Different Turn key PCB assembly result in many different PBC specifications and costs in printed circuit board prototyping and production. There are 1 or 2 layer boards that require on pre-preg “core” or multiple layer boards which use 2 or more varieties of cores in construction. Pre-preg, a material made from fine layers of fiberglass “pre-impregnated” by using a bonding agent or metal core within a sheet form, has several different measures dependant upon the intended use and the desired thickness. The thickness of your respective board may vary from a couple mils thick for flex boards to some quarter inch thick for heavy burn in boards. Core materials resemble slim double-sided boards with dielectric materials for example fiberglass along with a copper foil placed on each side; these usually come in predefined thicknesses.
FR4, by far the most widely used group of substrates in printed circuit boards, can be a glass fiber epoxy laminate. FR4 is regarded as the standard material with higher numbers (such as FR4-06, FR4-08) have higher temperature coefficients and minimize dielectric constants. FR4 features a starting Tg of 140 degrees Celsius, FR4-06 includes a Tg of 170 degrees and also as you move up the family unit, the temperature increases.
Popular in Light Emitting Diode printed circuits boards, Metal Core has great heat elimination. An individual layer MCPBC contains a metal base, usually an aluminum and non-conduction layer, a copper circuit layer, IC components plus a solder mask. The metal core acts being an amazing heat sinks, to be sure the safety of your LED’s.
Tougher than FR4, polyimide sustains hotter temperatures; it is then ideal for use within electrical insulation applications that match the class H requirements. The polyimide consists of a silicone adhesive design in addition to a polyimide film manufactured to withstand high temperatures. It protects edge connectors, gold edge fingers during wave soldering, as well as the reflow soldering processes during Heavy Copper PCB. Another interesting fact about polyimide is the color. While most boards appear green in color, polyimide is definitely distinguishable by its brown color.
PTFE/Woven glass base PCB materials require special drilling because when compared with FR4 the Teflon is soft. These materials tend not to carry the myth of being exotic anymore. PTFE/woven glass met1cor materials give both rapid development of applications operations and meet high-frequency demands on the material that has availability and proven performance.
Use Arlon materials to the Metal Core PCB and frequency dependent printed circuit manufacturing. Common applications include those prone to high temperatures during processing for example applications containing significant lifetime temperatures and lead-free soldering. These include under-hood automotive controls, down hole drilling, burn in boards, aircraft engine instrumentation and industrial sensors.
Advanced circuitry applications use Isola range, a very high performance FR-4 epoxy laminate and pre-preg system. Isola’s low dielectric constant and low dissipation factor produce the ideal material for broadband circuit designs which need a faster signal speed and/or better signal integrity. Isola is additionally the leading manufacturer of Lead Free materials, their IS410 and 370HR are the main materials employed for ROHS compliant boards.