Lubricant aluminium entry sheet is also known as PCB circuit boards. It can be manufactured by Signi 1100, 1060,1050. Lubricant aluminium entry sheets are often used in thermal insulation boards of electronic products. Aluminium entry sheets is made of insulating board as the base material, cut into a certain size, attached with a conductive pattern and arranged with holes, used to replace the chassis of the previous electronic components of the device, and realize the mutual connection between electronic components. Since the board is made by electronic printing, it is called "printed" circuit board.

Lubricant aluminium entry sheet is often used in 1100 and 1060 1050 aluminium sheets in the state of H18. The thickness is 0.125-0.24mm, the width is 1244/1245mm and the length is 940/1041/1092mm. The products are widely used in various fields such as communication, aviation, automobiles, electric power, medical treatment, electromechanic and computer.