EP3136510B1 - Improvement of the adhesion of connecting elements soldered to a metal substrate by means of soldering paste - Google Patents
Improvement of the adhesion of connecting elements soldered to a metal substrate by means of soldering paste Download PDFInfo
- Publication number
- EP3136510B1 EP3136510B1 EP15002499.0A EP15002499A EP3136510B1 EP 3136510 B1 EP3136510 B1 EP 3136510B1 EP 15002499 A EP15002499 A EP 15002499A EP 3136510 B1 EP3136510 B1 EP 3136510B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- substrate
- adhesion
- connector element
- soldered
- connecting elements
- 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.)
- Active
Links
- 239000000758 substrate Substances 0.000 title claims description 24
- 238000005476 soldering Methods 0.000 title description 7
- 239000002184 metal Substances 0.000 title 1
- 229910000679 solder Inorganic materials 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/028—Soldered or welded connections comprising means for preventing flowing or wicking of solder or flux in parts not desired
Definitions
- the invention relates to the optimum shaping of connecting elements [ Fig. 1 ], which are soldered by means of a solder paste [a] on a metallic substrate [b].
- Such fasteners are usually designed as screw [c] or connectors.
- screw connections these are predominantly loaded with a torque [d], in the case of plug connections, however, usually with a tilting moment [e].
- the load capacity depends directly on the quality of the solder joint, ie on the adhesion of the connecting element on the substrate.
- soldering Another difficulty of soldering is that these connecting elements have a relatively large mass, therefore, the thermal energy expenditure for melting the solder paste is relatively high. If the solder joint is not supplied with sufficient thermal energy, so-called cold solder joints are formed which greatly reduce the adhesion of the connector to the substrate.
- an SMD component which is soldered by means of solder paste on a printed circuit board.
- the SMD component in this case comprises a foot portion and a tapered portion adjacent thereto with a smaller cross section, wherein the foot portion has a surface facing the substrate, which is soldered by means of the solder paste on the metallic substrate.
- a pressfit component with a foot section known from the display.
- SMD components are in the US 6,623,283 B1 or the DE 10 2012 021 323 A1 disclosed.
- a fundamental disadvantage of the known SMD components is that the mechanical load capacity of the solder joint is severely limited, especially in a torsional load.
- the aim of the present invention is to improve the adhesion and thus the mechanical strength of the soldered connection element in that the wettable surface is increased by appropriate shaping with the same base area and / or anchors are attached to the connecting element or on the substrate to the mechanical strength to increase.
- the desired enlargement of the solderable surface is achieved by providing vertical grooves [k] on the periphery of the connecting element associated with the soldering surface.
- the molten solder rises [I] on the flanks of the grooves [k], [h] and on the walls of the holes, thereby additionally increasing the effectively soldered surface and thus improving the adhesion of the connecting elements to the substrate [b] becomes.
- grooves [h] and / or bores [i] on the solder side of the connecting element and / or on the substrate, it can additionally be achieved that the flux gases are collected and discharged to the outside, therefore no more disruptive gas bubbles can form, which would reduce the soldered surface.
Description
Die Erfindung bezieht sich auf die optimale Formgebung von Verbindungselementen [
Die grundsätzliche Problematik bei Lötungen von großflächigen Teilen besteht darin, dass das in der Lotpaste enthaltene Flussmittel beim Lötvorgang Gase bildet, die in nur sehr geringem Maße seitlich und dies meist explosionsartig entweichen können. Der Großteil der Gase sammelt sich in Form von Gasblasen [
Eine weitere Schwierigkeit der Lötung besteht darin, dass diese Verbindungselemente eine relativ große Masse besitzen, daher der thermische Energieaufwand zum Schmelzen der Lotpaste relativ hoch ist. Wenn die Lötstelle nicht mit ausreichend thermischer Energie versorgt wird, dann entstehen sogenannte kalte Lötstellen, welche die Haftung des Verbindungselements auf dem Substrat stark verringern.Another difficulty of soldering is that these connecting elements have a relatively large mass, therefore, the thermal energy expenditure for melting the solder paste is relatively high. If the solder joint is not supplied with sufficient thermal energy, so-called cold solder joints are formed which greatly reduce the adhesion of the connector to the substrate.
Aus der Anzeige "
Ein grundsätzlicher Nachteil der bekannten SMD-Bauelemente besteht darin, dass die mechanische Belastbarkeit der Lötverbindung insbesondere bei einer Torsionsbelastung stark limitiert ist.A fundamental disadvantage of the known SMD components is that the mechanical load capacity of the solder joint is severely limited, especially in a torsional load.
Ziel der vorliegenden Erfindung ist es, die Haftung und somit die mechanische Belastbarkeit des gelöteten Verbindungselements dadurch zu verbessern, dass die benetzbare Oberfläche durch entsprechende Formgebung bei gleichbleibender Grundfläche vergrößert wird und/oder Verankerungen am Verbindungselement oder auf dem Substrat angebracht werden, um die mechanische Belastbarkeit zu erhöhen.The aim of the present invention is to improve the adhesion and thus the mechanical strength of the soldered connection element in that the wettable surface is increased by appropriate shaping with the same base area and / or anchors are attached to the connecting element or on the substrate to the mechanical strength to increase.
Gemäß der Erfindung wird die gewünschte Vergrößerung der lötbaren Oberfläche dadurch erreicht, dass an dem der Lötfläche zugeordneten Umfang des Verbindungselements vertikale Rillen [k] angebracht werden.According to the invention, the desired enlargement of the solderable surface is achieved by providing vertical grooves [k] on the periphery of the connecting element associated with the soldering surface.
Beim Lötprozess steigt an den Flanken der Rillen [k],[h] und an den Wandungen der Bohrungen das geschmolzene Lötmittel hoch [I], wodurch sich die effektiv gelötete Oberfläche zusätzlich erhöht und somit die Haftung der Verbindungselemente auf dem Substrat [b] verbessert wird.In the soldering process, the molten solder rises [I] on the flanks of the grooves [k], [h] and on the walls of the holes, thereby additionally increasing the effectively soldered surface and thus improving the adhesion of the connecting elements to the substrate [b] becomes.
Durch Anbringung von Rillen [h] und/oder Bohrungen [i] auf der Lötseite des Verbindungselements und/oder auf dem Substrat, kann zusätzlich erreicht werden, dass die Flussmittelgase gesammelt und nach außen abgeleitet werden, sich daher keine störenden Gasblasen mehr bilden können, welche die gelötete Oberfläche verringern würden.By attaching grooves [h] and / or bores [i] on the solder side of the connecting element and / or on the substrate, it can additionally be achieved that the flux gases are collected and discharged to the outside, therefore no more disruptive gas bubbles can form, which would reduce the soldered surface.
Die zusätzliche Anbringung von Verankerungen [m], die im gleichen Lötprozess von der Lotpaste [a1] benetzt werden, bewirkt, dass die mechanische Belastbarkeit weiter um ein Vielfaches erhöht wird. Diese Verankerungen [m] können sowohl am Verbindungselement [
- In den
Fig. 1 und 2 bedeuten:- [a]
- Lotpaste
- [b]
- metallisches Substrat
- [c]
- Schraubverbindung
- [d]
- Drehmoment
- [e]
- Kippmament
- [f]
- Gasblasen
- In
Fig. 3 bedeutet:- [g]
- Massereduzierung durch Verjüngung
- [h]
- Rillen auf der Lötseite des Verbindungselements
- [i]
- Bohrungen auf der Lötseite des Verbindungselements
- [k]
- Rillen am Umfang des Verbindungselements
- In
Fig.4 bedeutet:- [b]
- Metallisches Substrat
- [k]
- Rillen am Umfang des Verbindungselements
- [l]
- hochgestiegenes Lötmittel
- In
Fig.5 bedeutet:- [a]
- Lötmittel zwischen Verbindungselement und Substrat
- [a1]
- Lötmittel auf der Verankerung
- [m]
- Verankerung
- [o]
- Vertiefung im Substrat
- In the
Fig. 1 and 2 mean:- [A]
- solder paste
- [B]
- metallic substrate
- [C]
- screw
- [D]
- torque
- [E]
- Kippmament
- [F]
- gas bubbles
- In
Fig. 3 means:- [G]
- Mass reduction by rejuvenation
- [H]
- Grooves on the solder side of the connecting element
- [I]
- Holes on the solder side of the connecting element
- [K]
- Grooves on the circumference of the connecting element
- In
Figure 4 means:- [B]
- Metallic substrate
- [K]
- Grooves on the circumference of the connecting element
- [L]
- raised solder
- In
Figure 5 means:- [A]
- Solder between connecting element and substrate
- [A1]
- Solder on the anchorage
- [M]
- anchoring
- [O]
- Deepening in the substrate
Claims (4)
- Connector element (c) which is configured to be soldered on a metallic substrate (b) by means of a solder paste (a), comprising a foot portion having a surface facing the substrate (b), which is soldered on the metallic substrate (b) by means of the solder paste (a), characterized in that it is provided with grooves (k) which are located on a lateral peripheral surface and extend in a longitudinal direction of the connector element (c) until the edge of the surface facing the substrate (b), so that the molten solder paste (a) can rise on the connector element (c) and, as a consequence, the adhesion of the connector element (c) on the substrate (b) is increased.
- Connector element (c) according to claim 1, characterized in that it comprises anchors (m) adapted to be inserted into openings of the substrate (b).
- Connector element (c) according to claim 2, characterized in that the anchors (m) are dimensioned so that they are shorter than the thickness of the substrate (b) in an inserted state.
- Connector element (c) according to one of the preceding claims, characterized in that it comprises a thread or a plug connector.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15002499.0A EP3136510B1 (en) | 2015-08-24 | 2015-08-24 | Improvement of the adhesion of connecting elements soldered to a metal substrate by means of soldering paste |
DE202015107004.7U DE202015107004U1 (en) | 2015-08-24 | 2015-12-22 | Improve the adhesion of fasteners soldered to a metallic substrate by means of a solder paste |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15002499.0A EP3136510B1 (en) | 2015-08-24 | 2015-08-24 | Improvement of the adhesion of connecting elements soldered to a metal substrate by means of soldering paste |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3136510A1 EP3136510A1 (en) | 2017-03-01 |
EP3136510B1 true EP3136510B1 (en) | 2019-08-21 |
Family
ID=54011938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15002499.0A Active EP3136510B1 (en) | 2015-08-24 | 2015-08-24 | Improvement of the adhesion of connecting elements soldered to a metal substrate by means of soldering paste |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3136510B1 (en) |
DE (1) | DE202015107004U1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019104318C5 (en) | 2019-02-20 | 2023-06-22 | Auto-Kabel Management Gmbh | Electrical conductor and method for producing an electrical conductor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6623283B1 (en) * | 2000-03-08 | 2003-09-23 | Autosplice, Inc. | Connector with base having channels to facilitate surface mount solder attachment |
EP1720387A1 (en) * | 2005-05-03 | 2006-11-08 | Franz Broch | High current terminal with press fit portion |
DE102012021323B4 (en) * | 2012-10-31 | 2020-12-10 | Mtconnectivity Power2Pcb Gmbh | Method for producing an electrical connection element |
-
2015
- 2015-08-24 EP EP15002499.0A patent/EP3136510B1/en active Active
- 2015-12-22 DE DE202015107004.7U patent/DE202015107004U1/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP3136510A1 (en) | 2017-03-01 |
DE202015107004U1 (en) | 2016-02-18 |
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