JPH08172257A - Printed-circuit board - Google Patents

Printed-circuit board

Info

Publication number
JPH08172257A
JPH08172257A JP33395794A JP33395794A JPH08172257A JP H08172257 A JPH08172257 A JP H08172257A JP 33395794 A JP33395794 A JP 33395794A JP 33395794 A JP33395794 A JP 33395794A JP H08172257 A JPH08172257 A JP H08172257A
Authority
JP
Japan
Prior art keywords
terminals
component
circuit board
printed circuit
corners
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
JP33395794A
Other languages
Japanese (ja)
Inventor
Masami Nakane
正見 中根
Kuniaki Azuma
邦秋 東
Shiro Okamoto
志郎 岡本
Toshio Kagawa
敏男 香川
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.)
Horiba Ltd
Original Assignee
Horiba Ltd
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 Horiba Ltd filed Critical Horiba Ltd
Priority to JP33395794A priority Critical patent/JPH08172257A/en
Publication of JPH08172257A publication Critical patent/JPH08172257A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/11Printed elements for providing electric connections to or between printed circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341Surface mounted components
    • H05K3/3431Leadless components

Landscapes

  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Abstract

PURPOSE: To provide a printed-circuit board in which a component is not dislocated, in which a solder bridge is not generated, in which the component can be soldered and by which a desired alignment effect can be obtained. CONSTITUTION: In a printed-circuit board 5, a surface mounting component 1 which comprises a plurality of terminals 2a, 2b is mounted. In the printed- circuit board, every area of pad parts 6a1 to 6a4 corresponding to the terminals 2a installed at four corners of the component 1 is made larger than every board bonding area of the terminals 2a, and every area of pad parts 6b1 to 6b4 corresponding to the terminals 2b installed in parts other than the four corners of the component 1 is made smaller than every board bonding area of the terminals 2b.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、プリント基板に関
し、特に、そのパッド部形状に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board, and more particularly to a pad portion shape thereof.

【0002】[0002]

【従来の技術】従来、電子回路の部品をプリント基板に
装着する方式として、プリント基板の面部に形成された
複数のパッド部に、電子部品の各接続端子を、溶融した
はんだに浸漬させてはんだ付けするフローはんだ付け方
式と、パッド部にクリームはんだを塗布し、その上に部
品を実装し、リフロー炉ではんだを溶融させて各パッド
部に各接続端子をはんだ付けするリフローハンダ方式が
ある。
2. Description of the Related Art Conventionally, as a method of mounting electronic circuit components on a printed circuit board, soldering is performed by immersing each connection terminal of the electronic component in a molten solder on a plurality of pads formed on the surface of the printed circuit board. There are a flow soldering method in which the solder paste is applied and a reflow solder method in which cream solder is applied to the pad portion, components are mounted on the pad solder, and the solder is melted in a reflow furnace to solder each connection terminal to each pad portion.

【0003】ところで、前記電子部品の中には、図3に
示すように、実装される部品1の両側に、大きさが互い
に等しく、中心間距離(中心ピッチ)が等しい複数の端
子2a,2bを設けたものがある。このように複数の端
子2a,2bをプリント基板に実装するため、従来にお
いては、部品1の端子2a,2bのタイプサイズに合致
したパッド部設計を行い、図4に示すようなパッド部3
をプリント基板4に形成していた。すなわち、図4にお
いて、wをパッド部3の幅、pを中心ピッチとすると
き、前記寸法wは、前記端子2a,2bの幅Wと等しい
かこれより大きくなるように、また、前記寸法pは端子
間ピッチPと等しくなるように設定されていた。
By the way, among the electronic parts, as shown in FIG. 3, a plurality of terminals 2a, 2b having the same size and the same center-to-center distance (center pitch) are provided on both sides of the part 1 to be mounted. There is one that has. In order to mount the plurality of terminals 2a and 2b on the printed circuit board in this way, conventionally, a pad portion design matching the type size of the terminals 2a and 2b of the component 1 is performed, and the pad portion 3 as shown in FIG.
Was formed on the printed circuit board 4. That is, in FIG. 4, when w is the width of the pad portion 3 and p is the center pitch, the dimension w is equal to or larger than the width W of the terminals 2a and 2b, and the dimension p is larger than the width W. Was set to be equal to the terminal pitch P.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、部品の
小型化が進む中で、実装部品1のチャッキング精度や搭
載精度を考えた場合、1ピッチ(=P)近くずれ、所謂
部品ずれが生ずる可能性がある。これを回避する方法と
して、例えば、CCDカメラを用いて画像認識し、これ
に基づいて処理する方法があるが、この種の装置はかな
り高価であるといった問題がある。
However, in consideration of the chucking accuracy and mounting accuracy of the mounting component 1 while the miniaturization of the components is progressing, a deviation of nearly 1 pitch (= P), that is, a so-called component deviation may occur. There is a nature. As a method of avoiding this, for example, there is a method of recognizing an image using a CCD camera and processing based on this, but there is a problem that this kind of device is considerably expensive.

【0005】これに対して、前記パッド部間ピッチpを
一定にしたままで、パッド部42の形状を前記端子端子
2a,2bの形状より大きく設定したり、逆に小さく設
定したりすることが考えられているが、前記形状を単に
大きくした場合、パッド部間の距離(図4中の符号d)
が短くなるため、はんだブリッジが生じやすくなるとい
う問題があり、前記形状を単に小さくした場合には、フ
ィレットのできる面積が小さくなり、はんだによる表面
張力が小さくなるため、セルフアライメント(自己整
合)効果を十分に得ることができず、実装部品のアライ
メント効果が低下するという問題がある。
On the other hand, with the pitch p between the pad portions kept constant, the shape of the pad portion 42 may be set larger than the shape of the terminal terminals 2a, 2b, or conversely set smaller. It is considered, but when the shape is simply increased, the distance between the pad portions (reference numeral d in FIG. 4)
However, if the shape is simply reduced, the area where fillets can be formed is reduced and the surface tension due to solder is reduced, resulting in a self-alignment effect. Cannot be sufficiently obtained, and there is a problem that the alignment effect of the mounted components is reduced.

【0006】この発明は、上述の事柄に留意してなされ
たもので、部品ずれを生じたり、はんだブリッジを生じ
たりすることなく、部品をはんだ付けでき、しかも所望
のセルフアライメント効果を得ることができるプリント
基板を提供することを目的としている。
The present invention has been made in consideration of the above matters, and it is possible to solder components without causing component misalignment or solder bridge, and to obtain a desired self-alignment effect. It is intended to provide a printed circuit board that can be manufactured.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するた
め、この発明は、複数の端子を有する表面実装部品を実
装するプリント基板において、前記部品の4隅に設けら
れる端子に対応するパッド部の面積を当該端子の基板接
合面積より大きくする一方、部品の4隅以外に設けられ
ている端子に対応するパッド部の面積を当該端子の基板
接合面積より小さくしたことを特徴としている。
In order to achieve the above object, the present invention provides a printed circuit board on which a surface mount component having a plurality of terminals is mounted, and a pad portion corresponding to the terminals provided at the four corners of the component. The area is made larger than the board bonding area of the terminal, while the area of the pad portion corresponding to the terminals provided at other than the four corners of the component is made smaller than the board bonding area of the terminal.

【0008】[0008]

【作用】上記のように構成されたプリント基板において
は、部品の4隅の端子に対応するパッド部を大きくして
も、パッド部間の距離が小さくなることがないので、は
んだブリッジを生ずることがない。そして、前記端子と
パッド部との間に大きな面積のフィレットを形成するこ
とができるので、大きなセルフアライメント効果が得ら
れる。また、高価な装置を用いなくても部品ずれを効果
的に低減することができる。
In the printed circuit board configured as described above, even if the pads corresponding to the terminals at the four corners of the component are enlarged, the distance between the pads does not decrease, so that a solder bridge is generated. There is no. Since a fillet having a large area can be formed between the terminal and the pad portion, a large self-alignment effect can be obtained. Further, it is possible to effectively reduce misalignment of parts without using an expensive device.

【0009】[0009]

【実施例】図1および図2は、この発明の一実施例を示
す。図1において、5はプリント基板で、その平面に
は、例えば、図3に示すような実装部品1の端子2a,
2bに対応するようにして、例えば8つのパッド部6a
1 〜6a4 ,6b1 〜6b4が形成されている。すなわ
ち、前記部品1の4隅に設けられる端子2aに対応する
4つのパッド部6a1 〜6a4 の面積を前記端子2aの
基板接合面積より大きくする一方、部品1の4隅以外に
設けられている端子2bに対応するパッド部6b1 〜6
4 の面積を前記端子2bの基板接合面積より小さくし
ている。
1 and 2 show an embodiment of the present invention. In FIG. 1, reference numeral 5 denotes a printed circuit board, on the plane of which, for example, terminals 2a of the mounting component 1 as shown in FIG.
2b, for example, eight pad portions 6a
1 to 6a 4 and 6b 1 to 6b 4 are formed. That is, while the four areas of the pad portion 6a 1 ~6A 4 for a pin 2a provided on the four corners of the component 1 greater than the substrate bonding area of the terminals 2a, provided in addition to the four corners of the component 1 Pad portions 6b 1 to 6 corresponding to the existing terminals 2b
The area of b 4 is made smaller than the substrate bonding area of the terminal 2b.

【0010】より具体的には、例えば、部品1の中心位
置に対応するプリント基板5上の中心位置Oを(0,
0)という座標で表すとき、前記8個のパッド部6
1 ,6a2 ,6a3 ,6a4 ,6b1 ,6b2 ,6b
3 ,6b4 の中心位置(図中、×で示す)の座標は、そ
れぞれ、(1.55,0.9),(−1.55,0.
9),(−1.55,−0.9),(1.55,0.
9),(0.4,0.9),(−0.4,−0.9),
(−0.4,−0.9),(0.4,−0.9)と表さ
れる。また、4隅の端子2aに対応する4つのパッド部
6a1 ,6a2 ,6a3 ,6a4 の大きさは、1.0m
m×1.0mmで、正方形に形成され、適宜面取りが形
成されている。そして、他の端子2bに対応する4つの
パッド部6b1 ,6b2 ,6b3 ,6b4 の大きさは、
0.3mm×1.0mmで長方形に形成されている。さ
らに、隣接するパッド部の間隔dは、互いに等しく、
0.5mmである。
More specifically, for example, the central position O on the printed circuit board 5 corresponding to the central position of the component 1 is (0,
When represented by coordinates 0), the eight pad portions 6
a 1 , 6a 2 , 6a 3 , 6a 4 , 6b 1 , 6b 2 , 6b
The coordinates of the center positions of 3 and 6b 4 (indicated by x in the figure) are (1.55, 0.9), (−1.55, 0.
9), (-1.55, -0.9), (1.55, 0.
9), (0.4, 0.9), (-0.4, -0.9),
It is expressed as (-0.4, -0.9), (0.4, -0.9). In addition, the size of the four pad portions 6a 1 , 6a 2 , 6a 3 , 6a 4 corresponding to the terminals 2a at the four corners is 1.0 m.
It is m × 1.0 mm, formed in a square shape, and appropriately chamfered. And the size of the four pad portions 6b 1 , 6b 2 , 6b 3 , 6b 4 corresponding to the other terminals 2b is
It has a rectangular shape of 0.3 mm × 1.0 mm. Further, the distance d between the adjacent pad portions is equal to each other,
It is 0.5 mm.

【0011】図2は、上記構成のプリント基板1のパッ
ド部6a1 〜6b4 に、端子2a,2bをはんだ付けし
て、部品1を実装した状態を示す縦断面図である。この
図において、7ははんだのフィレット部である。
[0011] Figure 2 is a pad portion 6a 1 ~6b 4 of the printed circuit board 1 having the above configuration, the terminal 2a, 2b and soldering, is a longitudinal sectional view showing a state in which mounting components 1. In this figure, 7 is a solder fillet.

【0012】上述のように、複数の端子2a,2bを有
する部品1を実装するプリント基板5において、前記部
品1の4隅に設けられる端子2aに対応するパッド部6
1〜6a4 の面積を前記端子2aの基板接合面積より
大きくする一方、部品1の4隅以外に設けられている端
子2bに対応するパッド部6b1 〜6b4 の面積を前記
端子2bの基板接合面積より小さくしたことにより、パ
ッド部間の距離dが小さくなることがないので、従来と
異なり、はんだブリッジを生ずることがない。
As described above, in the printed board 5 on which the component 1 having the plurality of terminals 2a and 2b is mounted, the pad portions 6 corresponding to the terminals 2a provided at the four corners of the component 1 are provided.
The areas of a 1 to 6a 4 are made larger than the board bonding area of the terminal 2a, while the areas of the pad portions 6b 1 to 6b 4 corresponding to the terminals 2b provided at other than the four corners of the component 1 are set to the areas of the terminals 2b. Since the distance d between the pad portions does not become smaller by making the area smaller than the board bonding area, a solder bridge does not occur unlike the conventional case.

【0013】そして、図2に示すように、各端子2a.
2bとパッド部6a1 〜6b4 との間に大きな面積のフ
ィレット7を形成することができるので、大きなセルフ
アライメント効果が得られる。より詳しくは、パッド部
6a1 〜6b4 に塗着されたクリームはんだが、その上
に実装部品1を載せて加熱される際(リフロー時)に
は、部品1の4隅の端子2aにおいては、図1において
矢印Aで示すように、実装部品1に対して表面張力が働
き、しかも、パッド部6a1 〜6a4 の面積が従来より
も大きくなっていることから、その表面張力は大きく、
強力なセルフアライメント効果が得られるのである。し
たがって、部品ずれを生じたりすることが大幅に低減さ
れるので、従来と異なり、高価な装置を用いなくても部
品ずれを効果的に低減することができる。
Then, as shown in FIG. 2, each terminal 2a.
It is possible to form the fillet 7 of large area between 2b and the pad portion 6a 1 ~6b 4, a large self-alignment effect can be obtained. More specifically, when the cream solder applied to the pad portions 6a 1 to 6b 4 is heated with the mounting component 1 placed thereon (at the time of reflow), the terminals 2a at the four corners of the component 1 are As shown by the arrow A in FIG. 1, the surface tension acts on the mounting component 1, and since the area of the pads 6a 1 to 6a 4 is larger than the conventional one , the surface tension is large.
A strong self-alignment effect can be obtained. Therefore, the occurrence of component misalignment is significantly reduced, and unlike conventional cases, component misalignment can be effectively reduced without using an expensive device.

【0014】なお、上述の実施例においては、部品1が
8個の端子を持っているが、この発明はこれに限られる
ものではないことは言うまでもない。また、上述におい
て例示した数値に限定されるものではないことは勿論で
ある。さらに、この発明は、部品をリフローはんだによ
り取り付ける場合に好適であるが、これに限られるもの
ではなく、はんだブリッジを低減しつつセルフアライメ
ント効果を引き出すことができるので、実装部品のはん
だ付け一般に広く用いることができる。
Although the component 1 has eight terminals in the above embodiment, it goes without saying that the present invention is not limited to this. Further, it goes without saying that the numerical values are not limited to those exemplified above. Furthermore, although the present invention is suitable for attaching components by reflow soldering, the present invention is not limited to this, and it is possible to bring out the self-alignment effect while reducing solder bridges. Can be used.

【0015】[0015]

【発明の効果】以上説明したように、この発明によれ
ば、部品ずれを生じたり、はんだブリッジを生じたりす
ることなく、部品をはんだ付けでき、しかも所望のセル
フアライメント効果を得ることができる。
As described above, according to the present invention, it is possible to solder components without causing misalignment of components or solder bridges, and it is possible to obtain a desired self-alignment effect.

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

【図1】この発明のプリント基板の一例を部分的に示す
平面図である。
FIG. 1 is a plan view partially showing an example of a printed circuit board according to the present invention.

【図2】前記プリント基板に部品を実装したときの状態
を示す縦断面図ある。
FIG. 2 is a vertical cross-sectional view showing a state in which components are mounted on the printed circuit board.

【図3】実装部品の一例を示す平面図である。FIG. 3 is a plan view showing an example of mounted components.

【図4】従来のプリント基板を部分的に示す平面図であ
る。
FIG. 4 is a plan view partially showing a conventional printed circuit board.

【符号の説明】[Explanation of symbols]

1…部品、2a,2b…端子、5…プリント基板、6a
1 〜6a4 , 6b1 〜6b4 …パッド部。
DESCRIPTION OF SYMBOLS 1 ... Component, 2a, 2b ... Terminal, 5 ... Printed circuit board, 6a
1 ~6a 4, 6b 1 ~6b 4 ... pad portion.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 香川 敏男 京都府京都市南区吉祥院宮の東町2番地 株式会社堀場製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Kagawa 2 Higashicho, Kichijoin Miya, Minami-ku, Kyoto-shi, Kyoto

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 複数の端子を有する表面実装部品を実装
するプリント基板において、前記部品の4隅に設けられ
る端子に対応するパッド部の面積を当該端子の基板接合
面積より大きくする一方、部品の4隅以外に設けられて
いる端子に対応するパッド部の面積を当該端子の基板接
合面積より小さくしたことを特徴とするプリント基板。
1. In a printed circuit board on which a surface mount component having a plurality of terminals is mounted, the areas of the pad portions corresponding to the terminals provided at the four corners of the component are made larger than the board bonding area of the terminal, and A printed circuit board, wherein the area of a pad portion corresponding to a terminal provided at a position other than the four corners is smaller than the board bonding area of the terminal.
JP33395794A 1994-12-17 1994-12-17 Printed-circuit board Pending JPH08172257A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33395794A JPH08172257A (en) 1994-12-17 1994-12-17 Printed-circuit board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33395794A JPH08172257A (en) 1994-12-17 1994-12-17 Printed-circuit board

Publications (1)

Publication Number Publication Date
JPH08172257A true JPH08172257A (en) 1996-07-02

Family

ID=18271883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33395794A Pending JPH08172257A (en) 1994-12-17 1994-12-17 Printed-circuit board

Country Status (1)

Country Link
JP (1) JPH08172257A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003347713A (en) * 2002-05-28 2003-12-05 Toa Corp Board for electronic circuit
WO2022169100A1 (en) * 2021-02-02 2022-08-11 삼성전자 주식회사 Printed circuit board, and electronic device including printed circuit board

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003347713A (en) * 2002-05-28 2003-12-05 Toa Corp Board for electronic circuit
WO2022169100A1 (en) * 2021-02-02 2022-08-11 삼성전자 주식회사 Printed circuit board, and electronic device including printed circuit board

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