Different Turn key PCB assembly result in many different PBC specifications and costs in printed circuit board prototyping and production. There are actually 1 or 2 layer boards that just require on pre-preg “core” or multiple layer boards which use several forms of cores in construction. Pre-preg, a material manufactured from fine layers of fiberglass “pre-impregnated” having a bonding agent or metal core within a sheet form, has many different measures depending on the intended use along with the desired thickness. The thickness of your respective board may differ from a couple mils thick for flex boards to a quarter inch thick for heavy burn in boards. Core materials resemble slim double-sided boards with dielectric materials such as fiberglass together with a copper foil placed on both sides; these usually come in predefined thicknesses.
FR4, the most popular group of substrates in printed circuit boards, is a glass fiber epoxy laminate. FR4 is the most standard material with higher numbers (for example FR4-06, FR4-08) have higher temperature coefficients and minimize dielectric constants. FR4 has a starting Tg of 140 degrees Celsius, FR4-06 carries a Tg of 170 degrees and also as you progress up the household, 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 as being an amazing heat sinks, to be sure the safety from the LED’s.
Tougher than FR4, polyimide sustains hotter temperatures; this makes it well suited for use within electrical insulation applications that meet the class H requirements. The polyimide includes silicone adhesive design together with a polyimide film built to withstand high temperatures. It protects edge connectors, gold edge fingers during wave soldering, along with the reflow soldering processes during Heavy Copper PCB. Another interesting fact about polyimide may be the color. While most boards turn out green colored, polyimide is easily distinguishable by its brown color.
PTFE/Woven glass base PCB materials require special drilling because when compared to FR4 the Teflon is soft. These materials do not carry the myth of being exotic any more. PTFE/woven glass met1cor materials give both rapid growth of applications operations and meet high-frequency demands with a material which includes availability and proven performance.
Use Arlon materials for your Metal Core PCB and frequency dependent printed circuit manufacturing. Common applications include those at risk of high temperatures during processing like 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 high performance FR-4 epoxy laminate and pre-preg system. Isola’s low dielectric constant and low dissipation factor create the ideal material for broadband circuit designs that need a faster signal speed and better signal integrity. Isola is likewise the top manufacturer of Lead Free materials, their IS410 and 370HR are the main materials useful for ROHS compliant boards.