JP4174437B2 - Connectors and printed circuit boards - Google Patents
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- JP4174437B2 JP4174437B2 JP2004060178A JP2004060178A JP4174437B2 JP 4174437 B2 JP4174437 B2 JP 4174437B2 JP 2004060178 A JP2004060178 A JP 2004060178A JP 2004060178 A JP2004060178 A JP 2004060178A JP 4174437 B2 JP4174437 B2 JP 4174437B2
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Description
本発明は、対をなすコンタクトが誘電体に複数配列保持された高速差動信号用コネクタおよび対をなすスルーホールがプリント基板に複数配置された高速差動信号用プリント基板において対間の静電結合によるクロストークを防止する技術分野に属する。 The present invention provides a high-speed differential signal connector in which a plurality of pairs of contacts are held in a dielectric and a high-speed differential signal printed circuit board in which a plurality of through-holes are arranged in a printed circuit board. It belongs to the technical field of preventing crosstalk due to coupling.
従来、信号伝送線路上でのクロストークノイズを緩和して、信号伝送波形の劣化防止を図ることのできるコネクタとして以下のような例がある。
差動信号を伝送する複数の信号ピン（コネクタコンタクト）と、該コネクタコンタクトを保持するインシュレータ（保持誘電体）を有するコネクタにおいては、保持誘電体内部でコネクタコンタクト間の静電結合によるクロストークノイズが発生し、該ノイズが伝送信号の品質を劣化させ、高速信号伝送の実現に多大な悪影響を与える要因となっているので、これに対する改善策が講じられている。
Conventionally, there are the following examples of connectors that can reduce crosstalk noise on a signal transmission line and prevent deterioration of a signal transmission waveform.
In a connector having a plurality of signal pins (connector contacts) for transmitting a differential signal and an insulator (holding dielectric) for holding the connector contacts, crosstalk noise due to electrostatic coupling between the connector contacts inside the holding dielectric. And the noise deteriorates the quality of the transmission signal and has a great adverse effect on the realization of high-speed signal transmission.
その改善策は図７に示すように、差動信号伝送を行う２対のコネクタコンタクト１Ａ及び１Ｂ並びにコネクタコンタクト１Ｃ及び１Ｄの間に金属遮へい板６を置くことで、コネクタコンタクト相互の結合によるクロストークノイズの発生を防止している（例えば、特許文献１参照）。
As shown in FIG. 7, the improvement measures are as follows. By placing a metal shielding plate 6 between the two pairs of
また、同様の問題を有するプリント基板の場合には、図８に示すように信号スルーホール１１Ａ、１１Ｃ間、および１１Ｂ、１１Ｄ間にグランドスルーホール１１Ｅ、１１Ｆを設けていた（マイクロストリップラインの場合につき、例えば特許文献２参照）。
しかしながら、上記背景技術で述べた対策では、金属遮へい板を用いることで部品点数が増えるうえ、充分な遮へい効果を得られる大きさの金属板を入れるため、小型化に制約があり、更には、対をなすコンタクトの傍に金属板があるため、特性インピーダンスが変化し、外部回路との間でインピーダンス不整合を生じる等の問題があった。 However, in the measures described in the background art above, the number of parts is increased by using a metal shielding plate, and since a metal plate having a size that can obtain a sufficient shielding effect is included, there is a restriction on downsizing, and further, Since there is a metal plate beside the pair of contacts, there is a problem that the characteristic impedance changes and impedance mismatch occurs with the external circuit.
また、プリント基板の場合にはグランドスルーホール分だけスルーホールの加工が増えるうえ、特性インピーダンスに関しては、金属遮へい板の場合と同様の問題があった。 In the case of a printed circuit board, the number of through holes is increased by the amount corresponding to the ground through hole, and the characteristic impedance has the same problem as in the case of a metal shielding plate.
本発明は、上記従来技術の問題点に鑑みて、遮へい金属板やグランドスルーホールを用いないで、コンタクト対間或いは信号スルーホール対間の静電結合によるクロストークを抑制することを課題とするものである。 In view of the above-described problems of the prior art, an object of the present invention is to suppress crosstalk due to electrostatic coupling between contact pairs or signal through hole pairs without using a shielding metal plate or a ground through hole. Is.
本発明は、上記の課題を解決するため、以下の各手段構成を有する。
本発明の第１の構成は、ペアをなす２つのコンタクトで１対の差動信号用コネクタコンタクトを形成するペアコンタクトがペアをなす方向に対して横方向に間隔をあけて平行に並んで誘電体に保持されているペアコンタクトとペアコンタクトにおいて、異なるペアの斜め同士となるコンタクトの間それぞれの誘電体を、異なるペアの横同士となるコンタクトの間の誘電体の誘電率よりも大きい誘電率の誘電体とし、異なるペアの横同士のコンタクト間の静電結合度と異なるペアの斜め同士のコンタクト間の静電結合度とが同じになるようにしたことを特徴とするコネクタである。
In order to solve the above-described problems, the present invention has the following means configurations.
A first configuration of the present invention, a dielectric arranged in parallel at intervals in transverse pair contact to form two pair differential signal connector contacts of the contact forming a pair with respect to a direction forming a pair The dielectric constant between the paired contacts and the paired contacts held by the body is larger than the dielectric constant of the dielectric between the diagonal contacts of different pairs, and the dielectric constant between the lateral contacts of different pairs of the dielectric is a connector in which the electrostatic coupling between the contact of the oblique ends of the electrostatic coupling degree between different pairs between the contact of the lateral ends of different pairs, characterized in that as the same.
本発明の第２の構成は、ペアをなす２つのコンタクトで１対の差動信号用コネクタコンタクトを形成するペアコンタクトがペアをなす方向に対して横方向に間隔をあけて平行に並んで誘電体に保持されているペアコンタクトとペアコンタクトにおいて、異なるペアの横同士となるコンタクトの間それぞれの誘電体に空洞を設けるとともに、異なるペアの斜め同士となるコンタクトの間それぞれの誘電体を、異なるペアの斜め同士となるコンタクト間の静電結合度と異なるペアの横同士となるコンタクト間の静電結合度とが、同じになる誘電率の誘電体としたことを特徴とするコネクタである。
The second aspect of the present invention, a dielectric arranged in parallel at intervals in transverse pair contact to form two pair differential signal connector contacts of the contact forming a pair with respect to a direction forming a pair in pair contact the pair contact held in the body, different contact the lateral ends of the pair between each provided with a cavity in the dielectric, each of the dielectric between the contact that diagonally between different pairs, different electrostatic coupling between contacts that diagonally between the pair and the electrostatic coupling between the contact to be lateral to each other in different pairs, a connector being characterized in that the dielectric permittivity of making same.
本発明の第３の構成は、ペアをなす２つのコンタクトで１対の差動信号用コネクタコンタクトを形成するペアコンタクトがペアをなす方向に対して横方向に間隔をあけて平行に並んで誘電体に保持されているペアコンタクトとペアコンタクトにおいて、異なるペアの斜め同士となるコンタクトの間それぞれの誘電体に空洞を設けるとともに、異なるペアの横同士となるコンタクトの間それぞれの誘電体を、異なるペアの横同士のコンタクト間の静電結合度と異なるペアの斜め同士のコンタクト間の静電結合度とが、同じになる誘電率の誘電体としたことを特徴とするコネクタである。
A third configuration of the present invention, a dielectric arranged in parallel at intervals in transverse pair contact to form two pair differential signal connector contacts of the contact forming a pair with respect to a direction forming a pair in pair contact the pair contact held in the body, different contacts that diagonally between pairs between each provided with a cavity in the dielectric, each of the dielectric between the contact to be lateral to each other in different pairs, different The connector is characterized by a dielectric having a dielectric constant in which the degree of electrostatic coupling between the contacts of the pair of sides and the degree of electrostatic coupling between the pairs of diagonal contacts of the pair are the same .
以上のように、本発明ではペアをなす２つのコンタクトからなる組がペアをなす方向に対して横方向に間隔をあけて平行に並んでいる場合に、横同士のコンタクト間や斜め同士のコンタクト間の誘電体に空洞を設けたり、誘電率の異なる誘電体にしたりすることによって、横同士のコンタクト間の静電結合度と斜め同士のコンタクト間の静電結合度をできるだけ同じになるようにしているので、ペアをなすコンタクトに差動信号を伝送させた場合、平行するペアコンタクトのそれぞれに静電誘導によって生ずる誘導信号は横方向からによるものと斜め方向からによるものが大きさが同じで逆極性となるため相殺し合ってゼロに近くなり、平行するコンタクトペア間でのクロストークが抑制されることになる。
以上のことはプリント基板のスルーホールの場合についても同様である。
As described above, according to the present invention, when a pair of two contacts forming a pair is arranged in parallel with a gap in the transverse direction with respect to the pairing direction, the contacts between the lateral contacts or the diagonal contacts By providing cavities in the dielectric between them, or using dielectrics with different dielectric constants, the degree of electrostatic coupling between lateral contacts and the degree of electrostatic coupling between diagonal contacts should be as close as possible. Therefore, when a differential signal is transmitted to a pair of contacts, the magnitude of the induced signal generated by electrostatic induction at each parallel pair contact is the same from the lateral direction and from the diagonal direction. Since they have opposite polarities, they cancel each other and approach zero, and crosstalk between parallel contact pairs is suppressed.
The same applies to the case of through holes in a printed circuit board.
このように本発明では、空洞のみを設ける場合には部品点数は増えることなく、また、異なる誘電率の誘電体を用いる場合には部品点数は従来と同じであるが、金属遮へい板ではないため小型にすることができ、また、インピーダンス不整合の問題も生じないという効果がある。 As described above, in the present invention, the number of components does not increase when only the cavity is provided, and the number of components is the same as the conventional when using a dielectric having a different dielectric constant, but it is not a metal shielding plate. It is possible to reduce the size, and there is an effect that the problem of impedance mismatch does not occur.
本発明においては、コンタクト保持誘電体の横同士コンタクト間や、斜め同士コンタクト間に空洞を設けたり、誘電率の異なる誘電体を入れたり、或いは両者を組み合わせたものであるが、最良の形態は空洞を設けるのみでクロストークを抑制することである。
また、空洞を設けるにしても、誘電率の異なる誘電体を入れるにしても、保持誘電体或いはプリント基板成形時に同時成形或いは一体成形とするのが最良の実施方法である。
以下、本発明の実施例に到る参考例の説明である。
図１は、本発明を適用するコネクタの一例の斜視図と、その保持誘電体２の平行するコンタクトペアの横同士のコンタクト間の誘電体に空洞を設けた実施例の構成を示す図である。
２対のコネクタコンタクトを保持する保持誘電体２が均一の場合は、横同士のコネクタコンタクト間の静電結合度と斜め同士のコネクタコンタクト間の静電結合度とを比較した場合、横同士のコネクタコンタクト間の静電結合度の方が距離が近い分だけ大きいことに着目し、この横同士のコネクタコンタクト間の静電結合度を小さくし、斜め同士のコネクタコンタクト間の静電結合度の値に近づけるために、横同士のコネクタコンタクト間に空洞を設けて静電結合度を小さくすることを基本原理としている。
１対の差動信号用コネクタコンタクト１Ａ及び１Ｂと、該コネクタコンタクトがペアをなす方向に対して横方向に間隔を空けて平行に並んでいるもう１対のコネクタコンタクト１Ｃ及び１Ｄと、該コネクタコンタクト１Ａ、１Ｂ、１Ｃ及び１Ｄを保持する保持誘電体２を有する差動信号伝送用コネクタにおいて、横同士のコネクタコンタクト１Ａ及び１Ｃの間並びに同１Ｂ及び１Ｄの間に、それぞれ空洞３Ａ及び３Ｂを設けている。
空洞は、コンタクト間の方向で長くするにつれて静電結合度が小さくなっていくので、斜め同士のコンタクト間の静電結合度と同じになるような寸法に設定する。
図２は、図１の空洞の代わりに、横同士のコンタクト間の誘電体の一部を誘電率の小さい誘電体４Ａおよび４Ｂとした実施例の構成を示す図である。
この場合、誘電体の大きさと誘電率を選ぶことにより、横同士のコンタクト間の静電結合度を変えることができるので、斜め同士のコンタクト間の静電結合度と同じになるように設定する。
図６はペアをなす信号スルーホール１１Ａ、１１Ｂと１１Ｃ、１１Ｄに対し、横同士となるスルーホール１１Ａと１１Ｃの間および１１Ｂと１１Ｄの間にそれぞれ空洞３Ａ、空洞３Ｂを設けて、横同士のスルーホール間の静電結合度を斜め同士のスルーホール間の静電結合度に近づけるようにしたものである。
In the present invention, the contact holding dielectric is provided with a cavity between the lateral contacts, between the diagonal contacts, with a dielectric having a different dielectric constant, or a combination of both. It is to suppress crosstalk only by providing a cavity.
Even if a cavity is provided or a dielectric having a different dielectric constant is inserted, the best implementation method is simultaneous molding or integral molding during molding of the holding dielectric or the printed circuit board.
The following is a description of reference examples that lead to examples of the present invention.
FIG. 1 is a perspective view of an example of a connector to which the present invention is applied, and a configuration of an embodiment in which a cavity is provided in a dielectric between lateral contacts of a parallel contact pair of a holding dielectric 2. .
When the holding dielectric 2 that holds two pairs of connector contacts is uniform, when comparing the electrostatic coupling degree between the horizontal connector contacts and the electrostatic coupling degree between the diagonal connector contacts, Paying attention to the fact that the degree of electrostatic coupling between the connector contacts is larger by the closer distance, the electrostatic coupling degree between the connector contacts on the side is reduced, and the degree of electrostatic coupling between the diagonal connector contacts is reduced. In order to approach the value, the basic principle is to reduce the degree of electrostatic coupling by providing a cavity between the side connector contacts.
A pair of differential
Since the cavity has a smaller electrostatic coupling degree as it becomes longer in the direction between the contacts, the cavity is set to have the same size as the electrostatic coupling degree between the diagonal contacts.
FIG. 2 is a diagram showing a configuration of an embodiment in which a part of the dielectric between the side contacts is a dielectric 4A and 4B having a low dielectric constant instead of the cavity of FIG.
In this case, the degree of electrostatic coupling between the lateral contacts can be changed by selecting the size of the dielectric and the dielectric constant, so that the electrostatic coupling degree between the diagonal contacts is set to be the same. .
FIG. 6 shows that a pair of signal through holes 11A, 11B and 11C, 11D are provided with a cavity 3A and a cavity 3B between side holes 11A and 11C and between 11B and 11D, respectively. The degree of electrostatic coupling between through holes is made closer to the degree of electrostatic coupling between diagonal through holes.
図３は、本発明第1の構成の実施例で、斜め同士のコネクタコンタクト１Ａ及び１Ｄの間、並びに同１Ｂ及び１Ｃの間に保持誘電体２の誘電率よりも大きい誘電率の誘電体４Ｃを設けた実施例の構成を示す図である。FIG. 3 shows an embodiment of the first configuration of the present invention. Dielectric 4C having a dielectric constant larger than that of holding dielectric 2 between
これにより横同士のコンタクト間の静電結合度に近付けるようにするものである。Thus, the degree of electrostatic coupling between the contacts between the sides is brought closer.
図４は、本発明第２の構成の実施例で、横同士のコネクタコンタクト１Ａ及び１Ｃの間並びに同１Ｂ及び１Ｄの間に空洞３Ｃ及び３Ｄを、斜め同士のコネクタコンタクト１Ａ及び１Ｄの間並びに同１Ｂ及び１Ｃの間に誘電率を選んだ誘電体４Ｄを設けて横同士のコンタクト間の静電結合度と斜め同士のコンタクト間の静電結合度を近付けるようにした実施例の構成を示す図である。FIG. 4 shows an embodiment of the second configuration of the present invention, in which the cavities 3C and 3D are provided between the
図５は、本発明第３の構成の実施例で、横同士のコネクタコンタクト１Ａ及び１Ｃの間並びに同１Ｂ及び１Ｄの間に誘電率を選んだ誘電体４Ｅ及び４Ｆを、斜め同士のコネクタコンタクト１Ａ及び１Ｄの間並びに同１Ｂ及び１Ｃの間に空洞３Ｅを設けて横同士のコンタクト間の静電結合度と斜め同士のコンタクト間の静電結合度を近付けるようにした実施例の構成を示す図である。FIG. 5 shows an embodiment of the third configuration according to the present invention. Dielectrics 4E and 4F having a dielectric constant selected between the
１Ａ、１Ｂ、１Ｃ、１Ｄ コネクタコンタクト
２ 保持誘電体
３Ａ、３Ｂ、３Ｃ、３Ｄ、３Ｅ 空洞
４Ａ、４Ｂ、４Ｃ、４Ｄ、４Ｅ、４Ｆ 誘電体
５ インシュレータ
６ 金属遮へい板
７ コネクタコンタクト
８ ハウジング
９、１０ 基板
１１Ａ、１１Ｂ、１１Ｃ、１１Ｄ 信号スルーホール
１１Ｅ、１１Ｆ グランドスルーホール
１２ プリント基板
1A, 1B, 1C,
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004060178A JP4174437B2 (en) | 2004-03-04 | 2004-03-04 | Connectors and printed circuit boards |
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| JP2004060178A JP4174437B2 (en) | 2004-03-04 | 2004-03-04 | Connectors and printed circuit boards |
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| JP2005251552A JP2005251552A (en) | 2005-09-15 |
| JP4174437B2 true JP4174437B2 (en) | 2008-10-29 |
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| JP2009146949A (en) * | 2007-12-11 | 2009-07-02 | Disco Abrasive Syst Ltd | Wafer dividing method |
| CN104183959B (en) * | 2013-05-28 | 2017-09-22 | 中航光电科技股份有限公司 | Electric connector with high differential characteristic impedance |
| CN111740255A (en) * | 2020-07-03 | 2020-10-02 | 业成科技（成都）有限公司 | Electric connector and electronic equipment |
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