Essay On Flexible Circuit
In the world of electronics, necessity is the mother of all inventions, holds best applicable to the invention, evolution and development of flexible circuits in all types of electrical and electronics gadgets. The flexible circuits have just recently come of age as an interconnection technology, although it was originally developed around two decades ago.
In short, a flexible circuit is "a patterned arrangement of printed wiring utilizing flexible base material with or without flexible cover layers."
Let us first understand the necessity of such circuits and the constraints posed by the earlier technology of printed circuit boards, which led to its invention.
Increased application of electronic devices such as car stereos, heart pacemakers,
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Flexible circuits provide excellent means of reducing assembly time of a product due its properties of flawless integrate form and flexibility, thereby reducing number of assemble operations and testing time.
Thus, now the time for extinction of the printed circuit boards is fast approaching whereas development of flexible circuits is about to reach its pinnacle.
TYPES OF FLEXIBLE CIRCUITS
Flexible circuit is a pattern of conductors created on a bendable film, often polymers, which acts as an insulating base material. The top is coated with an insulating cover layer. A flexible circuit is in fact a counterpart to a rigid printed circuit board.
There are four basic types of flexible circuits, varying in degrees of complexity which can be used in different combinations to solve almost every interconnection design problem.
1. Single-sided flexible circuits -
This is the simplest of all types and provides maximum flexibility for dynamic applications. These simple circuits are also the most easily adaptable to SMT (surface mount technology), TAB (Tape Automated Bonding), and other developments in circuit technology. It is called single sided because the circuit allows access from one side only. Its applications are in the field of optical pick-up for computers, camera, camcorder, VCD players, vibration motors for mobile phones
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