The copper base board is the most expensive one among the metal substrates, and the heat conduction effect is many times better than that of the aluminum substrate and the iron substrate. It is suitable for high-frequency circuits and regions with high and low temperature variations and the heat dissipation and architectural decoration industries of precision communication equipment.
Generally, the finishing include ENIG, immersion silver, LF HASL, OSP, etc. The copper substrate circuit layer is required to have a large current carrying capacity, so a thick copper foil should be used, and the thickness is generally 35 μm to 280 μm; the thermal conductive insulating layer is the core technology of the copper substrate, and the core thermal conductive component is aluminum oxide and silicon powder. It consists of a polymer filled with epoxy resin, low thermal resistance (0.15), excellent viscoelasticity, resistance to heat aging, and ability to withstand mechanical and thermal stresses.
Copper Base Pcb,Copper Circuit Board,Heavy Copper Pcb,Copper Clad Pcb Chuangying Electronics Co.,Ltd , https://www.cwpcb.com
Baidu shadow stick 3S how to initialize to make the box thin
When using the TV box to install the uninstall application, internal unavoidable cache is inevitable, making the system slower and slower. In fact, we can solve this problem by initializing the TV box. Today I came to teach Baidu Shadow Stick 3S TV box users how to initialize. Because after initialization, the system will be restored to the state just when it was purchased. After the initialization is completed, everyone is better to go to the system upgrade section in the setup to upgrade the Baidu Video Stick 3S system.
Baidu shadow stick 3S how to initialize it? We need to confirm whether the power of the remote controller is sufficient during the formal initialization. If sufficient, we can perform the next operation. After we connect the power of the Baidu 3S, the remote controller is near the TV box and press the left arrow key of the remote controller. This operation remains until the screen restores. If you often enter the desktop of Baidu 3S, then we need to disconnect the TV box and repeat the above operation.
Entering the recovery interface of Baidu Shadow Stick 3S, we will find seven options, the first of which is a restart and we need to use it for a while. The last option, restore system, is the purpose of our visit. Its Chinese meaning is initialization.
We move the cursor to the restore system option and click OK. At this time, Baidu Shadow Stick 3S began to initialize, this process will last 2-3 minutes. When the prompt is completed, we then move the cursor to the first reboot system now and click OK to restart the Baidu 3S. At this time, the initialization of Baidu Shadow Stick 3S has been completed. Users can enter the system upgrade section that is set up to perform system upgrades. A brand new Baidu video stick 3S came back like this.