JP3471377B2 - Electronic component soldering method - Google Patents
Electronic component soldering methodInfo
- Publication number
- JP3471377B2 JP3471377B2 JP27840492A JP27840492A JP3471377B2 JP 3471377 B2 JP3471377 B2 JP 3471377B2 JP 27840492 A JP27840492 A JP 27840492A JP 27840492 A JP27840492 A JP 27840492A JP 3471377 B2 JP3471377 B2 JP 3471377B2
- Authority
- JP
- Japan
- Prior art keywords
- electronic component
- solder
- circuit board
- printed circuit
- solder coating
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3421—Leaded components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
Landscapes
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
【発明の詳細な説明】
【0001】
【産業上の利用分野】本発明は、プリント基板の電極上
に形成された半田プリコート部に電子部品を半田付けす
る電子部品の半田付け方法に関するものである。
【0002】
【従来の技術】QFP(Quad Flat Pack
age)やSOP(Small Outline Pa
ckage)などのリードを有する電子部品をプリント
基板の電極に半田付けするための手段として、電極にメ
ッキ手段や半田レベラ手段により半田コーティング部を
形成することが知られている。図5は、半田コーティン
グ部が形成された従来のプリント基板に電子部品を搭載
している様子を示している。プリント基板1の上面には
電極3が形成されており、電極3上には半田コーティン
グ部4が形成されている。電子部品Pのモールド体Mか
らは多数本のリードLが延出している。この電子部品P
をプリント基板1に搭載するにあたっては、移載ヘッド
11のノズル12にモールド体Mを真空吸着し、リード
Lを半田コーティング部4に位置合わせしたうえで、ノ
ズル12を下降させてリードLの下端部を半田コーティ
ング部4に着地させる。このようにして電子部品Pが搭
載されたプリント基板1は、加熱炉へ送られて加熱さ
れ、半田コーティング部4が溶融固化することによりリ
ードLは電極3に半田付けされる。
【0003】
【発明が解決しようとする課題】ところが半田コーティ
ング部4の断面形状は図示するように円弧状であるた
め、リードLを着地させた場合に、同図鎖線で示すよう
にリードLが半田コーティング部4から横方向に位置ず
れして滑り落ちやすいという問題点があった。このよう
にリードLが半田コーティング部4から滑り落ちてしま
うと、半田コーティング部4を加熱炉で溶融させてもリ
ードLを電極3に半田付けできないこととなる。
【0004】そこで本発明は、電子部品が半田コーティ
ング部から滑り落ちるのを防止できる電子部品の半田付
け方法を提供することを目的とする。
【0005】
【課題を解決するための手段】このために本発明は、上
面に回路パターンを形成し、この回路パターンの先端部
に並設された電極上に半田コーティング部を形成したプ
リント基板に電子部品を半田付けする電子部品の半田付
け方法であって、前記電極のうち、一部の電極に半田コ
ーティング部に替えてクリーム半田を塗布したものであ
る。
【0006】
【作用】上記構成によれば、電子部品をプリント基板に
搭載すると、電子部品の電極の一部はクリーム半田に着
地し、このクリーム半田に貼着されるので、電子部品の
電極が半田コーティング部から滑り落ちるのは阻止さ
れ、半田コーティング部上に確実に搭載して半田付けす
ることができる。
【0007】
【実施例】次に図面を参照しながら本発明の実施例を説
明する。
【0008】図1は電子部品をプリント基板に搭載中の
斜視図である。図5に示す従来のものと同一部品には同
一符号を付している。プリント基板1の上面には回路パ
ターン2が形成されており、その先端部には電極3が4
方向に四角形に形成されている。電極3は4方向にそれ
ぞれ7個ずつ合計28個並設して形成されている。この
うち、符号aで示す中央部の5個の電極3には半田コー
ティング部4が形成されており、また両端部の電極3に
は半田コーティング部4に替えてクリーム半田5が塗布
されている。移載ヘッド11は移動テーブル13に保持
されており、移動テーブル13が駆動することによりX
方向やY方向に移動する。
【0009】図3は各列の最端部の電極3上にクリーム
半田5を塗布している様子を示している。プリント基板
1の各列の中央の5個の電極3には、予め半田コーティ
ング部4が形成されている。本実施例では、ディスペン
サ10のノズル11からクリーム半田5を吐出して電極
3上に塗布するが、スクリーン印刷装置により電極3上
にクリーム半田5を塗布することもできる。
【0010】このプリント基板1は上記のような構成よ
り成り、次に電子部品Pの搭載方法を説明する。図1に
おいて、移動テーブル13が駆動することにより、移載
ヘッド11はX方向やY方向に移動して、パーツフィー
ダ(図外)に備えられた電子部品Pをノズルに真空吸着
してピックアップする。次に移載ヘッド11はプリント
基板1の上方へ移動し、そこでノズル12が下降するこ
とにより、リードLを半田コーティング部4とクリーム
半田5に着地させてプリント基板1に搭載する。
【0011】図2はリードLを半田コーティング部4と
クリーム半田5に搭載中の正面図である。図示するよう
に、モールド体Mから多数本延出するリードLのうち中
央の5個のリードLは半田コーティング部4に着地し、
両端部のリードLはクリーム半田5に着地する(同図鎖
線参照)。半田コーティング部4の上面は円弧状であ
り、リードLは滑り落ちやすいが、クリーム半田5は貼
着力を有するのでリードLはこれに貼着される。したが
って電子部品Pが横方向に位置ずれして半田コーティン
グ部4から滑り落ちることはなく、確実に着地できる。
次にこのプリント基板1は加熱炉へ送られ、半田コーテ
ィング部4,クリーム半田5が加熱処理されることによ
り、図4に示すようにリードLは電極3に半田付けされ
る。
【0012】本発明は上記実施例に限定されないのであ
って、例えば上記実施例では、電極列のうちの両端部の
電極にクリーム半田5を塗布しているが、クリーム半田
5を塗布する電極は中央部の電極でもよいものである。
【0013】
【発明の効果】以上説明したように本発明は、回路パタ
ーンの先端部に並設された電極のうち、一部の電極に半
田コーティング部に替えてクリーム半田を塗布している
ので、クリーム半田の貼着力により、半田コーティング
部に着地した電子部品がこれから滑り落ちることなく、
電子部品を電極に確実に半田付けできる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of soldering an electronic component to a solder precoat formed on an electrode of a printed circuit board .
And a method for soldering electronic components . 2. Description of the Related Art QFP (Quad Flat Pack)
age) or SOP (Small Outline Pa)
As a means for soldering an electronic component having a lead, such as a cage, to an electrode of a printed circuit board, it is known to form a solder coating portion on the electrode by plating means or solder leveler means. FIG. 5 shows a state in which electronic components are mounted on a conventional printed circuit board on which a solder coating portion is formed. An electrode 3 is formed on the upper surface of the printed board 1, and a solder coating 4 is formed on the electrode 3. Many leads L extend from the mold body M of the electronic component P. This electronic component P
When mounting on the printed circuit board 1, the mold body M is vacuum-sucked to the nozzle 12 of the transfer head 11, the lead L is aligned with the solder coating portion 4, and then the nozzle 12 is lowered to lower the lower end of the lead L. The part lands on the solder coating part 4. The printed circuit board 1 on which the electronic components P are mounted in this manner is sent to a heating furnace where it is heated, and the solder coating 4 is melted and solidified, so that the leads L are soldered to the electrodes 3. However, since the cross-sectional shape of the solder coating portion 4 is arcuate as shown in the drawing, when the lead L lands, when the lead L lands, as shown by the chain line in FIG. There is a problem that the position is shifted from the solder coating portion 4 in the lateral direction and slips easily. If the lead L slides down from the solder coating 4 in this manner, the lead L cannot be soldered to the electrode 3 even if the solder coating 4 is melted in a heating furnace. Accordingly, the present invention provides a method for soldering an electronic component which can prevent the electronic component from slipping off from a solder coating .
It is intended to provide a method for refrigeration . [0005] According to an aspect of the present invention To this end, the upper
A circuit pattern is formed on the surface, and the tip of this circuit pattern
The solder coating part is formed on the electrodes arranged side by side
Soldering electronic components to the printed circuit board
A method of applying cream solder to some of the electrodes instead of the solder coating. According to the above arrangement, when the electronic component is mounted on the printed circuit board, a part of the electrodes of the electronic component lands on the cream solder and is attached to the cream solder .
The electrode is sliding off the solder coating portion is prevented, it is soldered to <br/> isosamples securely mounted on Handa coating unit. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an electronic component being mounted on a printed circuit board. The same parts as those of the conventional one shown in FIG. 5 are denoted by the same reference numerals. A circuit pattern 2 is formed on the upper surface of the printed circuit board 1, and four electrodes 3
It is formed in a square in the direction. A total of 28 electrodes 3 are formed side by side, 7 in each of the four directions. Of these, solder coating portions 4 are formed on the five central electrodes 3 indicated by reference symbol a, and cream solder 5 is applied to the electrodes 3 at both ends instead of the solder coating portions 4. . The transfer head 11 is held by a moving table 13, and the moving table 13
Move in the direction or Y direction. FIG. 3 shows a state in which cream solder 5 is applied to the electrode 3 at the end of each row. A solder coating 4 is formed in advance on the center five electrodes 3 of each row of the printed circuit board 1. In this embodiment, the cream solder 5 is discharged from the nozzle 11 of the dispenser 10 and applied on the electrode 3. However, the cream solder 5 can be applied on the electrode 3 by a screen printing device. The printed circuit board 1 has the above-described configuration. Next, a method for mounting the electronic component P will be described. In FIG. 1, when the moving table 13 is driven, the transfer head 11 moves in the X direction and the Y direction, and vacuum picks up and picks up an electronic component P provided in a parts feeder (not shown) by a nozzle. . Next, the transfer head 11 moves above the printed circuit board 1, where the nozzle 12 descends, so that the lead L lands on the solder coating portion 4 and the cream solder 5 and is mounted on the printed circuit board 1. FIG. 2 is a front view showing that the leads L are being mounted on the solder coating portion 4 and the cream solder 5. As shown in the drawing, the center five leads L among the many leads L extending from the mold body M land on the solder coating portion 4,
The leads L at both ends land on the cream solder 5 (see the chain line in the figure). The upper surface of the solder coating portion 4 has an arc shape, and the lead L is easily slid down. However, since the cream solder 5 has an adhesive force, the lead L is adhered to this. Therefore, the electronic component P is not displaced in the lateral direction and does not slide down from the solder coating portion 4 and can be reliably landed.
Next, the printed board 1 is sent to a heating furnace, and the solder coating portion 4 and the cream solder 5 are subjected to heat treatment, so that the leads L are soldered to the electrodes 3 as shown in FIG. The present invention is not limited to the above embodiment. For example, in the above embodiment, the cream solder 5 is applied to the electrodes at both ends of the electrode row. The electrode at the center may be used. As described above, according to the present invention, cream solder is applied to some of the electrodes arranged in parallel at the end of the circuit pattern instead of the solder coating. , by pasting-adhesive strength of the solder click stream, without sliding off future electronic components landed in the solder coating unit,
Electronic components can be reliably soldered to the electrodes.
【図面の簡単な説明】
【図1】本発明の一実施例に係るプリント基板に電子部
品を搭載中の斜視図
【図2】本発明の一実施例に係るプリント基板に電子部
品を搭載中の正面図
【図3】本発明の一実施例に係るクリーム半田を塗布中
のプリント基板の正面図
【図4】本発明の一実施例に係る半田付け後のプリント
基板と電子部品の正面図
【図5】従来のプリント基板と電子部品の正面図
【符号の説明】
1 プリント基板
2 回路パターン
3 電極
4 半田コーティング部
5 クリーム半田BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic component being mounted on a printed circuit board according to one embodiment of the present invention. FIG. 2 is an electronic component being mounted on a printed circuit board according to one embodiment of the present invention. FIG. 3 is a front view of a printed circuit board during application of cream solder according to one embodiment of the present invention. FIG. 4 is a front view of a printed circuit board and electronic components after soldering according to one embodiment of the present invention. FIG. 5 is a front view of a conventional printed circuit board and electronic components. [Description of References] 1 printed circuit board 2 circuit pattern 3 electrode 4 solder coating portion 5 cream solder
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平3−30492(JP,A) 特開 平4−241500(JP,A) 特開 平5−315737(JP,A) (58)調査した分野(Int.Cl.7,DB名) H05K 3/34 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-3-30492 (JP, A) JP-A-4-241500 (JP, A) JP-A-5-315737 (JP, A) (58) Field (Int.Cl. 7 , DB name) H05K 3/34
Claims (1)
ターンの先端部に並設された電極上に半田コーティング
部を形成したプリント基板に電子部品を半田付けする電
子部品の半田付け方法であって、前記電極のうち、一部
の電極に半田コーティング部に替えてクリーム半田を塗
布したことを特徴とする電子部品の半田付け方法。(57) [Claims 1] A circuit pattern is formed on the upper surface, and an electronic component is soldered to a printed circuit board on which a solder coating portion is formed on electrodes arranged in parallel at the tip of the circuit pattern. Electric
A soldering method of electronic component, among the electrodes, soldering method of the electronic component, characterized in that in place of the solder coating portion on a part of the electrode by coating a cream solder was.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27840492A JP3471377B2 (en) | 1992-10-16 | 1992-10-16 | Electronic component soldering method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27840492A JP3471377B2 (en) | 1992-10-16 | 1992-10-16 | Electronic component soldering method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06132644A JPH06132644A (en) | 1994-05-13 |
JP3471377B2 true JP3471377B2 (en) | 2003-12-02 |
Family
ID=17596880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27840492A Expired - Fee Related JP3471377B2 (en) | 1992-10-16 | 1992-10-16 | Electronic component soldering method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3471377B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6001761A (en) * | 1994-09-27 | 1999-12-14 | Nippon Shokubai Co., Ltd. | Ceramics sheet and production method for same |
-
1992
- 1992-10-16 JP JP27840492A patent/JP3471377B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06132644A (en) | 1994-05-13 |
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Legal Events
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Free format text: PAYMENT UNTIL: 20080912 Year of fee payment: 5 |
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