Button Plating on a flexible circuit

May 18, 2017

Button plating describes a fabrication process widely used in the flexcircuit industry to selectively electroplate copper to the vias and onto the pads capturing the vias. The rest of the copper traces do not have plating.  Another industry term used to describe this feature is “Pads Only Plating”. Producing a...

Back bared flexible circuits

May 6, 2017

Back bared pad flexible circuits are a distinctive type of single sided flexible circuit providing some advantages over more “standard” circuits.  In the printed circuit industry, back bared pad circuit designs are also referred to as “dual access” or “reversed bared”.  As their name suggests, these circuits have insulation openings...

Origami Interconnection

April 14, 2017

Origami is the art of folding paper, it was believed to have originated in Japan, but historical evidence exists that suggests it existed in several parts of the world during the same time period.   One starts with a flat sheet of paper and by making a series of folds and...

Etchback on type 3 and type 4 flexible circuits

April 9, 2017

Thru hole etchback is a requirement that is sometimes specified on medical, military and aerospace procurement documents for multilayer flexible circuits and combination multilayer/rigid board circuits.  It specifically relates to the copper plated through-holes and the relative dimensions between the dielectric layers and copper layers. How is Etchback created? Etchback...

Vias and through-holes in a flexible circuit

March 30, 2017

I heard one of our Applications Engineers describe our product as “making sandwiches”. It is a pretty good metaphor as it helps visualize a cross section of a printed circuit with several layers of dissimilar materials.  Most flexible circuits and PCB’s have multiple conductive layers and are designed to have...

Maximizing Circuit Flexibility

March 16, 2017

One of the key design advantages of using a flexible circuit is that it can be bent, folded or twisted in just about any way imaginable.  As part of a Marketing initiative, All Flex built several origami figures using flexible circuits to demonstrate this characteristic. The ability to flex creates...

Shop Floor Documentation

March 7, 2017

Manufacturing shop floor documents are as set of work instructions and procedures detailing the methods for building, testing and inspecting a product; assuring that the product will meet the design and performance requirements of the part number.  To achieve industry certifications such as ISO 9001, AS9100C or MIL-P-50884, documentation systems...

Computer Aided Design for Flexible Circuits

February 25, 2017

In order to define and subsequently fabricate a flexible circuit, a set of electronic documents known as CAD files must be created.   These files contain all the data needed for each software controlled machine to perform its required process step.  The type of data a circuit supplier receives from a...

Considering a Flexible Heater?

February 20, 2017

Custom flexible heaters are available in an infinite variety of sizes, shapes and materials. The most common flexible materials are polyimide and silicone rubber. While silicone rubber has traditionally been thought of as the higher temperature flexible heater option, recent advances in polyimide based materials have allowed high performance heater...

FAQ for Extended Length Flexible Circuits

February 13, 2017

Extended length flexible circuits are larger than “typically” offered sizes in the interconnect industry.   The length of these oversized circuits can be anywhere from 2 feet to 10 feet or longer.   A long continuous flexible circuit can offer design advantages over using normal sized circuits where multiple connections and connection...

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