source:Industry News release time:2022-04-08 Article author:sznbone Popular:pcb
1. Product Definition
Optical fiber circuit boards are also called optoelectronic products, known as optical communication products
Scope of application
Communication short distance signal transmission.
2. Product Features
1. Optical fiber circuit board ultra-small board (3-5 square centimeters);
2. High precision, small optical fiber circuit boards also need to package IC, and some high-level ones also have blind buried holes and even HDI (second-order HDI of Huawei 5G products). Talk about the next second-order HDI design;
3. The shape is attached and the tolerance is strict, and the iron shell is fixed. If it is small, the card will not be tight, and if it is large, it will not fit in. (Some companies are controlled according to the third-level standard, and Huawei's standard is higher than the third-level standard);
4. The PCB fiber optic board adopts the long and short gold finger technology.
3. Commonly used sheets and accessories for optical fiber circuit boards
1. Conventional FR-4 glass fiber circuit board, used in the old version many years ago;
2. M6 sheet, now the upgraded version is partially used;
3. Rogers, high signal frequencies are used more, especially Huawei products.
Optical fiber circuit board
Fourth, the difficulties in the production process and the advantages of the board factory.
1. The shape of the optical fiber circuit board is complex and the molding cost is high (the cost of outsourcing is about 4 minutes and one square centimeter) - there is no need for outsourcing in the shape process;
2. Small batches, small drilling machines have high working costs (model factories are laborious in batches), and large batches are too small to be valued - all 6-axis drilling machines are used;
3. Appearance requirements are high. The copper plug hole must be full, and the gold surface must not have scratches. ——The plug hole is very full, and it is specialized in immersion gold processing;
4. The precision of external dimensions is high, and the equipment must be good (otherwise it cannot be put in, or it will be loose) - 20 new-shaped machine tools;
5. The line accuracy is required to be high, and the data transmission must be stable. - LDI machines;
6. Large quantity, frequent customer complaints, frequent returns, and high business service requirements (proficiency in technology, understanding of processes, and ability to quickly solve problems), 8D customer complaints and post cooperation requirements are very high.
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