Method for solderless electrical press-in contacting of electrically conductive press-in pins in circuit boards

Patent metadata

Field	Value
Publication number	US-10148054-B2
Application number	US-201515509570-A
Country	US
Kind code	B2
Filing date	Jun 19, 2015
Priority date	Sep 8, 2014
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A method is described for solderless electrical press-in contacting of conductive press-in pins in circuit boards, the method comprising the following steps: Providing a circuit board having at least one contacting opening for press-in contacting; providing at least one press-in component having at least one conductive press-in pin; providing a sonotrode for exerting a force and for applying ultrasonic energy. In order to electrically and mechanically contact press-in pins to a circuit board by means of ultrasonic press-in technology, it is provided that the press-in component together with its press-in pin, is fixated during a press-in step, in particular held firmly in place, and that a force and ultrasonic energy are directly applied to the circuit board by means of the sonotrode such that the circuit board is pressed at the location of its contacting opening onto the press-in pin, not directly acted upon by the sonotrode, of the press-in component.

First claim

What is claimed is:

1. A method for solderless electrical press-in contacting of at least one electrically conductive press-in pin in a circuit board, comprising:
providing the circuit board, wherein the circuit board includes at least one contacting opening for a press-in contacting, and wherein the at least one contacting opening is routed essentially perpendicularly through the circuit board;
providing at least one press-in component having the at least one electrically conductive press-in pin;
providing a sonotrode for exerting a force and for applying ultrasonic energy; and
fixating the at least one press-in component having the at least one press-in pin during a press-in step, wherein, in the press-in step, the force and the ultrasonic energy is applied directly to the circuit board with the aid of the sonotrode, in such a way that the circuit board is pressed onto the at least one press-in pin, not directly acted upon by means of the sonotrode, of the at least one press-in component at a location of the at least one contacting opening.

2. The method as recited in claim 1 , wherein the at least one press-in component is held firmly in place by the fixating.

3. The method as recited in claim 1 , further comprising
prior to the press-in step, fitting the circuit board with components, wherein the fitting of components on the circuit board is completely finished except for the press-in step for the fitting with the at least one press-in component.

4. The method as recited in claim 3 , wherein the sonotrode includes recesses on a side facing the circuit board at locations that during the press-in step lie opposite from the locations, fitted with the components, of a side of the circuit board facing the sonotrode.

5. The method as recited in claim 1 , wherein:
the circuit board has a first side facing the at least one press-in component, and has a second side facing away from the first side, and
the sonotrode is set down on the second side during the press-in step.

6. The method as recited in claim 5 , wherein the sonotrode covers at least 75% of an area of the second side.

7. The method as recited in claim 1 , wherein:
during the press-in step, the sonotrode presses the circuit board onto the at least one press-in pin along an extension direction of the at least one contacting opening across a distance, and
a first force and a first ultrasonic energy are applied to the sonotrode during the press-in step along the distance.

8. The method as recited in claim 7 , wherein, after covering the distance:
the sonotrode exerts a second force on the circuit board,
the second force is lower than the first force,
the sonotrode applies a second ultrasonic energy to the circuit board, and
the second ultrasonic energy is one of lower than, equal to, and greater than the first ultrasonic energy.

9. The method as recited in claim 8 , wherein the second force amounts to maximally 10% of the first force.

10. The method as recited in claim 8 , wherein the second ultrasonic energy is greater by at least 25% than the first ultrasonic energy.

11. The method as recited in claim 8 , wherein the second ultrasonic energy is lower by at least 25% than the first ultrasonic energy.

12. The method as recited in claim 1 , wherein the at least one press-in pin is made of a material that is one of aluminum, copper, iron, or alloys thereof.

13. The method as recited in claim 1 , wherein the at least one press-in pin includes a solid design.

14. The method as recited in claim 13 , wherein the at least one press-in pin is one of without a cavity and without a flexible section.

15. The method as recited in claim 1 , further comprising providing a plurality of press-in pins on the at least one component, wherein the circuit board includes a number of contacting openings that corresponds to the number of press-in pins of the at least one component.

16. The method as recited in claim 15 , wherein the plurality of press-in pins includes at least four press-in pins.

Assignees

• Bosch Gmbh Robert

Inventors

• Otto Andreas
• Halm Cynthia

Classifications

• H05K3/328

  by welding · CPC title

• H05K2203/0195

  Tool for a process not provided for in H05K3/00, e.g. tool for handling objects using suction, for deforming objects, for applying local pressure · CPC title

• H05K2203/0278

  Flat pressure, e.g. for connecting terminals with anisotropic conductive adhesive · CPC title

• H01R12/00

  Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures (printed connections to, or between, printed circuits H05K1/11) · CPC title

• H05K2201/10189

  Non-printed connector · CPC title