The product must be designed for its operational uses and this is not quality of the solder joint but the design of the joint. The environment in which the product will be used,must also be considered as this is the reliability segment of the design. The design team needs to address all these issues to verify the product will be fabricated to the requirements of the defined class, which is why there is a major price difference between the various classes of products.I don't know the FAA requirements, but I'm fairly confident the proposal submitted must address the classes of product which are going to be built and the measurement or assessment techniques or program which will be used to verify the product goodness. The Class 3 criteria is not based upon the industry but the application of the product.įor a product to be defined as a Class 3 product it must be built according to the total IPC criteria which includes laminate selection,plating thickness, manufacturing processes, material qualifications, facilities arrangements and inspection criteria. The IPC definition of Classes of product is based upon the functionality of the product itself and its functional operation criterion. The inspection category to be used to inspect the product must be defined in the contractual agreement with the customer. The Class or standard used in Aircraft is what the OEM will use in the design submitted to the FAA and has nothing to do with IPC-A-610. Some believe that Class 3 is for aerospace and Class 2 is not. My company is confused about IPC-A-610 Class 2 and Class 3. i.e.Confused About IPC-A-610 Class 2 vs.Includes products where continued performance or performance-on-demand is critical, equipment downtime cannot be tolerated, end-use environment may be uncommonly harsh, and the equipment must function when required, such as life support systems and other critical systems.Class 3: High Performance/Harsh Environment.i.e., Televisions, Game Systems, Home Computing and Telephones.Typically, the end-use environment would not cause failures. Includes products where continued performance and extended life is required, and for which uninterrupted service is desired but not critical.Includes products suitable for applications where the major requirement is the function of the completed assembly.It is an important piece to the process, materials, and inspections standard for the cable and wire harness industry. If the User does not establish and document the acceptance Class, the Manufacturer may do so. The User has the ultimate responsibility for identifying the Class to which the assembly is evaluated. Use of the IPC/WHMA-A-620 standard requires agreement on the Class to which the product belongs.
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