JPH0124977Y2 - - Google Patents
Info
- Publication number
- JPH0124977Y2 JPH0124977Y2 JP1981121910U JP12191081U JPH0124977Y2 JP H0124977 Y2 JPH0124977 Y2 JP H0124977Y2 JP 1981121910 U JP1981121910 U JP 1981121910U JP 12191081 U JP12191081 U JP 12191081U JP H0124977 Y2 JPH0124977 Y2 JP H0124977Y2
- Authority
- JP
- Japan
- Prior art keywords
- base
- cap
- input
- case
- recessed
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010897 surface acoustic wave method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
【考案の詳細な説明】
本考案は圧電デバイス、例えばSAWフイルタ
等を収納するケースに関する。[Detailed Description of the Invention] The present invention relates to a case for housing a piezoelectric device, such as a SAW filter.
従来、圧電デバイスをケース内に収納する場
合、ケース内に於いて前記デバイスを接続する端
子間の直達波を阻止し静電的、電磁的シールドを
行う為、以下の如き手法を用いるのが一般的であ
つた。 Conventionally, when a piezoelectric device is housed in a case, the following methods are generally used to prevent direct waves between the terminals connecting the device inside the case and provide electrostatic and electromagnetic shielding. It was spot on.
即ち、例を弾性表面波フイルタにとるならば、
第１図に示す如く圧電基板１に設けた入出力イン
タデイジタルトランスジユーサ電極２及び３の間
の基板上にシールド・パターン４を設け、これを
接地したり、第２図に示す如く圧電デバイスたる
フイルタ５を固定するベース６の表面とキヤツプ
７の天井との間隙ｈを極力小さくするか或は第３
図に示す如くキヤツプ７の天井に直達波阻止用の
導体ブロツク或は板８を固定するといつた手法が
用いられていた。 That is, if we take a surface acoustic wave filter as an example,
As shown in FIG. 1, a shield pattern 4 is provided on the substrate between the input/output interdigital transducer electrodes 2 and 3 provided on the piezoelectric substrate 1, and this is grounded, or as shown in FIG. Either minimize the gap h between the surface of the base 6 to which the barrel filter 5 is fixed and the ceiling of the cap 7, or
As shown in the figure, a method was used in which a conductor block or plate 8 for blocking direct waves was fixed to the ceiling of the cap 7.
しかしながら上記第１の手法に於いては入出力
インタデイジタルトランスジユーサ電極２，３の
間隔が充分になければ効果はなく、又第２の手法
にあつては入出力端子先端、配線等を考えればケ
ース７の天井とベース６の表面との間隙ｈには自
ずから限界があつた。 However, the first method described above is ineffective unless there is sufficient spacing between the input and output interdigital transducer electrodes 2 and 3, and the second method requires consideration of input/output terminal tips, wiring, etc. For example, the gap h between the ceiling of the case 7 and the surface of the base 6 naturally has a limit.
更に第３の手法はシールド部材８をキヤツプ７
の天井に取付ける工数に要する費用がケース全体
のコストからみて極めて高くなるという欠陥があ
つた。 Furthermore, a third method is to attach the shield member 8 to the cap 7.
The defect was that the man-hours required to attach the case to the ceiling were extremely high compared to the overall cost of the case.
本考案は上記の如き従来のシールド法の欠陥を
除去する為になされたものであつて、ベースを貫
通して設けた入出力端子の間について、前記ベー
スを密閉する接地した良導電体キヤツプの天井を
その製造工程に於いて凹陥せしめることによつて
前記入出力端子間の直達波を阻止する障壁とな
し、充分なシールド効果を有し、しかも量産に適
した安価な高周波デバイス用ケースを提供するこ
と目的とする。 The present invention was made to eliminate the defects of the conventional shielding method as described above, and between the input and output terminals provided through the base, a grounded cap of good conductivity is used to seal the base. By recessing the ceiling during the manufacturing process, it becomes a barrier to prevent direct waves between the input and output terminals, and provides a case for high frequency devices that has a sufficient shielding effect and is suitable for mass production and is inexpensive. The purpose is to do.
以下本考案を実施例に基づいて詳細に説明す
る。 The present invention will be described in detail below based on examples.
第４図は本考案の一実施例を示す断面図であ
る。 FIG. 4 is a sectional view showing an embodiment of the present invention.
本図に於いてベース６は金属板を圧縮成形等に
よつて成形したもので、入出力端子９及び１０は
ベース６の貫通孔１１及び１２に充填されたコバ
ー・ガラス１３によつて前記ベース６から絶縁さ
れる。前記ベース６の表面上、前記入出力端子９
及び１０の間には高周波デバイス、例ええば弾性
表面波フイルタ５が固定され、ボンデイング・ワ
イヤ１４，１５によつて前記端子９，１０の先端
と夫々接続されている。 In this figure, the base 6 is a metal plate formed by compression molding or the like, and the input/output terminals 9 and 10 are connected to the base by cover glass 13 filled in the through holes 11 and 12 of the base 6. 6. On the surface of the base 6, the input/output terminal 9
A high frequency device, for example a surface acoustic wave filter 5, is fixed between the terminals 9 and 10, and is connected to the tips of the terminals 9 and 10 by bonding wires 14 and 15, respectively.
一方前記ベースを覆うキヤツプ７は金属板をプ
レスしたものであつてその縁部は前記ベース６周
縁部とハンダ或は冷間圧接等の手段で密封され
る。 On the other hand, the cap 7 covering the base is made of a pressed metal plate, and its edge is sealed with the peripheral edge of the base 6 by means such as soldering or cold pressure welding.
而して前記キヤツプ７の天井にその製造工程に
於いて凹陥１６を付与したものである。 A recess 16 is added to the ceiling of the cap 7 during the manufacturing process.
斯くすることによつて前記入出力端子９と１０
との間を伝搬する直達波は前記キヤツプの凹陥に
て吸収され、ここで発生する電流は例えばケー
ス・アースを介して接地に落されるので充分なシ
ールド効果を得ることができる。 By doing so, the input/output terminals 9 and 10
A direct wave propagating between the cap and the cap is absorbed by the recess of the cap, and the current generated here is dropped to the ground via, for example, the case ground, so that a sufficient shielding effect can be obtained.
又、シールド効果を更に一層大きくする為には
第５図に示す如くベース６の高周波デバイス設置
部分に凹部１７を設け前記キヤツプ７天井の凹陥
部１６をこれに嵌入せしめる如くすることによつ
て前記入出力端子９と１０との間の見通しを完全
に遮ぎるようにしてもよい。 In order to further increase the shielding effect, as shown in FIG. 5, a recess 17 is provided in the high frequency device installation part of the base 6, and the recess 16 on the ceiling of the cap 7 is fitted into this recess. The line of sight between the input/output terminals 9 and 10 may be completely blocked.
斯る形状のベースは圧縮成形によつて容易に製
造可能である。 A base having such a shape can be easily manufactured by compression molding.
尚、本考案にいかなる形のケースにも適用可能
であることはいうまでもなく、第６図に示す如く
例えば円形のケースのキヤツプの天井に十字形の
陥没部１８を設け、各端子１９乃至２２相互間の
シールドを図るようにすることも効果的である。 It goes without saying that the present invention can be applied to cases of any shape; for example, as shown in FIG. It is also effective to provide shielding between the two.
本考案のケースは以上説明した如く構成するの
で極めて安価に入出力端子間の電磁的、静電的シ
ールドが充分に行なわれるから収納した高周波デ
バイスの特性、例えばフイルタであるならば、そ
の波形の乱れや減衰量の低下等を防止する上で著
しい効果を有するものである。 Since the case of the present invention is constructed as explained above, it is extremely inexpensive and provides sufficient electromagnetic and electrostatic shielding between the input and output terminals. This has a remarkable effect in preventing disturbances and reductions in attenuation.
第１図乃至第３図は夫々従来のシールド法を示
す平面図或は断面図、第４図は本考案のシールド
を適用した圧電デバイス用ケースの一実施例、第
５図及び第６図は夫々本考案の他の実施例を示す
断面図及び一部破断平面図である。
５……圧電デバイス、６……ベース、７……良
導電体キヤツプ、９，１０，１８，１９，２０，
２１及び１２……入出力端子、１６及び１８……
キヤツプの凹陥、１７……ベースの凹陥。
Figures 1 to 3 are plan views and cross-sectional views showing conventional shielding methods, Figure 4 is an example of a case for a piezoelectric device to which the shield of the present invention is applied, and Figures 5 and 6 are FIG. 7 is a sectional view and a partially cutaway plan view showing other embodiments of the present invention, respectively. 5... Piezoelectric device, 6... Base, 7... Good conductor cap, 9, 10, 18, 19, 20,
21 and 12...input/output terminals, 16 and 18...
A dent in the cap, 17...a dent in the base.
Claims (1)
する如く固定し、前記圧電デバイス周辺に前記
ベースを気密貫通する入出力端子を設けるとと
共にこれらを接地した良導電体キヤツプによつ
て前記ベースとの間で気密封止するケースに於
いて、前記接地した良導電体キヤツプの天井を
凹陥せしめると共に該凹陥部を前記入出力端子
相互の見通しを妨げるよう前記圧電デバイス主
面近傍まで垂下せしめたことを特徴とする圧電
デバイス用ケース。 (2) 前記ベースの圧電デバイス固定面を前記ベー
スの入出力端子突出部より凹陥せしめ該凹陥部
に前記接地した良導電体キヤツプの凹陥部を嵌
入せしめたことを特徴とする実用新案登録請求
の範囲(1)記載の圧電デバイス用ケース。[Claims for Utility Model Registration] (1) A piezoelectric device is fixed to a base plane so that its main surfaces are parallel to each other, and input/output terminals are provided around the piezoelectric device to pass through the base in an airtight manner, and these are also grounded. In a case where the cap is airtightly sealed with the base by a conductive cap, the ceiling of the grounded good conductive cap is recessed, and the piezoelectric cap is recessed so that the recessed portion prevents mutual line of sight between the input and output terminals. A case for a piezoelectric device characterized by hanging down close to the main surface of the device. (2) A utility model registration claim characterized in that the piezoelectric device fixing surface of the base is recessed from the input/output terminal protrusion of the base, and the recess of the grounded good conductive cap is fitted into the recess. Case for piezoelectric devices listed in range (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12191081U JPS5828424U (en) | 1981-08-17 | 1981-08-17 | Case for high frequency devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12191081U JPS5828424U (en) | 1981-08-17 | 1981-08-17 | Case for high frequency devices |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5828424U JPS5828424U (en) | 1983-02-24 |
| JPH0124977Y2 true JPH0124977Y2 (en) | 1989-07-27 |
Family
ID=29915847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12191081U Granted JPS5828424U (en) | 1981-08-17 | 1981-08-17 | Case for high frequency devices |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5828424U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329247B2 (en) * | 1972-05-22 | 1978-08-19 | ||
| JPS5413793A (en) * | 1977-07-04 | 1979-02-01 | Toshiba Corp | Elastic surface wave device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329247U (en) * | 1976-08-20 | 1978-03-13 | ||
| JPS5576526U (en) * | 1978-11-21 | 1980-05-27 | ||
| JPS5812474Y2 (en) * | 1979-01-25 | 1983-03-09 | 三菱電機株式会社 | electrical equipment case |
-
1981
- 1981-08-17 JP JP12191081U patent/JPS5828424U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5329247B2 (en) * | 1972-05-22 | 1978-08-19 | ||
| JPS5413793A (en) * | 1977-07-04 | 1979-02-01 | Toshiba Corp | Elastic surface wave device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5828424U (en) | 1983-02-24 |
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