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Today we are going to introduce the secret of the copper foil on PCB. First let’s learn about the background and history of copper foil

In PCB routing design, ensuring minimal loop area is an important consideration. Loop area refers to the area enclosed by the signal trace and its return path. The size of this loop area directly affects the electromagnetic compatibility (EMC) and radio frequency interference (RFI) of the circuit.

Today, Let’s learn about the notes about setting electronic components on PCB routing: In the PCB design process, starting from the schematic is a crucial step that determines the basic functionality and performance of the circuit.

Now Let’s continue to learn about the virtual partition Layout of analog ground and digital ground on PCB

As we all know that, perfect quality check makes perfect product. The cover figure is showing that our quality checking engineer is checking the new product which just finished, after the checking we will keep some samples for finding other possible improvements for our customers.

Today, here is our new products which will sent to our Europe customer. This product is produced with gold finger technique.

Let's continue to learn about the digital ground and analog ground. In PCB design and manufacturing, separating analog and digital ground planes is a common practice to reduce crosstalk between analog and digital circuits. By defining separate analog and digital grounding sections, it becomes easy to determine in the schematic which components and pins should be connected to the digital ground section and which should be connected to the analog ground section.

Continue with the previous article: When a signal transitions to a different layer with a different reference plane, stitching capacitors should be implemented.

Let's continue to explain the next note on PCB routing: In PCB design, the power plane is often used as a reference plane for signals. When signals need to return through the power plane, they reference the power and ground. To switch the reference from the signal layer to the power layer, stitching capacitors should be added at the points of return current and source current. These capacitors help stabilize the potential difference between the power plane and the signal layer, reducing noise and interference.

When routing signals across two different reference planes, it is necessary to incorporate stitch capacitors. Stitch capacitors allow the return current to transfer from one reference plane to another. Capacitors should be placed close to the signal path to minimize the distance between the forward path and the return path. Typically, stitch capacitors range between 10nF and 100nF.

Let's proceed to discuss the next attention point: Routing signals on a split plane should be avoided.

Let's continue to learn about the rest of 4 situations and methods to reduce the tight delay deviation.