PCB Printed Circuit Board Manufacturer in China: PCB material introduction

PCB Printed Circuit Board Manufacturer in China share knowledge of PCB materials.

PCB material introduction:

1. Conductive medium: copper (CU)

- Copper foil: rolled copper (RA), electrolytic copper (ED), high ductility electrolytic copper (HTE)

- Thickness: 1/4OZ, 1/3OZ, 1/2OZ, 1OZ, 2OZ, which is the more common thickness

-OZ (ounces): copper foil thickness unit; 1OZ = 1.4 mil

2. Insulation: Polyimide, Polyester, Polyethylene (PEN)

- The more common one is polyimide (referred to as "PI")

-PI thickness: 1/2 mil, 1 mil, 2 mil, which is the more common thickness

-1 mil = 0.0254mm = 25.4um = 1/1000 inch

3. Adhesive: epoxy resin, acrylic.

- The epoxy resin is more commonly used, and the thickness is different depending on the manufacturer.

4, CCL (Cucladlaminates, referred to as "CCL"):

- Single-sided copper clad laminate: 3LCCL (with glue), 2LCCL (without glue)

- Double-sided copper clad laminate: 3LCCL (with glue), 2LCCL (without glue)

5, coverlay (Coverlay, referred to as "CVL"): consists of an insulating layer and an adhesive, covering the wire,

Protects and insulates. The specific laminate structure is as follows:

Auxiliary material：

Stiffener: including FR4, PI, SUS...

2. Conductive silver foil: electromagnetic wave protective film

- Type: SF-PC6000 (black, 16um)

-Advantage: Ultra-thin, good sliding performance and flexural performance, suitable for high temperature reflow

Welding, good dimensional stability.

The commonly used one is SF-PC6000, and the laminated structure is as follows: