Siemens Aktiengesellschaft

Detlef Haupt

Frank Franzen

Josef Loibl

A method for producing an electrical circuit between a flexible circuit board () is described, with single-sided access and a metallic contact partner (), such that the contact partner () reaches the metallic conductor strip () of the circuit board () through an access opening () in the unit. The circuit board () is thus irradiated with laser light () in a region opposite the access opening () causing a welded connection between the contact partner () and the conductor strip () to be formed.

Method of laser welding a flexible circuit board with a metal contact

In a method for producing an electrical connection between a flexible printed-circuit board ( ) and a metallic mating contact member ( ), an illumination opening ( ) is formed in a first insulating layer ( ) and a connecting opening ( ) is formed in a second insulating layer ( ). A section ( ) of the metallic mating contact member ( ) is brought into bearing contact with a conductor track ( ) through the connecting opening ( ). Welding/soldering of the conductor track ( ) to the connecting section ( ) is brought about by radiant heating by means of laser light ( ) directed through the illumination opening ( ).

Electrical connection method and connection site

A method for fabricating a flexible printed circuit board with access on both sides includes the steps of applying a metallic conductor track sheet to a base sheet and patterning the metallic conductor track sheet in order to produce conductor tracks. A conductor track covering with first contact-making cutouts is applied over the conductor tracks. Second contact-making cutouts are produced in the base sheet material by locally removing the base sheet through the use of laser irradiation. As an alternative, the first contact-making cutouts as well as the second contact-making cutouts can be produced by removing material with a laser.

Method for fabricating a flexible printed circuit board with access on both sides

A control unit for a motor vehicle has a base plate with press-fit openings. A conductor track carrier is mounted on the base plate. The conductor-track carrier has electrical contacting tabs in the area of the press-fit openings. An electrical contact pin that projects from a supporting body is inserted into a press-fit opening in the base plate and there contacts the contacting tab. By virtue of a reserve of material which is reduced (used) as the contact pin is pressed in, the contacting tab is anchored in the press-fit opening in an essentially tension-less manner.

Control unit for a motor vehicle

A control unit for a motor vehicle has a base plate, a conductor track substrate, an electronic circuit making contact with the conductor track substrate, and a housing cover. A contacting panel with integrally constructed press-in openings adjoins the base plate. Projecting from a support body that overlaps the contacting panel are conductor ends which protrude into the press-in openings and make electric contact there with the conductor track substrate.

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Steinsberg, Germany

Detlef Haupt