# How to make Panel for MCPCB?

_Published: 2021-07-16_

Regarding all [Metal core PCB](https://www.bestpcbs.com/products/metal-core-pcb.htm) required panelization, which needs to take into account how the boards are connected. There are two main connection methods for panel: Double face carved V-shaped groove (V-CUT), and the long slot plus a small circular hole (commonly known as stamp hole), depending on the shape of the PCB.

1. V-CUT

V-CUT is to draw a slot at the junction of two boards, where the connection of the boards is relatively thin and easy to break. Currently [SMT Board](https://www.bestpcbs.com/products/smt-stencil.htm) is widely used, characterized with neat and level edges after separation, which is recommended as priority.

V-cuts are generally straight lines, and there will be no complicated traces such as curved arcs, so pay attention to be in a straight line when making the panelization. Please also note the following two points.

â‘  The two sides of V-CUT line (top side and bottom side) require a no circuits area that is not smaller than 1mm, to avoid the damage circuits when separating.

② After cutting the V-shaped groove, the remaining thickness should be 1/4 to 1/3 of the total board thickness , which is not smaller than 0.4mm.

[https://www.bestpcbs.com/blogimages/2021/07/16/V-cut.jpg](https://www.bestpcbs.com/blogimages/2021/07/16/V-cut.jpg)V-Cut

- Stamp Holes/Mouse Bite

For irregular [PCB boards](https://www.bestpcbs.com/products/FR4-pcb.htm), the shape of the board has curved corners, there will be many burrs if use V-cut. In this case the stamp hole connection would be the better choice.

1. Panelization Rules:

1. The spacing between the panel and the board is 1.2mm or 1.6mm.

- The diameter of hole is 0.55mm, generally a row of 8 holes (Hole count depends on the design requirements, more holes can enhance the stability), the spacing of the two holes is 0.2mm.

- The distance between the upper and lower rows of holes is 2mm, and 1/3 of the stamp holes enter the board. Pay attention to avoid the circuit on the edge of the board.

- After adding the stamp holes, the shape of both sides of the hole need to be connected to facilitate the subsequent routing manufacturing.

- The part picture after panelization.(Using the connection bridge in the middle, which can minimize the residual.)

[https://www.bestpcbs.com/blogimages/2021/07/16/Part-Picture.jpg](https://www.bestpcbs.com/blogimages/2021/07/16/Part-Picture.jpg)Part Picture

- The effect picture after panelization.

![](https://www.bestpcbs.com/blogimages/2021/07/16/Stamp-Holes.jpg)Stamp Holes

If you want to learn more about [MCPCB](https://www.bestpcbs.com/products/metal-core-pcb.htm) design, welcome contact us.