Dead CB (PCB) materials are glass fibers

Dead CB (PCB) materials are glass fibers, this material in our daily lives
Source can be seen, such as fireproof, fire-proof blankets the core of glass fiber, glass fiber is very content
Easy and resin combination, we have compact, high-strength fiberglass cloth into the resin, hard
Based on thermal insulation has been difficult to bend thePCB Design substrate for a break if the PCB board,
Edge of the white layer is enough to prove that the material is fiberglass resin.
Insulation board we can not just pass electrical signals, so the surface of copper required. Therefore, we
The PCB board, also known as copper substrate. In the factory, common code shuttle copper substrate is FR-
4, the various card manufacturers in general there is no difference, so we think we can
Are in the same starting line, of course, if high-frequency board, cover the higher cost of the best Sichuan
Copper PTFE glass cloth laminate.
Copper process is very simple, generally can be rolled with the electrolytic method manufacturing, is the so-called rolling
High purity (> 99.98%) copper with a rolling method on a substrate attached to the Printed Circuit Board because the epoxy
Fat and has an excellent adhesion to copper foil, copper foil adhesion strength and high temperature, can
260 ℃ melting tin solder immersed without blistering.
This process looks somewhat like silt dumpling skin, the thinnest can be less than 1 mil (industrial unit: mil, that is one thousand
One-half inch, the equivalent of 0.0254mm). If such a thin dumpling skin, then hack a willing
Fixed leak stuffing! In the middle of this so-called copper chemistry has been studied, CuSO4 electrolyte can not
Create a layer off the "copper foil", so easy to control the thickness, the thicker the longer the copper! Pass
The thickness of copper foil factory often has very strict requirements, generally 0.3mil and 3m ", between
A dedicated copper thickness tester to test its quality. Like the old radio and amateur
With special thick copper on the PCB than the quality of the computer board factory is far worse.Aluminum PCB Manufacturers