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In a method for producing an electrical connection between a flexible printed-circuit board (1) and a metallic mating contact member (8), an illumination opening (5) is formed in a first insulating layer (2) and a connecting opening (6) is formed in a second insulating layer (3). A section (8a) of t

In a method for producing an electrical connection between a flexible printed-circuit board (1) and a metallic mating contact member (8), an illumination opening (5) is formed in a first insulating layer (2) and a connecting opening (6) is formed in a second insulating layer (3). A section (8a) of the metallic mating contact member (8) is brought into bearing contact with a conductor track (4) through the connecting opening (6). Welding/soldering of the conductor track (4) to the connecting section (8a) is brought about by radiant heating by means of laser light (9) directed through the illumination opening (5).

대표청구항 ▼

1. A method for producing an electrical connection between a flexible printed-circuit board constructed from first and second insulating layers and at least one metallic conductor track there between, and a metallic mating contact member, comprising forming an opening in the first insulating layer t

1. A method for producing an electrical connection between a flexible printed-circuit board constructed from first and second insulating layers and at least one metallic conductor track there between, and a metallic mating contact member, comprising forming an opening in the first insulating layer through which light can pass; forming a connecting opening in the second insulating layer opposite the opening in the first insulating layer; contacting a connecting section of the metallic mating contact member with the metallic conductor track through the connecting opening, said connecting section having a lateral dimension that is smaller than the width of the connecting opening; forming a through-hole between the connecting opening and the opening in the first insulating layer which penetrates the conductor track, the lateral dimension of the through-hole being smaller than the width of the connecting opening; forming a projection on the connecting section of the mating contact member which is inserted in the through-hole; and forming a welded or soldered joint by heating the connecting section projection by a laser light directed through the opening in the first insulating layer. 2. The method according to claim 1, wherein the flexible printed-circuit board has a thickness ranging between about 40 and 150 μm. 3. The method according to claim 2, wherein the thickness ranges between about 50 and 70 μm. 4. The method according to claim 1, wherein the metallic mating contact member is a terminal pin of an electrical component and the connecting section is provided by a free end face of the terminal pin. 5. The method according to claim 1, wherein the metallic mating contact member is a terminal pin of an electrical component and the connecting section is provided by a peripheral wall surface of the terminal pin. 6. The method according to claim 1, wherein an organic anticorrosive layer covering the opening in the first insulating layer is applied to the conductor track. 7. An electrical connection site between a flexible printed circuit board and a metallic mating contact member, comprising a flexible printed-circuit board constructed from first and second insulating layers and at least one metallic conductor track therebetween, a light-transmitting opening formed in a first insulating layer, a connecting opening formed opposite the light-transmitting opening in the second insulating layer, a through-hole between the connecting opening and the opening in the first insulating layer which penetrates the conductor track, the lateral dimension of the through-hole being smaller than the width of the connecting opening, wherein the metallic mating contact member comprises a connecting section having a lateral dimension which is smaller than the width of the connecting opening, and wherein the connecting section protrudes through the through-hole for welding or soldering to the metallic conductor track by a laser light directed through the light transmitting opening. 8. The electrical contact site according to claim 7, wherein the mating contact member is a terminal pin or a contact pin. 9. An installation in an engine or gearbox of a motor vehicle, comprising a control device having an oiltight housing in which an electric circuit is located, a flexible printed-circuit board in electrical connection with the electric circuit which is led through a sealing gap in the housing to outside, and electrical components located outside the control device having terminal pins connected directly to the flexible printed-circuit board via an electrical connection site according to claim 7. 10. The installation according to claim 9, wherein the electrical components are sensors and actuators.