Different Turn key PCB assembly result in a variety 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 forms of cores in construction. Pre-preg, a material created from fine layers of fiberglass “pre-impregnated” using a bonding agent or metal core within a sheet form, has several different measures based on the intended use and also the desired thickness. The thickness of the board may differ from the 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 including fiberglass plus a copper foil put on both sides; these usually are available in predefined thicknesses.
FR4, one of the most widely used group of substrates in printed circuit boards, can be a glass fiber epoxy laminate. FR4 is the most standard material with higher numbers (including FR4-06, FR4-08) have higher temperature coefficients and reduce dielectric constants. FR4 carries a starting Tg of 140 degrees Celsius, FR4-06 carries a Tg of 170 degrees so when you progress up the family, the temperature increases.
Popular in Light Emitting Diode printed circuits boards, Metal Core has great heat elimination. Just one layer MCPBC has a metal base, usually an aluminum and non-conduction layer, a copper circuit layer, IC components along with a solder mask. The metal core acts as an amazing heat sinks, to be sure the safety of the LED’s.
Tougher than FR4, polyimide sustains hotter temperatures; it is then perfect for use within electrical insulation applications that fulfill the class H requirements. The polyimide includes a silicone adhesive design as well as a polyimide film manufactured 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 many boards emerge green in color, polyimide is definitely 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 usually do not carry the myth for being exotic any longer. PTFE/woven glass met1cor materials give both rapid development of applications operations and meet high-frequency demands on 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 vulnerable to 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 make the ideal material for broadband circuit designs which need a quicker signal speed and better signal integrity. Isola can also be the key manufacturer of Lead Free materials, their IS410 and 370HR are definitely the main materials employed for ROHS compliant boards.