Different Turn key PCB assembly result in a range of PBC specifications and costs in printed circuit board prototyping and production. You will find 1 or 2 layer boards that just require on pre-preg “core” or multiple layer boards which use a couple of types of cores in construction. Pre-preg, a material created from fine layers of fiberglass “pre-impregnated” with a bonding agent or metal core within a sheet form, has many different measures based on the intended use along with the desired thickness. The thickness of your own board may vary from the couple mils thick for flex boards into a quarter inch thick for heavy burn in boards. Core materials resemble slim double-sided boards with dielectric materials including fiberglass along with a copper foil put on each side; these usually can be found in predefined thicknesses.
FR4, by far the most commonly used group of substrates in printed circuit boards, is actually a glass fiber epoxy laminate. FR4 is considered the most standard material with higher numbers (including 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 so that as you move up the household, the temperature increases.
Popular in Light Emitting Diode printed circuits boards, Metal Core has great heat elimination. An individual layer MCPBC includes a metal base, usually an aluminum and non-conduction layer, a copper circuit layer, IC components and a solder mask. The metal core acts as an amazing heat sinks, to guarantee the safety from the LED’s.
Tougher than FR4, polyimide sustains hotter temperatures; this will make it perfect for utilization in electrical insulation applications that satisfy the class H requirements. The polyimide includes silicone adhesive design and also a polyimide film manufactured to withstand high temperatures. It protects edge connectors, gold edge fingers during wave soldering, and also the reflow soldering processes during Heavy Copper PCB. Another interesting fact about polyimide is the color. Some boards come out green in color, polyimide is definitely distinguishable by its brown color.
PTFE/Woven glass base PCB materials require special drilling because in comparison 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 expansion of applications operations and meet high-frequency demands over a material which has availability and proven performance.
Use Arlon materials for the Metal Core PCB and frequency dependent printed circuit manufacturing. Common applications include those susceptible to high temperatures during processing for example applications containing significant lifetime temperatures and lead-free soldering. Examples 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 make the ideal material for broadband circuit designs which need a quicker signal speed and better signal integrity. Isola is also the top manufacturer of Lead Free materials, their IS410 and 370HR would be the main materials employed for ROHS compliant boards.