) | 2009-06-04 |
EP1806589A1 (en) | 2007-07-11 |
TW200633313A (en) | 2006-09-16 |
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