JPH10303004A - Thermistor element and its manufacture - Google Patents

Thermistor element and its manufacture

Info

Publication number
JPH10303004A
JPH10303004A JP9105979A JP10597997A JPH10303004A JP H10303004 A JPH10303004 A JP H10303004A JP 9105979 A JP9105979 A JP 9105979A JP 10597997 A JP10597997 A JP 10597997A JP H10303004 A JPH10303004 A JP H10303004A
Authority
JP
Japan
Prior art keywords
external electrode
material layer
thermistor
inorganic material
electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9105979A
Other languages
Japanese (ja)
Inventor
Kensho Nagatomo
憲昭 長友
Masa Yonezawa
政 米澤
Hiroaki Nakajima
弘明 中島
Masami Koshimura
正己 越村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP9105979A priority Critical patent/JPH10303004A/en
Publication of JPH10303004A publication Critical patent/JPH10303004A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a thermistor element of superior thermal responsibility and productivity at low manufacturing cost, and provide a method for manufacturing it. SOLUTION: A thin film thermistor 2 is formed on the entire surface of a ceramic substrate 1. After a pair of internal electrodes 3 are formed on the thin film thermistor 2, an insulation inorganic material layer 4 is formed so as to cover the internal electrodes 3 and the exposed thin film thermistor 2. On the insulation inorganic material layer 4 on the upper side of each internal electrode 3, a conductive paste which contains metal powder and an inorganic bonding material is applied and burned so as to have an area smaller than the internal electrode 3 by screen printing, etc., to form an external electrode 5. Because of burning (baking) of this external electrode 5, the insulation inorganic material layer 4 sandwiched between the external electrode 5 and the internal electrodes 3 is absorbed by the external electrode 5, and a current flows through the external electrode 5 and the internal electrode 3. Then the substrate is cut into chip shapes, to obtain a plurality of thermistor elements.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、被計測対象の温度
を計測するためのサーミスタ素子と、その製造方法に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermistor element for measuring a temperature of an object to be measured and a method for manufacturing the same.

【0002】[0002]

【従来の技術】チップ状のサーミスタとしては、従来、
次の(1)、(2)のものが用いられている。
2. Description of the Related Art Conventionally, a chip-type thermistor has been
The following (1) and (2) are used.

【0003】(1) 遷移金属酸化物サーミスタ焼結体 Mn、Co、Ni、Fe、Cu等の遷移金属のうち2種
以上を混合、成形、焼成、切断により6面体からなるチ
ップ状のサーミスタ焼結体を形成し、そのサーミスタ焼
結体の相対向する端面にAg、Ag−Pd等の電極を形
成したサーミスタ。なお、必要に応じて、サーミスタ焼
結体の側面の2面ないし4面にガラス保護膜を形成す
る。
(1) Transition metal oxide thermistor sintered body A chip-shaped thermistor made of a hexahedron by mixing, molding, firing and cutting at least two types of transition metals such as Mn, Co, Ni, Fe and Cu. A thermistor in which a body is formed and electrodes such as Ag and Ag-Pd are formed on opposite end faces of the thermistor sintered body. If necessary, a glass protective film is formed on two to four side surfaces of the thermistor sintered body.

【0004】(2) 遷移金属酸化物薄膜サーミスタ及
びSiC薄膜サーミスタ アルミナ等のセラミックス基板上にAg−Pd、Au−
Pt等の対向櫛形電極膜をスクリーン印刷法等により形
成後、対向櫛形電極膜の一部を覆うように、SiCある
いはMn、Ni、Co、Feなどの複合酸化物薄膜をス
パッタリング蒸着によってサーミスタ薄膜を形成し、さ
らに、リード線を接続し、サーミスタ膜上に保護膜を形
成したサーミスタ。
(2) Transition metal oxide thin film thermistor and SiC thin film thermistor Ag-Pd, Au-
After forming an opposing comb-shaped electrode film such as Pt by a screen printing method or the like, a thermistor thin film is formed by sputtering evaporation of SiC or a complex oxide thin film of Mn, Ni, Co, Fe, etc. so as to cover a part of the opposing comb-shaped electrode film. A thermistor formed and connected to a lead wire, and a protective film is formed on the thermistor film.

【0005】[0005]

【発明が解決しようとする課題】上記(1)の遷移金属
酸化物サーミスタ焼結体は、強度的に薄板化が難しく、
そのため熱応答性に劣るという問題がある。
The transition metal oxide thermistor sintered body of the above (1) is difficult to make thin in terms of strength.
Therefore, there is a problem that thermal responsiveness is poor.

【0006】上記(2)の遷移金属酸化物薄膜サーミス
タ及びSiC薄膜サーミスタにおいては、結晶性のよい
熱的に安定な薄膜サーミスタを得るためには、スパッタ
リング蒸着法において基板温度を高温度(400℃以
上)にする必要があり、生産性が低く、製造コストがか
かるという問題がある。
In the transition metal oxide thin film thermistor and the SiC thin film thermistor of the above (2), in order to obtain a thermally stable thin film thermistor having good crystallinity, the substrate temperature is increased to a high temperature (400 ° C.) in the sputtering deposition method. Above), there is a problem that productivity is low and manufacturing cost is high.

【0007】本発明は、これらの問題点を解決し、熱応
答性に優れ、しかも生産性が良く製造コストが低いサー
ミスタ素子と、その製造方法を提供することを目的とす
る。
An object of the present invention is to solve the above problems and to provide a thermistor element having excellent thermal responsiveness, high productivity and low manufacturing cost, and a method of manufacturing the same.

【0008】[0008]

【課題を解決するための手段】本発明のサーミスタ素子
は、セラミックス基板の一主表面に全面に亘って設けら
れた薄膜状のサーミスタと、該薄膜サーミスタの上に設
けられた一対の内部電極と、該内部電極を覆う絶縁性無
機物質層と、各内部電極上に該内部電極よりも小さい面
積にて形成されておりそれぞれ下層の該内部電極に対し
導通している外部電極とを備えたサーミスタ素子であっ
て、該絶縁性無機物質層を該内部電極の全面を覆うよう
に形成した後、その上に金属粉末と無機結合材を含む導
電性ペーストを焼き付けることにより前記外部電極を形
成すると共に、この焼き付けにより該絶縁性無機物質層
の一部を該外部電極に吸収させて外部電極と内部電極と
を導通させてなるものである。
A thermistor element according to the present invention comprises a thin-film thermistor provided on the entire main surface of a ceramic substrate, and a pair of internal electrodes provided on the thin-film thermistor. A thermistor comprising: an insulating inorganic material layer covering the internal electrodes; and external electrodes formed on each of the internal electrodes with a smaller area than the internal electrodes, each of which is electrically connected to the lower internal electrodes. An element, wherein the insulating inorganic material layer is formed so as to cover the entire surface of the internal electrode, and then the external electrode is formed by baking a conductive paste containing a metal powder and an inorganic binder thereon. The baking causes a part of the insulating inorganic material layer to be absorbed by the external electrode, thereby making the external electrode and the internal electrode conductive.

【0009】かかる本発明のサーミスタ素子は、薄膜よ
りなるサーミスタ層を有するものであり、熱応答性に優
れる。
The thermistor element of the present invention has a thermistor layer made of a thin film and has excellent thermal responsiveness.

【0010】本発明のサーミスタ素子の製造方法は、金
属含有有機溶液をセラミックス基板の一主表面にスピン
コート、仮焼を繰り返すことによりセラミックス基板の
全面に亘り成膜し、次いで焼成して薄膜状のサーミスタ
とする工程と、該薄膜状のサーミスタの上面に一対の内
部電極を形成する工程と、該内部電極の上面に全面に亘
り絶縁性無機物質層を形成する工程と、該無機物質層の
上面のうち内部電極の上側の部分に、金属粉末と無機結
合材とを含む導電性ペーストを該内部電極よりも小さな
面積となるように付着させた後焼成し、外部電極を形成
すると共に該絶縁性無機物質層の一部を外部電極に吸収
させて外部電極と内部電極とを導通させる工程と、該外
部電極を形成したウエハ状薄膜サーミスタをチップ状に
切断する工程と、を含むものである。
In the method for manufacturing a thermistor element of the present invention, a metal-containing organic solution is spin-coated on one main surface of a ceramic substrate and calcined repeatedly to form a film over the entire surface of the ceramic substrate, and then fired to form a thin film. Forming a pair of internal electrodes on the upper surface of the thin film thermistor; forming an insulating inorganic material layer over the entire upper surface of the internal electrode; A conductive paste containing a metal powder and an inorganic binder is adhered to a portion of the upper surface above the internal electrode so as to have a smaller area than the internal electrode, and then baked to form an external electrode and form the insulating material. A step of absorbing a portion of the conductive inorganic material layer to the external electrode to conduct the external electrode and the internal electrode, and a step of cutting the wafer-like thin-film thermistor on which the external electrode is formed into chips, It is intended to include.

【0011】このサーミスタ素子の製造方法において
は、外部電極の焼き付けにより外部電極と内部電極との
間の絶縁性無機物質層を該外部電極に吸収させて外部電
極を内部電極に導通させるようにしており、製造プロセ
スが簡略化され、量産化に適し、製造コストを低減でき
る。
In this method of manufacturing a thermistor element, the baking of the external electrode causes the insulating inorganic material layer between the external electrode and the internal electrode to be absorbed by the external electrode so that the external electrode is electrically connected to the internal electrode. Therefore, the manufacturing process is simplified, suitable for mass production, and the manufacturing cost can be reduced.

【0012】なお、外部電極部にリード線等の引き出し
線を接続する加熱処理を施しても、その下地に内部電極
膜があるので、外部電極部の剥離が発生しにくくなる。
[0012] Even if a heat treatment for connecting a lead wire or the like to the external electrode portion is performed, the external electrode portion is less likely to be peeled off since the internal electrode film is provided under the heat treatment.

【0013】[0013]

【発明の実施の形態】図1(a)は実施の形態に係るサ
ーミスタ素子の製造方法を示す断面図、図1(b),
(c)はそれぞれ図1(a)のB−B線、C−C線に沿
う断面図である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a sectional view showing a method for manufacturing a thermistor element according to an embodiment, and FIGS.
(C) is sectional drawing which follows the BB line and CC line of FIG. 1 (a), respectively.

【0014】このサーミスタ素子を製造するには、まず
アルミナ等のセラミックス基板1の上に全面に亘り薄膜
サーミスタ2を形成する(図1(a)の〜)。この
薄膜サーミスタ2の上に1対の内部電極3を形成(同
)した後、この内部電極3及び露出した薄膜サーミス
タ2を覆うように絶縁性無機物質層4を形成する(同
)。
In order to manufacture this thermistor element, first, a thin-film thermistor 2 is formed on the entire surface of a ceramic substrate 1 made of alumina or the like (FIG. 1A). After a pair of internal electrodes 3 are formed on the thin-film thermistor 2 (same as above), an insulating inorganic material layer 4 is formed so as to cover the internal electrodes 3 and the exposed thin-film thermistor 2 (same as above).

【0015】次に、各内部電極3の上側の絶縁性無機物
質層4の上に、金属粉末と無機結合材を含む導電性ペー
ストをスクリーン印刷等により、内部電極3よりも小面
積となるように塗着し(同)、次いで乾燥及び焼成す
ることにより外部電極5を形成する。この外部電極5の
焼成(焼き付け)により、外部電極5と内部電極4との
間に介在していた絶縁性無機物質層4は外部電極5に吸
収され、外部電極5と内部電極3とが導通する(同
)。
Next, a conductive paste containing a metal powder and an inorganic binder is screen-printed or the like on the insulating inorganic material layer 4 above each internal electrode 3 so as to have a smaller area than the internal electrodes 3. , And then dried and fired to form an external electrode 5. By firing (baking) of the external electrode 5, the insulating inorganic material layer 4 interposed between the external electrode 5 and the internal electrode 4 is absorbed by the external electrode 5, and the external electrode 5 and the internal electrode 3 are electrically connected. Yes (same).

【0016】なお、図1(a)では、セラミックス基板
1は紙面と垂直方向及び左右方向に拡がっており、上記
〜の工程を経た後、この基板をチップ状に切断し、
複数個のサーミスタ素子を得る。図1(b),(c)は
このようにして得られたチップ状薄膜サーミスタの断面
図である。
In FIG. 1A, the ceramic substrate 1 extends in the direction perpendicular to the plane of the drawing and in the left-right direction. After the above-mentioned steps (1) and (2), the substrate is cut into chips.
Obtain a plurality of thermistor elements. FIGS. 1B and 1C are cross-sectional views of the chip-shaped thin film thermistor thus obtained.

【0017】上記〜の工程の好適な形態を詳しく説
明する。
Preferred embodiments of the above steps (1) to (4) will be described in detail.

【0018】工程,:セラミックス基板としてはア
ルミナ基板が好ましく、その厚さは例えば0.1〜1.
0μm程度とされる。
Step: The ceramic substrate is preferably an alumina substrate, and has a thickness of, for example, 0.1 to 1.
It is about 0 μm.

【0019】この基板上に薄膜サーミスタを成膜するに
は、金属含有有機溶液をスピンコートし、乾燥し、これ
を複数回繰り返して所定厚みのコート層を得た後、仮焼
及び焼成するのが好ましい。
In order to form a thin film thermistor on this substrate, a metal-containing organic solution is spin-coated, dried, and repeated a plurality of times to obtain a coat layer having a predetermined thickness, and then calcined and fired. Is preferred.

【0020】金属含有有機溶液としては有機金属化合物
を有機溶媒に混合したものであっても良く、有機溶媒に
溶解する無機化合物を該有機溶媒に溶解させたものであ
っても良く、要するに塗付、乾燥及び焼成によりサーミ
スタ組成の酸化物薄膜が基板上に形成されるものであれ
ば良い。サーミスタ組成は特に限定されるものではな
く、例えばMn、Fe、Co、Ni、Cu、Al等の金
属の酸化物よりなる各種組成のものを採用できる。
The metal-containing organic solution may be a mixture of an organic metal compound in an organic solvent, or a solution of an inorganic compound soluble in the organic solvent in the organic solvent. It is sufficient that an oxide thin film having a thermistor composition is formed on the substrate by drying and firing. The thermistor composition is not particularly limited, and for example, various compositions composed of oxides of metals such as Mn, Fe, Co, Ni, Cu, and Al can be employed.

【0021】焼成温度、時間はサーミスタ組成に応じ適
宜選定すれば良い。
The firing temperature and time may be appropriately selected according to the thermistor composition.

【0022】薄膜サーミスタ2の膜厚は、特に限定され
るものではないが、通常は0.1〜2μm程度とされ
る。
The thickness of the thin film thermistor 2 is not particularly limited, but is usually about 0.1 to 2 μm.

【0023】工程:内部電極3を形成するには、A
u、Ag、Pt等の貴金属レジネート(貴金属の樹脂酸
(例えばアビエチン酸)化合物を有機溶剤に溶解させた
もの)をスクリーン印刷し、焼き付けるのが好ましい。
内部電極3の厚さは0.1〜1μm程度が好ましい。
Step: To form the internal electrode 3, A
It is preferable to screen-print and bake a noble metal resinate such as u, Ag, Pt or the like (a noble metal resin acid (eg, abietic acid) compound dissolved in an organic solvent).
The thickness of the internal electrode 3 is preferably about 0.1 to 1 μm.

【0024】工程:絶縁性無機物質層4は、50wt
%以上のSiO2 と、残部がAl23 、MgO、Zr
2 及びTiO2 よりなる群から選ばれる1種または2
種以上の酸化物を主成分とするガラスより構成されるの
が好ましい。この絶縁性無機物質層4はスパッタリング
により厚さ0.1〜2μmとなるように形成されるのが
好ましい。
Step: The insulating inorganic material layer 4 is 50 wt.
% Of SiO 2 and the balance being Al 2 O 3 , MgO, Zr
O 2 and one or selected from the group consisting of TiO 2
It is preferable to be composed of glass containing at least one kind of oxide as a main component. The insulating inorganic material layer 4 is preferably formed by sputtering to a thickness of 0.1 to 2 μm.

【0025】なお、絶縁性無機物質層4の厚さが0.1
μmよりも小さいと、絶縁物性が低い。2μmよりも大
きいときには、外部電極5と内部電極3との間に絶縁性
無機物質層が残留し、外部電極5と内部電極3との導通
が不十分になり、また、サーミスタの熱応答性も低下す
る。
The thickness of the insulating inorganic material layer 4 is 0.1
If it is smaller than μm, the insulating properties are low. When the thickness is larger than 2 μm, the insulating inorganic material layer remains between the external electrode 5 and the internal electrode 3, the conduction between the external electrode 5 and the internal electrode 3 becomes insufficient, and the thermal response of the thermistor also decreases. descend.

【0026】工程,:外部電極5はAu、Ag、P
t等の貴金属の粉末と、SiO2 、B2 3 、Na
2 O、PbO、ZnO及びBaOの1又は2種以上の酸
化物を主成分とするガラス粉末とを含むペーストをスク
リーン印刷し、乾燥後、焼成されることにより形成され
るのが好ましい。前述の通り、この焼成過程において内
部電極3と外部電極用ペースト付着層との間の絶縁性無
機物質層4がこのペースト中のガラスと共に溶融し、外
部電極5中に吸収されて消滅し、形成された外部電極5
が内部電極3と直に導通するようになる。
Step: The external electrode 5 is made of Au, Ag, P
powder of a noble metal such as t, SiO 2 , B 2 O 3 , Na
It is preferably formed by screen-printing a paste containing a glass powder mainly containing one or more oxides of 2 O, PbO, ZnO and BaO, drying and firing. As described above, in the firing process, the insulating inorganic material layer 4 between the internal electrode 3 and the external electrode paste-adhering layer is melted together with the glass in this paste, absorbed by the external electrode 5 and extinguished. External electrode 5
Are directly conducted to the internal electrodes 3.

【0027】なお、上記の絶縁性無機物質層4のガラス
及び外部電極形成用ペーストの無機結合剤の組成として
は、例えば次の範囲のものが好適である。
The composition of the glass of the insulating inorganic material layer 4 and the inorganic binder of the paste for forming the external electrode is preferably in the following range, for example.

【0028】SiO2 40wt%以上 PbO2 30wt%以下 ZnO2 30wt%以下 BaO2 30wt%以下SiO 2 40 wt% or more PbO 2 30 wt% or less ZnO 2 30 wt% or less BaO 2 30 wt% or less

【0029】[0029]

【実施例】【Example】

<実施例1> (1) 炭酸マンガンと炭酸コバルトを35モル:65
モルの割合でエチレングリコールに溶解して酢酸を添加
混合して調製した有機金属塗布溶液を、アルミナ基板
(厚さ0.5μm)の表面にスピンコートし、120℃
で10分間乾燥後、600℃で10分間仮焼した。この
工程を15回繰り返した後、900℃で1時間焼成を行
い1.5μmの薄膜サーミスタを得た。 (2) 次に、薄膜サーミスタの一部にAuレジネート
ペーストをスクリーン印刷法により塗布し、120℃で
10分間乾燥後、850℃で10分間焼成を行い、0.
5μmの薄膜状の内部電極を得た。 (3) 次に、SiO2 42wt%、PbO2 19wt
%、ZnO2 1wt%、BaO2 24wt%を主成分と
する絶縁性無機焼結体をターゲットとし、圧力:0.4
Pa、基板温度:室温の条件でスパッタリングを行って
該内部電極及び薄膜サーミスタの上面の全面に厚さ1μ
mの絶縁性無機物質層を形成した。 (4) 次に、Auペーストをスクリーン印刷法によ
り、内部電極の面積よりも小さい面積で各内部電極の上
に塗布し、120℃で10分間乾燥後、820℃で10
分間焼成を行い、厚さ10μmの外部電極を形成した。 (5) 次に、この基板をパターンに沿ってチップ状に
切断し、1.6×0.8×0.5mmの大きさの薄膜サ
ーミスタを得た。 (6) 作製した薄膜サーミスタ素子10個の25℃、
50℃の抵抗値を測定し、その平均値と標準偏差から抵
抗値及びB定数のばらつきを計算した結果、抵抗値ばら
つきは2.4%、B定数ばらつきは0.07%であっ
た。
<Example 1> (1) 35 mol of manganese carbonate and cobalt carbonate: 65
An organometallic coating solution prepared by dissolving in ethylene glycol at a molar ratio and adding and mixing acetic acid was spin-coated on the surface of an alumina substrate (0.5 μm thick) at 120 ° C.
And then calcined at 600 ° C. for 10 minutes. After repeating this step 15 times, baking was performed at 900 ° C. for 1 hour to obtain a 1.5 μm thin film thermistor. (2) Next, an Au resinate paste was applied to a part of the thin film thermistor by a screen printing method, dried at 120 ° C. for 10 minutes, and baked at 850 ° C. for 10 minutes.
A 5 μm thin film internal electrode was obtained. (3) Next, 42 wt% of SiO 2 and 19 wt% of PbO 2
%, ZnO 2 1 wt%, and BaO 2 24 wt% as the main components.
Pa, substrate temperature: Sputtering is performed under the condition of room temperature, and a thickness of 1 μm is formed on the entire upper surface of the internal electrode and the thin film thermistor.
m of the insulating inorganic material layer was formed. (4) Next, an Au paste is applied on each internal electrode by a screen printing method in an area smaller than the area of the internal electrode, dried at 120 ° C. for 10 minutes, and then dried at 820 ° C. for 10 minutes.
Baking was performed for 10 minutes to form an external electrode having a thickness of 10 μm. (5) Next, the substrate was cut into chips along the pattern to obtain a thin film thermistor having a size of 1.6 × 0.8 × 0.5 mm. (6) 10 thin film thermistor elements manufactured at 25 ° C.
The resistance value at 50 ° C. was measured, and the variation in the resistance value and the B constant was calculated from the average value and the standard deviation. As a result, the variation in the resistance value was 2.4%, and the variation in the B constant was 0.07%.

【0030】[0030]

【発明の効果】以上の通り、本発明によると熱応答性が
良好な薄膜サーミスタが提供される。この薄膜サーミス
タは、その製造プロセスが簡略化され、量産化に適し、
製造コストが低い。この薄膜サーミスタは、外部電極が
内部電極に付着するように形成されているため、外部電
極にリード線等の引出線を接続する際に加熱処理を施し
ても、外部電極が剥離しにくい。
As described above, according to the present invention, a thin film thermistor having good thermal responsiveness is provided. This thin film thermistor simplifies its manufacturing process and is suitable for mass production.
Low production cost. Since the thin-film thermistor is formed such that the external electrode adheres to the internal electrode, the external electrode is unlikely to be peeled off even when a heat treatment is performed when a lead wire such as a lead wire is connected to the external electrode.

【図面の簡単な説明】[Brief description of the drawings]

【図1】実施の形態に係る薄膜サーミスタの製造工程図
と断面図である。
FIG. 1 is a manufacturing process diagram and a cross-sectional view of a thin-film thermistor according to an embodiment.

【符号の説明】[Explanation of symbols]

1 セラミックス基板 2 薄膜サーミスタ 3 内部電極 4 絶縁性無機物質層 5 外部電極 DESCRIPTION OF SYMBOLS 1 Ceramic substrate 2 Thin film thermistor 3 Internal electrode 4 Insulating inorganic material layer 5 External electrode

───────────────────────────────────────────────────── フロントページの続き (72)発明者 越村 正己 埼玉県秩父郡横瀬町大字横瀬2270番地 三 菱マテリアル株式会社電子技術研究所内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaki Koshimura 2270 Yokoze, Yokoze-cho, Chichibu-gun, Saitama Pref.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 セラミックス基板の一主表面に全面に亘
って設けられた薄膜状のサーミスタと、 該薄膜サーミスタの上に設けられた一対の内部電極と、
該内部電極を覆う絶縁性無機物質層と、 各内部電極上に該内部電極よりも小さい面積にて形成さ
れておりそれぞれ下層の該内部電極に対し導通している
外部電極とを備えたサーミスタ素子であって、 該絶縁性無機物質層を該内部電極の全面を覆うように形
成した後、その上に金属粉末と無機結合材を含む導電性
ペーストを焼き付けることにより前記外部電極を形成す
ると共に、この焼き付けにより該絶縁性無機物質層の一
部を該外部電極に吸収させて外部電極と内部電極とを導
通させてなるサーミスタ素子。
A thin-film thermistor provided on the entire main surface of a ceramic substrate; a pair of internal electrodes provided on the thin-film thermistor;
A thermistor element comprising: an insulating inorganic material layer covering the internal electrodes; and external electrodes formed on each of the internal electrodes with a smaller area than the internal electrodes and each of which is electrically connected to the lower internal electrodes. And forming the external electrode by forming the insulating inorganic material layer so as to cover the entire surface of the internal electrode, and then baking a conductive paste containing a metal powder and an inorganic binder thereon. A thermistor element in which a part of the insulating inorganic material layer is absorbed by the external electrode by this baking to make the external electrode and the internal electrode conductive.
【請求項2】 請求項1において、前記絶縁性無機物質
層の厚さが0.1〜2μmであることを特徴とするサー
ミスタ素子。
2. The thermistor element according to claim 1, wherein the thickness of the insulating inorganic material layer is 0.1 to 2 μm.
【請求項3】 請求項1又は2において、該絶縁性無機
物質層が50wt%以上のSiO2 と、残部がAl2
3 、MgO、ZrO2 及びTiO2 よりなる群から選ば
れる1種または2種以上の酸化物を主成分とするガラス
より構成され、無機結合材がSiO2 、B2 3 、Na
2 O、PbO、ZnO及びBaOの1種または2種以上
の酸化物を主成分とするガラス微粒子より構成されてい
ることを特徴とするサーミスタ素子。
3. The insulating inorganic material layer according to claim 1, wherein the insulating inorganic material layer comprises at least 50 wt% of SiO 2, and the remainder comprises Al 2 O.
3 , glass composed mainly of one or more oxides selected from the group consisting of MgO, ZrO 2 and TiO 2 , wherein the inorganic binder is SiO 2 , B 2 O 3 , Na
A thermistor element comprising glass fine particles containing one or more oxides of 2 O, PbO, ZnO and BaO as main components.
【請求項4】 金属含有有機溶液をセラミックス基板の
一主表面にスピンコート、仮焼を繰り返すことによりセ
ラミックス基板の全面に亘り成膜し、次いで焼成して薄
膜状のサーミスタとする工程と、 該薄膜状のサーミスタの上面に一対の内部電極を形成す
る工程と、 該内部電極の上面に全面に亘り絶縁性無機物質層を形成
する工程と、 該無機物質層の上面のうち内部電極の上側の部分に、金
属粉末と無機結合材とを含む導電性ペーストを該内部電
極よりも小さな面積となるように付着させた後焼成し、
外部電極を形成すると共に該絶縁性無機物質層の一部を
外部電極に吸収させて外部電極と内部電極とを導通させ
る工程と、 該外部電極を形成したウエハ状薄膜サーミスタをチップ
状に切断する工程と、を含む薄膜サーミスタの製造方
法。
4. A step of forming a film over the entire surface of the ceramic substrate by repeatedly spin-coating and calcining a metal-containing organic solution on one main surface of the ceramic substrate, and then firing to form a thin-film thermistor; Forming a pair of internal electrodes on the upper surface of the thin-film thermistor; forming an insulating inorganic material layer over the entire upper surface of the internal electrode; To the portion, a conductive paste containing a metal powder and an inorganic binder is attached so as to have a smaller area than the internal electrode, and then baked,
Forming an external electrode and absorbing a part of the insulating inorganic material layer into the external electrode to conduct the external electrode and the internal electrode; cutting the wafer-like thin film thermistor on which the external electrode is formed into chips; And a method for producing a thin film thermistor.
JP9105979A 1997-04-23 1997-04-23 Thermistor element and its manufacture Pending JPH10303004A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9105979A JPH10303004A (en) 1997-04-23 1997-04-23 Thermistor element and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9105979A JPH10303004A (en) 1997-04-23 1997-04-23 Thermistor element and its manufacture

Publications (1)

Publication Number Publication Date
JPH10303004A true JPH10303004A (en) 1998-11-13

Family

ID=14421880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9105979A Pending JPH10303004A (en) 1997-04-23 1997-04-23 Thermistor element and its manufacture

Country Status (1)

Country Link
JP (1) JPH10303004A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5216947B1 (en) * 2012-10-19 2013-06-19 株式会社岡崎製作所 RTD element for cryogenic use
JP2022551043A (en) * 2020-09-02 2022-12-07 テーデーカー エレクトロニクス アーゲー Sensor element and method for manufacturing sensor element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5216947B1 (en) * 2012-10-19 2013-06-19 株式会社岡崎製作所 RTD element for cryogenic use
JP2022551043A (en) * 2020-09-02 2022-12-07 テーデーカー エレクトロニクス アーゲー Sensor element and method for manufacturing sensor element

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