IPC-A-610 Standards for Electronic Assemblies

IPC-A-610 Question Class 1 Product Class 2 Product Class 3 Product Answer General Electronics Product-includes products where the major requirement is function of the completed assembly. Dedicated Service Electronic Product-continued performance and extended life required. Uninterrupted service is desired but not required. High Performance Electrical Product-continued high performance or performance-on-demand is critical. Equipment downtime cannot be tolerated. Equipment might be used for life support or other critical systems. Who has the ultimate responsibility for identifying the class The customer to which the assembly is evaluated? Invokes a requirement for manufacturers of all Shall classes or product, and failure to comply with the requirement is a noncompliance to this standard. Procurement as agreed and documented between Order of Precedence in the event of conflict 1) customer and supplier. Master drawing or master ass. drawing reflecting the Order of Precedence in the event of conflict 2) customer's detailed requirements. IPC-A-610 when invoked by the customer or Order of Precedence in the event of conflict 3) contract. If documents other than IPC-A-610 are cited, the order of Procurement Documents precedence shall be defined in the_____ A condition that is close to perfect, but is not always Target condition achievable and may not be necessary to ensure the reliability of the assembly. A condition that, while not necessarily perfect, will Acceptable condition maintain integrity and reliability of the assembly. The form, fit or function of the assembly is Defect condition inadequate for use in its end use environment. automatically implies a defect for Class 2 and Class A defect for Class 1_________ 3. A defect for Class 2 implies a defect for Class 3. The determination of how defects should be treated. Disposition These include, rework, use as is, scrap, or repair. The manufacturer, based on design, service and Who dispositions defect conditions? customer requirements. A condition (not a defect) that does not affect the Process Indicator Conditions form, fit or function of a product. Process Indicators should be_____ monitored as part of the process control system. Is disposition of individual process indicators required? Conditions Not Specified The side of a packaging or interconnecting structure (PCB) defined as primary on the master drawing. Primary Side This is usually the side with the most complex or greatest number of components. the component side, or the solder destination side The Primary Side is also known as ______ (in through hole mounting technology). The side of the PCB to which solder is applied. This is Solder Source Side usually the secondary side, but might be the primary side in some cases. The side of the PCB that the solder flows toward in through hole technology. The destination is normally Solder Destination Side the primary side of the PCB, but might be secondary side in some cases. A solder connection that exhibits poor wetting and Cold Solder Connection that is characterized by a gray, porous appearance. What can cause a cold solder connection? Any violation of minimum electrical clearance is _____ Meniscus (component) Nonfunctional Land Wire OverWRAP Wire OverLAP Examples and illustrations... Inspection Methodology Verification of Dimensions Excessive impurities in the solder, inadequate cleaning prior to the soldering, and/or insufficient application of heat during the soldering process. defect condition for all classes. Sealant or encapsulant on a lead, protruding from the seating plane of the component. This includes ceramic, epoxy or other composites, and flash from molded components. A land that is not connected electrically to the conductive pattern on its layer. A wire/lead that is wrapped more than 360 degrees and remains in contact with the terminal post. A wire/lead is wrapped more than 360 degrees and crosses over itself (and does not remain in contact with the terminal post). are often grossly exaggerated in order to depict the reasons for this classification. The inspector does not select the class for the assembly under inspection. The actual measurements provided in this document (ie. specific part mountings and solder fillet dimensions and determination of percentages) are not required except for referee purposes. +/- 15% of the selected magnification power. The tolerance for magnifications aids is____ Illumination at the surface of the workstations should be at 1000lm/m2 [approximately 93 foot candles] least___ Light sources should be selected to prevent__. shadows Terms and definitions for interconnecting and IPC-T-50 packaging electronic circuits. The rapid transfer of static electric charge from one Electrostatic Discharge (ESD) object to another of a different potential that was created from electrostatic sources. The internal result of an unwanted application of Electrical Overstress (EOS) electrical energy that results in damaged components. A triangle with a reaching hand and a slash across Describe the ESD susceptibility symbol. both. Prevents an electrostatic discharge from passing Static Shielding Packaging through the package and into the assembly causing damage. Used to provide inexpensive cushioning and Antistatic (low charging) packaging materials intermediate packaging for ESD sensitive (ESDS) items. Are eating, drinking, and use of tobacco products in the No. work area permitted? Should work areas be kept clean and neat? Yes. What are typical contaminants that might cause soldering Body salts and oils, and unauthorized hand creams. and coating problems? What should be done to prevent ESD and EOS damage to All handling, packing and assembly shall be sensitive components? performed at a static-controlled work station. Land width or land diameter of >=.25 to <=.5mm will have magnification inspection power range of 7.5x to 10x a.... and a maximum referee of 20x. provide an understanding of accept/reject criteria to A main goal of the IPC Professional Training and enhance an individual's ability and motivation to Certification Programs is to.... consistently and correctly apply the technical discrimination criteria. Master IPC Trainer, Certified IPC Trainer, and Certified IPC Specialist certifications expire after How long are IPC certs good for? two years. Certification is valid through the last day of the month, regardless of the day of the month the certification was granted. granted to individuals, not the employing company. Certifications are personal property and are retained when changing employment. IPC Certified Specialist recertification may be provided by.. any Master IPC Trainer or Certified IPC Trainer. Certified IPC Trainers are authorized to grant a single extention of ___ days to a certified IPC specialist. Such 90 exceptions should be noted on the certification document. Certified IPC Specialist training programs will train, What does a certified IPC specialist program accomplish? test and certify in the correct application of the criteria for all product classes. Materials authorized for reproduction by the user will be so identified and provided by IPC in ___format, eg. student electronic training materials(previously called student handbooks) An applicant who completes the training course n fails to pass the cert measurement criteria can retest not sooner than 24 hours but no more than _ days following the original 90 testing, except as authorized in writing by IPC's director of certification Who do you swear to? BATMAN IPC Certifications are personal and portable credentials...