Dell computer connect pcb board

How to connect two PCB boards together?

In the production of computer motherboard, PCI function test is needed, so a PCI card must be inserted into the PCI slot of motherboard. In the process of plugging and plugging for a long time, the frequently inserted PCI device card will be worn. At this time, PCI PCB adapter card plays its role.

Connect gold finger PCB

In the computer memory module, graphics card, we can see a row of golden conductive contacts, they are called "golden fingers". The gold finger (or edge connector) in PCB design and production industry uses the connector connector as the outlet of external connection network.

At present, in the field of electronic product design, a PCB(printed circuit board) as an integral part of the whole equipment can not form an electronic product. There must be external connection problems, such as multiple PCB boards. The common electrical connection structures between PCBs mainly include the following:

1. The first PCB and the second PCB are connected with each other in the way of direct tin coating. The disadvantages of the connection structure are: the second PCB is welded on the pad corresponding to the first PCB through the end pad on its side end face, the end pad and the second PCB need to be electrically connected with the first PCB through the wiring connection of the end pad and the first PCB board; the wiring connection between the corresponding pad of the first PCB board and the first PCB board is conducted. In this way, although there is no need to open a pad hole on the first PCB board, nor does it need to be connected by a connector. However, there are about 50% empty soldering of tin on the existing furnace soldering process, and for each PCB board, there are different deformation after the furnace, and the defect rate is large, which affects the performance of the whole machine and increases the maintenance time of the staff.

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 on the connector needs to be accurately designed according to the size of the socket, the number of connection points, the contact distance and the location of the positioning hole, so that it can be connected with the special PCB board socket, so the versatility is not high, Moreover, the connection part between the connector and the socket often causes poor contact due to aging and oxidation, which directly affects the electrical connection performance.

Therefore, it is an important content of PCB design to select the best matching connection structure of reliability, process and economy.