FR2631770A3 - PRINTED CIRCUIT BOARD - Google Patents
PRINTED CIRCUIT BOARD Download PDFInfo
- Publication number
- FR2631770A3 FR2631770A3 FR8906477A FR8906477A FR2631770A3 FR 2631770 A3 FR2631770 A3 FR 2631770A3 FR 8906477 A FR8906477 A FR 8906477A FR 8906477 A FR8906477 A FR 8906477A FR 2631770 A3 FR2631770 A3 FR 2631770A3
- Authority
- FR
- France
- Prior art keywords
- circuit board
- printed circuit
- hole
- component
- welding
- 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
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
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/115—Via connections; Lands around holes or via connections
- H05K1/116—Lands, clearance holes or other lay-out details concerning the surrounding of a via
-
- 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
- H05K3/3447—Lead-in-hole 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09209—Shape and layout details of conductors
- H05K2201/09372—Pads and lands
- H05K2201/0949—Pad close to a hole, not surrounding the hole
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10621—Components characterised by their electrical contacts
- H05K2201/10651—Component having two leads, e.g. resistor, capacitor
-
- 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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10613—Details of electrical connections of non-printed components, e.g. special leads
- H05K2201/10742—Details of leads
- H05K2201/1075—Shape details
- H05K2201/10757—Bent leads
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/14—Related to the order of processing steps
- H05K2203/1446—Treatment after insertion of lead into hole, e.g. bending, cutting, caulking or curing of adhesive but excluding soldering
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Structures For Mounting Electric Components On Printed Circuit Boards (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Multi-Conductor Connections (AREA)
Abstract
L'invention concerne une plaquette à circuits imprimés 1 comportant un composant 6 soudé sur elle, les broches de raccordement 5 de ce composant étant enfoncées dans des trous 4 et comprenant des parties coudées 8. Pour améliorer la fixation du composant 6 sur la plaquette à circuits imprimés 1, on prévoit qu'au moins l'une des surfaces de soudage 7 est située à une certaine distance du trou 4 qui lui est associé. La partie coudée 8 est dirigée vers cette surface de soudage 7 et est soudée sur elle. L'étain à souder 10 laisse le pourtour 9 du trou 4 libre.The invention relates to a printed circuit board 1 comprising a component 6 soldered to it, the connection pins 5 of this component being driven into holes 4 and comprising angled parts 8. To improve the fixing of the component 6 on the board to printed circuits 1, provision is made for at least one of the welding surfaces 7 to be located at a certain distance from the hole 4 which is associated with it. The angled part 8 is directed towards this welding surface 7 and is welded to it. The soldering tin 10 leaves the periphery 9 of the hole 4 free.
Description
Plaquette à circuits imprimés L'invention concerne une plaquette àThe invention relates to a circuit board
circuits imprimés comprenant un composant électrique fixé par soudage, les broches de raccordement du composant étant enfoncées dans des trous de la plaquette à circuits imprimés et comprenant sur le côté qui est à l'opposé du composant des parties coudées qui sont soudées sur des surfaces de soudage de voies printed circuits comprising an electric component fixed by welding, the connection pins of the component being inserted into holes in the printed circuit board and comprising on the side which is opposite the component bent parts which are welded on surfaces of track welding
conductrices prévues sur la plaquette à circuits imprimés. conductors provided on the printed circuit board.
Il est connu de fixer des composants électriques tels que des petits transformateurs sur une plaquette à circuits imprimés en enfonçant ses broches de raccordement dans des trous de la plaquette et ensuite en les coudant. Le transformateur est ainsi momentanément retenu sur la plaquette. Ensuite, on réalise une pastille de soudure en étain à souder dans un bain de soudure. Pour réaliser la pastille de soudure, il est prévu sur la plaquette à circuits imprimés une surface de soudage de forme circulaire qui entoure le trou. On a constaté lors du contrôle sous des sollicitations alternées de température et d'essais sous vibrations que la pastille de soudure, en particulier quand il s'agit de petits transformateurs lourds, a tendance à former des fissurations. Les fissurations apparaissent de préférence sur le caté du trou qui est à l'opposé de la plaquette à circuits imprimés. La raison en est que l'épaisseur de l'étain à souder est faible en cet endroit car l'étain à souder flue de préférence en direction de la It is known to fix electrical components such as small transformers on a printed circuit board by pushing its connection pins into holes in the board and then bending them. The transformer is thus momentarily retained on the wafer. Then, a tin solder pellet to be soldered in a solder bath is produced. To make the solder pad, a circularly shaped solder surface is provided on the printed circuit board which surrounds the hole. It has been found during testing under alternating stresses of temperature and vibration tests that the solder pad, in particular when it is a small heavy transformer, tends to form cracks. The cracks preferably appear on the caté of the hole which is opposite the printed circuit board. The reason is that the thickness of the soldering tin is small at this point because the soldering tin preferably flows in the direction of the
partie coudée.bent part.
- 2 Pour limiter la formation de fissurations, on peut donner au trou traversant un diamètre suffisamment petit pour que la broche de raccordement s'y adapte exactement. Cependant, ceci n'est pas indiqué car une mise en place mécanique du composant sur la plaquette à circuits imprimés est alors rendue pour le moins beaucoup plus difficile. Une certaine amélioration de la fixation pourrait par ailleurs - 2 To limit the formation of cracks, we can give the through hole a diameter small enough that the connecting pin fits exactly. However, this is not indicated because mechanical installation of the component on the printed circuit board is then made at least much more difficult. Some improvement in fixation could also
être obtenue en introduisant dans les trous des rivets creux soudables. be obtained by introducing weldable hollow rivets into the holes.
Mais ceci serait lié à des mesures additionnelles en ce qui concerne la But this would be linked to additional measures regarding the
technique de fabrication.manufacturing technique.
Selon l'état de la technique, les boitiers de composants électriques lourds sont reliés mécaniquement à la plaquette à circuits imprimés par des moyens de fixation additionnels tels que des cadres, des vis ou des rivets. Ces possibilités de fixation sont non seulement coûteuses sur le plan de la technique de la fabrication mais exigent According to the state of the art, the boxes of heavy electrical components are mechanically connected to the printed circuit board by additional fixing means such as frames, screws or rivets. These fixing possibilities are not only costly in terms of manufacturing technique but also require
également de la place sur la plaquette à circuits imprimés. also space on the printed circuit board.
Le but de l'invention est de proposer une plaquette à circuits imprimés du type mentionné dans le préambule avec laquelle la The object of the invention is to propose a printed circuit board of the type mentioned in the preamble with which the
durabilité de la fixation du composant soit améliorée. durability of component attachment is improved.
Selon l'invention, le but ci-dessus est atteint avec une plaquette à circuits imprimés du type mentionné dans le préambule du fait qu'au moins l'une des surfaces de soudage est prévue à une certaine distance du trou qui lui est associé et que la partie coudée de la broche de raccordement est dirigée vers cette surface de soudage et soudée sur According to the invention, the above object is achieved with a printed circuit board of the type mentioned in the preamble because at least one of the soldering surfaces is provided at a certain distance from the hole which is associated with it and that the bent part of the connection pin is directed towards this welding surface and welded to
celle-ci, l'étain à souder laissant libre le pourtour du trou. this one, the tin to be welded leaving free the periphery of the hole.
Pour diverses raisons, la fixation des composants sur la plaquette à circuits imprimés se trouve ainsi améliorée par rapport à une For various reasons, the fixing of the components on the printed circuit board is thus improved compared to a
fixation au moyen d'une pastille de soudure. fixing by means of a solder pad.
La surface de soudage et la partie coudée sont largement en recouvrement, ce qui fait que l'étain à souder relie la partie-coudée à The welding surface and the bent part are largely overlapped, so that the tin to be welded connects the bent part to
la surface de soudage sur une région commune relativement importante. the welding surface over a relatively large common region.
La contrainte spécifique de l'étain à souder est de ce fait réduite. The specific stress of the tin to be welded is therefore reduced.
Les forces qui exercent une traction sur le composant sont transférées à l'étain a souder sous forme de forces de traction et de compression en raison de la partie coudée. Du fait que la position de The forces which exert a traction on the component are transferred to the tin to be welded in the form of tensile and compressive forces due to the bent part. Because the position of
263 1770263 1,770
- 3 - soudage n'est pas située concentriquement à la broche de raccordement comme c'est le cas avec une pastille de soudure, mais est déportée par rapport à celle-ci, les forces qui agissent par à-coups en direction de la traction et de la compression sont amorties élastiquement par la zone coudée de'la broche de raccordement. Comme l'étain à souder ne s'étale pas jusqu'au trou, on évite également qu'un effet d'entaille lui soit appliqué par le bord à arête aiguë du trou, effet qui serait favorable à la formation de fissurations. Un autre avantage consiste dans le fait que le trou peut être assez large pour que l'on dispose d'une plage de tolérances suffisantes en vue d'un montage mécanique des composants. Il est également avantageux qu'aucun moyen de fixation additionnel ne soit nécessaire - 3 - welding is not located concentrically with the connection pin as is the case with a welding pad, but is offset from it, the forces which act in spurts in the direction of traction and compression are absorbed elastically by the bent area of the connecting pin. As the soldering tin does not spread to the hole, it also prevents a notch effect being applied to it by the sharp edge of the hole, an effect which would be favorable to the formation of cracks. Another advantage consists in the fact that the hole can be wide enough so that there is a sufficient tolerance range for mechanical mounting of the components. It is also advantageous that no additional fixing means are necessary.
pour améliorer la fixation.to improve fixation.
Selon l'invention, la surface de soudage peut être rectangulaire According to the invention, the welding surface can be rectangular
ou ovale.or oval.
Sa largeur peut être supérieure au diamètre de la broche de raccordement. Avantageusement, la longueur de la surface de soudage s'étend Its width can be greater than the diameter of the connecting pin. Advantageously, the length of the welding surface extends
jusqu'à l'extrémité de la partie coudée. to the end of the bent part.
La partie coudée peut être pliée en formant un angle compris entre The bent part can be folded at an angle between
et 90 par rapport à la broche de raccordement proprement dite. and 90 with respect to the connection pin proper.
Finalement, la broche de raccordement peut comprendre une partie courbe à l'avant de la partie coudée, qui dégage la-broche de Finally, the connecting pin may include a curved part at the front of the bent part, which releases the pin from
raccordement du bord du trou.connection of the edge of the hole.
L'invention va maintenant être expliquée plus en détail dans ce qui suit en se référant à des modes des réalisation représentés sur le dessin annexé dans lequel: la figure 1 est une vue en coupe partielle d'une plaquette à circuits imprimés comprenant un composant, la figure 2 est une vue en plan le long de la ligne II-II de la figure 1, et la figure 3 représente une variante du mode de réalisation de la The invention will now be explained in more detail in the following, with reference to embodiments shown in the accompanying drawing in which: FIG. 1 is a view in partial section of a printed circuit board comprising a component, Figure 2 is a plan view along the line II-II of Figure 1, and Figure 3 shows a variant of the embodiment of the
figure 1.figure 1.
Une plaquette à circuits imprimés 1 est munie sur l'un de ses A printed circuit board 1 is provided on one of its
263 1 770263 1,770
-4- c8tés 2 de voies conductrices 3. Elle comprend des trous 4 pour les broches de raccordement 5 d'un composant électrique 6, tel qu'un transformateur. Les figures ne montrent respectivement que l'une des broches de raccordement 5 et le trou 4 qui lui est associé. Le composant 6 est monté sur-le c6té de la plaquette à circuits-imprimés 1 -4- c8tés 2 of conductive channels 3. It includes holes 4 for the connection pins 5 of an electrical component 6, such as a transformer. The figures show respectively only one of the connection pins 5 and the hole 4 which is associated with it. Component 6 is mounted on the side of the printed circuit board 1
qui est à l'opposé du côté 2.which is opposite side 2.
La voie conductrice 3 se termine par une surface de soudage rectangulaire 7. Sa largeur B est supérieure au diamètre de la broche de raccordement 5. La broche de raccordement 5 comprend une partie coudée 8. La longueur L de la surface de soudage 7 est sensiblement égale à la longueur de la partie coudée 8 (voir figure 2). La partie coudée 8 et la surface de soudage 7 sont sensiblement en recouvrement The conductive path 3 ends in a rectangular welding surface 7. Its width B is greater than the diameter of the connection pin 5. The connection pin 5 comprises a bent part 8. The length L of the welding surface 7 is substantially equal to the length of the bent part 8 (see Figure 2). The bent part 8 and the welding surface 7 are substantially overlapping
mutuel (voir figure 2).mutual (see Figure 2).
La surface de soudage 7 ne parvient pas jusqu'au bord 9 du trou 4, mais se termine à une certaine distance A de ce dernier. La partie coudée 8 est fixée à la surface de soudage 7 par de l'étain à souder 10. La partie coudée 8 est en outre repliée par rapport à la broche de raccordement en formant un angle compris entre 45 ' et 90 . Dans le mode de réalisation de la figure 1, cet angle est d'environ 75 . Dans le mode de réalisation de la figure 3, cet angle est de 90 , ce qui fait The welding surface 7 does not reach the edge 9 of the hole 4, but ends at a certain distance A from the latter. The bent part 8 is fixed to the welding surface 7 by soldering tin 10. The bent part 8 is further folded relative to the connecting pin at an angle between 45 'and 90. In the embodiment of FIG. 1, this angle is approximately 75. In the embodiment of FIG. 3, this angle is 90, which makes
que la partie coudée 8 s'étend parallèlement à la surface de soudage 7. that the bent part 8 extends parallel to the welding surface 7.
Dans le mode de réalisation de la figure 3, on a prévu à l'avant de la partie coudée 8 une partie courbe 11l qui laisse libre le bord 9 du trou. La partie courbe 11 favorise l'effet d'amortissement élastique de la broche de raccordement 5 lorsque le composant 6 est soumis à des vibrations en direction de la flèche P. La fixation décrite est réalisée sensiblement de la manière suivante. On commence par enfoncer le composant 6 par ses broches de raccordement 5 qui ne sont pas encore recourbées dans des trous correspbndants 4. Ensuite, on coude mécaniquement les broches de raccordement 5 en direction des surfaces de soudage 7, d'o résulte la partie coudée 8 ou la partie courbe 11. Le composant 6 est ainsi retenu In the embodiment of Figure 3, there is provided at the front of the bent portion 8 a curved portion 11l which leaves free the edge 9 of the hole. The curved portion 11 promotes the elastic damping effect of the connecting pin 5 when the component 6 is subjected to vibrations in the direction of the arrow P. The attachment described is produced substantially as follows. We start by driving in the component 6 by its connection pins 5 which are not yet bent in corresponding holes 4. Then, we mechanically bend the connection pins 5 in the direction of the welding surfaces 7, from which results the bent part 8 or the curved part 11. The component 6 is thus retained
sur la plaquette à circuits imprimés 1 dont il ne peut plus tomber. on the printed circuit board 1 from which it can no longer fall.
263 1770263 1,770
-5--5-
L'étain à souder 10 est ensuite appliqué-dans un bain de soudure. The soldering tin 10 is then applied in a solder bath.
L'étain à souder flue entre la surface de soudage 7 et la partie coudée The soldering tin flows between the welding surface 7 and the bent part
8, et autour de celles-ci.8, and around them.
On a constaté que lors de sollicitations alternées de température et d'essais de vibrations, la liaison décrite est fixée de façon durable même quand il s'agit de composants lourds, par comparaison avec It has been found that during alternating stresses of temperature and vibration tests, the connection described is fixed in a durable manner even when it is a question of heavy components, in comparison with
des pastille de soudure.solder pads.
263 1770263 1,770
-6--6-
Claims (6)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883817267 DE3817267A1 (en) | 1988-05-20 | 1988-05-20 | PCB |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2631770A3 true FR2631770A3 (en) | 1989-11-24 |
| FR2631770B3 FR2631770B3 (en) | 1990-04-27 |
Family
ID=6354816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8906477A Expired - Fee Related FR2631770B3 (en) | 1988-05-20 | 1989-05-18 | PRINTED CIRCUIT BOARD |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3817267A1 (en) |
| FR (1) | FR2631770B3 (en) |
| GB (1) | GB2220304B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE212780T1 (en) * | 1997-03-13 | 2002-02-15 | Siemens Ag | FLAT ASSEMBLY AND METHOD FOR SUBSEQUENTLY APPLYING ADDITIONAL COMPONENTS TO A CIRCUIT BOARD |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4219172A (en) * | 1978-06-26 | 1980-08-26 | Nifco, Inc. | Holder for electronic and electrical parts |
| DE2906980A1 (en) * | 1979-02-22 | 1980-09-04 | Siemens Ag | Electronic component panel connection system - has hole through panel for insertion and soldering, with optional fitting of protection disc |
| US4422128A (en) * | 1981-08-06 | 1983-12-20 | General Motors Corporation | Push-on terminal clip and assembly |
-
1988
- 1988-05-20 DE DE19883817267 patent/DE3817267A1/en not_active Ceased
-
1989
- 1989-05-09 GB GB8910658A patent/GB2220304B/en not_active Expired - Fee Related
- 1989-05-18 FR FR8906477A patent/FR2631770B3/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB8910658D0 (en) | 1989-06-21 |
| GB2220304A (en) | 1990-01-04 |
| GB2220304B (en) | 1992-05-20 |
| FR2631770B3 (en) | 1990-04-27 |
| DE3817267A1 (en) | 1989-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |