It is clear to circuit designers that flexible circuit innovation provides one-of-a-kind capabilities, possibilities as well as alternatives in electronics system design. Nonetheless, to obtain the advantages of flexible circuits, it is essential to undergo an implementation process that calls for some rigor in idea and also planning prior to laying out to successfully design a well-considered flex circuit that will function properly from the start. Absence of proper preparation can make the difference between appreciating a gratifying encounter or experiencing through a painful one.
Fortunately, the process of implementing flexible circuit technology right into a design is not as challenging today as it when was. The encounters and lessons discovered by flexible circuit innovation’s pioneers now serve as overviews, supplying a map to chart a training course around one of the most frequently experienced barriers.
The simple thirteen-step technique described here offers a standard, easy-to-follow guide to efficiently implementing flexible circuits into new and existing products. The approach and recommended actions supplied are not exhaustive because it is not feasible to expect as well as deal with all of the possible variations. Nonetheless, the procedure laid out items sufficient detail to guide individuals to a satisfactory end result.
1. DEFINE END PRODUCT REQUIREMENTS
A market-driven approach to defining final product requirements is suggested. The item, its application and efficiency expectations need to be given as much interpretation as possible by the end user to ensure that they will get the worth and/or functions they look for. Right now, it is worthwhile to identify if a flexible circuits is even the most effective choice for the product. It is possible that a better or even more cost-effective option can be discovered when other options are discovered. For example,
a thin stiff board might offer merely well as a flex circuit if a thin circuit is the only need.
The possible user should also take into consideration the item’s price targets or demands, product life expectations, dimension, etc., to make sure that the decision to utilize flex circuits is a sound one in terms of cost and also efficiency. Additionally, the individual ought to make sure that the products and also processes to be used will certainly measure up against those requirements.
2. IDENTIFY RELIABILITY REQUIREMENTS
Very early consideration ought to be given to the reliability requirements for the item. What degree of dependability is needed? The IPC makes use of a category system for items according to their end use: Class 1 for customer products, Class 2 for business as well as telecom or Class 3 to satisfy the needs of military-aerospace as well as life support products. Currently a Class 4 demand is under consideration to address items that do not fit entirely into the current set of categories.
Final result requirements heavily influence a number of the options that have to be made in regards to materials as well as procedures. It is also worthwhile to consider product obligation. Just what are the ramifications of product failure due to a flex circuit-related design trouble? While not an always comfy activity, it is essential that obligation is consciously resolved.
Thermal biking is taken into consideration among the vital factors of digital item life (along with flexural toughness), and products from different markets have to withstand extremely various problems. As a quick guide, the IPC supplies a chart to assess and approximate thermal cycling problems for electronic assemblies. It was initially established for as well as can be discovered in IPCSM-785 Guidelines for Accelerated Reliability Test of Surface Mount Solder Attachments.
3. FIGURE OUT OPERATING ENVIRONMENT
Product operating environment determination is a vital factor that will certainly influence later design as well as manufacturing options. Where will completion item be utilized? In an office? At home? In an auto? In an aerospace application? These questions will aid to establish the likely operating environment for the item, what temperature levels and also loved one moisture extremes are to be anticipated over the life of the item as well as how often they may be thermally cycled.
Figuring out the appropriate materials could be simplified by this evaluation, however the assembly procedure should be considered at the same time. There are a number of detailed tools that define the needs for different use atmospheres readily available and can assist in the decision-making process.