Source: https://patents.google.com/patent/KR20070005605A/en
Timestamp: 2020-08-10 00:30:58
Document Index: 556327348

Matched Legal Cases: ['art 12', 'art 11', 'art 12', 'art 11', 'art 11', 'art 12', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 12']

KR20070005605A - Probe and probe manufacturing method - Google Patents
Probe and probe manufacturing method Download PDF
KR20070005605A
KR20070005605A KR1020067017410A KR20067017410A KR20070005605A KR 20070005605 A KR20070005605 A KR 20070005605A KR 1020067017410 A KR1020067017410 A KR 1020067017410A KR 20067017410 A KR20067017410 A KR 20067017410A KR 20070005605 A KR20070005605 A KR 20070005605A
KR1020067017410A
KR100835245B1 (en
가츠야 오쿠무라
도시히로 요네자와
가부시끼가이샤 오크테크
2004-03-05 Priority to JPJP-P-2004-00063228 priority Critical
2004-03-05 Priority to JP2004063228A priority patent/JP4723195B2/en
2005-03-03 Application filed by 가부시끼가이샤 오크테크, 동경 엘렉트론 주식회사 filed Critical 가부시끼가이샤 오크테크
2007-01-10 Publication of KR20070005605A publication Critical patent/KR20070005605A/en
2008-06-05 Publication of KR100835245B1 publication Critical patent/KR100835245B1/en
239000010408 films Substances 0.000 abstract description 24
239000002245 particles Substances 0.000 description 22
Since microminiaturization of a wiring structure and film thinning have been rapidly progressed due to speed increase, the wiring layer has become extremely thin. Therefore, when an inspection is performed by applying a contact load on a probe as in the conventional cases, the probe penetrates not only an oxide film but also the wiring layer, and the wiring layer and an insulating layer are damaged due to concentrated stress from the probe. On the contrary, when the contact load is reduced, electrical continuity between the probe and an electrode pad becomes unstable. A probe is provided to surely and stably inspect an inspecting object by penetrating an oxide film with a low needle pressure. At the time of performing electrical characteristic inspection on the inspecting object, the probe is electrically brought into contact with the inspecting object. The probe is provided with a probe main body whereupon a contact part for contacting the inspecting object is formed, and a plurality of conductive materials having leading edge parts protruding from the contact part of the probe main body. ® KIPO & WIPO 2007
PROBE AND PROBE MANUFACTURING METHOD
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a probe used for inspecting electrical characteristics of an inspection object such as a wafer, and more particularly, to a probe capable of reducing the settling pressure during inspection.
In the case of inspecting the electrical characteristics of an inspection object such as a wafer, an inspection apparatus such as a probe device is used, for example. The inspection apparatus includes a probe card in electrical contact with the object under test, and a plurality of probes attached to the probe card are in electrical contact with electrode pads of the IC chip formed on the object under test so as to inspect the electrical characteristics of the IC chip. .
However, since the electrode pad is made of a conductive metal such as aluminum, for example, electrical contact cannot be achieved because the oxide film formed on the surface of the electrode pad forms an insulator only by bringing the probe into contact with the electrode pad. Thus, a predetermined contact load (settling pressure) is applied to the probe to scribe the probe on the electrode pad to cut the oxide film, or to pierce the oxide film at the tip of the probe, thereby to establish electrical conduction between the probe and the electrode pad. Getting drunk.
For example, Patent Document 1 proposes a probe that penetrates an oxide film of an electrode pad. In the probe, the tip of the probe is formed of a plurality of protrusions, and the protrusions increase the contact area with the electrode pads, and further, an oxide film is drilled through the protrusions to make electrical contact between the probes and the electrode pads. As the projections, lattice-shaped projections having a triangular cross-sectional shape with sharp acute edges, fusiform protrusions having a triangular cross-sectional shape with sharp acute edges and the like have been proposed.
In addition, Patent Document 2 proposes a method of manufacturing a probe card in which irregularities are formed on the tip end surface of a bump connected as an inspection electrode of a semiconductor chip. Furthermore, Patent Document 3 also proposes a contactor and a method of forming a contactor similar to Patent Document 2. The bumps proposed in these patent documents are also a technique in which the oxide film of the electrode pad is drilled by the unevenness of the bump tip end surface in the same manner as in the case of Patent Document 1.
Patent Document 1: Japanese Patent Application Laid-Open No. 11-051970
Patent Document 2: Japanese Patent Application Laid-Open No. 08-306749
Patent Document 3: Japanese Patent Application Laid-Open No. 10-132854
However, in recent years, as the integrated circuits become more functional and faster, the wiring structure becomes thinner and thinner, and the wiring layer becomes very thin. Therefore, when the probe is subjected to the pressure described in the conventional patent document 1 and subjected to inspection, the probe becomes an oxide film. In addition, there is a fear that the wiring layer penetrates and the wiring layer and the insulating layer are damaged by the concentrated stress from the probe. On the contrary, when the settling pressure is lowered, there is a fear that the conduction between the probe and the electrode pad becomes unstable. The bumps described in Patent Documents 2 and 3 can reliably break the oxide film of the electrode pad due to the unevenness, but there is a risk of damaging the wiring layer and the insulating layer depending on the settling pressure as in the case of Patent Document 1.
SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a probe and a method of manufacturing the same, which can reliably and stably inspect an inspected object by penetrating an oxide film at low sedimentation pressure.
The present invention provides a probe which is in electrical contact with the subject under test when the electrical characteristic of the subject is inspected, the probe body having a contact portion formed with a contact portion with the subject and a plurality of tip portions protruding from the contact portion of the probe body. It is characterized by including a conductive material.
The contact portion may include a contact surface with the test subject.
The conductive material may be embedded in the contact portion and be made of a harder material than the contact portion.
The conductive material may be made of conductive diamond or nanoscale metal.
According to another aspect of the present invention, there is provided a method of manufacturing a probe in electrical contact with an inspected object when an electrical property inspection of an inspected object is carried out, the step of forming a mold of a contact portion with the inspected object on a substrate; Injecting a plurality of conductive materials having a tip portion into the mold, filling the mold with a conductive metal to form the contact portion, forming a probe body including the contact portion, and separating the mold from the mold. And a step of protruding the tip portion of the conductive material from the contact portion.
According to the present invention, it is possible to provide a probe capable of reliably and stably inspecting an object under inspection by penetrating an oxide film at low sedimentation pressure and a method of manufacturing the same.
1 (a) and (b) show one embodiment of the probe of the present invention, (a) is a sectional view showing a probe card to which the probe is applied, and (b) shows a main part of the probe. Cross-section.
FIG. 2 is a cross-sectional view showing a state in which the probe and electrode pad shown in FIG. 1 are in electrical contact with each other. FIG.
(A)-(e) is sectional drawing which shows the principal part of the manufacturing process of the probe shown in FIG.
11: probe body
11A: Contact
11B: contact surface
12: conductive particles
12A: Advanced Section
EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated based on each embodiment shown in FIGS. 1A and 1B show an embodiment of a probe of the present invention, (a) is a cross-sectional view showing a probe card to which a probe is applied, and (b) is a main part of the probe. 2 is a cross-sectional view showing a state in which the probe and the electrode pad shown in FIG. 1 are in electrical contact, and FIGS. 3A to 3E are principal parts of the manufacturing process of the probe shown in FIG. It is sectional drawing.
The probe 10 of the present embodiment is used by being attached to the probe card 20, for example, as shown in Fig. 1A. As shown in FIG. 1A, the probe card 20 includes, for example, a contactor 21 formed of a ceramic substrate and a printed wiring board 22 electrically connected to the contactor 21. The probe 10 of the probe card 20 is moved by the horizontal direction and the vertical direction of the mounting table 30 to face the inspection object (wafer) on the mounting table 30 disposed in the main body of the probe device. A part of a plurality of IC chips (not shown) formed in Fig. 1) or a plurality of IC chips are collectively contacted with each other so as to inspect the electrical characteristics of each IC chip.
As shown in Fig. 1A, a plurality of recesses 21A corresponding to the electrode pads P of the integrated circuit are formed in a predetermined pattern on the lower surface of the contactor 21, and these recesses 21A ), The probe 10 of this embodiment is attached to the lower surface of the contactor 21. In the contactor 21, a wiring layer is formed in multiple layers, and the probe 10 and the printed wiring board 22 are electrically connected through these wiring layers.
The probe 10 is, for example, as shown in Figs. 1A and 1B, between a probe body 11 formed in an elongated shape and the test object formed at the tip of the probe body 11. A plurality of conductive materials (conductive particles) 12 having a contact portion 11A and a tip portion 12A protruding from the contact portion 11A, wherein the contact portion 11A is connected to the contactor 21 through the probe main body 11. Is flexibly moved in and out of the recess 21A. The tip 12A of the electroconductive particle 12 is formed in the tip part which has a sharp tip as shown to FIG. 1 (b). So, below, the front-end | tip part 12A is demonstrated as 12 A of tip parts.
The probe body 11 is formed of a conductive metal such as nickel having toughness and elasticity. In addition, although the contact part 11A is formed with the same conductive metal as the probe main body 11 in this embodiment, it may be formed with the other conductive metal. The conductive particles 12 are formed of a harder material or a material having better chemical resistance than the contact portions 11A, such as conductive diamond, carbon nanotubes, or nanoscale metal, and are embedded in the contact portions 11A. The electrode pad P of the IC chip of the wafer W is made of a conductive metal such as aluminum or copper, for example. 1B, reference numeral I is a protective film.
As shown in Fig. 1B, the contact portion 11A is formed such that the contact surface 11B in contact with the electrode pad P is substantially parallel to the upper surface of the electrode pad P, as described later. The tip portions 12A of the plurality of conductive particles 12 protrude by a predetermined dimension from the contact surface 11B of the contact portion 11A, penetrate the oxide film O of the electrode pad P at the time of inspection, and form the electrode pad P. And electrical contact between the probe 10 and the IC chip. In addition, when the tip portion 12A of the conductive particles 12 of the probe 10 is inserted into the electrode pad P, the contact surface 11B comes into contact with the electrode pad P to function as a stopper, and the tip portion 12A. ) Is not inserted beyond a predetermined depth.
In this embodiment, the contact surface 11B of the probe main body 11 is formed in substantially circular shape, for example, is formed in the magnitude | size of about 30 micrometers, and the tip part 12A of the electroconductive particle 12 is the contact surface 11B. Protrude from about 0.3 μ. On the other hand, in the electrode pad P, for example, an aluminum metal layer is formed to a thickness of about 1 mu, and an oxide film O of about 0.1 mu is formed on the surface thereof.
In the case where the electrical properties of the wafer W are inspected using the probe 10 of the present embodiment, the wafer W is placed on the mounting table 30 as shown in FIG. The table 30 moves in the horizontal direction and reaches immediately below the inspection position of the wafer W as shown in Fig. 1B. Subsequently, the mounting table 30 is raised to contact the tip 12A of the conductive particles 12 of the probe 10 with the electrode pad P in the wafer W, and then the mounting table 30 is overwritten. Drive to impart a pressure of, for example, 1 gf / piece between the probe 10 and the electrode pad P. FIG.
Due to the overdrive of the mounting table 30, as shown in FIG. 2, the tip 10A of the conductive particles 12 protruding from the contact portion 11A is formed by the oxide film of the electrode pad P. Through O), the probe 10 penetrated into the electrode pad P and the electrode pad P are electrically connected. When the tip portion 12A of the conductive particles 12 reaches a predetermined depth in the electrode pad P, the contact portion 11A is in surface contact with the electrode pad P by the contact surface 11B, and the contact portion 11A is no longer provided. ) Does not penetrate into the electrode pad P. Therefore, since the electrode pad P is thinned, the contact surface 11B of the contact portion 11A functions as a stopper, so that the electrical characteristics of the IC chip can be inspected without damaging the electrode pad P by the probe 10. Can be performed reliably and stably.
In addition, the probe 10 of this embodiment can be formed by the microfabrication technique, such as a microelectronic mechanical system (MEMS) process using photolithography technique. Then, the manufacturing method of the probe of this invention is demonstrated, referring FIG.3 (a)-(e). In the manufacturing method of this invention, a conventionally well-known fine processing technique can be used other than embedding the electroconductive particle 12 in the contact part 11A of the probe 10.
In manufacturing a probe, first, a resist is applied to the surface of a silicon substrate to form a resist film, the resist film is exposed through a photo mask, and then developed to form a mold of the contact portion 11A of the probe body 11 on the resist film. Form openings in the area to be made. Thereafter, as shown in Fig. 3A, the silicon substrate 100 is etched using the resist film as a mask to form a mold 101 for forming the contact portion 11A, and then the resist film is removed. . At this time, the mold 101 is formed in a plurality of places on the silicon substrate 100 in accordance with the arrangement pattern of the probe 10 of the contactor 21.
Subsequently, after sputtering is performed on the surface of the silicon substrate to form a metal thin film, as shown in FIG. 3B, a plurality of conductive particles 12 are formed in the mold 101 of the silicon substrate 100. Input. In this state, as shown in FIG. 3C, the silicon substrate 100 is plated, and a metal such as nickel is filled in the mold 101 to form the contact portion 11A of the probe main body 11. . At this time, as shown in Fig. 3C, the probe main body 11 can be formed together with the contact portion 11A. In addition, after forming the contact part 11A as needed, you may form the probe main body 11 from the same material or a different material from 11 A of contact parts.
Thereafter, as shown in Fig. 3D, the probe main body 11 and the contact portion 11A are peeled off from the silicon substrate 100 as a probe. In this state, since the conductive particles 12 are buried in the contact portion 11A, as shown in FIG. 3E, the contact portion 11A is immersed in the etching solution to remove the lower end portion of the contact portion 11A, thereby removing the conductive particles. The tip portion 12A of (12) is protruded and at the same time a contact surface is formed. The protruding dimension of the tip portion 12A is set to a depth (for example, about 0.3 mu) of penetrating the oxide film of the electrode pad. After the tip portion 12A is formed in the contact portion 11A, the probe is transferred to a predetermined position on the ceramic substrate and completed as the contactor 21. In order to protrude 12 A of tip parts of electroconductive particle 12 from 11 A of contact parts, you may cut the lower part of 11 A of contact parts.
As explained above, according to the probe 10 of this embodiment, the some electroconductive particle 12 which has the probe main body 11 and the tip part 12A which protrudes from the contact part 11A of this probe main body 11 is carried out. Therefore, when a predetermined settling pressure is applied to the probe 10, the tip 12A of the plurality of conductive particles 12 penetrates the oxide film O of the electrode pad P at a plurality of locations, and the probe 10 and the electrode The pads P can be electrically connected reliably, and the IC chip of the wafer W can be reliably and stably inspected. At this time, since the contact surface 11B is formed in the contact portion 11A, the contact surface 11B functions as a stopper and there is no fear of damaging the electrode pad P with the tip portion 12A of the conductive particles 12. In addition, since the conductive particles 12 are formed of conductive diamond harder than the probe main body 11 and the electrode pad P, wear of the probe 10 can be reduced.
In addition, when manufacturing the probe 10, since the electroconductive particle 12 is formed by the material harder than the contact part 11A or the chemical-resistance material, only the lower end part of the contact part 11A is melt | dissolved by using etching liquid. The tip 12A of the electroconductive particle 12 can be easily projected from the contact part 11A, and only the lower part of the contact part 11A is cut | disconnected irrespective of etching liquid, and the tip part 12A of the electroconductive particle 12 is cut out. It can simply protrude from the contact portion 11A.
In addition, this invention is not restrict | limited at all to the said embodiment. For example, in the above embodiment, the cantilever type probe has been described, but the probe of the present invention may have a form such as a vertical probe or a probe of a type that is bent in a zigzag shape and has elasticity. In the case where carbon nanotubes are used as the conductive material, the carbon nanotubes may be grown on the contact portions of the probes, and then, part of the contact portions may be removed to protrude the carbon nanotubes. That is, the probe of this invention is included in this invention as long as it is a probe which provided the electroconductive material in the contact part with the to-be-tested object of a probe main body, and protruded the front end part of the electroconductive material from a contact part.
The present invention can be suitably used, for example, as a probe of an inspection apparatus.
A probe that is in electrical contact with the subject under test when the electrical characteristic of the subject is inspected,
And a plurality of conductive materials each having a probe main body in which a contact portion with the test object is formed, and a tip portion protruding from the contact portion of the probe main body.
The probe according to claim 1, wherein the contact portion has a contact surface with the object under test.
The probe of claim 1, wherein the conductive material is embedded in the contact portion and is made of a material harder than the contact portion.
The probe of claim 1 wherein said conductive material is comprised of conductive diamond or nanoscale metal.
As a method of manufacturing a probe in electrical contact with the subject under examination of the electrical characteristics of the subject under test,
Forming a mold of a contact portion with the test object on a substrate, injecting a plurality of conductive materials having a tip portion into the mold, filling a conductive metal in the mold to form the contact portion, and the contact portion Forming a probe body including a; and protruding a tip portion of the conductive material from the contact portion separated from the mold;
Probe manufacturing method comprising a.
KR1020067017410A 2004-03-05 2005-03-03 Probe and probe manufacturing method KR100835245B1 (en)
JPJP-P-2004-00063228 2004-03-05
JP2004063228A JP4723195B2 (en) 2004-03-05 2004-03-05 Probe manufacturing method
KR20070005605A true KR20070005605A (en) 2007-01-10
KR100835245B1 KR100835245B1 (en) 2008-06-05
ID=34918148
KR1020067017410A KR100835245B1 (en) 2004-03-05 2005-03-03 Probe and probe manufacturing method
US (1) US7649369B2 (en)
EP (1) EP1724594A1 (en)
JP (1) JP4723195B2 (en)
KR (1) KR100835245B1 (en)
CN (1) CN100442058C (en)
TW (1) TWI379080B (en)
WO (1) WO2005085877A1 (en)
KR100799166B1 (en) * 2007-07-02 2008-01-29 이재하 Manufacturing method of probe assembly
JP4676224B2 (en) * 2005-03-23 2011-04-27 国立大学法人信州大学 Probe needle and manufacturing method thereof
JP4855757B2 (en) * 2005-10-19 2012-01-18 富士通株式会社 Carbon nanotube pad and electronic device
JP2008039639A (en) * 2006-08-08 2008-02-21 Hioki Ee Corp Measurement probe of contact type
TWI338141B (en) * 2006-09-26 2011-03-01 Nihon Micronics Kk
CN101526555B (en) * 2008-03-04 2011-12-07 跃沄科技有限公司 Method for manufacturing probe
KR101206226B1 (en) * 2008-07-18 2012-11-29 도쿄엘렉트론가부시키가이샤 Probe
JP5325085B2 (en) * 2009-12-24 2013-10-23 日本碍子株式会社 Connection device
WO2012002763A2 (en) 2010-07-02 2012-01-05 Jae Hak Lee Test probe for test and fabrication method thereof
KR101047550B1 (en) 2010-07-02 2011-07-07 주식회사 아이에스시테크놀러지 Conductive connector with probe and the fabrication method thereof
CN102610941A (en) * 2011-01-19 2012-07-25 富士康(昆山)电脑接插件有限公司 Testing connector
CN103091617B (en) * 2013-01-29 2017-08-15 无锡华润上华科技有限公司 A kind of semiconductor test method
JP5936579B2 (en) * 2013-05-08 2016-06-22 本田技研工業株式会社 Current application device
EP2894483B1 (en) 2014-01-09 2018-06-27 Multitest elektronische Systeme GmbH Contact tip and contact element and method of producing the same
TWI564569B (en) * 2015-09-21 2017-01-01 旺矽科技股份有限公司 Probe structure and manufacturing method thereof
CN106443188A (en) * 2016-11-09 2017-02-22 武汉新芯集成电路制造有限公司 Resistance measuring probe
KR101976702B1 (en) * 2017-08-31 2019-05-09 주식회사 아이에스시 Test socket with carbon nanotube
CN108279368A (en) * 2018-01-23 2018-07-13 德淮半导体有限公司 Tester table and test method
JP3460094B2 (en) * 1994-02-21 2003-10-27 株式会社エンプラス Method of forming electrode part of IC package inspection socket
JP2796070B2 (en) 1995-04-28 1998-09-10 松下電器産業株式会社 Method of manufacturing probe card
JPH0968546A (en) * 1995-08-31 1997-03-11 Nitto Denko Corp Test head structure and manufacture thereof
JPH09196969A (en) * 1996-01-23 1997-07-31 Nitto Denko Corp Probe structure
JP2944537B2 (en) * 1996-10-14 1999-09-06 山一電機株式会社 Flexible wiring board for contacting electronic components
JPH10132854A (en) 1996-10-29 1998-05-22 Matsushita Electron Corp Contactor and forming method for contactor
JPH10221370A (en) * 1997-01-31 1998-08-21 Mitsubishi Materials Corp Contact probe and its manufacture, and probe apparatus having contact probe
JPH1151970A (en) 1997-07-31 1999-02-26 Nec Corp Probe card
WO1999015908A1 (en) * 1997-09-19 1999-04-01 Hitachi, Ltd. Method for manufacturing semiconductor integrated circuit device
JP4361161B2 (en) * 1999-04-06 2009-11-11 日東電工株式会社 Anisotropic conductive connector
JP2002131334A (en) * 2000-10-24 2002-05-09 Nec Yamaguchi Ltd Probe needle, probe card, and manufacturing method of probe card
JP3771907B2 (en) 2002-05-27 2006-05-10 山一電機株式会社 Electrode recovery processing method
KR100373762B1 (en) * 2002-09-25 2003-02-26 Uk Ki Lee Method for manufacturing cavity-type micro-probe using mems technology and micro-probe according to the same
2004-03-05 JP JP2004063228A patent/JP4723195B2/en not_active Expired - Fee Related
2005-03-03 CN CNB2005800071701A patent/CN100442058C/en not_active IP Right Cessation
2005-03-03 WO PCT/JP2005/003609 patent/WO2005085877A1/en not_active Application Discontinuation
2005-03-03 EP EP20050719913 patent/EP1724594A1/en not_active Withdrawn
2005-03-03 KR KR1020067017410A patent/KR100835245B1/en not_active IP Right Cessation
2005-03-03 US US10/591,645 patent/US7649369B2/en not_active Expired - Fee Related
2005-03-04 TW TW94106626A patent/TWI379080B/zh not_active IP Right Cessation
JP2005249693A (en) 2005-09-15
JP4723195B2 (en) 2011-07-13
TW200540425A (en) 2005-12-16
TWI379080B (en) 2012-12-11
US20080036479A1 (en) 2008-02-14
CN100442058C (en) 2008-12-10
WO2005085877A1 (en) 2005-09-15
US7649369B2 (en) 2010-01-19
EP1724594A1 (en) 2006-11-22
KR100835245B1 (en) 2008-06-05
CN1930482A (en) 2007-03-14
KR101250167B1 (en) 2013-04-05 Fabrication method of semiconductor integrated circuit device
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JP3757971B2 (en) 2006-03-22 Manufacturing method of semiconductor device
EP1788401B1 (en) 2008-11-05 Method and apparatus for testing electrical characteristics of object under test
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US7488899B2 (en) 2009-02-10 Compliant contact pin assembly and card system
KR100580008B1 (en) 2006-05-12 Contactor, method for manufacturing the same, and probe card using the same
US7488917B2 (en) 2009-02-10 Electric discharge machining of a probe array
US6784556B2 (en) 2004-08-31 Design of interconnection pads with separated probing and wire bonding regions
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