Copper foil with low surface oxygen characteristics, can be attached to a variety of substrates, such as metal, insulation materials, with a wide temperature range. Mainly used in electromagnetic shielding and anti-static, conductive copper foil on the substrate, combined with metal substrate, with excellent conductivity, and provide electromagnetic shielding effect. Can Be divided into: self-adhesive copper foil, double copper foil, single copper foil and so on. Electronic grade copper foil (purity above 99.7% , thickness 5um-105um) is one of the basic materials in electronic industry. Electronic information industry is developing rapidly, products are widely used in industrial calculators, communications equipment, QA equipment, lithium-ion batteries, civil television, video recorders, CD players, copiers, telephones, air-conditioning, automotive electronic components, game machines. There is an increasing demand for electronic grade copper foil, especially for high performance electronic grade copper foil at home and abroad. By 2015, China's domestic demand for electronic grade copper foil will reach 300,000 tons, and China will become the world's largest manufacturing base for printed circuit boards and copper foil.

Industrial Copper Foil can be divided into two kinds: rolled copper foil (Ra copper foil) and electrolytic copper foil (ED copper foil) , in which rolled copper foil has better ductility and other characteristics, is used in the early soft plate process of copper foil, the electrolytic copper foil has the advantage of lower manufacturing cost than the calendered copper foil. As calendered copper foil is an important raw material for soft board, the improvement of calendered copper foil characteristics and price change have certain influence on the soft board industry.

A unit of measure for the thickness of copper foil

The thickness of Copper Foil of printed circuit board is related to the change of impedance value. With the correct thickness of copper foil in the Cross section field of Allegro, the impedance (or width) of each wire wound on the printed circuit board can be calculated correctly. While it is often found in many design manuals to recommend the use of copper foil in Oz, how thick should an ounce of copper foil be in the Cross section field of Allegro? Read the instructions below:

2. Unit conversion: Oz = 0.0625 pounds (PB)1 pound (PB) = 454 grams (G)1 foot (FT) = 12 inches (in)1 inch (in) = 2.54 centimeters (cm)1 mil = 0.001 inches (in) copper specific gravity (density) = 8.93(g/cm3)

3. CALCULATIONS: 1 Oz Copper foil = 28.4 G (≈10.0625454)1 FT 2 = 1x (122.54)2 = 130.482 = 929.03(cm 2) weight (W) = volume (v) x density (D) = area (a) x height (h) x density (d)28.4(G) = 929.03x height (H) x 8.93 height (h) = 0.00342(cm)1.3() Oz copper foil thickness

4. Cross Section in Allegro so, if it's an ounce of copper foil, we enter 1.3 mil into the Cross Section field, 1OZ in the circuit board, 1OZ means that the average copper foil is 28.35 g on a square foot, the average thickness of the copper sheet is expressed by the weight per unit area!

Conversion method: 1 Square foot = 929. 0304 cm 2, the weight of copper foil divided by the density and surface area of copper foil is the thickness of copper foil! Cu density = 8.9 KG/DM ^ 3 let Copper thick TTx929. 0304 CM2 x 8.9 GCM3 = 1oz = 28.35 GCM2, t = 0.0034287 cm = 34.287 Um Oz (Oz) is itself an inch unit, which can be divided into Avoirdupois Oz and Troy Weight Oz depending on the properties of the material, ounces of medicine and ounces of liquid. Its conversion to the International Standard Unit is: AVOIRDUPOIS OUNCE 1 ounce = 28.350 grams of gold ounces 1 ounce = 31.1035 grams of liquid ounces 1 ounce = 31.1030 grams of liquid ounces 1 ounce = 28.41 millilitres is based on the density of copper and the above conversion to Troy weight ounces: If a square meter of copper foil is to weigh 1 troy ounce, that's 31.1035 Grams, so that would be 31.1035/(8.9 * 100 * 1000) = 35 microns, which is what we normally call an ounce of PCB, which is actually 35 microns, and two ounces is 70 microns. The thickness of 1 Oz represents the thickness of 1 Oz of copper laid over 1 square foot of copper foil of an area, approximately 0.034 mm = 34 UM

 SOURCE: network finishing