With the advent of the Internet of Everything era, data centers have become the core of optical network construction, and are accelerating the iterative upgrade from 100G to 200G/400G or even 800G higher rates. High-speed, high-density, low-power consumption, and miniaturization have become optical devices. Optical module manufacturers are increasingly pursuing the goal, and the corresponding optical device packaging technology has become increasingly challenging for coupling accuracy, reliability and efficiency.  
     High-speed optical module consists of two parts: receiving part (RX) and transmitting part (TX). The RX part realizes the optical-electric conversion, and the TX part realizes the electric-optical conversion. The packaging process used by the optical module is COB (chip on board). The main purpose is to couple related materials (AWG, FA, Lens, Lens Array, etc.) with the PCB, and finally realize the optical-electricity/electricity of the optical signal. The function of light conversion.

??Physical picture of optical module

??The COB automatic coupling machine launched by Shenzhen Guangtai is mainly used in the automatic packaging and coupling of the key process of optical module TX/RX. It supports 25G/40G/100G/400G/800G and other different speeds, as well as BOX, single-mode and multi-mode coupling methods.

??COB內(nèi)部結(jié)構(gòu)圖

??BOX package diagram

??The machine adopts imported high-precision electric sliding table module + servo system + machine vision positioning system + glue coating system + UV curing system, etc. The main functions are automatic loading and unloading, visual positioning, automatic height measurement, automatic light coupling, Advanced algorithm for finding light in flat area, positive and negative defocusing, etc.

??COB machine internal structure diagram

??The six-axis electric sliding table module is composed of X/Y/Z/θz/θx/θy six-dimensional movable sliding tables. It adopts Japanese Suruga Precision Machinery, with a pulse accuracy of 0.03um and a stepping motor resolution of 0.01um. Among them, θ y is an electric high-precision angle slide, with repeat positioning accuracy ≤ 0.005 ° and resolution ≤ 0.002 °. The stable assembly design improves the stability during the six-axis movement.

??Six-axis electric sliding table module

??The powerful visual image acquisition and processing combined with ingenious logic relationship algorithms can achieve precise positioning and angle adjustment.

??Combined with the characteristics of the light path, design powerful and intelligent coupling algorithms, such as: scanning flat area algorithm, scanning Peak point algorithm, positive and negative defocus algorithm, etc., as shown below:

??(Accurately determine the abnormal AWG incoming material)

??With an open programming method, users can use the methods provided in the software to write materials management and other functions according to their needs, such as reminders of the number of times to wipe glue, reminders of glue expiration, etc.

??Physical map of COB coupling machine

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