Different Turn key PCB assembly result in a number of PBC specifications and prices in printed circuit board prototyping and production. You can find 1 or 2 layer boards which simply require on pre-preg “core” or multiple layer boards which use two or more types of cores in construction. Pre-preg, a material made from fine layers of fiberglass “pre-impregnated” having a bonding agent or metal core in a sheet form, has several different measures based on the intended use and the desired thickness. The thickness of your board may vary coming 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 such as fiberglass in addition to a copper foil placed on both sides; these usually come in predefined thicknesses.
FR4, one of the most widely used family of substrates in printed circuit boards, is really a glass fiber epoxy laminate. FR4 is considered the most standard material with higher numbers (for example FR4-06, FR4-08) have higher temperature coefficients minimizing dielectric constants. FR4 includes a starting Tg of 140 degrees Celsius, FR4-06 includes a Tg of 170 degrees and also as you progress up the family unit, the temperature increases.
Popular in Light Emitting Diode printed circuits boards, Metal Core has great heat elimination. One particular layer MCPBC has a metal base, usually an aluminum and non-conduction layer, a copper circuit layer, IC components plus a solder mask. The metal core acts for an amazing heat sinks, so that the safety from the LED’s.
Tougher than FR4, polyimide sustains hotter temperatures; it is then perfect for utilization in electrical insulation applications that match the class H requirements. The polyimide includes a silicone adhesive design and also a polyimide film created to withstand high temperatures. It protects edge connectors, gold edge fingers during wave soldering, and the reflow soldering processes during Heavy Copper PCB. Another interesting fact about polyimide will be the color. While most boards come out 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 usually do not carry the myth to be exotic any more. PTFE/woven glass met1cor materials give both rapid growth of applications operations and meet high-frequency demands on the material which has availability and proven performance.
Use Arlon materials for that Metal Core PCB and frequency dependent printed circuit manufacturing. Common applications include those prone to high temperatures during processing such as 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 that require a quicker signal speed and better signal integrity. Isola is likewise the best manufacturer of Lead Free materials, their IS410 and 370HR are definitely the main materials utilized for ROHS compliant boards.