JP3651405B2 - Probe and manufacturing method thereof - Google Patents

Probe and manufacturing method thereof Download PDF

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Publication number
JP3651405B2
JP3651405B2 JP2001092649A JP2001092649A JP3651405B2 JP 3651405 B2 JP3651405 B2 JP 3651405B2 JP 2001092649 A JP2001092649 A JP 2001092649A JP 2001092649 A JP2001092649 A JP 2001092649A JP 3651405 B2 JP3651405 B2 JP 3651405B2
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Japan
Prior art keywords
contact
substrate
needle
probe
contact needle
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JP2002286759A (en
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敦夫 服部
忍 川瀬
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Yamaha Corp
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Yamaha Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、集積回路装置その他の電気部品の導通検査などに用いられる接触針が片持ち梁形式で突出した構造のプローブおよびその製造方法に関し、詳しくは、その接触針の破損、変形を防止可能な上記プローブおよびその製造方法に関する。
【0002】
【従来の技術】
この種のプローブとしては、特開平8−15318号公報、特開平6−213929号公報や特開平6−249879号公報等に開示されたものが知られている。これらはいずれも、接触針が基板の端部から突出しただけの形状のものである。
【0003】
【発明が解決しようとする課題】
しかし、この種のプローブでは検査作業時の操作ミスや、被検査物の変形、例えばそりなどがあって、接触針を過度に被検査物に押し当てると、図13、図14に示すように、接触針が過大度にたわんで、弾性限界応力を越えた力がかかると接触針が塑性変形してしまうし、破断応力以上の力がかかると接触針は折損してしまう。
よって、本発明の課題は、接触針に、万一、過度の変形が加えられるような力がかかっても、接触針が折損したり、塑性変形したりしないような片持ち梁形式のプローブおよびその製造方法を提供することにある。
【0004】
【課題を解決するための手段】
すなわち、本発明の要旨は、セラミックまたはガラスからなる基板から多数の接触針が片持ち梁形式で突出した構造のプローブであって、接触針の過大なたわみを防止する保護板が、接触針を支持している基板上に、接触針から離間して設けられ、該接触針は、個々に独立した針状のものであって、個々の針全体が金属から構成されているプローブにあり、さらに基板上に凹部を形成し、この凹部に犠牲層を充填し、この基板上に、前記犠牲層上から基板上に延びる多数の接触針を形成し、次いで、犠牲層を除去し、不要部を除去するプローブの製造方法にある。
【0005】
【発明の実施の形態】
以下、本発明を詳しく説明する。
図1ないし図3は本発明のプローブの第1の例を示す図である。
図1に示すように、基板1の表面上に多数の接触針2が互いに並列に配設され、接触針2の一端が基板1から片持ち梁形式で突出した構造となっている。接触針2は、個々に独立した針状のものであって、個々の針全体が金属から構成されている。
図2に示すように、基板1の裏面側には保護板3が接触針2と平行に設けられており、保護板3は、接触針2と、Dの間隔を保って離間し、保護板3の先端は接触針2の先端より先まで出ている。
保護板3を別途基板1の裏面に張り付けて上記の構造にしてもよいが、図2では基板1の裏面が延長して保護板3を形成している例を示す。
基板1としては、ガラス板またはセラミック板が用いられる。
保護板3を基板1とは別個に設ける場合は保護板としても上記のような板のいずれをも用いることができる。
このようなプローブの接触針2を被検査物4に押し当てた状態を図3に示す。プローブが上記のような構造であれば、接触針2が万一過大な力で被検査物4に押し当てられて、たわんでも、接触針2が保護板3にあたった後は保護板3で支えられ、接触針2はそれ以上曲がることはない。
【0006】
図4には、本発明の他の例を示す。この例では保護板3の基板1に近い部分の中央部に窓5を開けて、プローブを押し当てたときの状況を観察できるようになっている。
図5には、保護板3の先端に突起を設け、接触針が被検査物に押し当てられる前、あるいは過度にたわむ前に保護板先端の突起が被検査物に接触するようにした例である。
図6には、保護板3の接触針側の面に接触針2がたわんで保護板3にあたるときに接触針2が形成する形状に沿った窪み6が形成され、接触針2が1点ではなく、面で保護板3に接触するようにした例が示されている。
図7には、接触針2の長さが保護板3の長さよりも長く、接触針の先端が保護板先端より先に出ている例が示されている。
【0007】
上記いずれの例でも、接触針2がたわんで保護板3に接触した時点での針の変形歪みが針の材料の破断限界応力時の歪み以下であり、かつ、弾性限界応力時の歪み以下であるようにすれば、万一、接触針2に過大な力がかかったときでも従来例のように折損したり塑性変形したりすることはない。これは、保護板3と接触針2の離間距離Dを適切に設定することにより達成できる。
破断応力と降伏応力(弾性変形限界応力)とを比較すると、通常、降伏応力≦破断応力なので、接触針が折損も塑性変形もしないという条件での最大変位は、降伏応力がかかったときの変位に相当することになる。
従って、片持ち梁の最大変位をH、梁の長さをL、梁のヤング率をE、厚みをt、降伏応力をσとしたとき、梁が許される最大変位(許容最大変位)は
H=(2/3)・σ・L2/(Et)
で表される。
梁のヤング率、降伏応力は素材により異なるので、接触針を構成する素材、接触針の形状に合わせて上記のHを求め、接触針と保護板の離間距離DをそのH以下になるように設定すればよい。
【0008】
ちなみに、いくつかの接触針における上記Dの許容範囲の例を示す。

Figure 0003651405
【0009】
また、本発明のプローブとしては、図8、図9に示すように、少なくとも保護板の接触針側の表面に電極7を配し、接触針が保護板に接触したときにはこの電極に接触して回路が形成され、その回路上に導通検出装置を設けて接触針2と保護板3の接触を検出可能としたプローブであってもよい。
図8の状態では回路を形成せず、図9のように、接触針2がたわんで保護板上の電極7に接触したときに回路が形成される。
この導通検出装置は、接触針2と保護板上の電極7が接触したときにのみ回路が形成され、その回路が形成したことを判別できるものであればどのようなものも用いることができ、例えば、電圧計や電流計を用いることができる。
保護板に設けた電極からの信号の取り出しは電極の接触針側の面からでもよく、側部からであってもよい。また電極を設けた部分の保護板に貫通孔を設け、その貫通孔に金属などを充填することにより導通孔とし、その導通孔を経由して保護板裏面から取り出してもよい。
【0010】
電極7は接触針2がたわんで保護板3に接触する部分にあればよいが、保護板3の接触針側全面にあってもよい。また、図10(a)に示すように、接触針側の保護板3および基板1の双方の全面に設けられていてもよい。また、保護板3自体が導電性のものであってもよく、保護板3と基板1が一体化されていて、それが導電性のものであってもよい。基板まで電極が設けられている場合や、基板が導電性のものである場合は、この電極あるいは導電性基板と接触針の間に絶縁層9を設けて、この部分では導通しないようにする。
なお、図10(a)の例では、基板と保護板との間が斜面となっている例であり、このような形状は、電極を設けた場合のみに限られず、本発明のいずれのプローブの場合にもこの形状を採用することができる。
また、図10(b)、(c)に示すように、保護板が基板側から保護板先端に向けて厚みが薄くなって斜面を形成して、その分、接触針から離れる形状になっていてもよい。その斜面のスタートが、(b)のように接触針と接触する位置から始まっていてもよく、(c)のように基板厚み方向中間から始まっていてもよい。
【0011】
本発明のプローブは保護板を設けているため、接触針が過度にたわむことがなく、従って、折損や塑性変形する心配もない。とくに、保護板の先端が接触針の先端より先に出ているものは、接触針を確実に保護できる効果もある。接触針の先端が保護板先端より出ているものは、接触針の変位を大きくとることが可能となる。また、保護板に電極を設けたものは接触針の保護板への接触を電気的に検知できるので、それ以上強く被検査物に接触針を抑える必要がないことがわかり、接触針や被検査物を傷めることが少なくなるという特徴を有する。
【0012】
次に、本発明のプローブの製造方法につき説明する。基板1の一方の端を所定の深さ、幅で切り欠き、凹部10を形成する。この凹部は、基板の途中から始まり、基板の端まで凹部が続いた状態の形状とし、図1〜図10に見られるように種々の形状をとりうるものである。この凹部10の深さは前記のD、すなわち接触針として形成される梁の素材及び形状に応じた許容最大変位Hより小さい値とする。保護板の接触針側の面に電極を設ける場合は、切り欠き幅から電極の厚さを引いた値がDであればよい。この切り欠きは、基板の材質に応じて、レーザー加工、サンドブラスト、切削加工や、エッチング、ミリングなどを適宜採用すればよい。
【0013】
次いでこうして設けた凹部10に下記に示すような材料を充填して犠牲層11を形成する。犠牲層11に基板表面よりくぼんだ部分が存在しないように犠牲層11が基板1より盛り上がり気味になるように犠牲層11を形成する。充填後の状態を図11に示す。
犠牲層11を形成する材料としては銅、クロムなどの金属、アルミナ、あるいは鉛、錫、インジウム等の低融点金属、ポリエステル樹脂などの溶剤可溶性あるいは分解性樹脂などを用いることができる。
次いで犠牲層を設けた表面全体を研磨して、表面全体が平坦になるようにし、かつ、犠牲層11が凹部10にのみ残り、その他の部分は基板1が露出しているようにする。
【0014】
次いで、この犠牲層11と基板1からなる表面全面に金属をスパッタして、メッキ下地層12を形成する。メッキ下地層を形成する金属としては、クロム、銅、ニッケル等の金属、これら同士の合金、あるいはこれらとコバルト、鉄、タングステンなどの金属との合金等を例示できる。
このメッキ層の上に、形成される多数の接触針が互いに並列になるように配設され、かつ、それぞれの接触針が基板1と犠牲層にまたがって延在するようなパターンを形成するよう、レジストを用いて不要部分を覆い、接触針を形成する金属を電気メッキする。この金属としてはNi、Ni−W、Ni−Fe等の金属であり、メッキ下地層に親和性を有し、接触針として適した硬度、剛性、弾性を有するものが用いられる。メッキの厚みとしては10〜80μm程度とすることが好ましい。
【0015】
次いでレジストを溶解あるいはアッシングして除去し、露出しているメッキ下地層を例えばミリングにより除去する。こうして基板1と犠牲層11にまたがって延在している接触針2を有し、裏面側の基板が延長して保護板3を形成している基板が得られる。この状態を図12に示す。
この不要部分(図12における破線部分)及び犠牲層11を除去することにより本発明のプローブを得ることができる。
不要部分の除去は、レーザー加工、切断、研磨、エッチングなどを採用することができる。
犠牲層の除去は、銅やクロムなどの金属の場合はエッチング、低融点金属の場合は溶融除去、有機物の場合は溶解や加水分解、アッシング等で除去することができる。
【0016】
【発明の効果】
本発明のプローブは保護板を設けているため、接触針が過度にたわむことがなく、従って、接触針が折損や塑性変形する心配もない。また、保護板に電極を設けたものは接触針の保護板への接触を電気的に検知できるので、それ以上強く被検査物に接触針を抑える必要がないことがわかり、接触針や被検査物を傷めることが少なくなるという特徴を有する。
本発明のプローブの製造方法によれば、容易に本発明のプローブを得ることができる。
【図面の簡単な説明】
【図1】 本発明のプローブの一例を示す斜視図である。
【図2】 本発明のプローブの一例を示す断面図である。
【図3】 プローブを被検査物に押しつけた状態を示す断面図である。
【図4】 本発明のプローブの他の例を示す断面図である。
【図5】 本発明のプローブの他の例を示す断面図である。
【図6】 本発明のプローブの他の例を示す断面図である。
【図7】 本発明のプローブの他の例を示す断面図である。
【図8】 本発明のプローブの他の例を示す断面図である。
【図9】 プローブを被検査物に押しつけた状態を示す断面図である。
【図10】(a)、(b)、(c)のいずれも本発明のプローブの他の例を示す断面図である。
【図11】 凹部に犠牲層を形成する材料を充填した状態を示す断面図である。
【図12】 基板上から犠牲層上にかけて接触針を形成した状態を示す図である。
【図13】 接触針が片持ち梁形式で突出した構造のプローブの従来例を示す断面図である。
【図14】 接触針が片持ち梁形式で突出した構造のプローブの従来例を示す断面図であり、破断応力以上の力がかかって、接触針が折損した状態を示す。
【符号の説明】
1:基板、 2:接触針、 3:保護板、 4:被検査物、 5:窓、
6:窪み、 7:電極、 9:絶縁層、 10:凹部、11:犠牲層、
12:メッキ下地層、 13:保護板先端[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a probe having a structure in which a contact needle used for continuity inspection of an integrated circuit device and other electrical components protrudes in a cantilever manner and a method for manufacturing the probe. Specifically, the contact needle can be prevented from being damaged or deformed. The present invention relates to a probe and a method for manufacturing the probe.
[0002]
[Prior art]
As this type of probe, those disclosed in JP-A-8-15318, JP-A-6-213929, JP-A-6-249879, and the like are known. Each of these has a shape in which the contact needle protrudes from the end of the substrate.
[0003]
[Problems to be solved by the invention]
However, with this type of probe, there are operational errors during inspection work and deformation of the inspection object, for example, warpage, etc. If the contact needle is excessively pressed against the inspection object, as shown in FIGS. If the contact needle bends excessively and a force exceeding the elastic limit stress is applied, the contact needle is plastically deformed, and if a force greater than the breaking stress is applied, the contact needle is broken.
Therefore, an object of the present invention is to provide a cantilever type probe that does not break or plastically deform the contact needle even if excessive force is applied to the contact needle. It is in providing the manufacturing method.
[0004]
[Means for Solving the Problems]
That is, the gist of the present invention is a probe having a structure in which a large number of contact needles protrude from a ceramic or glass substrate in a cantilever form, and a protective plate for preventing excessive deflection of the contact needles Provided on a supporting substrate, spaced apart from the contact needles, the contact needles being in the form of individually independent needles, wherein each individual needle is entirely composed of metal , and A recess is formed on the substrate, the sacrificial layer is filled in the recess, and a large number of contact needles extending from the sacrificial layer to the substrate are formed on the substrate, and then the sacrificial layer is removed to remove unnecessary portions. in the manufacturing method of the probe to be removed.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
1 to 3 are views showing a first example of the probe of the present invention.
As shown in FIG. 1, a large number of contact needles 2 are arranged in parallel on the surface of the substrate 1, and one end of the contact needle 2 protrudes from the substrate 1 in a cantilever manner. The contact needles 2 are individually needle-shaped, and the entire individual needles are made of metal.
As shown in FIG. 2, a protective plate 3 is provided in parallel with the contact needle 2 on the back side of the substrate 1. The protective plate 3 is separated from the contact needle 2 with an interval of D, and the protective plate 3 The tip of 3 protrudes beyond the tip of the contact needle 2.
Although the protection plate 3 may be separately attached to the back surface of the substrate 1 to have the above-described structure, FIG. 2 shows an example in which the protection plate 3 is formed by extending the back surface of the substrate 1.
As the substrate 1, a glass plate or a ceramic plate is used.
When the protective plate 3 is provided separately from the substrate 1, any of the above-described plates can be used as the protective plate.
A state in which the contact needle 2 of such a probe is pressed against the inspection object 4 is shown in FIG. If the probe has the structure as described above, the contact needle 2 is pressed against the object 4 to be inspected with an excessive force, and even if it is bent, after the contact needle 2 hits the protection plate 3, the protection plate 3 Supported, the contact needle 2 will not bend any further.
[0006]
FIG. 4 shows another example of the present invention. In this example, a window 5 is opened at the central portion of the protective plate 3 near the substrate 1, and the situation when the probe is pressed can be observed.
FIG. 5 shows an example in which a protrusion is provided at the tip of the protection plate 3 so that the protrusion at the tip of the protection plate contacts the object to be inspected before the contact needle is pressed against the object to be inspected or excessively bent. is there.
In FIG. 6, a depression 6 is formed along the shape formed by the contact needle 2 when the contact needle 2 bends on the surface on the contact needle side of the protection plate 3 and hits the protection plate 3. There is shown an example in which the protective plate 3 is brought into contact with the surface.
FIG. 7 shows an example in which the length of the contact needle 2 is longer than the length of the protection plate 3 and the tip of the contact needle comes out ahead of the tip of the protection plate.
[0007]
In any of the above examples, the deformation strain of the needle when the contact needle 2 bends and contacts the protective plate 3 is less than or equal to the strain at the breaking limit stress of the needle material and less than or equal to the strain at the elastic limit stress. If so, even if an excessive force is applied to the contact needle 2, it will not break or plastically deform as in the conventional example. This can be achieved by appropriately setting the separation distance D between the protective plate 3 and the contact needle 2.
Comparing the breaking stress and the yield stress (elastic deformation limit stress), since the yield stress is usually equal to or less than the breaking stress, the maximum displacement under the condition that the contact needle does not break or plastically deform is the displacement when the yield stress is applied. It is equivalent to.
Therefore, when the maximum displacement of the cantilever beam is H, the length of the beam is L, the Young's modulus of the beam is E, the thickness is t, and the yield stress is σ, the maximum displacement allowed (allowable maximum displacement) is H. = (2/3) · σ · L 2 / (Et)
It is represented by
Since the Young's modulus and yield stress of the beam differ depending on the material, the above H is obtained in accordance with the material constituting the contact needle and the shape of the contact needle, and the distance D between the contact needle and the protective plate is made equal to or less than that H. You only have to set it.
[0008]
Incidentally, examples of the allowable range of the above D in some contact needles are shown.
Figure 0003651405
[0009]
Further, as shown in FIGS. 8 and 9, the probe of the present invention has an electrode 7 disposed at least on the surface of the protective plate on the contact needle side, and when the contact needle contacts the protective plate, the electrode contacts the electrode. A probe in which a circuit is formed and a continuity detecting device is provided on the circuit to detect contact between the contact needle 2 and the protection plate 3 may be used.
In the state of FIG. 8, a circuit is not formed, and a circuit is formed when the contact needle 2 bends and contacts the electrode 7 on the protective plate as shown in FIG.
As this continuity detection device, any circuit can be used as long as the circuit is formed only when the contact needle 2 and the electrode 7 on the protective plate are in contact with each other, and it can be determined that the circuit has been formed. For example, a voltmeter or an ammeter can be used.
The extraction of the signal from the electrode provided on the protective plate may be from the surface on the contact needle side of the electrode or from the side. Alternatively, a through hole may be provided in the protective plate in the portion where the electrode is provided, and the through hole may be filled with a metal or the like to form a conduction hole, which may be taken out from the back surface of the protection plate via the conduction hole.
[0010]
The electrode 7 may be provided in a portion where the contact needle 2 bends and contacts the protection plate 3, but may be provided on the entire contact needle side of the protection plate 3. Moreover, as shown to Fig.10 (a), you may provide in the whole surface of both the protection board 3 and the board | substrate 1 by the side of a contact needle. Further, the protective plate 3 itself may be conductive, or the protective plate 3 and the substrate 1 may be integrated, and it may be conductive. When the electrode is provided up to the substrate, or when the substrate is conductive, an insulating layer 9 is provided between the electrode or the conductive substrate and the contact needle so as not to conduct at this portion.
In the example of FIG. 10 (a), the slope between the substrate and the protective plate is an example. Such a shape is not limited to the case where the electrode is provided, and any probe of the present invention. In this case, this shape can be adopted.
Further, as shown in FIGS. 10B and 10C, the protective plate has a thickness that decreases from the substrate side toward the front end of the protective plate to form an inclined surface, and the portion is separated from the contact needle by that amount. May be. The start of the inclined surface may start from a position in contact with the contact needle as shown in (b), or may start from the middle in the substrate thickness direction as shown in (c).
[0011]
Since the probe of the present invention is provided with a protective plate, the contact needle does not bend excessively, and therefore there is no fear of breakage or plastic deformation. In particular, when the tip of the protective plate protrudes ahead of the tip of the contact needle, there is an effect that the contact needle can be reliably protected. When the tip of the contact needle protrudes from the tip of the protective plate, the contact needle can be largely displaced. In addition, when the protective plate is provided with electrodes, the contact of the contact needle to the protective plate can be detected electrically, so it is clear that there is no need to hold the contact needle strongly against the object to be inspected. It has the feature that damage to objects is reduced.
[0012]
Next, a method for manufacturing the probe of the present invention will be described. One end of the substrate 1 is cut out at a predetermined depth and width to form a recess 10. The concave portion starts in the middle of the substrate and has a shape in which the concave portion continues to the end of the substrate, and can take various shapes as seen in FIGS. The depth of the concave portion 10 is set to a value smaller than the above-described D, that is, the allowable maximum displacement H according to the material and shape of the beam formed as the contact needle. When an electrode is provided on the surface of the protective plate on the contact needle side, the value obtained by subtracting the thickness of the electrode from the notch width may be D. For this notch, laser processing, sand blasting, cutting processing, etching, milling, or the like may be appropriately employed depending on the material of the substrate.
[0013]
Then, the sacrificial layer 11 is formed by filling the recess 10 thus provided with a material as shown below. The sacrificial layer 11 is formed so that the sacrificial layer 11 is raised from the substrate 1 so that there is no recessed portion in the sacrificial layer 11 from the substrate surface. The state after filling is shown in FIG.
As a material for forming the sacrificial layer 11, metals such as copper and chromium, alumina, low melting point metals such as lead, tin, and indium, solvent-soluble or decomposable resins such as polyester resins, and the like can be used.
Next, the entire surface provided with the sacrificial layer is polished so that the entire surface becomes flat, and the sacrificial layer 11 remains only in the recess 10 and the substrate 1 is exposed in the other portions.
[0014]
Next, metal is sputtered on the entire surface composed of the sacrificial layer 11 and the substrate 1 to form a plating base layer 12. Examples of the metal forming the plating base layer include metals such as chromium, copper and nickel, alloys of these metals, and alloys of these metals with metals such as cobalt, iron and tungsten.
On the plated layer, a large number of formed contact needles are arranged in parallel to each other, and a pattern is formed such that each contact needle extends over the substrate 1 and the sacrificial layer. Then, an unnecessary part is covered with a resist, and a metal forming a contact needle is electroplated. This metal is a metal such as Ni, Ni—W, Ni—Fe, etc., and has an affinity for the plating base layer and has hardness, rigidity and elasticity suitable as a contact needle. The plating thickness is preferably about 10 to 80 μm.
[0015]
Next, the resist is removed by dissolution or ashing, and the exposed plating base layer is removed by, for example, milling. In this way, a substrate having the contact needle 2 extending over the substrate 1 and the sacrificial layer 11 and extending the back side substrate to form the protective plate 3 is obtained. This state is shown in FIG.
The probe of the present invention can be obtained by removing the unnecessary portion (the broken line portion in FIG. 12) and the sacrificial layer 11.
Laser processing, cutting, polishing, etching, or the like can be used to remove unnecessary portions.
The sacrificial layer can be removed by etching in the case of a metal such as copper or chromium, melting and removing in the case of a low melting point metal, and dissolution, hydrolysis, ashing or the like in the case of an organic substance.
[0016]
【The invention's effect】
Since the probe of the present invention is provided with a protective plate, the contact needle does not bend excessively, and therefore, the contact needle is not broken or plastically deformed. In addition, when the protective plate is provided with electrodes, the contact of the contact needle to the protective plate can be detected electrically, so it is clear that there is no need to hold the contact needle strongly against the object to be inspected. It has the feature that damage to objects is reduced.
According to the method for producing a probe of the present invention, the probe of the present invention can be easily obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a probe of the present invention.
FIG. 2 is a cross-sectional view showing an example of the probe of the present invention.
FIG. 3 is a cross-sectional view showing a state in which a probe is pressed against an object to be inspected.
FIG. 4 is a cross-sectional view showing another example of the probe of the present invention.
FIG. 5 is a cross-sectional view showing another example of the probe of the present invention.
FIG. 6 is a cross-sectional view showing another example of the probe of the present invention.
FIG. 7 is a cross-sectional view showing another example of the probe of the present invention.
FIG. 8 is a cross-sectional view showing another example of the probe of the present invention.
FIG. 9 is a cross-sectional view showing a state in which a probe is pressed against an object to be inspected.
FIGS. 10A, 10B, and 10C are cross-sectional views showing other examples of the probe of the present invention.
FIG. 11 is a cross-sectional view showing a state in which a material for forming a sacrificial layer is filled in a recess.
FIG. 12 is a view showing a state in which contact needles are formed from the substrate to the sacrificial layer.
FIG. 13 is a cross-sectional view showing a conventional example of a probe having a structure in which a contact needle protrudes in a cantilever manner.
FIG. 14 is a cross-sectional view showing a conventional example of a probe having a structure in which a contact needle protrudes in a cantilever manner, and shows a state where the contact needle is broken due to a force greater than a breaking stress.
[Explanation of symbols]
1: substrate, 2: contact needle, 3: protection plate, 4: object to be inspected, 5: window,
6: depression, 7: electrode, 9: insulating layer, 10: recess, 11: sacrificial layer,
12: plating base layer, 13: protective plate tip

Claims (6)

セラミックまたはガラスからなる基板から多数の接触針が片持ち梁形式で突出して設けられた構造のプローブであって、
該接触針の過大なたわみを防止する保護板が、該接触針を支持している基板上に、該接触針から離間して設けられ、
該接触針が、個々に独立した針状のものであって、個々の針全体が金属から構成されていることを特徴とするプローブ。
A probe having a structure in which a large number of contact needles project from a ceramic or glass substrate in a cantilever manner ,
A protective plate for preventing excessive deflection of the contact needle is provided on the substrate supporting the contact needle, spaced from the contact needle,
A probe characterized in that the contact needles are individually needle-shaped, and the entire individual needles are made of metal .
保護板が、接触針を支持している基板の一部が延長して形成されてなるものであることを特徴とする請求項1記載のプローブ。2. The probe according to claim 1, wherein the protective plate is formed by extending a part of the substrate supporting the contact needle. 保護板先端の基板からの距離が、接触針の突出長さより長いことを特徴とする請求項1または2のいずれかに記載のプローブ。The probe according to claim 1, wherein the distance from the substrate at the tip of the protective plate is longer than the protruding length of the contact needle. 接触針がたわんで保護板に接触した時点での針の変形歪みが針の材料の弾性限界応力時の歪み以下であることを特徴とする請求項1ないし3のいずれかに記載のプローブ。4. The probe according to claim 1, wherein the deformation deformation of the needle when the contact needle is bent and contacts the protective plate is equal to or less than the strain at the elastic limit stress of the material of the needle. 保護板の先端部位を導電性とし、この先端部位と接触針との接触を電気的に検出する回路を設けたことを特徴とする請求項1ないし4のいずれかに記載のプローブ。The probe according to any one of claims 1 to 4, wherein a tip portion of the protective plate is made conductive and a circuit for electrically detecting contact between the tip portion and the contact needle is provided. セラミックまたはガラスからなる基板上に凹部を形成し、この凹部に犠牲層を充填し、この基板上に、前記犠牲層上から基板上に延びる多数の金属からなる接触針を形成し、次いで、犠牲層を除去し、不要部分を除去して保護板を形成することを特徴とするプローブの製造方法。A concave portion is formed on a substrate made of ceramic or glass, a sacrificial layer is filled in the concave portion, and contact needles made of a number of metals extending from the sacrificial layer to the substrate are formed on the substrate, and then the sacrificial layer is formed. A method for manufacturing a probe, comprising: removing a layer and removing an unnecessary portion to form a protective plate .
JP2001092649A 2001-03-28 2001-03-28 Probe and manufacturing method thereof Expired - Fee Related JP3651405B2 (en)

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