Dell computer connect pcb board

How to connect two PCB boards together?

When making a computer motherboard, it is necessary to perform a PCIE function test, so a PCIE card must be inserted into the PCIE slot of the motherboard. During the long-term plug-in and pull-out process, the frequently inserted PCIE device card will wear out, and at this time the PCIE PcB adapter card plays its role.

 Connect gold finger PCB

In computer memory modules and graphics cards, we can see a row of conductive contacts, which are called “old contacts”. Old contacts in PCB design and production

Industry uses connectors as outlets for external connection networks.

At present, in the field of electronic product design, a printed circuit board as an integral part of the whole machine cannot constitute an electronic product, and there must be external connection problems.

For example, there are several common electrical connection structures between PCBs: 1. The first PCB and the second PCB are connected by direct tinning.

The disadvantage of this connection structure is that the second PCB is welded to the corresponding pad of the first PCB through the end pad on its side end surface,

And the end pad and the second PCB need to be electrically connected to the first PCB through the wing-shaped connection between the end pad and the first PCB board;

The pad corresponding to the first PCB board is connected to the wing-shaped connection of the first PCB board in this way.

Although it is not necessary to open a pad hole on the first PC board, nor is it necessary to use a connector for connection, about 50% of the solder joints in the existing fusion pads have different offsets and different offset rates after welding, which affects the reliability of the machine and increases the maintenance time of employees.

2. The connector is matched with the socket on each PCB board. The disadvantage of this “building block” connection structure is that the plug part of the connector needs to be precisely designed with the size of the socket, the number of connection points, the contact distance, and the position of the connection hole. In order to connect all PCB board sockets at the fastest speed, it doesn’t matter. In addition, the connection part between the connector and the socket often produces P or poor contact due to aging and oxidation, which directly affects the electrical connection performance.

Therefore, choosing the connection structure with the best reliability, processability, and economy is an important part of PCB design.