The high-end USB data cable is usually composed of: plastic case - woven mesh - aluminum foil - copper core.  The innermost layer is covered with a colored insulated conductor core (copper core) for transmitting data signals and current, and the plastic outer casing is used to protect the wires; while the woven mesh and aluminum foil layers function as a shielding function.

An important function of the USB charging and data line is to transmit data signals.  But there may be various kinds of interference information when we use it around.  If these interfering signals enter the inner conductor of the data line, it is unlikely that the original transmitted signal will interfere with or alter the original transmission of the signal, resulting in a useful signal loss or problem.

USB charger and sync cable

The woven mesh and aluminum foil layer protect and shield the information we want to transmit.  Of course, not all USB data lines have two layers of shielding, some have multiple shielding layers, and some have only one layer, or even none.  Shielding is the separation of metal between two spatial regions to control the induction and radiation of electric, magnetic and electromagnetic waves from one region to another.  That is, the conductor cores are surrounded by a shield to prevent them from being affected by an external electromagnetic field/interference signal, that is, the conductor core is surrounded by a shield.

The shield of the USB data line is mainly made of non-magnetic materials such as copper and aluminum, usually woven copper mesh (aluminum-magnesium woven mesh) or copper foil (aluminum foil, etc.), which is very thin and much smaller than the metal material used.  Skin depth.  It should be noted that one end must be connected to the circuit signal, because the shielding effect is mainly due to the metal body itself not being on the electric field, but due to the grounding of the shielding layer, the different forms of the grounding will directly affect the shielding effect.

USB data and charging lead

The production process of ordinary shielded wire is as follows:

Twisted copper-extrusion (inner core)-wound (core wire)-wrapped aluminum foil-weaving (or winding)-extrusion (outside)

In electronic connecting lines, letters are often used to identify the use of materials, such as:

AL stands for aluminum, such as 4C+AL, which means a 4-wire aluminum wire package.

AB stands for weaving, such as 4C+80/0.10AB, which means a 4-core braided wire, and the braided specification is 80 copper wires of 0.10 mm outer diameter.

S represents the winding, such as 4C+60/0.10S, meaning 4C winding wire, the winding specification is 60 0.10mm outer diameter copper wire.

Sinodec Industrial Co., ltd. is a company specializing in the development, design, manufacture and sale of USB data lines, Type C data lines, mobile phone data cable customization, USB3.0 OTG, Android Apple 2-in-1 data lines and other connection lines. It has a complete and scientific quality management system.  Also provides wholesale and customization of USB data cord.