JPS6262699A - Piezoelectric sounding body - Google Patents
Piezoelectric sounding bodyInfo
- Publication number
- JPS6262699A JPS6262699A JP20300185A JP20300185A JPS6262699A JP S6262699 A JPS6262699 A JP S6262699A JP 20300185 A JP20300185 A JP 20300185A JP 20300185 A JP20300185 A JP 20300185A JP S6262699 A JPS6262699 A JP S6262699A
- Authority
- JP
- Japan
- Prior art keywords
- sounding body
- piezoelectric ceramic
- plate
- ceramic element
- piezoelectric
- 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.)
- Granted
Links
Landscapes
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
この発明は各種電子回路に組込んで必要に応じ所定の音
響を発音させて報知、警報等に用いる圧電発音体に関す
るものでおる。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a piezoelectric sounding body that is incorporated into various electronic circuits and used for notifications, alarms, etc. by emitting predetermined sounds as necessary.
〈従来の技術とその問題点〉
圧電発音体は図示するように、圧電セラミック素子板2
の両面全体に金属膜からなる電極1.1を設け、この圧
電セラミック素子板2の片面に金属板からなる導電板4
を接着剤3を介して接合させて得ていた。<Conventional technology and its problems> As shown in the figure, a piezoelectric sounding element has a piezoelectric ceramic element plate 2.
An electrode 1.1 made of a metal film is provided on the entire both sides of the piezoelectric ceramic element plate 2, and a conductive plate 4 made of a metal plate is provided on one side of the piezoelectric ceramic element plate 2.
were obtained by joining them together via adhesive 3.
しかし、この圧電セラミック素子板2と導電板4との接
着には、
■ エポキシ樹脂による接着
■ 嫌気性樹脂による接着
■ 紫外線硬化樹脂による接着
などの方法が行なわれてきている。However, methods such as (1) adhesion using epoxy resin, (2) adhesion using anaerobic resin, and (2) adhesion using ultraviolet curing resin have been used to bond the piezoelectric ceramic element plate 2 and the conductive plate 4 together.
ところがこれらは、■の方法では1qられた発音体は変
換効率が高く、湿度に対して信頼性は高いが、耐熱衝撃
性が悪く、圧電セラミック素子内部に割れやクラックが
発生しやすい。■の嫌気性樹脂による接着では接着剤の
はみ出し部分が嫌気性にならないため硬化せず、従って
この部分を洗浄する必要が生じ、この洗浄工程だけ製造
工程が一つ増えることになりコスト的に問題である。ざ
らに■の紫外線硬化樹脂による接着は、紫外線照射でき
ない面が十分に硬化しない。However, in the method (2), the sounding body with 1q has high conversion efficiency and high reliability against humidity, but has poor thermal shock resistance and is prone to cracks and cracks inside the piezoelectric ceramic element. In case of bonding with anaerobic resin (2), the protruding part of the adhesive does not become anaerobic and therefore does not harden.Therefore, this part needs to be cleaned, and this cleaning process adds one more manufacturing process, which poses a cost problem. It is. When adhering with the ultraviolet curing resin of Zaraani (■), the surface that cannot be irradiated with ultraviolet rays does not cure sufficiently.
などの問題が指摘され、特性のよい圧電発音体を得るま
でには至っていない。Problems such as these have been pointed out, and it has not yet been possible to obtain a piezoelectric sounding body with good characteristics.
〈問題点を解決するための手段〉
この発明は上記のような従来の圧電発音体の問題点を解
決するべく検討の結果、なされたものであり、圧電セラ
ミック素子板と導電板とを紫外線硬化併用嫌気性樹脂組
成物を接着剤に用いて接着せしめて変換効率が高く、湿
度および熱的変化に対して信頼性の高いすぐれた圧電発
音体を提供するものでおる。<Means for Solving the Problems> The present invention was made as a result of studies to solve the problems of the conventional piezoelectric sounding body as described above. The anaerobic resin composition used in combination is bonded with an adhesive to provide an excellent piezoelectric sounding body with high conversion efficiency and high reliability against humidity and thermal changes.
〈作用〉 以下この発明をざらに詳しく説明する。<Effect> This invention will be explained in detail below.
この発明において用いる圧電セラミック素子板はその形
状が、例えば厚さ0.22 mm、直径19.8mm、
電極直径18.2mmで、3kV/mmで10分間分極
処理せるものでおる。そしてこのような圧電セラミック
素子板2の両面に電極1.1を設け、該圧電セラミック
素子板2と導電板4、例えば厚さ0.3mm、直径27
mmの黄銅板とを接着剤で接着して圧電発音体とするに
は、紫外線硬化併用嫌気性樹脂組成物を用い、主波長3
65nm、水銀ランプ80W/cmを有する紫外線照射
装置にて照射時間40秒、固着時間約2分の接着を行な
えばよい。The shape of the piezoelectric ceramic element plate used in this invention is, for example, 0.22 mm in thickness, 19.8 mm in diameter,
The electrode has a diameter of 18.2 mm and can be polarized at 3 kV/mm for 10 minutes. Electrodes 1.1 are provided on both sides of the piezoelectric ceramic element plate 2, and the piezoelectric ceramic element plate 2 and the conductive plate 4 have a thickness of 0.3 mm and a diameter of 27 mm, for example.
In order to make a piezoelectric sounding element by bonding a brass plate of
Adhesion may be performed using an ultraviolet irradiation device having a wavelength of 65 nm and a mercury lamp of 80 W/cm for an irradiation time of 40 seconds and a fixing time of about 2 minutes.
この発明で接着剤として用いる紫外線硬化併用嫌気性樹
脂組成物は、
(A):ビスフェノールーA 10〜50重量
部ジメタクリレート
(B):テ1〜ラエチレングリコール 10〜3Q
uジメタクリシー1へ
(C):ウレタンアクリレート 50〜80〃プレ
ポリマー
(イ旦しA十B十〇= 100重量部)を主成分として
、これに重合開始剤、重合促進剤光増感剤、重合抑制剤
などを加えた樹脂組成物である。The anaerobic resin composition combined with ultraviolet curing used as an adhesive in this invention is as follows: (A): Bisphenol-A 10-50 parts by weight dimethacrylate (B): Te1-La ethylene glycol 10-3Q
To u dimethacrylic acid 1 (C): Urethane acrylate 50-80 Prepolymer (100 parts by weight of A + B = 100 parts by weight) is the main component, and a polymerization initiator, a polymerization accelerator, a photosensitizer, and a polymerization It is a resin composition containing an inhibitor and the like.
このような紫外線硬化併用嫌気性樹脂組成物における主
成分でおるA、B、Cの材料を上記した範囲に限定する
のは、Aの材料が10重量部より少ないと耐湿特性が低
下し、50重量部より多いと耐熱衝撃性が低下するため
でおる。またBの材料を10〜30重量部とするのは、
10重旧都より少ないと、接着剤粘度が高くなって、接
着作業が困難であり、30重量部をこえると接着強度が
低下し、実用性のある発音体が得られないためでおる。The reason for limiting the materials A, B, and C, which are the main components in such an anaerobic resin composition combined with ultraviolet curing, to the above-mentioned range is because if the amount of material A is less than 10 parts by weight, the moisture resistance property will decrease. This is because if the amount exceeds 1 part by weight, the thermal shock resistance decreases. Also, when the amount of material B is 10 to 30 parts by weight,
If the amount is less than 10 parts by weight, the viscosity of the adhesive becomes high and the bonding operation becomes difficult, and if it exceeds 30 parts by weight, the adhesive strength decreases and a practical sounding body cannot be obtained.
ざらにCの材料は50重量部より少ないと耐熱衝撃性が
低下し、80重量部をこえると耐湿特性が低下するため
50〜80重量部の範囲が適当でおる。If the amount of the material Rarani C is less than 50 parts by weight, the thermal shock resistance will decrease, and if it exceeds 80 parts by weight, the moisture resistance will decrease, so a range of 50 to 80 parts by weight is appropriate.
〈実施例〉
ジメタクリレート
(B):テトラエチレングリコール 10 Nジ
メタクリレート
(C):ウレタンアクリレート 70〃プレポ
リマー
クメンヒドロパーオキ4犬イド 3 〃P−ベンゾフ
ェノン 3 〃ベンゾイックスルホイミド
1.5 11ジエチル−P−トルイジン 0,5〃
P−ベンゾキノン 0.01 #上記の配
合よりなる紫外線硬化併用嫌気性樹脂組成物を接着剤と
して、両面に電極を有する圧電セラミック素子板と黄銅
板とを主波長365nm、水銀ランプ80W/cmの紫
外線照射装置にて40秒照射、固着時間2分の条件で接
着して圧電発音体を得た。<Example> Dimethacrylate (B): Tetraethylene glycol 10 N dimethacrylate (C): Urethane acrylate 70 Prepolymer cumene hydroperoxy 4-dogide 3 P-benzophenone 3 Benzoic sulfimide
1.5 11 diethyl-P-toluidine 0,5〃
P-benzoquinone 0.01 #Using the ultraviolet curing anaerobic resin composition having the above composition as an adhesive, a piezoelectric ceramic element plate having electrodes on both sides and a brass plate were exposed to ultraviolet light with a dominant wavelength of 365 nm and a mercury lamp of 80 W/cm. A piezoelectric sounding body was obtained by bonding under the conditions of irradiation for 40 seconds using an irradiation device and fixing time of 2 minutes.
得られた圧電発音体について、その特性をテストしたと
ころ、第1表に示す結果が得られた。When the characteristics of the obtained piezoelectric sounding body were tested, the results shown in Table 1 were obtained.
なお比較量として
比較例1
(A):ビスフェノールーA 100重量
部ジメタクリレート
クメンヒドロパーオキザイド 3 〃P−ベンゾフェ
ノン 3 〃ベンゾイックスルホイミド
1.5〃ジエチル−P−トルイジン 0.5〃P−ベ
ンゾキノン 0.01 //なる配合の樹
脂組成物を接着剤として実施例と同じようにして圧電発
音体を得た。Comparative Example 1 (A): Bisphenol A 100 parts by weight dimethacrylate cumene hydroperoxide 3 P-benzophenone 3 benzoic sulfimide
A piezoelectric sounding body was obtained in the same manner as in the example using a resin composition having the following composition as an adhesive: 1.5 diethyl-P-toluidine 0.5 P-benzoquinone 0.01 //.
ざらに比較例1の(A>ビスフェノール−Aジメタクリ
レートを(B)テトラエチレングリコールジメタクリレ
ートに代えたものを比較例2とし、また(C)ウレタン
アクリレートプレポリマーに代えたものを比較例3とし
て、同様に圧電発音体をjqた。比較例2より1qた圧
電発音体は実用性のあるものではなかったので比較例1
と3より得た圧電発音体について同様のテストを行い、
第1表にその結果を示した。Roughly, Comparative Example 2 is obtained by replacing (A>bisphenol-A dimethacrylate in Comparative Example 1 with (B) tetraethylene glycol dimethacrylate), and Comparative Example 3 is obtained by replacing (C) urethane acrylate prepolymer with (C) urethane acrylate prepolymer. Similarly, a piezoelectric sounding body of 1q was used.Since the piezoelectric sounding body of 1q from Comparative Example 2 was not practical, Comparative Example 1 was used.
A similar test was conducted on the piezoelectric sounding body obtained from 3.
Table 1 shows the results.
第 1 表
注 *1:耐湿試験は85°C185%RH,100H
vの条件で行った。Table 1 Note *1: Humidity test: 85°C, 185%RH, 100H
It was conducted under the conditions of v.
*2:熱衝撃試験は一55°C,30分 85°C,3
0分の10サイクルで行った。*2: Thermal shock test: -55°C, 30 minutes 85°C, 3
It was performed in 10 cycles of 0 minutes.
〈発明の効果〉
上表から、この発明で接着剤として用いる紫外線硬化併
用嫌気性樹脂組成物のうち、その構成材料を夫々単独で
接着剤として用いた比較例は変換効率が高く、湿度に対
して信頼性の高いものは耐熱衝撃性が悪く、耐熱衝撃性
の良好なものは湿度に対する信頼性が乏しくなるという
結果を示したのに対し、この発明の圧電発音体は変換効
率が良好で必るとともに耐湿性、耐熱衝撃性のバランス
のよくとれた高信頼性のものであることが認められた。<Effects of the Invention> From the above table, it can be seen that among the UV-cured anaerobic resin compositions used as adhesives in the present invention, comparative examples in which each of the constituent materials was used alone as an adhesive had high conversion efficiency and was resistant to humidity. In contrast, the piezoelectric sounding element of the present invention has good conversion efficiency and has poor thermal shock resistance, and those with good thermal shock resistance have poor reliability against humidity. It was also found to be highly reliable with a good balance of moisture resistance and thermal shock resistance.
図面は圧電発音体の構造を示す断面図で必る。 The drawings are necessarily sectional views showing the structure of the piezoelectric sounding body.
Claims (2)
面側と導電板とを紫外線硬化併用嫌気性樹脂組成物にて
接着せしめてなることを特徴とする圧電発音体。(1) A piezoelectric sounding body characterized in that one side of a piezoelectric ceramic element plate having electrode films on both sides and a conductive plate are adhered with an anaerobic resin composition combined with ultraviolet curing.
ル−Aジメタクリレート、テトラエチレングリコールジ
メタクリレートおよびウレタンアクリレートプレポリマ
ーを主成分とする樹脂組成物であることを特徴とする特
許請求の範囲第1項記載の圧電発音体。(2) Claim 1, characterized in that the UV-curable anaerobic resin composition is a resin composition whose main components are bisphenol-A dimethacrylate, tetraethylene glycol dimethacrylate, and urethane acrylate prepolymer. The piezoelectric sounding body described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20300185A JPH0746879B2 (en) | 1985-09-12 | 1985-09-12 | Piezoelectric sounder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20300185A JPH0746879B2 (en) | 1985-09-12 | 1985-09-12 | Piezoelectric sounder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6262699A true JPS6262699A (en) | 1987-03-19 |
JPH0746879B2 JPH0746879B2 (en) | 1995-05-17 |
Family
ID=16466685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20300185A Expired - Lifetime JPH0746879B2 (en) | 1985-09-12 | 1985-09-12 | Piezoelectric sounder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0746879B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02100399U (en) * | 1989-01-27 | 1990-08-09 | ||
US5291460A (en) * | 1991-10-15 | 1994-03-01 | Murata Manufacturing Co., Ltd. | Piezoelectric sounding body |
-
1985
- 1985-09-12 JP JP20300185A patent/JPH0746879B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02100399U (en) * | 1989-01-27 | 1990-08-09 | ||
US5291460A (en) * | 1991-10-15 | 1994-03-01 | Murata Manufacturing Co., Ltd. | Piezoelectric sounding body |
Also Published As
Publication number | Publication date |
---|---|
JPH0746879B2 (en) | 1995-05-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |