The optical connector insertion loss factor is the fiber core to deviate from the design position. MPO connectors in the dislocation core are combined to create the following factors: 1) in the fiber holes in the sleeve from the design position of the dislocation; 2) the gap between the fiber and the fiber hole; 3) the fiber core from the fiber center the gap between the dislocation; 4) guided needle-guided pinhole. In order to reduce the insertion loss, Sumitomo Corporation to reduce the possibility of dislocation and its standard deviation of the fiber core. Determine not only the need to improve the mold to reduce the dislocation of the optical fiber hole, but also the need to reduce the gap between the guide pins and the pilot hole and between the fiber and optical fiber hole. The results suggested that the fiber hole deviation from the design of an ideal location less than 0.7μm, while the guide pinhole and fiber hole clearance should be less than 0.3μm. Also identified the tilt of the fiber hole tolerance is less than 0.2 °.

To this end, the manufacturing of the MT sleeve, take the following measures: sleeve materials and manufacturing methods.In the past, the most common method of manufacturing the sleeve is to transfer molding method, the method is relatively easy to get a precise size. However, the lower the production efficiency of this method is not suitable for mass production. Sumitomo switch to injection molding (injection molding) Act, and the selection of the PPS (polyphenylene sulfide) as the base resin, this resin has a low coefficient of thermal expansion, low water absorption and high mechanical strength. Also choose a suitable filler entering into the base resin to improve its characteristics. Using the injection molding method, not only by shortening the forming process of hardening time, but also through the mold clean after the forming mold to reduce the excess material to reduce the cycle time to transfer one-third of the forming method. Greatly improve the productivity of manufacturing sleeve.

Elastic pin into the jack, in addition to the pin radial elastic contraction, but also accompanied by axial rotating elongation; so it has a smaller insertion and separation force, while a high degree of reliability . The 1000 plug test, contact resistance and the separation of the force did not change significantly. Stranded pins work schematic stranded pins are divided into: PCT needle (Φ0.95mm), micro-needle (Φ0.63mm) nano-needles (Φ0.32mm). Apply to the pitch, 1.27mm, 1.91mm (operating current of 5A) (operating current 3A) and 0.635mm (operating current of 1A) products.

The last: Micro-rectangular connection the classifier micro rectangular connectors to squeeze into aluminum cold shell forms of housing, all-plastic casing, the extension of housing three major categories.