SMT Repair Service
SMT repair consists of that while restoring the functional capability of a defective article in a manner that does not assure compliance with applicable drawings or specifications. Think of repair as any physical damage to the board. Repairs of items like lifted or missing pads, broken corners, missing plated throughholes and the like are considered to be repaired. In fact, it is an operation carried out on a PCB that has passed all Inspection and QC tests, has been shipped and has subsequently failed "in the field". It is returned to the repair depot where the SMT repair is carried out.
In contrast to SMT repair rework is often associated with rework. In PCB rework non-complying articles are redone. Through the use of original or equivalent processing, the boards are reprocessed in a manner that assures full compliance of the article with applicable drawings or specifications.
In contrast to SMT repair rework is often associated with rework. In PCB rework non-complying articles are redone. Through the use of original or equivalent processing, the boards are reprocessed in a manner that assures full compliance of the article with applicable drawings or specifications.
There is a multitude of different repair options that encompass SMT repair. One of the most common types of SMT repair is the repair and replacement of SMT pads that have been ripped off during rework or during PCB handling. This repair entails cleaning up of the existing site and then adhesion of a replacement SMT pad via a 2-part epoxy/resin or by heat/pressure and a film adhesive. Another common repair is that of a damaged laminate. This usually occurs due to poor packaging or handling of the PCB. This shows up as a broken corner or a cracked or broken off piece of laminate. These repairs are made by cleaning up the site, preparing the site by undercutting or roughening up the surface for better adhesions and then replacement of the laminate. Certain types of laminate repair can be accomplished by backfilling with a 2-part epoxy or “fitting in” and adhering a replacement piece into the area where the laminate was damaged. Another very common SMT repair consists of the replacement of a damaged or missing throughhole barrel. This is usually the result of an improper rework process or again the result of handling damage.
In all of these as well as other cases BEST adheres to the IPC 7721 PCB repair guidelines for any of the SMT repair techniques.
