Control Systems & PLC's

Pcb Connectors

Sierra Circuits: Quality PCB Material that Fits Your Needs

Different PCB materials result in a variety of PBC specifications and prices in printed circuit board prototyping and production. There are 1 or 2 layer boards that just require on pre-preg "core" or multiple layer boards which use two or more types of cores in construction. Pre-preg, a material made of fine layers of fiberglass "pre-impregnated" with a bonding agent or metal core in a sheet form, has many different measures depending on the intended use and the desired thickness. The thickness of your board can vary 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 along with a copper foil placed on each side; these usually come in predefined thicknesses. If you need a custom built thickness, Sierra Circuits has the capabilities.

 

PCB Prototype using FR4

 

FR4, the most widely used family of substrates in printed circuit boards, is a glass fiber epoxy laminate. FR4 is the most standard material with higher numbers (such as FR4-06, FR4-08) have higher temperature coefficients and lower dielectric constants. FR4 has a starting Tg of 140 degrees Celsius, FR4-06 has a Tg of 170 degrees and as you move up the family, the temperature increases.

 

PCB Prototype using Metal Core

 

Popular in Light Emitting Diode printed circuits boards, Metal Core has great heat elimination. A single layer MCPBC contains 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 ensure the safety of the LED's.

 

PCB Prototype Using Polyimide for Flexibility

 

Tougher than FR4, polyimide sustains hotter temperatures; this makes it ideal for use in electrical insulation applications that meet the class H requirements. The polyimide consists of a silicone adhesive design as well as a polyimide film built to withstand high temperatures. It protects edge connectors, gold edge fingers during wave soldering, and the reflow soldering processes during PCB assembly. Another interesting fact about polyimide is the color. While most boards come out green in color, polyimide is easily distinguishable by its brown color.

 

PCB Prototype Using Teflon for High Frequency

 

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 longer. PTFE/woven glass base materials give both rapid growth of applications operations and meet high-frequency demands on a material that has availability and proven performance.

 

PCB Prototype Using Arlon for Longer Life at Higher Temperatures

 

Use Arlon materials for the PCB fabrication of high performance and frequency dependent printed circuit manufacturing. Common applications include those vulnerable to high temperatures during processing such as 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.

 

 

Using Isola Range for PCB prototype

 

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 require a faster signal speed and/or better signal integrity. Isola is also the leading manufacturer of Lead Free materials, their IS410 and 370HR are the main materials used for ROHS compliant boards.

 

Using Rogers for PCB prototype

 

Extremely high current boards usually require Rogers materials. Rogers is the main material for Radio frequency boards that require a lot of dielectric. Rogers is thicker to ensure the current stays on the trace. Higher up Rogers materials offer more pricy ceramic and duroid materials for extremely high temperature and current applications.

 

Source:

http://pcb-prototyping.ready-online.com/pcb-material.html

https://www.protoexpress.com/index.jsp

About the Author

Amit Bahl

 

Director of Marketing and Sales for Sierra Circuits, Inc.

Amit is tasked with exploring and developing new markets for High Density Interconnect PCBs and Microelectronic substrates. Sierra Circuits, Inc. has primarily serviced the quick turn prototype market and is now actively developing the Medical, Military and Automotive markets. Prior to joining Sierra Circuits, Inc., Amit Bahl was a part of IBM's Global Services team, where he worked on automating and optimizing business processes using the latest Information technologies. Amit Bahl received his B.S.C in computer science with a minor in marketing from UCLA.

How do you design a PCB?

I want to design my own PCB. My objective is to power 3 motors from my computer using DB25 pin connector, and a power supply. MY only problem is I have no idea how to design one. I do not know any of the components either. does anyone have an idea of how to identify and learn what the components do and what components are needed for my design? thanks!

I do as I've made them before, but YA is not the platform for long instructions. You might want to sign up and ask at these forums:

Printed Circuit Designers' Forum: http://www.industrycommunity.com/myforum/jw_childers/
Printed Circuit Board Assembly & PCB Design: http://www.smtnet.com/forums/

All About Circuits: http://forum.allaboutcircuits.com/index.php?s=402ad6ea8aaebd7ea8c0ed08b996b154
Electronics Forum: http://www.dutchforce.com/~eforum/index.php?showforum=27

Ron

Spring Pluggable PCB Connectors - Phoenix Contact