The quality inspection of carrier tapes is a key link in ensuring the quality of electronic packaging, which includes a series of strict technical standards and inspection processes.
Firstly, it is the detection of dimensional accuracy. A high-precision CCD visual inspection system is used to scan each carrier pocket, ensuring that the depth and width tolerances are controlled within 0.01 millimeters. This precision requirement is even higher than the processing requirements of many precision mechanical parts, because any small dimensional deviation may cause positional deviation of the surface mount machine during material retrieval, resulting in poor component mounting and even equipment failure.
Next is the detection of surface quality. The surface of the carrier tape should not have any scratches, pits, or rough areas, as these problems can cause the cover tape to tilt locally after bonding, exposing the components to air and increasing the risk of oxidation and contamination. The surface friction coefficient must also be controlled below 0.3 to ensure that the cover tape can be peeled off smoothly without damaging the components.
Static electricity detection is another key step, especially for ESD sensitive components such as the carrier tape used in integrated circuit chips. The surface resistance value of the carrier tape must be strictly controlled between 10 ^ 6 and 10 ^ 9 ohms. Carrier tapes within this range can prevent static electricity accumulation without affecting component performance due to excessive conductivity. If the surface resistance value is found to exceed this range during detection, the entire roll of carrier tape must be scrapped.
Sealing testing is equally important. The adhesive strength between the cover tape and the carrier tape needs to be precisely controlled within a suitable range. If it is too tight, it will make it difficult for the surface mount machine to peel off the cover tape during material retrieval, affecting production efficiency. If it is too loose, it will cause the components to fall off during transportation, resulting in product scrap.
Some high-end carriers also need to undergo environmental adaptability testing, such as high temperature and high humidity testing, low temperature storage testing, etc., to ensure stable performance in different environments.
It can be said that the testing standards for carrier tapes are even stricter than many final electronic components themselves, because the quality of carrier tapes directly affects the operational efficiency of the entire SMT production line and the final yield of products.
Our carrier tapes include PS carrier tape, PC carrier tape, and BGA transparent carrier tape. We also offer SMT carrier tape, Custom Carrier tape, Cover tape, High Capability Carrier tape, and ESD carrier tape. If necessary, please send us the pod drawings and contact us.