Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2-40 storey density multilayer professional supplier, to provide customers with high-precision high quality Shenzhen board, quality assurance, reasonable prices. Peak District or the last heating zone, the role of this area is to raise the temperature of the PCB from the activation temperature to the recommended peak temperature. Active temperature is always a little lower than the melting temperature of the alloy, while the peak temperature is always on the melting point. Typical peak temperature range is about plus solder alloy melting temperature of 40 ℃, working time recirculation zone is 20 - 50s. High temperature setting of the district will make it rise slope exceeds per 2 ~ 5 ℃, or to reflow peak temperature higher than recommended, or long working hours may cause excessive curl PCB delamination or burning, pcb circuit board technology, and damage the integrity of the components. Reflux peak temperature lower than recommended may appear cold welding defects such as short working hours Branch Snyder Department of International Ltd. Shenzhen-Electronic Technology Co., Ltd. - The Department of Electronic Technology Company is a professional custom single-sided, double-sided, 2 -40-storey density multilayer professional supplier, to provide customers with high-precision, high-quality circuit board in Shenzhen, quality assurance, reasonable prices. Accurate calculations plating area and reference affect the actual production process for current, correct determination of the current desired value, pcb circuit board production process, change in the plating process control current to ensure the stability of the plating process parameters; not carried out before plating, First, try using the debug board plating bath resulting in an active state; determining the total current flow direction, and then determine the sequencing of siding, Shenzhen circuit board technology, should adopt the principle from far to near; ensure that the current distribution on any surface uniformity; ensure consistency hole plating and coating thickness uniformity, in addition to the use of technological measures stirred filtration, the need to constantly monitor the use of the impact of current changes in the current in the electroplating process, to ensure the reliability and stability of the current value; detecting hole plating thickness meets the technical requirements. Shenzhen circuit board technology | pcb circuit board technology | Newell Chong (high merchant) by the Department of Shenzhen-Electronic Technology Limited. Road Zhiyuan, temper forward. Newell Shenzhen Electronic Technology Co., Ltd. (www.yipcb.com) (www.yipcb.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the most influential of the printed circuit board business, and you leap together to success!