怎样更换广告牌的面板

The LED board is FR-4, but it is the worst grade of FR-4 double-sided board. The price is relatively higher than the normal ones. There are many light strips in Zhongshan Ancient Town. The aluminum substrate is chosen as the board. The heat dissipation performance of the aluminum substrate is better than that of FR-4. Many light strip boards and round lamps are chosen as copper clad laminate ----- also known as the base material.

Copper Clad Laminate, full name copper clad laminate, English abbreviation CCL, is made of wood pulp paper or fiberglass cloth as reinforcing materials, impre gnated with resin, and covered with copper foil on one or both sides , a product made by hot pre ssing. When it is used in multi-layer board production, it is also called core board (CORE).

Currently, the copper-clad laminates supplied on the market can be mainly divided into the following categories based on the base material: aluminum substrate, paper substrate, fiberglass cloth substrate, synthetic fiber cloth substrate, non-woven substrate, composite substrate. . .

The following types of copper-clad laminates are commonly used:

FR-1 - phenolic tissue paper, this base material is commonly known as bakelite (more economical than FR-2)

FR-2——phenolic tissue paper,

FR-3——cotton paper, epoxy resin

FR-4——glass cloth ( Wovenglass), epoxy resin

FR-5——Glass cloth, epoxy resin

FR-6——Matte glass, polyester

G -10——Glass cloth, epoxy resin

CEM-1——Tissue paper, epoxy resin (flame retardant)

CEM-2——Tissue paper, epoxy resin (Non-flame retardant)

CEM-3——Glass cloth, epoxy resin

CEM-4——Glass cloth, epoxy resin

CEM- 5——Glass cloth, polyester

AIN——Aluminum nitride

SIC——Silicon carbide